diff options
Diffstat (limited to 'target/sh4')
| -rw-r--r-- | target/sh4/cpu.h | 13 | ||||
| -rw-r--r-- | target/sh4/translate.c | 8 |
2 files changed, 16 insertions, 5 deletions
diff --git a/target/sh4/cpu.h b/target/sh4/cpu.h index 7969c9af98..ffb91687b8 100644 --- a/target/sh4/cpu.h +++ b/target/sh4/cpu.h @@ -91,9 +91,10 @@ #define FPSCR_RM_NEAREST (0 << 0) #define FPSCR_RM_ZERO (1 << 0) -#define DELAY_SLOT_MASK 0x3 +#define DELAY_SLOT_MASK 0x7 #define DELAY_SLOT (1 << 0) #define DELAY_SLOT_CONDITIONAL (1 << 1) +#define DELAY_SLOT_RTE (1 << 2) typedef struct tlb_t { uint32_t vpn; /* virtual page number */ @@ -264,7 +265,13 @@ void cpu_load_tlb(CPUSH4State * env); #define MMU_USER_IDX 1 static inline int cpu_mmu_index (CPUSH4State *env, bool ifetch) { - return (env->sr & (1u << SR_MD)) == 0 ? 1 : 0; + /* The instruction in a RTE delay slot is fetched in privileged + mode, but executed in user mode. */ + if (ifetch && (env->flags & DELAY_SLOT_RTE)) { + return 0; + } else { + return (env->sr & (1u << SR_MD)) == 0 ? 1 : 0; + } } #include "exec/cpu-all.h" @@ -381,7 +388,7 @@ static inline void cpu_get_tb_cpu_state(CPUSH4State *env, target_ulong *pc, { *pc = env->pc; *cs_base = 0; - *flags = (env->flags & DELAY_SLOT_MASK) /* Bits 0- 1 */ + *flags = (env->flags & DELAY_SLOT_MASK) /* Bits 0- 2 */ | (env->fpscr & (FPSCR_FR | FPSCR_SZ | FPSCR_PR)) /* Bits 19-21 */ | (env->sr & ((1u << SR_MD) | (1u << SR_RB))) /* Bits 29-30 */ | (env->sr & (1u << SR_FD)) /* Bit 15 */ diff --git a/target/sh4/translate.c b/target/sh4/translate.c index aba316f593..8bc132b27b 100644 --- a/target/sh4/translate.c +++ b/target/sh4/translate.c @@ -185,6 +185,9 @@ void superh_cpu_dump_state(CPUState *cs, FILE *f, } else if (env->flags & DELAY_SLOT_CONDITIONAL) { cpu_fprintf(f, "in conditional delay slot (delayed_pc=0x%08x)\n", env->delayed_pc); + } else if (env->flags & DELAY_SLOT_RTE) { + cpu_fprintf(f, "in rte delay slot (delayed_pc=0x%08x)\n", + env->delayed_pc); } } @@ -427,8 +430,9 @@ static void _decode_opc(DisasContext * ctx) CHECK_NOT_DELAY_SLOT gen_write_sr(cpu_ssr); tcg_gen_mov_i32(cpu_delayed_pc, cpu_spc); - ctx->envflags |= DELAY_SLOT; + ctx->envflags |= DELAY_SLOT_RTE; ctx->delayed_pc = (uint32_t) - 1; + ctx->bstate = BS_STOP; return; case 0x0058: /* sets */ tcg_gen_ori_i32(cpu_sr, cpu_sr, (1u << SR_S)); @@ -1804,7 +1808,7 @@ static void decode_opc(DisasContext * ctx) ctx->bstate = BS_BRANCH; if (old_flags & DELAY_SLOT_CONDITIONAL) { gen_delayed_conditional_jump(ctx); - } else if (old_flags & DELAY_SLOT) { + } else { gen_jump(ctx); } |