diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2009-05-30 14:00:18 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2009-05-30 14:00:18 +0100 |
| commit | 26584853a44c58f3d6ac7360d697a2ddcd1a3efa (patch) | |
| tree | a47156d781c6207d316746a056a81ca82b90d452 /arch/arm/kernel/entry-armv.S | |
| parent | ee8c9571191e588ede9a220ded807e33c4897d91 (diff) | |
Add core support for ARMv6/v7 big-endian
Starting with ARMv6, the CPUs support the BE-8 variant of big-endian
(byte-invariant). This patch adds the core support:
- setting of the BE-8 mode via the CPSR.E register for both kernel and
user threads
- big-endian page table walking
- REV used to rotate instructions read from memory during fault
processing as they are still little-endian format
- Kconfig and Makefile support for BE-8. The --be8 option must be passed
to the final linking stage to convert the instructions to
little-endian
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm/kernel/entry-armv.S')
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index d662a2f1fd85..9d7ce4377c5e 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -482,6 +482,9 @@ __und_usr: subeq r4, r2, #4 @ ARM instr at LR - 4 subne r4, r2, #2 @ Thumb instr at LR - 2 1: ldreqt r0, [r4] +#ifdef CONFIG_CPU_ENDIAN_BE8 + reveq r0, r0 @ little endian instruction +#endif beq call_fpe @ Thumb instruction #if __LINUX_ARM_ARCH__ >= 7 |