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| author |   Catalin Marinas <catalin.marinas@arm.com> | 2009-04-30 17:06:15 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2009-04-30 20:12:59 +0100 |
| commit | 855c551f5b8cc3815d58e1056c1f1e7c461e2d24 (patch) | |
| tree | c2a84666b3a86c3e5cb5272ed42b802f9411ec33 /arch/arm/mm/proc-v7.S | |
| parent | [ARM] 5487/1: ARM errata: Stale prediction on replaced interworking branch (diff) | |
| download | linux-dev-855c551f5b8cc3815d58e1056c1f1e7c461e2d24.tar.xz linux-dev-855c551f5b8cc3815d58e1056c1f1e7c461e2d24.zip | |
[ARM] 5490/1: ARM errata: Processor deadlock when a false hazard is created
This patch adds a workaround for the 458693 Cortex-A8 (r2p0)
erratum. It sets the corresponding bits in the auxiliary control
register so that the PLD instruction becomes a NOP.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm/mm/proc-v7.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S index fc81159596fe..370baa7a0f08 100644 --- a/arch/arm/mm/proc-v7.S +++ b/arch/arm/mm/proc-v7.S @@ -188,6 +188,12 @@ __v7_setup: orr r10, r10, #(1 << 6) @ set IBE to 1 mcr p15, 0, r10, c1, c0, 1 @ write aux control register #endif +#ifdef CONFIG_ARM_ERRATA_458693 + mrc p15, 0, r10, c1, c0, 1 @ read aux control register + orr r10, r10, #(1 << 5) @ set L1NEON to 1 + orr r10, r10, #(1 << 9) @ set PLDNOP to 1 + mcr p15, 0, r10, c1, c0, 1 @ write aux control register +#endif mov r10, #0 #ifdef HARVARD_CACHE mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate |