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Mark Nutter 6df10a82f8 [PATCH] spufs: enable SPE problem state MMIO access. 
This patch is layered on top of CONFIG_SPARSEMEM
and is patterned after direct mapping of LS.

This patch allows mmap() of the following regions:
"mfc", which represents the area from [0x3000 - 0x3fff];
"cntl", which represents the area from [0x4000 - 0x4fff];
"signal1" which begins at offset 0x14000; "signal2" which
begins at offset 0x1c000.

The signal1 & signal2 files may be mmap()'d by regular user
processes.  The cntl and mfc file, on the other hand, may
only be accessed if the owning process has CAP_SYS_RAWIO,
because they have the potential to confuse the kernel
with regard to parallel access to the same files with
regular file operations: the kernel always holds a spinlock
when accessing registers in these areas to serialize them,
which can not be guaranteed with user mmaps,

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
History 2006-03-27 14:48:28 +11:00
..
alpha [PATCH] bitops: alpha: use generic bitops 2006-03-26 08:57:11 -08:00
arm [PATCH] bitops: arm: use generic bitops 2006-03-26 08:57:12 -08:00
arm26 [PATCH] bitops: arm26: use generic bitops 2006-03-26 08:57:12 -08:00
cris [PATCH] bitops: cris: use generic bitops 2006-03-26 08:57:12 -08:00
frv [PATCH] bitops: frv: use generic bitops 2006-03-26 08:57:12 -08:00
h8300 [PATCH] bitops: h8300: use generic bitops 2006-03-26 08:57:12 -08:00
i386 [PATCH] bitops: i386: use generic bitops 2006-03-26 08:57:12 -08:00
ia64 [PATCH] bitops: ia64: make partial_page.bitmap an unsigned long 2006-03-26 08:57:15 -08:00
m32r [PATCH] bitops: m32r: use generic bitops 2006-03-26 08:57:12 -08:00
m68k [PATCH] bitops: m68k: use generic bitops 2006-03-26 08:57:12 -08:00
m68knommu [PATCH] bitops: m68knommu: use generic bitops 2006-03-26 08:57:13 -08:00
mips [PATCH] bitops: mips: use generic bitops 2006-03-26 08:57:13 -08:00
parisc [PATCH] bitops: parisc: use generic bitops 2006-03-26 08:57:14 -08:00
powerpc [PATCH] spufs: enable SPE problem state MMIO access. 2006-03-27 14:48:28 +11:00
ppc [PATCH] ppc: fix undefined reference to hweight32 2006-03-26 08:57:13 -08:00
s390 [PATCH] bitops: s390: use generic bitops 2006-03-26 08:57:14 -08:00
sh [PATCH] bitops: sh: use generic bitops 2006-03-26 08:57:14 -08:00
sh64 [PATCH] bitops: sh64: use generic bitops 2006-03-26 08:57:14 -08:00
sparc [PATCH] bitops: sparc: use generic bitops 2006-03-26 08:57:14 -08:00
sparc64 [SPARC64]: Kill duplicate exports of string library functions. 2006-03-26 15:30:29 -08:00
um [PATCH] um: fix undefined reference to hweight32 2006-03-26 08:57:09 -08:00
v850 [PATCH] bitops: v850: use generic bitops 2006-03-26 08:57:14 -08:00
x86_64 [PATCH] bitops: x86_64: use generic bitops 2006-03-26 08:57:14 -08:00
xtensa [PATCH] bitops: xtensa: use generic bitops 2006-03-26 08:57:15 -08:00