diff options
author | Arve Hjønnevåg <arve@android.com> | 2012-11-30 17:05:40 -0800 |
---|---|---|
committer | Arve Hjønnevåg <arve@android.com> | 2013-07-01 15:51:53 -0700 |
commit | 6c6f573eb2aa67ccd56a22fb55953364c644b7cf (patch) | |
tree | a14e7a38fa1b80d71e812aba37be8ae3387bb6dd | |
parent | 4ee50207d6c722da637bb6cd22de0cf8a9f3f365 (diff) |
ARM: decompressor: Flush tlb before swiching domain 0 to client mode
If the bootloader used a page table that is incompatible with domain 0
in client mode, and boots with the mmu on, then swithing domain 0 to
client mode causes a fault if we don't flush the tlb after updating
the page table pointer.
v2: Add ISB before loading dacr.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
-rw-r--r-- | arch/arm/boot/compressed/head.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 032a8d98714..a7cd6738388 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -717,6 +717,8 @@ __armv7_mmu_cache_on: bic r6, r6, #1 << 31 @ 32-bit translation system bic r6, r6, #3 << 0 @ use only ttbr0 mcrne p15, 0, r3, c2, c0, 0 @ load page table pointer + mcrne p15, 0, r0, c8, c7, 0 @ flush I,D TLBs + mcr p15, 0, r0, c7, c5, 4 @ ISB mcrne p15, 0, r1, c3, c0, 0 @ load domain access control mcrne p15, 0, r6, c2, c0, 2 @ load ttb control #endif |