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target-alpha: Implement WAIT IPR.

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Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2011-04-21 18:58:09 -07:00
parent 80bb2ff770
commit bc24270e64
1 changed files with 21 additions and 10 deletions
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31
target-alpha/translate.c
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@ -1617,9 +1617,10 @@ static void gen_mfpr(int ra, int regno)
} }
} }
static void gen_mtpr(int rb, int regno) static ExitStatus gen_mtpr(DisasContext *ctx, int rb, int regno)
{ {
TCGv tmp; TCGv tmp;
int data;
if (rb == 31) { if (rb == 31) {
tmp = tcg_const_i64(0); tmp = tcg_const_i64(0);
@ -1627,19 +1628,27 @@ static void gen_mtpr(int rb, int regno)
tmp = cpu_ir[rb]; tmp = cpu_ir[rb];
} }
/* These two register numbers perform a TLB cache flush. Thankfully we switch (regno) {
can only do this inside PALmode, which means that the current basic case 255:
block cannot be affected by the change in mappings. */
if (regno == 255) {
/* TBIA */ /* TBIA */
gen_helper_tbia(); gen_helper_tbia();
} else if (regno == 254) { break;
case 254:
/* TBIS */ /* TBIS */
gen_helper_tbis(tmp); gen_helper_tbis(tmp);
} else { break;
case 253:
/* WAIT */
tmp = tcg_const_i64(1);
tcg_gen_st32_i64(tmp, cpu_env, offsetof(CPUState, halted));
return gen_excp(ctx, EXCP_HLT, 0);
default:
/* The basic registers are data only, and unknown registers /* The basic registers are data only, and unknown registers
are read-zero, write-ignore. */ are read-zero, write-ignore. */
int data = cpu_pr_data(regno); data = cpu_pr_data(regno);
if (data != 0) { if (data != 0) {
if (data & PR_BYTE) { if (data & PR_BYTE) {
tcg_gen_st8_i64(tmp, cpu_env, data & ~PR_BYTE); tcg_gen_st8_i64(tmp, cpu_env, data & ~PR_BYTE);
@ -1649,11 +1658,14 @@ static void gen_mtpr(int rb, int regno)
tcg_gen_st_i64(tmp, cpu_env, data); tcg_gen_st_i64(tmp, cpu_env, data);
} }
} }
break;
} }
if (rb == 31) { if (rb == 31) {
tcg_temp_free(tmp); tcg_temp_free(tmp);
} }
return NO_EXIT;
} }
#endif /* !USER_ONLY*/ #endif /* !USER_ONLY*/
@ -3061,8 +3073,7 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn)
/* HW_MTPR (PALcode) */ /* HW_MTPR (PALcode) */
#ifndef CONFIG_USER_ONLY #ifndef CONFIG_USER_ONLY
if (ctx->tb->flags & TB_FLAGS_PAL_MODE) { if (ctx->tb->flags & TB_FLAGS_PAL_MODE) {
gen_mtpr(rb, insn & 0xffff); return gen_mtpr(ctx, rb, insn & 0xffff);
break;
} }
#endif #endif
goto invalid_opc; goto invalid_opc;