diff options
| author | Dave Estes <cestes@quicinc.com> | 2009-08-11 17:58:49 -0400 |
|---|---|---|
| committer | Daniel Walker <dwalker@codeaurora.org> | 2010-05-03 11:15:05 -0700 |
| commit | e220ba60223a9d63e70217e5b112160df8c21cea (patch) | |
| tree | cdbdcbd9865d10ed0d3b977bc254c1ee0328e460 /arch/arm/mm | |
| parent | ee3c454b8da04815c1884ed85fe89d2d131c0e51 (diff) | |
arm: mm: qsd8x50: Fix incorrect permission faults
Handle incorrectly reported permission faults for qsd8650. On
permission faults, retry MVA to PA conversion. If retry detects
translation fault. Report as translation fault.
Cc: Jamie Lokier <jamie@shareable.org>
Signed-off-by: Dave Estes <cestes@quicinc.com>
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arm/mm/abort-ev7.S | 21 |
2 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 5bd7c89a604..d3022dabb4a 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -572,6 +572,8 @@ config CPU_TLB_V6 config CPU_TLB_V7 bool +config VERIFY_PERMISSION_FAULT + bool endif config CPU_HAS_ASID diff --git a/arch/arm/mm/abort-ev7.S b/arch/arm/mm/abort-ev7.S index 2e6dc040c65..ec88b157d3b 100644 --- a/arch/arm/mm/abort-ev7.S +++ b/arch/arm/mm/abort-ev7.S @@ -29,5 +29,26 @@ ENTRY(v7_early_abort) * V6 code adjusts the returned DFSR. * New designs should not need to patch up faults. */ + +#if defined(CONFIG_VERIFY_PERMISSION_FAULT) + /* + * Detect erroneous permission failures and fix + */ + ldr r3, =0x40d @ On permission fault + and r3, r1, r3 + cmp r3, #0x0d + movne pc, lr + + mcr p15, 0, r0, c7, c8, 0 @ Retranslate FAR + isb + mrc p15, 0, r2, c7, c4, 0 @ Read the PAR + and r3, r2, #0x7b @ On translation fault + cmp r3, #0x0b + movne pc, lr + bic r1, r1, #0xf @ Fix up FSR FS[5:0] + and r2, r2, #0x7e + orr r1, r1, r2, LSR #1 +#endif + mov pc, lr ENDPROC(v7_early_abort) |