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linux/drivers/of/fdt.c

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of/flattree: merge find_flat_dt_string and initial_boot_params Merge common code between Microblaze and PowerPC. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 14:53:09 -07:00
of/fdt: export fdt blob as /sys/firmware/fdt Create a new /sys entry '/sys/firmware/fdt' to export the FDT blob that was passed to the kernel by the bootloader. This allows userland applications such as kexec to access the raw binary. The fact that this node does not reside under /sys/firmware/device-tree is deliberate: FDT is also used on arm64 UEFI/ACPI systems to communicate just the UEFI and ACPI entry points, but the FDT is never unflattened and used to configure the system. A CRC32 checksum is calculated over the entire FDT blob, and verified at late_initcall time. The sysfs entry is instantiated only if the checksum is valid, i.e., if the FDT blob has not been modified in the mean time. Otherwise, a warning is printed. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-14 18:05:35 +01:00
of/flattree: Merge unflatten_device_tree Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:01 -07:00
of/flattree: Merge early_init_dt_check_for_initrd() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24 03:26:58 -07:00
of: consolidate definition of early_init_dt_alloc_memory_arch() Most architectures use the same implementation. Collapse the common ones into a single weak function that can be overridden. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-28 21:18:32 +01:00
of/fdt: Add mutex protection for calls to __unflatten_device_tree() __unflatten_device_tree() calls unflatten_dt_node(), which declares a static variable. It is therefore not reentrant. One of the callers of __unflatten_device_tree(), unflatten_device_tree(), is only called once during early initialization and does not need to be protected. The other caller, of_fdt_unflatten_tree(), can be called at any time, possibly multiple times in parallel. This can happen, for example, if multiple devicetree overlays have to be loaded and installed. Without this protection, errors such as the following may be seen. kernel: End of tree marker overwritten: e6a3a458 kernel: find_target_node: Failed to find target-indirect node at /fragment@0 kernel: __of_overlay_create: of_build_overlay_info() failed for tree@/ Add a mutex to of_fdt_unflatten_tree() to make the call reentrant. Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: stable@vger.kernel.org # v4.1+ Signed-off-by: Rob Herring <robh@kernel.org>
2015-12-05 16:13:53 -08:00
of/flattree: merge find_flat_dt_string and initial_boot_params Merge common code between Microblaze and PowerPC. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 14:53:09 -07:00
drivers: of: add initialization code for dynamic reserved memory This patch adds support for dynamically allocated reserved memory regions declared in device tree. Such regions are defined by 'size', 'alignment' and 'alloc-ranges' properties. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:48 +01:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
of/flattree: Don't assume HAVE_LMB We don't always have lmb available, so make arches provide an early_init_dt_alloc_memory_arch() to handle the allocation of memory in the fdt code. When we don't have lmb.h included, we need asm/page.h for __va. Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michal Simek <monstr@monstr.eu>
2010-02-14 07:13:47 -07:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/fdt: create common debugfs Both powerpc and microblaze have the same FDT blob in debugfs feature. Move this to common location and remove the powerpc and microblaze implementations. This feature could become more useful when FDT overlay support is added. This changes the path of the blob from "$arch/flat-device-tree" to "device-tree/flat-device-tree". Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 16:56:48 -05:00
of/fdt: add FDT serial scanning for earlycon This adds FDT parsing of {linux,}stdout-path to setup an early serial console. Enabling of the early console is triggered with "earlycon" (with no options) on the kernel command line. Platforms must either have fixmap permanent mapping support, have a functioning ioremap when early params are parsed, or explicitly call early_init_dt_scan_chosen_serial from architecture code. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Grant Likely <grant.likely@linaro.org>
2014-03-27 08:07:01 -05:00
of/fdt: export fdt blob as /sys/firmware/fdt Create a new /sys entry '/sys/firmware/fdt' to export the FDT blob that was passed to the kernel by the bootloader. This allows userland applications such as kexec to access the raw binary. The fact that this node does not reside under /sys/firmware/device-tree is deliberate: FDT is also used on arm64 UEFI/ACPI systems to communicate just the UEFI and ACPI entry points, but the FDT is never unflattened and used to configure the system. A CRC32 checksum is calculated over the entire FDT blob, and verified at late_initcall time. The sysfs entry is instantiated only if the checksum is valid, i.e., if the FDT blob has not been modified in the mean time. Otherwise, a warning is printed. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-14 18:05:35 +01:00
of/flattree: merge early_init_dt_scan_memory() common code Merge common code between PowerPC and Microblaze architectures. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Michal Simek <monstr@monstr.eu>
2010-02-01 21:34:14 -07:00
ARM: prom.h: Fix build error by removing unneeded header file Fix the following build error: CC [M] fs/udf/balloc.o In file included from /home/fabio/next/linux-next/arch/arm/include/asm/prom.h:16, from include/linux/of.h:140, from include/asm-generic/gpio.h:7, from arch/arm/plat-mxc/include/mach/irqs.h:14, from /home/fabio/next/linux-next/arch/arm/include/asm/irq.h:4, from /home/fabio/next/linux-next/arch/arm/include/asm/hardirq.h:6, from include/linux/hardirq.h:7, from include/linux/highmem.h:8, from include/linux/pagemap.h:10, from include/linux/buffer_head.h:13, from fs/udf/udfdecl.h:11, from fs/udf/balloc.c:22: /home/fabio/next/linux-next/arch/arm/include/asm/setup.h:146: error: redefinition of 'struct tag' Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> [grant.likely: fix build failure on drivers/of/fdt.c] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-01-02 14:19:03 -02:00
of/flattree: Don't assume HAVE_LMB We don't always have lmb available, so make arches provide an early_init_dt_alloc_memory_arch() to handle the allocation of memory in the fdt code. When we don't have lmb.h included, we need asm/page.h for __va. Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michal Simek <monstr@monstr.eu>
2010-02-14 07:13:47 -07:00
of: Add memory limiting function for flattened devicetrees Buggy bootloaders may pass bogus memory entries in the devicetree. Add of_fdt_limit_memory to add an upper bound on the number of entries that can be present in the devicetree. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Tested-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-07-15 10:03:35 -07:00
of/flattree: Add non-boottime device tree functions In preparation for providing run-time handling of device trees, factor out some of the basic functions so that they take an arbitrary blob, rather than relying on the single boot-time tree. V2: - functions have of_fdt_* names - removed find_flat_dt_string - blob argument is first Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:54:59 -08:00
of/flattree: Add of_flat_dt_match() helper function This patch adds of_flat_dt_match() which tests a node for compatibility with a list of values and converts the relevant powerpc platform code to use it. This approach simplifies the board support code a bit. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
2010-10-30 11:49:09 -04:00
of/flattree: Add non-boottime device tree functions In preparation for providing run-time handling of device trees, factor out some of the basic functions so that they take an arbitrary blob, rather than relying on the single boot-time tree. V2: - functions have of_fdt_* names - removed find_flat_dt_string - blob argument is first Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:54:59 -08:00
of/fdt: use libfdt accessors for header data With libfdt support, we can take advantage of helper accessors in libfdt for accessing the FDT header data. This makes the code more readable and makes the FDT blob structure more opaque to the kernel. This also prepares for removing struct boot_param_header completely. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 22:48:01 -05:00
of/flattree: Add non-boottime device tree functions In preparation for providing run-time handling of device trees, factor out some of the basic functions so that they take an arbitrary blob, rather than relying on the single boot-time tree. V2: - functions have of_fdt_* names - removed find_flat_dt_string - blob argument is first Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:54:59 -08:00
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 23:49:03 -05:00
of/flattree: Add non-boottime device tree functions In preparation for providing run-time handling of device trees, factor out some of the basic functions so that they take an arbitrary blob, rather than relying on the single boot-time tree. V2: - functions have of_fdt_* names - removed find_flat_dt_string - blob argument is first Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:54:59 -08:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Add non-boottime device tree functions In preparation for providing run-time handling of device trees, factor out some of the basic functions so that they take an arbitrary blob, rather than relying on the single boot-time tree. V2: - functions have of_fdt_* names - removed find_flat_dt_string - blob argument is first Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:54:59 -08:00
of/flattree: Add of_flat_dt_match() helper function This patch adds of_flat_dt_match() which tests a node for compatibility with a list of values and converts the relevant powerpc platform code to use it. This approach simplifies the board support code a bit. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
2010-10-30 11:49:09 -04:00
of/flattree: Add non-boottime device tree functions In preparation for providing run-time handling of device trees, factor out some of the basic functions so that they take an arbitrary blob, rather than relying on the single boot-time tree. V2: - functions have of_fdt_* names - removed find_flat_dt_string - blob argument is first Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:54:59 -08:00
of/flattree: Add of_flat_dt_match() helper function This patch adds of_flat_dt_match() which tests a node for compatibility with a list of values and converts the relevant powerpc platform code to use it. This approach simplifies the board support code a bit. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
2010-10-30 11:49:09 -04:00
of/flattree: Add non-boottime device tree functions In preparation for providing run-time handling of device trees, factor out some of the basic functions so that they take an arbitrary blob, rather than relying on the single boot-time tree. V2: - functions have of_fdt_* names - removed find_flat_dt_string - blob argument is first Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:54:59 -08:00
of/fdt: Add endianness helper function for early init code Provide a libfdt-based equivalent for of_device_is_big_endian(), suitable for use in the early_init_* functions. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rob Herring <robh@kernel.org>
2015-04-09 13:05:15 -07:00
of/flattree: Add of_flat_dt_match() helper function This patch adds of_flat_dt_match() which tests a node for compatibility with a list of values and converts the relevant powerpc platform code to use it. This approach simplifies the board support code a bit. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
2010-10-30 11:49:09 -04:00
of/fdt: use libfdt accessors for header data With libfdt support, we can take advantage of helper accessors in libfdt for accessing the FDT header data. This makes the code more readable and makes the FDT blob structure more opaque to the kernel. This also prepares for removing struct boot_param_header completely. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 22:48:01 -05:00
ARM/of: allow *machine_desc.dt_compat to be const This allows dt_compat to point to a constant list of compatible strings. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2011-12-20 22:56:45 +01:00
of/flattree: Add of_flat_dt_match() helper function This patch adds of_flat_dt_match() which tests a node for compatibility with a list of values and converts the relevant powerpc platform code to use it. This approach simplifies the board support code a bit. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
2010-10-30 11:49:09 -04:00
of/fdt: Clean up casting in unflattening path The flat tree unflatting path is using unsigned longs to carry around virtual address pointers to the device tree and the allocated memory used to unpack it. This is a little insane since every access to them needs to be cast to a pointer type before using it. This patch changes the data type to void* for the 'start' and 'mem' pointers and reworks the unflattening functions to use those values directly which results in slightly simpler code. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-29 13:30:35 +01:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Clean up casting in unflattening path The flat tree unflatting path is using unsigned longs to carry around virtual address pointers to the device tree and the allocated memory used to unpack it. This is a little insane since every access to them needs to be cast to a pointer type before using it. This patch changes the data type to void* for the 'start' and 'mem' pointers and reworks the unflattening functions to use those values directly which results in slightly simpler code. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-29 13:30:35 +01:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/flattree: Refactor unflatten_dt_node unflatten_dt_node is a helper function that does most of the work to convert a device tree blob into tree of device nodes. This code now uses a passed-in blob instead of using the single boot-time blob, allowing it to be called in more contexts. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:00 -08:00
of/flattree: minor cleanups - static-ize some functions - add some additional comments Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-17 17:32:35 -07:00
of/fdt: fix argument name and add comments of unflatten_dt_node() Match the name of the third argument in the comment block to the actual function: p -> poffset Add missing comments about the arguments "nodepp" and "dryrun". Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2015-04-13 10:30:20 +09:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: fix argument name and add comments of unflatten_dt_node() Match the name of the third argument in the comment block to the actual function: p -> poffset Add missing comments about the arguments "nodepp" and "dryrun". Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2015-04-13 10:30:20 +09:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: fix argument name and add comments of unflatten_dt_node() Match the name of the third argument in the comment block to the actual function: p -> poffset Add missing comments about the arguments "nodepp" and "dryrun". Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2015-04-13 10:30:20 +09:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Make fdt blob input parameters of unflatten functions const Operations to unflatten fdt blobs never modify the input blobs, hence make them const. Now we no longer need to cast arbitrary const data to "void *" when calling of_fdt_unflatten_tree(). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rob Herring <robh@kernel.org>
2015-05-13 16:33:56 +02:00
of/fdt: Clean up casting in unflattening path The flat tree unflatting path is using unsigned longs to carry around virtual address pointers to the device tree and the allocated memory used to unpack it. This is a little insane since every access to them needs to be cast to a pointer type before using it. This patch changes the data type to void* for the 'start' and 'mem' pointers and reworks the unflattening functions to use those values directly which results in slightly simpler code. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-29 13:30:35 +01:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Refactor unflatten_dt_node unflatten_dt_node is a helper function that does most of the work to convert a device tree blob into tree of device nodes. This code now uses a passed-in blob instead of using the single boot-time blob, allowing it to be called in more contexts. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:00 -08:00
of: Eliminate of_allnodes list The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
2014-10-03 16:28:27 +01:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
drivers: of: removing assignment of 0 to static variable no need to initialise static variable with 0, hence correcting it. Signed-off-by: Saurabh Sengar <saurabh.truth@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
2015-10-27 09:12:01 +05:30
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/fdt: fix allocation size for device node path The allocation size of device node path is off by one which drops the '\0' terminator. Signed-off-by: Ricky Liang <jcliang@chromium.org> Signed-off-by: Rob Herring <robh@kernel.org>
2015-04-14 12:36:05 +08:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: NULL-terminate the root node path Commit 509b7455 (of/fdt: Don't copy garbage after "/" in root node path) sets the path length to 0 to ignore any garbage after "/" in the root node path. This has the side effect of also ignoring '\0' at the end of the root node path. This patch sets the ignores the garbage by setting the last character to '\0' and length to 1. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-11-16 15:14:38 +00:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of: Eliminate of_allnodes list The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
2014-10-03 16:28:27 +01:00
drivers/of: Constify device_node->name and ->path_component_name Neither of these should ever be changed once set. Make them const and fix up the users that try to modify it in-place. In one case kmalloc+memcpy is replaced with kstrdup() to avoid modifying the string. Build tested with defconfigs on ARM, PowerPC, Sparc, MIPS, x86 among others. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Julian Calaby <julian.calaby@gmail.com>
2012-11-14 22:37:12 +00:00
of: device_node kobject lifecycle fixes After the move to having device nodes be proper kobjects the lifecycle of the node needs to be controlled better. At first convert of_add_node() in the unflattened functions to of_init_node() which initializes the kobject so that of_node_get/put work correctly even before of_init is called. Afterwards introduce of_node_is_initialized & of_node_is_attached that query the underlying kobject about the state (attached means kobj is visible in sysfs) Using that make sure the lifecycle of the tree is correct at all times. Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com> [grant.likely: moved of_node_init() calls, fixed up locking, and dropped __of_populate() hunks] Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-12-13 20:08:59 +02:00
drivers/of: Constify device_node->name and ->path_component_name Neither of these should ever be changed once set. Make them const and fix up the users that try to modify it in-place. In one case kmalloc+memcpy is replaced with kstrdup() to avoid modifying the string. Build tested with defconfigs on ARM, PowerPC, Sparc, MIPS, x86 among others. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Julian Calaby <julian.calaby@gmail.com>
2012-11-14 22:37:12 +00:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
drivers/of: Constify device_node->name and ->path_component_name Neither of these should ever be changed once set. Make them const and fix up the users that try to modify it in-place. In one case kmalloc+memcpy is replaced with kstrdup() to avoid modifying the string. Build tested with defconfigs on ARM, PowerPC, Sparc, MIPS, x86 among others. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Julian Calaby <julian.calaby@gmail.com>
2012-11-14 22:37:12 +00:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of: Drop ->next pointer from struct device_node The ->next pointer in struct device_node is a hanger-on from when it was used to iterate over the whole tree by a particular device_type property value. Those days are long over, but the fdt unflattening code still uses it to put nodes in the unflattened tree into the same order as node in the flat tree. By reworking the unflattening code to reverse the list after unflattening all the children of a node, the pointer can be dropped which gives a small amount of memory savings. Signed-off-by: Grant Likely <grant.likely@linaro.org> Acked-by: Frank Rowand <frank.rowand@sonymobile.com> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com>
2014-11-28 16:03:33 +00:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/flattree: minor cleanups - static-ize some functions - add some additional comments Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-17 17:32:35 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of: Eliminate of_allnodes list The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
2014-10-03 16:28:27 +01:00
of/flattree: Make the kernel accept ePAPR style phandle information Currently when processing flattened device trees, the kernel expects the phandle in a property called "linux,phandle". The ePAPR spec - not being Linux specific - instead requires phandles to be encoded in a property named simply "phandle". This patch makes the kernel accept either form when unflattening the device tree. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-02-01 21:34:15 -07:00
of: unify phandle name in struct device_node In struct device_node, the phandle is named 'linux_phandle' for PowerPC and MicroBlaze, and 'node' for SPARC. There is no good reason for the difference, it is just an artifact of the code diverging over a couple of years. This patch renames both to simply .phandle. Note: the .node also existed in PowerPC/MicroBlaze, but the only user seems to be arch/powerpc/platforms/powermac/pfunc_core.c. It doesn't look like the assignment between .linux_phandle and .node is significantly different enough to warrant the separate code paths unless ibm,phandle properties actually appear in Apple device trees. I think it is safe to eliminate the old .node property and use phandle everywhere. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-01-28 14:06:53 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/flattree: Make the kernel accept ePAPR style phandle information Currently when processing flattened device trees, the kernel expects the phandle in a property called "linux,phandle". The ePAPR spec - not being Linux specific - instead requires phandles to be encoded in a property named simply "phandle". This patch makes the kernel accept either form when unflattening the device tree. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-02-01 21:34:15 -07:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of: Eliminate of_allnodes list The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
2014-10-03 16:28:27 +01:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of: Eliminate of_allnodes list The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
2014-10-03 16:28:27 +01:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of: Eliminate of_allnodes list The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
2014-10-03 16:28:27 +01:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of: Drop ->next pointer from struct device_node The ->next pointer in struct device_node is a hanger-on from when it was used to iterate over the whole tree by a particular device_type property value. Those days are long over, but the fdt unflattening code still uses it to put nodes in the unflattened tree into the same order as node in the flat tree. By reworking the unflattening code to reverse the list after unflattening all the children of a node, the pointer can be dropped which gives a small amount of memory savings. Signed-off-by: Grant Likely <grant.likely@linaro.org> Acked-by: Frank Rowand <frank.rowand@sonymobile.com> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com>
2014-11-28 16:03:33 +00:00
of: Eliminate of_allnodes list The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
2014-10-03 16:28:27 +01:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Merge unflatten_dt_node Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:00 -07:00
of/flattree: Merge unflatten_device_tree Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:01 -07:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: Make fdt blob input parameters of unflatten functions const Operations to unflatten fdt blobs never modify the input blobs, hence make them const. Now we no longer need to cast arbitrary const data to "void *" when calling of_fdt_unflatten_tree(). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rob Herring <robh@kernel.org>
2015-05-13 16:33:56 +02:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: Clean up casting in unflattening path The flat tree unflatting path is using unsigned longs to carry around virtual address pointers to the device tree and the allocated memory used to unpack it. This is a little insane since every access to them needs to be cast to a pointer type before using it. This patch changes the data type to void* for the 'start' and 'mem' pointers and reworks the unflattening functions to use those values directly which results in slightly simpler code. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-29 13:30:35 +01:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: use libfdt accessors for header data With libfdt support, we can take advantage of helper accessors in libfdt for accessing the FDT header data. This makes the code more readable and makes the FDT blob structure more opaque to the kernel. This also prepares for removing struct boot_param_header completely. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 22:48:01 -05:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: use libfdt accessors for header data With libfdt support, we can take advantage of helper accessors in libfdt for accessing the FDT header data. This makes the code more readable and makes the FDT blob structure more opaque to the kernel. This also prepares for removing struct boot_param_header completely. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 22:48:01 -05:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of: Eliminate of_allnodes list The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
2014-10-03 16:28:27 +01:00
of/fdt: Clean up casting in unflattening path The flat tree unflatting path is using unsigned longs to carry around virtual address pointers to the device tree and the allocated memory used to unpack it. This is a little insane since every access to them needs to be cast to a pointer type before using it. This patch changes the data type to void* for the 'start' and 'mem' pointers and reworks the unflattening functions to use those values directly which results in slightly simpler code. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-29 13:30:35 +01:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: Clean up casting in unflattening path The flat tree unflatting path is using unsigned longs to carry around virtual address pointers to the device tree and the allocated memory used to unpack it. This is a little insane since every access to them needs to be cast to a pointer type before using it. This patch changes the data type to void* for the 'start' and 'mem' pointers and reworks the unflattening functions to use those values directly which results in slightly simpler code. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-29 13:30:35 +01:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: Clean up casting in unflattening path The flat tree unflatting path is using unsigned longs to carry around virtual address pointers to the device tree and the allocated memory used to unpack it. This is a little insane since every access to them needs to be cast to a pointer type before using it. This patch changes the data type to void* for the 'start' and 'mem' pointers and reworks the unflattening functions to use those values directly which results in slightly simpler code. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-29 13:30:35 +01:00
of: fdt: fix memory initialization for expanded DT Already existing property flags are filled wrong for properties created from initial FDT. This could cause problems if this DYNAMIC device-tree functions are used later, i.e. properties are attached/detached/replaced. Simply dumping flags from the running system show, that some initial static (not allocated via kzmalloc()) nodes are marked as dynamic. I putted some debug extensions to property_proc_show(..) : .. + if (OF_IS_DYNAMIC(pp)) + pr_err("DEBUG: xxx : OF_IS_DYNAMIC\n"); + if (OF_IS_DETACHED(pp)) + pr_err("DEBUG: xxx : OF_IS_DETACHED\n"); when you operate on the nodes (e.g.: ~$ cat /proc/device-tree/*some_node*) you will see that those flags are filled wrong, basically in most cases it will dump a DYNAMIC or DETACHED status, which is in not true. (BTW. this OF_IS_DETACHED is a own define for debug purposes which which just make a test_bit(OF_DETACHED, &x->_flags) If nodes are dynamic kernel is allowed to kfree() them. But it will crash attempting to do so on the nodes from FDT -- they are not allocated via kzmalloc(). Signed-off-by: Wladislav Wiebe <wladislav.kw@gmail.com> Acked-by: Alexander Sverdlin <alexander.sverdlin@nsn.com> Cc: stable@vger.kernel.org Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2013-08-12 13:06:53 +02:00
of/fdt: Clean up casting in unflattening path The flat tree unflatting path is using unsigned longs to carry around virtual address pointers to the device tree and the allocated memory used to unpack it. This is a little insane since every access to them needs to be cast to a pointer type before using it. This patch changes the data type to void* for the 'start' and 'mem' pointers and reworks the unflattening functions to use those values directly which results in slightly simpler code. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-29 13:30:35 +01:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of: Eliminate of_allnodes list The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
2014-10-03 16:28:27 +01:00
of/fdt: Clean up casting in unflattening path The flat tree unflatting path is using unsigned longs to carry around virtual address pointers to the device tree and the allocated memory used to unpack it. This is a little insane since every access to them needs to be cast to a pointer type before using it. This patch changes the data type to void* for the 'start' and 'mem' pointers and reworks the unflattening functions to use those values directly which results in slightly simpler code. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-29 13:30:35 +01:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: Clean up casting in unflattening path The flat tree unflatting path is using unsigned longs to carry around virtual address pointers to the device tree and the allocated memory used to unpack it. This is a little insane since every access to them needs to be cast to a pointer type before using it. This patch changes the data type to void* for the 'start' and 'mem' pointers and reworks the unflattening functions to use those values directly which results in slightly simpler code. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-29 13:30:35 +01:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: Add mutex protection for calls to __unflatten_device_tree() __unflatten_device_tree() calls unflatten_dt_node(), which declares a static variable. It is therefore not reentrant. One of the callers of __unflatten_device_tree(), unflatten_device_tree(), is only called once during early initialization and does not need to be protected. The other caller, of_fdt_unflatten_tree(), can be called at any time, possibly multiple times in parallel. This can happen, for example, if multiple devicetree overlays have to be loaded and installed. Without this protection, errors such as the following may be seen. kernel: End of tree marker overwritten: e6a3a458 kernel: find_target_node: Failed to find target-indirect node at /fragment@0 kernel: __of_overlay_create: of_build_overlay_info() failed for tree@/ Add a mutex to of_fdt_unflatten_tree() to make the call reentrant. Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: stable@vger.kernel.org # v4.1+ Signed-off-by: Rob Herring <robh@kernel.org>
2015-12-05 16:13:53 -08:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: Make fdt blob input parameters of unflatten functions const Operations to unflatten fdt blobs never modify the input blobs, hence make them const. Now we no longer need to cast arbitrary const data to "void *" when calling of_fdt_unflatten_tree(). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rob Herring <robh@kernel.org>
2015-05-13 16:33:56 +02:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/fdt: Add mutex protection for calls to __unflatten_device_tree() __unflatten_device_tree() calls unflatten_dt_node(), which declares a static variable. It is therefore not reentrant. One of the callers of __unflatten_device_tree(), unflatten_device_tree(), is only called once during early initialization and does not need to be protected. The other caller, of_fdt_unflatten_tree(), can be called at any time, possibly multiple times in parallel. This can happen, for example, if multiple devicetree overlays have to be loaded and installed. Without this protection, errors such as the following may be seen. kernel: End of tree marker overwritten: e6a3a458 kernel: find_target_node: Failed to find target-indirect node at /fragment@0 kernel: __of_overlay_create: of_build_overlay_info() failed for tree@/ Add a mutex to of_fdt_unflatten_tree() to make the call reentrant. Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: stable@vger.kernel.org # v4.1+ Signed-off-by: Rob Herring <robh@kernel.org>
2015-12-05 16:13:53 -08:00
of/fdt: use libfdt accessors for header data With libfdt support, we can take advantage of helper accessors in libfdt for accessing the FDT header data. This makes the code more readable and makes the FDT blob structure more opaque to the kernel. This also prepares for removing struct boot_param_header completely. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 22:48:01 -05:00
of/fdt: Add mutex protection for calls to __unflatten_device_tree() __unflatten_device_tree() calls unflatten_dt_node(), which declares a static variable. It is therefore not reentrant. One of the callers of __unflatten_device_tree(), unflatten_device_tree(), is only called once during early initialization and does not need to be protected. The other caller, of_fdt_unflatten_tree(), can be called at any time, possibly multiple times in parallel. This can happen, for example, if multiple devicetree overlays have to be loaded and installed. Without this protection, errors such as the following may be seen. kernel: End of tree marker overwritten: e6a3a458 kernel: find_target_node: Failed to find target-indirect node at /fragment@0 kernel: __of_overlay_create: of_build_overlay_info() failed for tree@/ Add a mutex to of_fdt_unflatten_tree() to make the call reentrant. Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: stable@vger.kernel.org # v4.1+ Signed-off-by: Rob Herring <robh@kernel.org>
2015-12-05 16:13:53 -08:00
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:02 -08:00
of/flattree: Reorder unflatten_dt_node Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:01 -08:00
of/fdt: convert initial_boot_params to opaque pointer Now that all accesses to FDT header data has been converted to accessor helpers, initial_boot_params can become an opaque pointer. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-03-31 15:25:04 -05:00
of/flattree: Reorder unflatten_dt_node Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:01 -08:00
of/fdt: export fdt blob as /sys/firmware/fdt Create a new /sys entry '/sys/firmware/fdt' to export the FDT blob that was passed to the kernel by the bootloader. This allows userland applications such as kexec to access the raw binary. The fact that this node does not reside under /sys/firmware/device-tree is deliberate: FDT is also used on arm64 UEFI/ACPI systems to communicate just the UEFI and ACPI entry points, but the FDT is never unflattened and used to configure the system. A CRC32 checksum is calculated over the entire FDT blob, and verified at late_initcall time. The sysfs entry is instantiated only if the checksum is valid, i.e., if the FDT blob has not been modified in the mean time. Otherwise, a warning is printed. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-14 18:05:35 +01:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 23:49:03 -05:00
drivers: of: add initialization code for dynamic reserved memory This patch adds support for dynamically allocated reserved memory regions declared in device tree. Such regions are defined by 'size', 'alignment' and 'alloc-ranges' properties. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:48 +01:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
of: Allow mem_reserve of memory with a base address of zero __reserved_mem_reserve_reg() won't reserve memory if the base address is zero. This change removes the check for a base address of zero and allows it to be reserved. Allowing the first 4K of memory to be reserved will help solve a problem on some ARM systems where the the first 16K of memory is unused and becomes allocable memory. This will prevent this memory from being used for DMA by drivers like the USB OHCI driver which consider a physical address of zero to be illegal. Cc: stable@vger.kernel.org # 3.15+ Signed-off-by: Al Cooper <alcooperx@gmail.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-08-06 16:30:04 -04:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
drivers: of: add initialization code for dynamic reserved memory This patch adds support for dynamically allocated reserved memory regions declared in device tree. Such regions are defined by 'size', 'alignment' and 'alloc-ranges' properties. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:48 +01:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
of: Fix the section mismatch warnings. In tag next-20140407, building with CONFIG_DEBUG_SECTION_MISMATCH enabled, the following WARNING is occured: WARNING: drivers/built-in.o(.text.unlikely+0x2220): Section mismatch in reference from the function __reserved_mem_check_root() to the function .init.text:of_get_flat_dt_prop() The function __reserved_mem_check_root() references the function __init of_get_flat_dt_prop(). This is often because __reserved_mem_check_root lacks a __init annotation or the annotation of of_get_flat_dt_prop is wrong. WARNING: vmlinux.o(.text.unlikely+0xb9d0): Section mismatch in reference from the function __reserved_mem_check_root() to the (unknown reference) .init.data:(unknown) The function __reserved_mem_check_root() references the (unknown reference) __initdata (unknown). This is often because __reserved_mem_check_root lacks a __initdata annotation or the annotation of (unknown) is wrong. This is cause by : 'drivers: of: add initialization code for dynamic reserved memory'. Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com> Signed-off-by: Rob Herring <robh@kernel.org>
2014-04-08 13:48:07 +08:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 23:49:03 -05:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
drivers: of: add initialization code for dynamic reserved memory This patch adds support for dynamically allocated reserved memory regions declared in device tree. Such regions are defined by 'size', 'alignment' and 'alloc-ranges' properties. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:48 +01:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
drivers: of: add initialization code for dynamic reserved memory This patch adds support for dynamically allocated reserved memory regions declared in device tree. Such regions are defined by 'size', 'alignment' and 'alloc-ranges' properties. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:48 +01:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
of/fdt: move memreserve and dtb memory reservations into core Move the /memreserve/ processing and dtb memory reservations into early_init_fdt_scan_reserved_mem. This converts arm, arm64, and powerpc as they are the only users of early_init_fdt_scan_reserved_mem. memblock_reserve is safe to call on the same region twice, so the reservation check for the dtb in powerpc 32-bit reservations is safe to remove. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 22:46:48 -05:00
of: only scan for reserved mem when fdt present When the reserved memory patches hit -next, several legacy (non-DT) boot failures were detected and bisected down to that commit. There needs to be some sanity checking whether a DT is even present before parsing the reserved ranges. Reported-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Josh Cartwright <joshc@codeaurora.org> Tested-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-03-13 16:36:36 -05:00
of/fdt: move memreserve and dtb memory reservations into core Move the /memreserve/ processing and dtb memory reservations into early_init_fdt_scan_reserved_mem. This converts arm, arm64, and powerpc as they are the only users of early_init_fdt_scan_reserved_mem. memblock_reserve is safe to call on the same region twice, so the reservation check for the dtb in powerpc 32-bit reservations is safe to remove. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 22:46:48 -05:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
drivers: of: add initialization code for dynamic reserved memory This patch adds support for dynamically allocated reserved memory regions declared in device tree. Such regions are defined by 'size', 'alignment' and 'alloc-ranges' properties. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:48 +01:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
of/fdt: split off FDT self reservation from memreserve processing This splits off the reservation of the memory occupied by the FDT binary itself from the processing of the memory reservations it contains. This is necessary because the physical address of the FDT, which is needed to perform the reservation, may not be known to the FDT driver core, i.e., it may be mapped outside the linear direct mapping, in which case __pa() returns a bogus value. Cc: Russell King <linux@arm.linux.org.uk> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-06-01 13:40:31 +02:00
of/flattree: Reorder unflatten_dt_node Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:01 -08:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Reorder unflatten_dt_node Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:01 -08:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Reorder unflatten_dt_node Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:01 -08:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
drivers/of/fdt.c: re-use kernel's kbasename() Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-17 16:01:28 -08:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Reorder unflatten_dt_node Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:01 -08:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Reorder unflatten_dt_node Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:01 -08:00
of/fdt: introduce of_get_flat_dt_size Add a wrapper function to retrieve the FDT size from the FDT header. This is primarily to avoid libfdt include paths for the whole kernel. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-22 12:55:10 -05:00
of/flattree: Reorder unflatten_dt_node Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:01 -08:00
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 23:49:03 -05:00
of/flattree: Reorder unflatten_dt_node Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:01 -08:00
of/fdt: Convert FDT functions to use libfdt The kernel FDT functions predate libfdt and are much more limited in functionality. Also, the kernel functions and libfdt functions are not compatible with each other because they have different definitions of node offsets. To avoid this incompatibility and in preparation to add more FDT parsing functions which will need libfdt, let's first convert the existing code to use libfdt. The FDT unflattening, top-level FDT scanning, and property retrieval functions are converted to use libfdt. The scanning code should be re-worked to be more efficient and understandable by using libfdt to find nodes directly by path or compatible strings. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 15:10:14 -05:00
of/flattree: Reorder unflatten_dt_node Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:55:01 -08:00
of/flattree: Add of_flat_dt_match() helper function This patch adds of_flat_dt_match() which tests a node for compatibility with a list of values and converts the relevant powerpc platform code to use it. This approach simplifies the board support code a bit. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
2010-10-30 11:49:09 -04:00
ARM/of: allow *machine_desc.dt_compat to be const This allows dt_compat to point to a constant list of compatible strings. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2011-12-20 22:56:45 +01:00
of/flattree: Add of_flat_dt_match() helper function This patch adds of_flat_dt_match() which tests a node for compatibility with a list of values and converts the relevant powerpc platform code to use it. This approach simplifies the board support code a bit. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
2010-10-30 11:49:09 -04:00
drivers: of: add function to scan fdt nodes given by path Add a function to scan the flattened device-tree starting from the node given by the path. It is used to extract information (like reserved memory), which is required on early boot before we can unflatten the tree. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Michal Nazarewicz <mina86@mina86.com> Acked-by: Tomasz Figa <t.figa@samsung.com> Reviewed-by: Rob Herring <rob.herring@calxeda.com>
2013-08-26 14:41:56 +02:00
of: introduce common FDT machine related functions Introduce common of_flat_dt_match_machine and of_flat_dt_get_machine_name functions to unify architectures' handling of machine level model and compatible properties. Several architectures match the root compatible string with an arch specific list of machine descriptors duplicating the same search algorithm. Create a common implementation with a simple architecture specific hook to iterate over each machine's match table. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-27 21:41:56 -05:00
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 23:49:03 -05:00
of: introduce common FDT machine related functions Introduce common of_flat_dt_match_machine and of_flat_dt_get_machine_name functions to unify architectures' handling of machine level model and compatible properties. Several architectures match the root compatible string with an arch specific list of machine descriptors duplicating the same search algorithm. Create a common implementation with a simple architecture specific hook to iterate over each machine's match table. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-27 21:41:56 -05:00
of/flattree: Merge early_init_dt_check_for_initrd() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24 03:26:58 -07:00
of: remove early_init_dt_setup_initrd_arch All arches do essentially the same thing now for early_init_dt_setup_initrd_arch, so it can now be removed. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-30 17:06:53 -05:00
of/flattree: Merge early_init_dt_check_for_initrd() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24 03:26:58 -07:00
of: Specify initrd location using 64-bit On some PAE architectures, the entire range of physical memory could reside outside the 32-bit limit. These systems need the ability to specify the initrd location using 64-bit numbers. This patch globally modifies the early_init_dt_setup_initrd_arch() function to use 64-bit numbers instead of the current unsigned long. There has been quite a bit of debate about whether to use u64 or phys_addr_t. It was concluded to stick to u64 to be consistent with rest of the device tree code. As summarized by Geert, "The address to load the initrd is decided by the bootloader/user and set at that point later in time. The dtb should not be tied to the kernel you are booting" More details on the discussion can be found here: https://lkml.org/lkml/2013/6/20/690 https://lkml.org/lkml/2012/9/13/544 Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-07-01 14:20:35 -04:00
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 23:49:03 -05:00
of/flattree: Merge early_init_dt_check_for_initrd() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24 03:26:58 -07:00
of/flattree: use callback to setup initrd from /chosen At present, the fdt code sets the kernel-wide initrd_start and initrd_end variables when parsing /chosen. On ARM, we only set these once the bootmem has been reserved. This change adds an arch hook to setup the initrd from the device tree: void early_init_dt_setup_initrd_arch(unsigned long start, unsigned long end); The arch-specific code can then setup the initrd however it likes. Compiled on powerpc, with CONFIG_BLK_DEV_INITRD=y and =n. Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-01-30 01:31:21 -07:00
of: Specify initrd location using 64-bit On some PAE architectures, the entire range of physical memory could reside outside the 32-bit limit. These systems need the ability to specify the initrd location using 64-bit numbers. This patch globally modifies the early_init_dt_setup_initrd_arch() function to use 64-bit numbers instead of the current unsigned long. There has been quite a bit of debate about whether to use u64 or phys_addr_t. It was concluded to stick to u64 to be consistent with rest of the device tree code. As summarized by Geert, "The address to load the initrd is decided by the bootloader/user and set at that point later in time. The dtb should not be tied to the kernel you are booting" More details on the discussion can be found here: https://lkml.org/lkml/2013/6/20/690 https://lkml.org/lkml/2012/9/13/544 Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-07-01 14:20:35 -04:00
of/flattree: Merge early_init_dt_check_for_initrd() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24 03:26:58 -07:00
of/flattree: use callback to setup initrd from /chosen At present, the fdt code sets the kernel-wide initrd_start and initrd_end variables when parsing /chosen. On ARM, we only set these once the bootmem has been reserved. This change adds an arch hook to setup the initrd from the device tree: void early_init_dt_setup_initrd_arch(unsigned long start, unsigned long end); The arch-specific code can then setup the initrd however it likes. Compiled on powerpc, with CONFIG_BLK_DEV_INITRD=y and =n. Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-01-30 01:31:21 -07:00
of: Specify initrd location using 64-bit On some PAE architectures, the entire range of physical memory could reside outside the 32-bit limit. These systems need the ability to specify the initrd location using 64-bit numbers. This patch globally modifies the early_init_dt_setup_initrd_arch() function to use 64-bit numbers instead of the current unsigned long. There has been quite a bit of debate about whether to use u64 or phys_addr_t. It was concluded to stick to u64 to be consistent with rest of the device tree code. As summarized by Geert, "The address to load the initrd is decided by the bootloader/user and set at that point later in time. The dtb should not be tied to the kernel you are booting" More details on the discussion can be found here: https://lkml.org/lkml/2013/6/20/690 https://lkml.org/lkml/2012/9/13/544 Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-07-01 14:20:35 -04:00
of/flattree: Merge early_init_dt_check_for_initrd() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24 03:26:58 -07:00
of: remove early_init_dt_setup_initrd_arch All arches do essentially the same thing now for early_init_dt_setup_initrd_arch, so it can now be removed. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-30 17:06:53 -05:00
of: Specify initrd location using 64-bit On some PAE architectures, the entire range of physical memory could reside outside the 32-bit limit. These systems need the ability to specify the initrd location using 64-bit numbers. This patch globally modifies the early_init_dt_setup_initrd_arch() function to use 64-bit numbers instead of the current unsigned long. There has been quite a bit of debate about whether to use u64 or phys_addr_t. It was concluded to stick to u64 to be consistent with rest of the device tree code. As summarized by Geert, "The address to load the initrd is decided by the bootloader/user and set at that point later in time. The dtb should not be tied to the kernel you are booting" More details on the discussion can be found here: https://lkml.org/lkml/2013/6/20/690 https://lkml.org/lkml/2012/9/13/544 Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-07-01 14:20:35 -04:00
of/flattree: Merge early_init_dt_check_for_initrd() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24 03:26:58 -07:00
of: remove early_init_dt_setup_initrd_arch All arches do essentially the same thing now for early_init_dt_setup_initrd_arch, so it can now be removed. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-30 17:06:53 -05:00
of/flattree: Merge early_init_dt_check_for_initrd() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24 03:26:58 -07:00
of/fdt: add FDT serial scanning for earlycon This adds FDT parsing of {linux,}stdout-path to setup an early serial console. Enabling of the early console is triggered with "earlycon" (with no options) on the kernel command line. Platforms must either have fixmap permanent mapping support, have a functioning ioremap when early params are parsed, or explicitly call early_init_dt_scan_chosen_serial from architecture code. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Grant Likely <grant.likely@linaro.org>
2014-03-27 08:07:01 -05:00
of/fdt: fix sparse warning this patch fixes following sparse warning: fdt.c:765:12: warning: symbol 'early_init_dt_scan_chosen_serial' was not declared. Should it be static? Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
2015-02-04 12:04:06 +00:00
of/fdt: add FDT serial scanning for earlycon This adds FDT parsing of {linux,}stdout-path to setup an early serial console. Enabling of the early console is triggered with "earlycon" (with no options) on the kernel command line. Platforms must either have fixmap permanent mapping support, have a functioning ioremap when early params are parsed, or explicitly call early_init_dt_scan_chosen_serial from architecture code. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Grant Likely <grant.likely@linaro.org>
2014-03-27 08:07:01 -05:00
of/fdt: fix aliases with baudrate in earlycon Many boards use an alias in the stdout-path specification along with console options after a colon (e.g. serial0:115200n8). When using earlycon, this specification currently does not work. While fdt_path_offset supports alias resolution, it does not remove the console options by itself. Use the fdt_path_offset_namelen variant and provide the length of the alias to enable aliases with console options in the stdout-path. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Rob Herring <robh@kernel.org>
2015-10-10 01:29:30 -07:00
of/fdt: add FDT serial scanning for earlycon This adds FDT parsing of {linux,}stdout-path to setup an early serial console. Enabling of the early console is triggered with "earlycon" (with no options) on the kernel command line. Platforms must either have fixmap permanent mapping support, have a functioning ioremap when early params are parsed, or explicitly call early_init_dt_scan_chosen_serial from architecture code. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Grant Likely <grant.likely@linaro.org>
2014-03-27 08:07:01 -05:00
of/fdt: fix aliases with baudrate in earlycon Many boards use an alias in the stdout-path specification along with console options after a colon (e.g. serial0:115200n8). When using earlycon, this specification currently does not work. While fdt_path_offset supports alias resolution, it does not remove the console options by itself. Use the fdt_path_offset_namelen variant and provide the length of the alias to enable aliases with console options in the stdout-path. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Rob Herring <robh@kernel.org>
2015-10-10 01:29:30 -07:00
of/fdt: add FDT serial scanning for earlycon This adds FDT parsing of {linux,}stdout-path to setup an early serial console. Enabling of the early console is triggered with "earlycon" (with no options) on the kernel command line. Platforms must either have fixmap permanent mapping support, have a functioning ioremap when early params are parsed, or explicitly call early_init_dt_scan_chosen_serial from architecture code. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Grant Likely <grant.likely@linaro.org>
2014-03-27 08:07:01 -05:00
of: Fix crash if an earlycon driver is not found __earlycon_of_table_sentinel.compatible is a char[128], not a pointer, so it will never be NULL. Checking it against NULL causes the match loop to run past the end of the array, and eventually match a bogus entry, under the following conditions: - Kernel command line specifies "earlycon" with no parameters - DT has a stdout-path pointing to a UART node - The UART driver doesn't use OF_EARLYCON_DECLARE (or maybe the console driver is compiled out) Fix this by checking to see if match->compatible is a non-empty string. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Cc: <stable@vger.kernel.org> # 3.16+ Signed-off-by: Rob Herring <robh@kernel.org>
2014-11-09 00:55:47 -08:00
of/fdt: fix error checking for earlycon address fdt_translate_address() returns OF_BAD_ADDR on error. It is defined as a u64 value, so the variable "addr" should be defined as u64 as well. Fixes: fb11ffe74c79 ("of/fdt: add FDT serial scanning for earlycon") Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Rob Herring <robh@kernel.org>
2015-10-23 20:47:20 +09:00
of/fdt: add FDT serial scanning for earlycon This adds FDT parsing of {linux,}stdout-path to setup an early serial console. Enabling of the early console is triggered with "earlycon" (with no options) on the kernel command line. Platforms must either have fixmap permanent mapping support, have a functioning ioremap when early params are parsed, or explicitly call early_init_dt_scan_chosen_serial from architecture code. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Grant Likely <grant.likely@linaro.org>
2014-03-27 08:07:01 -05:00
of/fdt: fix error checking for earlycon address fdt_translate_address() returns OF_BAD_ADDR on error. It is defined as a u64 value, so the variable "addr" should be defined as u64 as well. Fixes: fb11ffe74c79 ("of/fdt: add FDT serial scanning for earlycon") Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Rob Herring <robh@kernel.org>
2015-10-23 20:47:20 +09:00
of/fdt: add FDT serial scanning for earlycon This adds FDT parsing of {linux,}stdout-path to setup an early serial console. Enabling of the early console is triggered with "earlycon" (with no options) on the kernel command line. Platforms must either have fixmap permanent mapping support, have a functioning ioremap when early params are parsed, or explicitly call early_init_dt_scan_chosen_serial from architecture code. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Grant Likely <grant.likely@linaro.org>
2014-03-27 08:07:01 -05:00
of/flattree: Merge earlyinit_dt_scan_root() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-11-24 03:27:10 -07:00
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 23:49:03 -05:00
of/flattree: Merge earlyinit_dt_scan_root() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-11-24 03:27:10 -07:00
of: assume big-endian properties, adding conversions where necessary Properties in the device tree are specified as big-endian. At present, the only platforms to support device trees are also big-endian, so we've been acessing the properties as raw values. We'd like to add device tree support to little-endian platforms too, so add endian conversion to the sites where we access property values in the common of code. Compiled on powerpc (ppc44x_defconfig & ppc64_defconfig) and arm (fdt support only for now). Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-01-30 01:45:26 -07:00
of/flattree: Merge earlyinit_dt_scan_root() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-11-24 03:27:10 -07:00
of: assume big-endian properties, adding conversions where necessary Properties in the device tree are specified as big-endian. At present, the only platforms to support device trees are also big-endian, so we've been acessing the properties as raw values. We'd like to add device tree support to little-endian platforms too, so add endian conversion to the sites where we access property values in the common of code. Compiled on powerpc (ppc44x_defconfig & ppc64_defconfig) and arm (fdt support only for now). Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-01-30 01:45:26 -07:00
of/flattree: Merge earlyinit_dt_scan_root() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-11-24 03:27:10 -07:00
of: assume big-endian properties, adding conversions where necessary Properties in the device tree are specified as big-endian. At present, the only platforms to support device trees are also big-endian, so we've been acessing the properties as raw values. We'd like to add device tree support to little-endian platforms too, so add endian conversion to the sites where we access property values in the common of code. Compiled on powerpc (ppc44x_defconfig & ppc64_defconfig) and arm (fdt support only for now). Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-01-30 01:45:26 -07:00
of/flattree: Merge earlyinit_dt_scan_root() Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-11-24 03:27:10 -07:00
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 23:49:03 -05:00
of/flattree: merge dt_mem_next_cell Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-11-24 03:37:56 -07:00
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 23:49:03 -05:00
of/flattree: merge dt_mem_next_cell Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-11-24 03:37:56 -07:00
of/flattree: merge early_init_dt_scan_memory() common code Merge common code between PowerPC and Microblaze architectures. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Michal Simek <monstr@monstr.eu>
2010-02-01 21:34:14 -07:00
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 23:49:03 -05:00
of/flattree: merge early_init_dt_scan_memory() common code Merge common code between PowerPC and Microblaze architectures. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Michal Simek <monstr@monstr.eu>
2010-02-01 21:34:14 -07:00
of: Handle memory@0 node on PPC32 only In order to deal with an firmware bug on a specific ppc32 platform (longtrail), early_init_dt_scan_memory() looks for a node called memory@0 on all platforms. Restrict this quirk to ppc32 kernels only. Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: Grant Likely <grant.likely@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org
2014-04-17 18:42:01 +01:00
of/flattree: merge early_init_dt_scan_memory() common code Merge common code between PowerPC and Microblaze architectures. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Michal Simek <monstr@monstr.eu>
2010-02-01 21:34:14 -07:00
of/fdt: Remove "reg" data prints from early_init_dt_scan_memory Commit 51975db0b7333 ("of/flattree: merge early_init_dt_scan_memory() common code") consolidated some code from PowerPC (typically big-endian), and ended-up adding a pr_debug() printing reg properties in big-endian (DT native) format, not CPU endian. This debug print suffers from two problems: - we only print 4 "reg" values, while there could be more on typical systems having multiple memory ranges - we print these 4 "reg" values in FDT endianess, that is big-endian, and these values could be confusing for little-endian configurations Since we are already printing the base address and size of the memory regions parsed by early_init_dt_scan_memory() later in a way that is both endian correct, and takes into account arbitrary number of memory banks, just remove that part of the debug print. Suggested-by: Frank Rowand <frowand.list@gmail.com> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
2015-04-12 13:16:26 -07:00
of/flattree: merge early_init_dt_scan_memory() common code Merge common code between PowerPC and Microblaze architectures. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Michal Simek <monstr@monstr.eu>
2010-02-01 21:34:14 -07:00
of/flattree: merge early_init_dt_scan_chosen() Merge common code between PowerPC and Microblaze. This patch splits the arch-specific stuff out into a new function, early_init_dt_scan_chosen_arch(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-10 23:42:21 -07:00
of/fdt: update of_get_flat_dt_prop in prep for libfdt Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 23:49:03 -05:00
of/flattree: merge early_init_dt_scan_chosen() Merge common code between PowerPC and Microblaze. This patch splits the arch-specific stuff out into a new function, early_init_dt_scan_chosen_arch(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-10 23:42:21 -07:00
dt/flattree: explicitly pass command line pointer to early_init_dt_scan_chosen This patch drops the reference to a global 'cmd_line' variable from early_init_dt_scan_chosen, and instead passes the pointer to the command line string via the *data argument. Each architecture does something slightly different with the initial command line, so it makes sense for the architecture to be able to specify the variable name. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-04-29 00:18:16 -06:00
of/flattree: merge early_init_dt_scan_chosen() Merge common code between PowerPC and Microblaze. This patch splits the arch-specific stuff out into a new function, early_init_dt_scan_chosen_arch(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-10 23:42:21 -07:00
Fix common misspellings Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-30 22:57:33 -03:00
of/flattree: merge early_init_dt_scan_chosen() Merge common code between PowerPC and Microblaze. This patch splits the arch-specific stuff out into a new function, early_init_dt_scan_chosen_arch(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-10 23:42:21 -07:00
dt/flattree: explicitly pass command line pointer to early_init_dt_scan_chosen This patch drops the reference to a global 'cmd_line' variable from early_init_dt_scan_chosen, and instead passes the pointer to the command line string via the *data argument. Each architecture does something slightly different with the initial command line, so it makes sense for the architecture to be able to specify the variable name. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-04-29 00:18:16 -06:00
of/flattree: merge early_init_dt_scan_chosen() Merge common code between PowerPC and Microblaze. This patch splits the arch-specific stuff out into a new function, early_init_dt_scan_chosen_arch(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-10 23:42:21 -07:00
of: Change logic to overwrite cmd_line with CONFIG_CMDLINE We used to overwrite with CONFIG_CMDLINE if we found a chosen node but failed to get bootargs out of it or they were empty, unless CONFIG_CMDLINE_FORCE is set. Instead change that to overwrite if "data" is non empty after the bootargs check. It allows arch code to have other mechanisms to retrieve the command line prior to parsing the device-tree. Note: CONFIG_CMDLINE_FORCE case should ideally be handled elsewhere as it won't work as it-is if the device-tree has no /chosen node Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: devicetree-discuss@lists-ozlabs.org CC: Grant Likely <grant.likely@secretlab.ca> Acked-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-19 18:50:15 +00:00
of/flattree: merge early_init_dt_scan_chosen() Merge common code between PowerPC and Microblaze. This patch splits the arch-specific stuff out into a new function, early_init_dt_scan_chosen_arch(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-10 23:42:21 -07:00
of: Change logic to overwrite cmd_line with CONFIG_CMDLINE We used to overwrite with CONFIG_CMDLINE if we found a chosen node but failed to get bootargs out of it or they were empty, unless CONFIG_CMDLINE_FORCE is set. Instead change that to overwrite if "data" is non empty after the bootargs check. It allows arch code to have other mechanisms to retrieve the command line prior to parsing the device-tree. Note: CONFIG_CMDLINE_FORCE case should ideally be handled elsewhere as it won't work as it-is if the device-tree has no /chosen node Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: devicetree-discuss@lists-ozlabs.org CC: Grant Likely <grant.likely@secretlab.ca> Acked-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-19 18:50:15 +00:00
of/flattree: merge early_init_dt_scan_chosen() Merge common code between PowerPC and Microblaze. This patch splits the arch-specific stuff out into a new function, early_init_dt_scan_chosen_arch(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-10 23:42:21 -07:00
dt/flattree: explicitly pass command line pointer to early_init_dt_scan_chosen This patch drops the reference to a global 'cmd_line' variable from early_init_dt_scan_chosen, and instead passes the pointer to the command line string via the *data argument. Each architecture does something slightly different with the initial command line, so it makes sense for the architecture to be able to specify the variable name. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-04-29 00:18:16 -06:00
of/flattree: merge early_init_dt_scan_chosen() Merge common code between PowerPC and Microblaze. This patch splits the arch-specific stuff out into a new function, early_init_dt_scan_chosen_arch(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-10 23:42:21 -07:00
dt/flattree: explicitly pass command line pointer to early_init_dt_scan_chosen This patch drops the reference to a global 'cmd_line' variable from early_init_dt_scan_chosen, and instead passes the pointer to the command line string via the *data argument. Each architecture does something slightly different with the initial command line, so it makes sense for the architecture to be able to specify the variable name. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-04-29 00:18:16 -06:00
of/flattree: merge early_init_dt_scan_chosen() Merge common code between PowerPC and Microblaze. This patch splits the arch-specific stuff out into a new function, early_init_dt_scan_chosen_arch(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-10 23:42:21 -07:00
of: consolidate definition of early_init_dt_alloc_memory_arch() Most architectures use the same implementation. Collapse the common ones into a single weak function that can be overridden. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-28 21:18:32 +01:00
of/fdt: make memblock maximum physical address arch configurable When parsing the memory nodes to populate the memblock memory table, we check against high and low limits and clip any memory that exceeds either one of them. However, for arm64, the high limit of (phys_addr_t)~0 is not very meaningful, since phys_addr_t is 64 bits (i.e., no limit) but there may be other constraints that limit the memory ranges that we can support. So rename MAX_PHYS_ADDR to MAX_MEMBLOCK_ADDR (for clarity) and only define it if the arch does not supply a definition of its own. Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-08-18 10:34:41 +01:00
of: Use proper types for checking memory overflow Commit a67a6ed15513541579d38bcbd127e7be170710e5 (of: Check for phys_addr_t overflows in early_init_dt_add_memory_arch) corrected early_init_dt_add_memory_arch to account for overflows but did so in an unclean way using ULONG_MAX. There is no guarantee that sizeof(unsigned long) == sizeof(phys_addr_t). Check against phys_addr_t instead. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-07-07 17:45:43 -07:00
of: create default early_init_dt_add_memory_arch Create a weak version of early_init_dt_add_memory_arch which uses memblock. This will unify all architectures except ones with custom memory bank structs. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Jonas Bonn <jonas@southpole.se> Acked-by: Grant Likely <grant.likely@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Cc: microblaze-uclinux@itee.uq.edu.au Cc: linux@lists.openrisc.net Cc: devicetree@vger.kernel.org
2013-09-24 22:20:01 -05:00
of: Fix memory block alignment in early_init_dt_add_memory_arch() If a memory block is not aligned to PAGE_SIZE, its base address must be rounded up, not down, and its size must be reduced. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-08-20 17:10:31 +02:00
of: check for size < 0 after rounding in early_init_dt_add_memory_arch Memory regions passed to early_init_dt_add_memory_arch() are rounded to PAGE_SIZE by subtracting the size of the leading fractional page from the 'size' argument. However, size being a u64 type, if its value is sufficiently small, the subtraction wraps around and produces a bogus value, potentially leading to crashes. Fix this by ignoring the memory range in such cases. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-10-29 17:09:32 +01:00
of: Fix memory block alignment in early_init_dt_add_memory_arch() If a memory block is not aligned to PAGE_SIZE, its base address must be rounded up, not down, and its size must be reduced. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-08-20 17:10:31 +02:00
of: create default early_init_dt_add_memory_arch Create a weak version of early_init_dt_add_memory_arch which uses memblock. This will unify all architectures except ones with custom memory bank structs. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Jonas Bonn <jonas@southpole.se> Acked-by: Grant Likely <grant.likely@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Cc: microblaze-uclinux@itee.uq.edu.au Cc: linux@lists.openrisc.net Cc: devicetree@vger.kernel.org
2013-09-24 22:20:01 -05:00
of: Check for phys_addr_t overflows in early_init_dt_add_memory_arch The common early_init_dt_add_memory_arch takes the base and size of a memory region as u64 types. The function never checks if the base and size can actually fit in a phys_addr_t which may be smaller than 64-bits. This may result in incorrect memory being passed to memblock_add if the memory falls outside the range of phys_addr_t. Add range checks for the base and size if phys_addr_t is smaller than u64. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-06-19 20:13:38 -07:00
of/fdt: make memblock maximum physical address arch configurable When parsing the memory nodes to populate the memblock memory table, we check against high and low limits and clip any memory that exceeds either one of them. However, for arm64, the high limit of (phys_addr_t)~0 is not very meaningful, since phys_addr_t is 64 bits (i.e., no limit) but there may be other constraints that limit the memory ranges that we can support. So rename MAX_PHYS_ADDR to MAX_MEMBLOCK_ADDR (for clarity) and only define it if the arch does not supply a definition of its own. Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-08-18 10:34:41 +01:00
of: Use proper types for checking memory overflow Commit a67a6ed15513541579d38bcbd127e7be170710e5 (of: Check for phys_addr_t overflows in early_init_dt_add_memory_arch) corrected early_init_dt_add_memory_arch to account for overflows but did so in an unclean way using ULONG_MAX. There is no guarantee that sizeof(unsigned long) == sizeof(phys_addr_t). Check against phys_addr_t instead. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-07-07 17:45:43 -07:00
of: Check for phys_addr_t overflows in early_init_dt_add_memory_arch The common early_init_dt_add_memory_arch takes the base and size of a memory region as u64 types. The function never checks if the base and size can actually fit in a phys_addr_t which may be smaller than 64-bits. This may result in incorrect memory being passed to memblock_add if the memory falls outside the range of phys_addr_t. Add range checks for the base and size if phys_addr_t is smaller than u64. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-06-19 20:13:38 -07:00
of/fdt: make memblock maximum physical address arch configurable When parsing the memory nodes to populate the memblock memory table, we check against high and low limits and clip any memory that exceeds either one of them. However, for arm64, the high limit of (phys_addr_t)~0 is not very meaningful, since phys_addr_t is 64 bits (i.e., no limit) but there may be other constraints that limit the memory ranges that we can support. So rename MAX_PHYS_ADDR to MAX_MEMBLOCK_ADDR (for clarity) and only define it if the arch does not supply a definition of its own. Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-08-18 10:34:41 +01:00
of/fdt: fix memory range check In cases where board has below memory DT node memory{ device_type = "memory"; reg = <0x80000000 0x80000000>; }; Check on the memory range in fdt.c will always fail because it is comparing MAX_PHYS_ADDR with base + size, in fact it should compare it with base + size - 1. This issue was originally noticed on Qualcomm IFC6410 board. Without this patch kernel shows up noticed unnecessary warnings [ 0.000000] Machine model: Qualcomm APQ8064/IFC6410 [ 0.000000] Ignoring memory range 0xffffffff - 0x100000000 [ 0.000000] cma: Reserved 64 MiB at ab800000 as a result the size get reduced to 0x7fffffff which looks wrong. This patch fixes the check involved in generating this warning and as a result it also fixes the wrong size calculation. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> [grant.likely: adjust new size calculation also] Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-09-23 10:59:09 +01:00
of/fdt: make memblock maximum physical address arch configurable When parsing the memory nodes to populate the memblock memory table, we check against high and low limits and clip any memory that exceeds either one of them. However, for arm64, the high limit of (phys_addr_t)~0 is not very meaningful, since phys_addr_t is 64 bits (i.e., no limit) but there may be other constraints that limit the memory ranges that we can support. So rename MAX_PHYS_ADDR to MAX_MEMBLOCK_ADDR (for clarity) and only define it if the arch does not supply a definition of its own. Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-08-18 10:34:41 +01:00
of: Check for phys_addr_t overflows in early_init_dt_add_memory_arch The common early_init_dt_add_memory_arch takes the base and size of a memory region as u64 types. The function never checks if the base and size can actually fit in a phys_addr_t which may be smaller than 64-bits. This may result in incorrect memory being passed to memblock_add if the memory falls outside the range of phys_addr_t. Add range checks for the base and size if phys_addr_t is smaller than u64. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-06-19 20:13:38 -07:00
of: create default early_init_dt_add_memory_arch Create a weak version of early_init_dt_add_memory_arch which uses memblock. This will unify all architectures except ones with custom memory bank structs. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Jonas Bonn <jonas@southpole.se> Acked-by: Grant Likely <grant.likely@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Cc: microblaze-uclinux@itee.uq.edu.au Cc: linux@lists.openrisc.net Cc: devicetree@vger.kernel.org
2013-09-24 22:20:01 -05:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
of: consolidate definition of early_init_dt_alloc_memory_arch() Most architectures use the same implementation. Collapse the common ones into a single weak function that can be overridden. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-28 21:18:32 +01:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
dt/fdt: add empty versions of early_init_dt_*_memory_arch With the addition of commit 0166dc1 (of: make CONFIG_OF user selectable), architectures which don't enable memblock and don't have their own early_init_dt_*_memory_arch implementations will break when CONFIG_OF is enabled. Really, we should have better separation of CONFIG_OF and CONFIG_OF_EARLY_FLATTREE, but doing that will require quite a bit of shuffling of architecture code. That will have to wait for another day. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Grant Likely <grant.likely@linaro.org>
2015-06-18 20:35:46 -05:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
of: do not use 0x in front of %pa Signed-off-by: Dmitry V. Krivenok <krivenok.dmitry@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
2015-11-30 23:45:48 +03:00
of/fdt: fix phys_addr_t related print size warnings Fix warnings in early_init_dt_reserve_memory_arch when phys_addr_t is 32-bit and memblock is not enabled. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-22 12:50:24 -05:00
drivers: of: add initialization code for static reserved memory This patch adds support for static (defined by 'reg' property) reserved memory regions declared in device tree. Memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks). Typically, all this happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-02-28 14:42:47 +01:00
dt/fdt: add empty versions of early_init_dt_*_memory_arch With the addition of commit 0166dc1 (of: make CONFIG_OF user selectable), architectures which don't enable memblock and don't have their own early_init_dt_*_memory_arch implementations will break when CONFIG_OF is enabled. Really, we should have better separation of CONFIG_OF and CONFIG_OF_EARLY_FLATTREE, but doing that will require quite a bit of shuffling of architecture code. That will have to wait for another day. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Grant Likely <grant.likely@linaro.org>
2015-06-18 20:35:46 -05:00
of: consolidate definition of early_init_dt_alloc_memory_arch() Most architectures use the same implementation. Collapse the common ones into a single weak function that can be overridden. Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-08-28 21:18:32 +01:00
of: Split early_init_dt_scan into two parts Currently, early_init_dt_scan validates the header, sets the boot params, and scans for chosen/memory all in one function. Split this up into two separate functions (validation/setting boot params in one, scanning in another) to allow for additional setup between boot params and scanning the memory. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Tested-by: Andreas Färber <afaerber@suse.de> [glikely: s/early_init_dt_scan_all/early_init_dt_scan_nodes/] Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-07-15 10:03:34 -07:00
of: Introduce common early_init_dt_scan Most architectures scan the all the same items early in the FDT and none are really architecture specific. Create a common early_init_dt_scan to unify the early scan of root, memory, and chosen nodes in the flattened DT. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-26 09:47:40 -05:00
of/fdt: Don't clear initial_boot_params if fdt_check_header() fails If the device tree pointer is NULL, early_init_dt_verify() fails, leaving initial_boot_params unchanged. If the device tree pointer is non-NULL but invalid, early_init_dt_verify() again fails but this time it also clears initial_boot_params. Leave initial_boot_params unchanged if the device tree pointer is invalid. This doesn't fix a bug, but it makes the behavior more consistent and easier to analyze. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-10-29 12:15:00 -06:00
of: Introduce common early_init_dt_scan Most architectures scan the all the same items early in the FDT and none are really architecture specific. Create a common early_init_dt_scan to unify the early scan of root, memory, and chosen nodes in the flattened DT. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-26 09:47:40 -05:00
of/fdt: export fdt blob as /sys/firmware/fdt Create a new /sys entry '/sys/firmware/fdt' to export the FDT blob that was passed to the kernel by the bootloader. This allows userland applications such as kexec to access the raw binary. The fact that this node does not reside under /sys/firmware/device-tree is deliberate: FDT is also used on arm64 UEFI/ACPI systems to communicate just the UEFI and ACPI entry points, but the FDT is never unflattened and used to configure the system. A CRC32 checksum is calculated over the entire FDT blob, and verified at late_initcall time. The sysfs entry is instantiated only if the checksum is valid, i.e., if the FDT blob has not been modified in the mean time. Otherwise, a warning is printed. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-14 18:05:35 +01:00
of: Split early_init_dt_scan into two parts Currently, early_init_dt_scan validates the header, sets the boot params, and scans for chosen/memory all in one function. Split this up into two separate functions (validation/setting boot params in one, scanning in another) to allow for additional setup between boot params and scanning the memory. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Tested-by: Andreas Färber <afaerber@suse.de> [glikely: s/early_init_dt_scan_all/early_init_dt_scan_nodes/] Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-07-15 10:03:34 -07:00
of: Introduce common early_init_dt_scan Most architectures scan the all the same items early in the FDT and none are really architecture specific. Create a common early_init_dt_scan to unify the early scan of root, memory, and chosen nodes in the flattened DT. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-26 09:47:40 -05:00
of: Split early_init_dt_scan into two parts Currently, early_init_dt_scan validates the header, sets the boot params, and scans for chosen/memory all in one function. Split this up into two separate functions (validation/setting boot params in one, scanning in another) to allow for additional setup between boot params and scanning the memory. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Tested-by: Andreas Färber <afaerber@suse.de> [glikely: s/early_init_dt_scan_all/early_init_dt_scan_nodes/] Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-07-15 10:03:34 -07:00
of: Introduce common early_init_dt_scan Most architectures scan the all the same items early in the FDT and none are really architecture specific. Create a common early_init_dt_scan to unify the early scan of root, memory, and chosen nodes in the flattened DT. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-26 09:47:40 -05:00
of: Split early_init_dt_scan into two parts Currently, early_init_dt_scan validates the header, sets the boot params, and scans for chosen/memory all in one function. Split this up into two separate functions (validation/setting boot params in one, scanning in another) to allow for additional setup between boot params and scanning the memory. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Tested-by: Andreas Färber <afaerber@suse.de> [glikely: s/early_init_dt_scan_all/early_init_dt_scan_nodes/] Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-07-15 10:03:34 -07:00
of: Introduce common early_init_dt_scan Most architectures scan the all the same items early in the FDT and none are really architecture specific. Create a common early_init_dt_scan to unify the early scan of root, memory, and chosen nodes in the flattened DT. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-26 09:47:40 -05:00
of/flattree: Merge unflatten_device_tree Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:01 -07:00
of: Eliminate of_allnodes list The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com> Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
2014-10-03 16:28:27 +01:00
dt/flattree: Return virtual address from early_init_dt_alloc_memory_arch() The physical address is never used by the device tree code when allocating memory for unflattening. Change the architecture's alloc hook to return the virutal address instead. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-13 15:36:09 -07:00
of/flattree: Merge unflatten_device_tree Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:01 -07:00
open firmware: "/aliasas" -> "/aliases" Fix "/aliasas" typo in comments, no functional change. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-05-30 05:38:08 -04:00
dt: add of_alias_scan and of_alias_get_id The patch adds function of_alias_scan to populate a global lookup table with the properties of 'aliases' node and function of_alias_get_id for drivers to find alias id from the lookup table. v3: Split out automatic addition of aliases on id lookup so that it can be debated separately from the core functionality. v2: - Add of_chosen/of_aliases populating and of_alias_scan() invocation for OF_PROMTREE. - Add locking - rework parse loop Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-08-15 15:28:14 +08:00
of/flattree: Merge unflatten_device_tree Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23 20:07:01 -07:00
of/flattree: Add Kconfig for EARLY_FLATTREE The device tree code is now in two pieces: some which can be used generically on any platform which selects CONFIG_OF_FLATTREE, and some early which is used at boot time on only a few architectures. This patch segregates the early code so that only those architectures which care about it need compile it. This also means that some of the requirements in the early code (such as a cmd_line variable) that most architectures (e.g. X86) don't provide can be ignored. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> [grant.likely@secretlab.ca: remove extra blank line addition] [grant.likely@secretlab.ca: fixed incorrect #ifdef CONFIG_EARLY_FLATTREE check] [grant.likely@secretlab.ca: Made OF_EARLY_FLATTREE select instead of depend on OF_FLATTREE] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:54:56 -08:00
of: create unflatten_and_copy_device_tree Several architectures using DT support built-in dtb's in the init section. These platforms need to copy the dtb from init since the strings are referenced after unflattening. Every arch has their own copying routine which do the same thing. Create a common function, unflatten_and_copy_device_tree, to copy the dtb when unflattening the dtb. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-26 11:22:45 -05:00
of: Fix NULL dereference in unflatten_and_copy() Check whether initial_boot_params is NULL before dereferencing it in unflatten_and_copy_device_tree() for the case where no device tree is available but the arch can still boot to a minimal usable system without it. In this case also log a warning for when the kernel log buffer is obtainable. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-11-21 13:44:14 +00:00
of/fdt: use libfdt accessors for header data With libfdt support, we can take advantage of helper accessors in libfdt for accessing the FDT header data. This makes the code more readable and makes the FDT blob structure more opaque to the kernel. This also prepares for removing struct boot_param_header completely. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 22:48:01 -05:00
of: Fix NULL dereference in unflatten_and_copy() Check whether initial_boot_params is NULL before dereferencing it in unflatten_and_copy_device_tree() for the case where no device tree is available but the arch can still boot to a minimal usable system without it. In this case also log a warning for when the kernel log buffer is obtainable. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-11-21 13:44:14 +00:00
of/fdt: use libfdt accessors for header data With libfdt support, we can take advantage of helper accessors in libfdt for accessing the FDT header data. This makes the code more readable and makes the FDT blob structure more opaque to the kernel. This also prepares for removing struct boot_param_header completely. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-01 22:48:01 -05:00
of: create unflatten_and_copy_device_tree Several architectures using DT support built-in dtb's in the init section. These platforms need to copy the dtb from init since the strings are referenced after unflattening. Every arch has their own copying routine which do the same thing. Create a common function, unflatten_and_copy_device_tree, to copy the dtb when unflattening the dtb. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
2013-08-26 11:22:45 -05:00
of/fdt: export fdt blob as /sys/firmware/fdt Create a new /sys entry '/sys/firmware/fdt' to export the FDT blob that was passed to the kernel by the bootloader. This allows userland applications such as kexec to access the raw binary. The fact that this node does not reside under /sys/firmware/device-tree is deliberate: FDT is also used on arm64 UEFI/ACPI systems to communicate just the UEFI and ACPI entry points, but the FDT is never unflattened and used to configure the system. A CRC32 checksum is calculated over the entire FDT blob, and verified at late_initcall time. The sysfs entry is instantiated only if the checksum is valid, i.e., if the FDT blob has not been modified in the mean time. Otherwise, a warning is printed. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-14 18:05:35 +01:00
of/fdt: create common debugfs Both powerpc and microblaze have the same FDT blob in debugfs feature. Move this to common location and remove the powerpc and microblaze implementations. This feature could become more useful when FDT overlay support is added. This changes the path of the blob from "$arch/flat-device-tree" to "device-tree/flat-device-tree". Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 16:56:48 -05:00
of/fdt: export fdt blob as /sys/firmware/fdt Create a new /sys entry '/sys/firmware/fdt' to export the FDT blob that was passed to the kernel by the bootloader. This allows userland applications such as kexec to access the raw binary. The fact that this node does not reside under /sys/firmware/device-tree is deliberate: FDT is also used on arm64 UEFI/ACPI systems to communicate just the UEFI and ACPI entry points, but the FDT is never unflattened and used to configure the system. A CRC32 checksum is calculated over the entire FDT blob, and verified at late_initcall time. The sysfs entry is instantiated only if the checksum is valid, i.e., if the FDT blob has not been modified in the mean time. Otherwise, a warning is printed. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-14 18:05:35 +01:00
of/fdt: create common debugfs Both powerpc and microblaze have the same FDT blob in debugfs feature. Move this to common location and remove the powerpc and microblaze implementations. This feature could become more useful when FDT overlay support is added. This changes the path of the blob from "$arch/flat-device-tree" to "device-tree/flat-device-tree". Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 16:56:48 -05:00
of/fdt: export fdt blob as /sys/firmware/fdt Create a new /sys entry '/sys/firmware/fdt' to export the FDT blob that was passed to the kernel by the bootloader. This allows userland applications such as kexec to access the raw binary. The fact that this node does not reside under /sys/firmware/device-tree is deliberate: FDT is also used on arm64 UEFI/ACPI systems to communicate just the UEFI and ACPI entry points, but the FDT is never unflattened and used to configure the system. A CRC32 checksum is calculated over the entire FDT blob, and verified at late_initcall time. The sysfs entry is instantiated only if the checksum is valid, i.e., if the FDT blob has not been modified in the mean time. Otherwise, a warning is printed. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-11-14 18:05:35 +01:00
of/fdt: create common debugfs Both powerpc and microblaze have the same FDT blob in debugfs feature. Move this to common location and remove the powerpc and microblaze implementations. This feature could become more useful when FDT overlay support is added. This changes the path of the blob from "$arch/flat-device-tree" to "device-tree/flat-device-tree". Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-04-02 16:56:48 -05:00
of/flattree: Add Kconfig for EARLY_FLATTREE The device tree code is now in two pieces: some which can be used generically on any platform which selects CONFIG_OF_FLATTREE, and some early which is used at boot time on only a few architectures. This patch segregates the early code so that only those architectures which care about it need compile it. This also means that some of the requirements in the early code (such as a cmd_line variable) that most architectures (e.g. X86) don't provide can be ignored. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> [grant.likely@secretlab.ca: remove extra blank line addition] [grant.likely@secretlab.ca: fixed incorrect #ifdef CONFIG_EARLY_FLATTREE check] [grant.likely@secretlab.ca: Made OF_EARLY_FLATTREE select instead of depend on OF_FLATTREE] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-11-18 15:54:56 -08:00