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target/arm: Split out rebuild_hflags_m32

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Create a function to compute the values of the TBFLAG_A32 bits
that will be cached, and are used by M-profile.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20191023150057.25731-6-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2019-10-23 11:00:38 -04:00 committed by Peter Maydell
parent 8061a64910
commit 6e33ced563
1 changed files with 30 additions and 15 deletions
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45
target/arm/helper.c
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@ -11083,6 +11083,29 @@ static uint32_t rebuild_hflags_common_32(CPUARMState *env, int fp_el,
return rebuild_hflags_common(env, fp_el, mmu_idx, flags);
}
static uint32_t rebuild_hflags_m32(CPUARMState *env, int fp_el,
ARMMMUIdx mmu_idx)
{
uint32_t flags = 0;
if (arm_v7m_is_handler_mode(env)) {
flags = FIELD_DP32(flags, TBFLAG_A32, HANDLER, 1);
}
/*
* v8M always applies stack limit checks unless CCR.STKOFHFNMIGN
* is suppressing them because the requested execution priority
* is less than 0.
*/
if (arm_feature(env, ARM_FEATURE_V8) &&
!((mmu_idx & ARM_MMU_IDX_M_NEGPRI) &&
(env->v7m.ccr[env->v7m.secure] & R_V7M_CCR_STKOFHFNMIGN_MASK))) {
flags = FIELD_DP32(flags, TBFLAG_A32, STACKCHECK, 1);
}
return rebuild_hflags_common_32(env, fp_el, mmu_idx, flags);
}
static uint32_t rebuild_hflags_a64(CPUARMState *env, int el, int fp_el,
ARMMMUIdx mmu_idx)
{
@ -11168,7 +11191,13 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
}
} else {
*pc = env->regs[15];
flags = rebuild_hflags_common_32(env, fp_el, mmu_idx, 0);
if (arm_feature(env, ARM_FEATURE_M)) {
flags = rebuild_hflags_m32(env, fp_el, mmu_idx);
} else {
flags = rebuild_hflags_common_32(env, fp_el, mmu_idx, 0);
}
flags = FIELD_DP32(flags, TBFLAG_A32, THUMB, env->thumb);
flags = FIELD_DP32(flags, TBFLAG_A32, VECLEN, env->vfp.vec_len);
flags = FIELD_DP32(flags, TBFLAG_A32, VECSTRIDE, env->vfp.vec_stride);
@ -11204,20 +11233,6 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
}
}
if (arm_v7m_is_handler_mode(env)) {
flags = FIELD_DP32(flags, TBFLAG_A32, HANDLER, 1);
}
/* v8M always applies stack limit checks unless CCR.STKOFHFNMIGN is
* suppressing them because the requested execution priority is less than 0.
*/
if (arm_feature(env, ARM_FEATURE_V8) &&
arm_feature(env, ARM_FEATURE_M) &&
!((mmu_idx & ARM_MMU_IDX_M_NEGPRI) &&
(env->v7m.ccr[env->v7m.secure] & R_V7M_CCR_STKOFHFNMIGN_MASK))) {
flags = FIELD_DP32(flags, TBFLAG_A32, STACKCHECK, 1);
}
if (arm_feature(env, ARM_FEATURE_M_SECURITY) &&
FIELD_EX32(env->v7m.fpccr[M_REG_S], V7M_FPCCR, S) != env->v7m.secure) {
flags = FIELD_DP32(flags, TBFLAG_A32, FPCCR_S_WRONG, 1);