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target-s390x: add a cpu_mmu_idx_to_asc function

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Use constants to define the MMU indexes, and add a function to do
the reverse conversion of cpu_mmu_index.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Aurelien Jarno 2015-06-03 23:09:53 +02:00 committed by Alexander Graf
parent a1f12d855b
commit 4decd76d71
1 changed files with 22 additions and 3 deletions
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25
target-s390x/cpu.h
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@ -302,15 +302,20 @@ static inline CPU_DoubleU *get_freg(CPUS390XState *cs, int nr)
#define CR0_LOWPROT 0x0000000010000000ULL
#define CR0_EDAT 0x0000000000800000ULL
/* MMU */
#define MMU_PRIMARY_IDX 0
#define MMU_SECONDARY_IDX 1
#define MMU_HOME_IDX 2
static inline int cpu_mmu_index (CPUS390XState *env)
{
switch (env->psw.mask & PSW_MASK_ASC) {
case PSW_ASC_PRIMARY:
return 0;
return MMU_PRIMARY_IDX;
case PSW_ASC_SECONDARY:
return 1;
return MMU_SECONDARY_IDX;
case PSW_ASC_HOME:
return 2;
return MMU_HOME_IDX;
case PSW_ASC_ACCREG:
/* Fallthrough: access register mode is not yet supported */
default:
@ -318,6 +323,20 @@ static inline int cpu_mmu_index (CPUS390XState *env)
}
}
static inline uint64_t cpu_mmu_idx_to_asc(int mmu_idx)
{
switch (mmu_idx) {
case MMU_PRIMARY_IDX:
return PSW_ASC_PRIMARY;
case MMU_SECONDARY_IDX:
return PSW_ASC_SECONDARY;
case MMU_HOME_IDX:
return PSW_ASC_HOME;
default:
abort();
}
}
static inline void cpu_get_tb_cpu_state(CPUS390XState* env, target_ulong *pc,
target_ulong *cs_base, int *flags)
{