diff options
| -rw-r--r-- | target-mips/op.c | 10 | ||||
| -rw-r--r-- | target-mips/translate.c | 22 |
2 files changed, 30 insertions, 2 deletions
diff --git a/target-mips/op.c b/target-mips/op.c index 1188e82846..e119765b3c 100644 --- a/target-mips/op.c +++ b/target-mips/op.c @@ -1001,6 +1001,16 @@ void op_jnz_T2 (void) RETURN(); } +void op_flush_icache_range(void) { + CALL_FROM_TB2(tlb_flush_page, env, T0 + T1); + RETURN(); +} + +void op_flush_icache_all(void) { + CALL_FROM_TB1(tb_flush, env); + RETURN(); +} + /* CP0 functions */ void op_mfc0_index (void) { diff --git a/target-mips/translate.c b/target-mips/translate.c index 410560c286..66e9def854 100644 --- a/target-mips/translate.c +++ b/target-mips/translate.c @@ -5648,8 +5648,26 @@ static void decode_opc (CPUState *env, DisasContext *ctx) gen_ldst(ctx, op, rt, rs, imm); break; case OPC_CACHE: - /* Treat as a noop */ - break; + /* FIXME: This works around self-modifying code, but only + if the guest OS handles it properly, and if there's no + such code executed in uncached space. */ + if (!(rt & 0x3)) + switch ((rt >> 2) & 0x7) { + case 4: + GEN_LOAD_REG_TN(T0, rs); + GEN_LOAD_IMM_TN(T1, imm); + gen_op_flush_icache_range(); + break; + case 2: + case 1: + case 0: + /* Can be very inefficient. */ + gen_op_flush_icache_all(); + break; + default: + break; + } + break; case OPC_PREF: /* Treat as a noop */ break; |