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| author | Andrew Baumann | 2015-12-17 14:37:13 +0100 |
|---|---|---|
| committer | Peter Maydell | 2015-12-17 14:37:13 +0100 |
| commit | 30901475b91ef1f46304404ab4bfe89097f61b96 (patch) | |
| tree | b84b67f2ea28863d0d1c13e2d5060d81efd733bb /target-arm/internals.h | |
| parent | arm: soc-dma: use hwaddr instead of target_ulong in printf (diff) | |
| download | qemu-30901475b91ef1f46304404ab4bfe89097f61b96.tar.gz qemu-30901475b91ef1f46304404ab4bfe89097f61b96.tar.xz qemu-30901475b91ef1f46304404ab4bfe89097f61b96.zip | |
target-arm: raise exception on misaligned LDREX operands
Qemu does not generally perform alignment checks. However, the ARM ARM
requires implementation of alignment exceptions for a number of cases
including LDREX, and Windows-on-ARM relies on this.
This change adds plumbing to enable alignment checks on loads using
MO_ALIGN, a do_unaligned_access hook to raise the exception (data
abort), and uses the new aligned loads in LDREX (for all but
single-byte loads).
Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Message-id: 1449167808-5656-1-git-send-email-Andrew.Baumann@microsoft.com
[PMM: set WnR bits in syndrome and FSR as appropriate]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target-arm/internals.h')
| -rw-r--r-- | target-arm/internals.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target-arm/internals.h b/target-arm/internals.h index 347998c8be..b925aaaa45 100644 --- a/target-arm/internals.h +++ b/target-arm/internals.h @@ -441,4 +441,11 @@ struct ARMMMUFaultInfo { bool arm_tlb_fill(CPUState *cpu, vaddr address, int rw, int mmu_idx, uint32_t *fsr, ARMMMUFaultInfo *fi); +/* Return true if the translation regime is using LPAE format page tables */ +bool arm_regime_using_lpae_format(CPUARMState *env, ARMMMUIdx mmu_idx); + +/* Raise a data fault alignment exception for the specified virtual address */ +void arm_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr, int is_write, + int is_user, uintptr_t retaddr); + #endif |