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target/hppa: Add privilege to MMU index conversion helpers

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Add two macros which convert privilege level to/from MMU index:

- PRIV_TO_MMU_IDX(priv)
    returns the MMU index for the given privilege level

- MMU_IDX_TO_PRIV(mmu_idx)
    returns the corresponding privilege level for this MMU index

The introduction of those macros make the code easier to read and
will help to improve performance in follow-up patch.

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Helge Deller 2023-08-07 11:32:09 +02:00
parent c400b6ed87
commit c01e5dfb9a
2 changed files with 9 additions and 5 deletions
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5
target/hppa/cpu.h
View file

@ -36,6 +36,9 @@
#define MMU_USER_IDX 3
#define MMU_PHYS_IDX 4
#define PRIV_TO_MMU_IDX(priv) (priv)
#define MMU_IDX_TO_PRIV(mmu_idx) (mmu_idx)
#define TARGET_INSN_START_EXTRA_WORDS 1
/* Hardware exceptions, interrupts, faults, and traps. */
@ -236,7 +239,7 @@ static inline int cpu_mmu_index(CPUHPPAState *env, bool ifetch)
return MMU_USER_IDX;
#else
if (env->psw & (ifetch ? PSW_C : PSW_D)) {
return env->iaoq_f & 3;
return PRIV_TO_MMU_IDX(env->iaoq_f & 3);
}
return MMU_PHYS_IDX; /* mmu disabled */
#endif

9
target/hppa/translate.c
View file

@ -4057,14 +4057,15 @@ static void hppa_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
ctx->tb_flags = ctx->base.tb->flags;
#ifdef CONFIG_USER_ONLY
ctx->privilege = MMU_USER_IDX;
ctx->privilege = MMU_IDX_TO_PRIV(MMU_USER_IDX);
ctx->mmu_idx = MMU_USER_IDX;
ctx->iaoq_f = ctx->base.pc_first | MMU_USER_IDX;
ctx->iaoq_b = ctx->base.tb->cs_base | MMU_USER_IDX;
ctx->iaoq_f = ctx->base.pc_first | ctx->privilege;
ctx->iaoq_b = ctx->base.tb->cs_base | ctx->privilege;
ctx->unalign = (ctx->tb_flags & TB_FLAG_UNALIGN ? MO_UNALN : MO_ALIGN);
#else
ctx->privilege = (ctx->tb_flags >> TB_FLAG_PRIV_SHIFT) & 3;
ctx->mmu_idx = (ctx->tb_flags & PSW_D ? ctx->privilege : MMU_PHYS_IDX);
ctx->mmu_idx = (ctx->tb_flags & PSW_D ?
PRIV_TO_MMU_IDX(ctx->privilege) : MMU_PHYS_IDX);
/* Recover the IAOQ values from the GVA + PRIV. */
uint64_t cs_base = ctx->base.tb->cs_base;