ps3: FLASH ROM Storage Driver

Add a FLASH ROM Storage Driver for the PS3:
  - Implemented as a misc character device driver
  - Uses a fixed 256 KiB buffer allocated from boot memory as the hypervisor
    requires the writing of aligned 256 KiB blocks

Cc: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/ps3/Kconfig b/arch/powerpc/platforms/ps3/Kconfig
index f6092916ebc8..d4fc74f7bb15 100644
--- a/arch/powerpc/platforms/ps3/Kconfig
+++ b/arch/powerpc/platforms/ps3/Kconfig
@@ -123,4 +123,19 @@ config PS3_ROM
           In general, all users will say Y or M.
           Also make sure to say Y or M to "SCSI CDROM support" later.
 
+config PS3_FLASH
+        tristate "PS3 FLASH ROM Storage Driver"
+        depends on PPC_PS3
+        select PS3_STORAGE
+        help
+          Include support for the PS3 FLASH ROM Storage.
+
+          This support is required to access the PS3 FLASH ROM, which
+          contains the boot loader and some boot options.
+          In general, all users will say Y or M.
+
+          As this driver needs a fixed buffer of 256 KiB of memory, it can
+          be disabled on the kernel command line using "ps3flash=off", to
+          not allocate this fixed buffer.
+
 endmenu