diff options
| author | Paul Brook <paul@codesourcery.com> | 2009-07-09 17:45:17 +0100 |
|---|---|---|
| committer | Paul Brook <paul@codesourcery.com> | 2009-07-09 17:45:17 +0100 |
| commit | 590bc601d800d16a77676926898019f7285bd615 (patch) | |
| tree | 85cfd216edb9e8a3068cb4848f238e1fe4fdef58 /target-mips | |
| parent | ff867ddcbd55af7becd2328a454e0158018fb50e (diff) | |
MIPS atomic instructions
Implement MIPS ll/sc instructions using atomic compare+exchange.
Signed-off-by: Paul Brook <paul@codesourcery.com>
Diffstat (limited to 'target-mips')
| -rw-r--r-- | target-mips/cpu.h | 5 | ||||
| -rw-r--r-- | target-mips/translate.c | 83 |
2 files changed, 64 insertions, 24 deletions
diff --git a/target-mips/cpu.h b/target-mips/cpu.h index 6ebb82bcc..bb9a49b98 100644 --- a/target-mips/cpu.h +++ b/target-mips/cpu.h @@ -375,6 +375,9 @@ struct CPUMIPSState { int32_t CP0_Config7; /* XXX: Maybe make LLAddr per-TC? */ target_ulong CP0_LLAddr; + target_ulong llval; + target_ulong llnewval; + target_ulong llreg; target_ulong CP0_WatchLo[8]; int32_t CP0_WatchHi[8]; target_ulong CP0_XContext; @@ -559,6 +562,8 @@ enum { EXCP_LAST = EXCP_CACHE, }; +/* Dummy exception for conditional stores. */ +#define EXCP_SC 0x100 int cpu_mips_exec(CPUMIPSState *s); CPUMIPSState *cpu_mips_init(const char *cpu_model); diff --git a/target-mips/translate.c b/target-mips/translate.c index d316b9d1e..cf467f897 100644 --- a/target-mips/translate.c +++ b/target-mips/translate.c @@ -919,6 +919,7 @@ static inline void op_ldst_##insn(TCGv ret, TCGv arg1, DisasContext *ctx) \ tcg_gen_mov_tl(t0, arg1); \ tcg_gen_qemu_##fname(ret, arg1, ctx->mem_idx); \ tcg_gen_st_tl(t0, cpu_env, offsetof(CPUState, CP0_LLAddr)); \ + tcg_gen_st_tl(ret, cpu_env, offsetof(CPUState, llval)); \ tcg_temp_free(t0); \ } OP_LD_ATOMIC(ll,ld32s); @@ -927,32 +928,66 @@ OP_LD_ATOMIC(lld,ld64); #endif #undef OP_LD_ATOMIC -#define OP_ST_ATOMIC(insn,fname,almask) \ -static inline void op_ldst_##insn(TCGv ret, TCGv arg1, TCGv arg2, DisasContext *ctx) \ -{ \ - TCGv t0 = tcg_temp_new(); \ - int l1 = gen_new_label(); \ - int l2 = gen_new_label(); \ - int l3 = gen_new_label(); \ - \ - tcg_gen_andi_tl(t0, arg2, almask); \ - tcg_gen_brcondi_tl(TCG_COND_EQ, t0, 0, l1); \ - tcg_gen_st_tl(arg2, cpu_env, offsetof(CPUState, CP0_BadVAddr)); \ - generate_exception(ctx, EXCP_AdES); \ - gen_set_label(l1); \ - tcg_gen_ld_tl(t0, cpu_env, offsetof(CPUState, CP0_LLAddr)); \ - tcg_gen_brcond_tl(TCG_COND_NE, arg2, t0, l2); \ - tcg_temp_free(t0); \ - tcg_gen_qemu_##fname(arg1, arg2, ctx->mem_idx); \ - tcg_gen_movi_tl(ret, 1); \ - tcg_gen_br(l3); \ - gen_set_label(l2); \ - tcg_gen_movi_tl(ret, 0); \ - gen_set_label(l3); \ +#ifdef CONFIG_USER_ONLY +#define OP_ST_ATOMIC(insn,fname,ldname,almask) \ +static inline void op_ldst_##insn(TCGv arg1, TCGv arg2, int rt, DisasContext *ctx) \ +{ \ + TCGv t0 = tcg_temp_new(); \ + int l1 = gen_new_label(); \ + int l2 = gen_new_label(); \ + \ + tcg_gen_andi_tl(t0, arg2, almask); \ + tcg_gen_brcondi_tl(TCG_COND_EQ, t0, 0, l1); \ + tcg_gen_st_tl(arg2, cpu_env, offsetof(CPUState, CP0_BadVAddr)); \ + generate_exception(ctx, EXCP_AdES); \ + gen_set_label(l1); \ + tcg_gen_ld_tl(t0, cpu_env, offsetof(CPUState, CP0_LLAddr)); \ + tcg_gen_brcond_tl(TCG_COND_NE, arg2, t0, l2); \ + tcg_gen_movi_tl(t0, rt | ((almask << 3) & 0x20)); \ + tcg_gen_st_tl(t0, cpu_env, offsetof(CPUState, llreg)); \ + tcg_gen_st_tl(arg1, cpu_env, offsetof(CPUState, llnewval)); \ + gen_helper_0i(raise_exception, EXCP_SC); \ + gen_set_label(l2); \ + tcg_gen_movi_tl(t0, 0); \ + gen_store_gpr(t0, rt); \ + tcg_temp_free(t0); \ } -OP_ST_ATOMIC(sc,st32,0x3); +#else +#define OP_ST_ATOMIC(insn,fname,ldname,almask) \ +static inline void op_ldst_##insn(TCGv arg1, TCGv arg2, int rt, DisasContext *ctx) \ +{ \ + TCGv t0 = tcg_temp_new(); \ + TCGv t1 = tcg_temp_new(); \ + int l1 = gen_new_label(); \ + int l2 = gen_new_label(); \ + int l3 = gen_new_label(); \ + \ + tcg_gen_andi_tl(t0, arg2, almask); \ + tcg_gen_brcondi_tl(TCG_COND_EQ, t0, 0, l1); \ + tcg_gen_st_tl(arg2, cpu_env, offsetof(CPUState, CP0_BadVAddr)); \ + generate_exception(ctx, EXCP_AdES); \ + gen_set_label(l1); \ + tcg_gen_ld_tl(t0, cpu_env, offsetof(CPUState, CP0_LLAddr)); \ + tcg_gen_brcond_tl(TCG_COND_NE, arg2, t0, l2); \ + tcg_gen_ld_tl(t0, cpu_env, offsetof(CPUState, llval)); \ + tcg_gen_qemu_##ldname(t1, arg2, ctx->mem_idx); \ + tcg_gen_brcond_tl(TCG_COND_NE, t0, t1, l2); \ + tcg_temp_free(t1); \ + tcg_gen_qemu_##fname(arg1, arg2, ctx->mem_idx); \ + tcg_gen_movi_tl(t0, 1); \ + gen_store_gpr(t0, rt); \ + tcg_gen_br(l3); \ + gen_set_label(l2); \ + tcg_gen_movi_tl(t0, 0); \ + gen_store_gpr(t0, rt); \ + gen_set_label(l3); \ + tcg_temp_free(t0); \ +} +#endif + +OP_ST_ATOMIC(sc,st32,ld32s,0x3); #if defined(TARGET_MIPS64) -OP_ST_ATOMIC(scd,st64,0x7); +OP_ST_ATOMIC(scd,st64,ld64,0x7); #endif #undef OP_ST_ATOMIC |