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target/microblaze: Cache mem_index in DisasContext 

Ideally, nothing outside the top-level of translation even
has access to env.  Cache the value in init_disas_context.

Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-08-19 16:38:07 -07:00
parent 2c32179f39
commit 287b1defeb
1 changed files with 5 additions and 4 deletions
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9
target/microblaze/translate.c
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@ -73,6 +73,7 @@ typedef struct DisasContext {
unsigned int delayed_branch;
unsigned int tb_flags, synced_flags; /* tb dependent flags. */
unsigned int clear_imm;
int mem_index;
#define JMP_NOJMP 0
#define JMP_DIRECT 1
@ -175,8 +176,7 @@ static bool trap_illegal(DisasContext *dc, bool cond)
*/
static bool trap_userspace(DisasContext *dc, bool cond)
{
int mem_index = cpu_mmu_index(&dc->cpu->env, false);
bool cond_user = cond && mem_index == MMU_USER_IDX;
bool cond_user = cond && dc->mem_index == MMU_USER_IDX;
if (cond_user && (dc->tb_flags & MSR_EE)) {
gen_raise_hw_excp(dc, ESR_EC_PRIVINSN);
@ -968,7 +968,7 @@ static void dec_load(DisasContext *dc)
TCGv addr;
unsigned int size;
bool rev = false, ex = false, ea = false;
int mem_index = cpu_mmu_index(&dc->cpu->env, false);
int mem_index = dc->mem_index;
MemOp mop;
mop = dc->opcode & 3;
@ -1077,7 +1077,7 @@ static void dec_store(DisasContext *dc)
TCGLabel *swx_skip = NULL;
unsigned int size;
bool rev = false, ex = false, ea = false;
int mem_index = cpu_mmu_index(&dc->cpu->env, false);
int mem_index = dc->mem_index;
MemOp mop;
mop = dc->opcode & 3;
@ -1540,6 +1540,7 @@ static void mb_tr_init_disas_context(DisasContextBase *dcb, CPUState *cs)
dc->ext_imm = dc->base.tb->cs_base;
dc->r0 = NULL;
dc->r0_set = false;
dc->mem_index = cpu_mmu_index(&cpu->env, false);
bound = -(dc->base.pc_first | TARGET_PAGE_MASK) / 4;
dc->base.max_insns = MIN(dc->base.max_insns, bound);