mtd: afs: add v2 partition parsing

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The AFS v2 partition type appear in later ARM reference designs
such as RealView, Versatile Express and the 64bit Juno Development
Platform.

The image informations is padded with a 32bit word (4 bytes) on
the 32bit platforms and a 64bit word (8 bytes) on the 64bit
platforms. The boot monitor source code gives at hand that this
is because the first entry in the struct mapped over the image
information is a "next" pointer for a linked list, filled in
by firmware after reading in the info block, and always zero
in the flash. We adjust padding by checking what padding gives
the right checksum.

This was tested on:
- Integrator/AP (v1 partitions)
- RealView PB11MPCore (v2 32bit partitions)
- Juno Development System (v2 64bit partitions)

All systems display the images in flash very nicely as separate
partitions, e.g on Juno:

4 afs partitions found on MTD device 8000000.flash
Creating 4 MTD partitions on "8000000.flash":
0x000000040000-0x0000000c0000 : "fip"
0x000000ec0000-0x0000018c0000 : "Image"
0x000000f00000-0x000000f40000 : "juno"
0x000003ec0000-0x000003f00000 : "bl1"

Cc: Ryan Harkin <ryan.harkin@linaro.org>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Richard Weinberger <richard@nod.at>

...

This commit is contained in:

Linus Walleij 2019-05-06 21:55:51 +02:00 • committed by Richard Weinberger

parent 32e68bea93

commit b7cf5e2830

1 changed files with 157 additions and 1 deletions

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drivers/mtd/parsers/afs.c

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