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| author |   Matthew Leach <matthew.leach@arm.com> | 2013-10-11 14:52:17 +0100 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2013-10-25 15:59:41 +0100 |
| commit | 9cf71728931a4073b9e3a4bcbf9dada86bc98370 (patch) | |
| tree | 3f691894d37da543d5077307c26e3d450952974e /arch/arm64/mm | |
| parent | arm64: head: create a new function for setting the boot_cpu_mode flag (diff) | |
| download | linux-dev-9cf71728931a4073b9e3a4bcbf9dada86bc98370.tar.xz linux-dev-9cf71728931a4073b9e3a4bcbf9dada86bc98370.zip | |
arm64: big-endian: set correct endianess on kernel entry
The endianness of memory accesses at EL2 and EL1 are configured by
SCTLR_EL2.EE and SCTLR_EL1.EE respectively. When the kernel is booted,
the state of SCTLR_EL{2,1}.EE is unknown, and thus the kernel must
ensure that they are set before performing any memory accesses.
This patch ensures that SCTLR_EL{2,1} are configured appropriately at
boot for kernels of either endianness.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Matthew Leach <matthew.leach@arm.com>
[catalin.marinas@arm.com: fix SCTLR_EL1.E0E bit setting in head.S]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/mm')
| -rw-r--r-- | arch/arm64/mm/proc.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index b1b31bbc967b..421b99fd635d 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -162,9 +162,9 @@ ENDPROC(__cpu_setup) * CE0 XWHW CZ ME TEEA S * .... .IEE .... NEAI TE.I ..AD DEN0 ACAM * 0011 0... 1101 ..0. ..0. 10.. .... .... < hardware reserved - * .... .100 .... 01.1 11.1 ..01 0001 1101 < software settings + * .... .1.. .... 01.1 11.1 ..01 0001 1101 < software settings */ .type crval, #object crval: - .word 0x030802e2 // clear + .word 0x000802e2 // clear .word 0x0405d11d // set |