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target-arm: Provide syndrome information for MMU faults

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Set up the required syndrome information when we detect an MMU fault.

Signed-off-by: Rob Herring <rob.herring@linaro.org>
[PMM: split out from exception handling patch, tweaked to bring
 in line with how we create other kinds of syndrome information]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
This commit is contained in:
Rob Herring 2014-04-15 19:18:39 +01:00 committed by Peter Maydell
parent d4a2dc675b
commit 00892383c9
2 changed files with 25 additions and 0 deletions
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12
target-arm/helper.c
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@ -3696,6 +3696,8 @@ int arm_cpu_handle_mmu_fault(CPUState *cs, vaddr address,
target_ulong page_size;
int prot;
int ret, is_user;
uint32_t syn;
bool same_el = (arm_current_pl(env) != 0);
is_user = mmu_idx == MMU_USER_IDX;
ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot,
@ -3708,14 +3710,24 @@ int arm_cpu_handle_mmu_fault(CPUState *cs, vaddr address,
return 0;
}
/* AArch64 syndrome does not have an LPAE bit */
syn = ret & ~(1 << 9);
/* For insn and data aborts we assume there is no instruction syndrome
* information; this is always true for exceptions reported to EL1.
*/
if (access_type == 2) {
syn = syn_insn_abort(same_el, 0, 0, syn);
cs->exception_index = EXCP_PREFETCH_ABORT;
} else {
syn = syn_data_abort(same_el, 0, 0, 0, access_type == 1, syn);
if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6)) {
ret |= (1 << 11);
}
cs->exception_index = EXCP_DATA_ABORT;
}
env->exception.syndrome = syn;
env->exception.vaddress = address;
env->exception.fsr = ret;
return 1;

13
target-arm/internals.h
View File

@ -188,4 +188,17 @@ static inline uint32_t syn_cp15_rrt_trap(int cv, int cond, int opc1, int crm,
| (rt2 << 10) | (rt << 5) | (crm << 1) | isread;
}
static inline uint32_t syn_insn_abort(int same_el, int ea, int s1ptw, int fsc)
{
return (EC_INSNABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
| (ea << 9) | (s1ptw << 7) | fsc;
}
static inline uint32_t syn_data_abort(int same_el, int ea, int cm, int s1ptw,
int wnr, int fsc)
{
return (EC_DATAABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
| (ea << 9) | (cm << 8) | (s1ptw << 7) | (wnr << 6) | fsc;
}
#endif