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target/sparc: Restore ldstub of odd asis 

Fixes the booting of ss20 roms.

Cc: qemu-stable@nongnu.org
Reported-by: Michael Russo <mike@papersolve.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2017-01-27 00:08:21 -08:00
parent b28f9db1a7
commit 3db010c339
1 changed files with 25 additions and 2 deletions
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27
target/sparc/translate.c
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@ -2448,8 +2448,31 @@ static void gen_ldstub_asi(DisasContext *dc, TCGv dst, TCGv addr, int insn)
gen_ldstub(dc, dst, addr, da.mem_idx); gen_ldstub(dc, dst, addr, da.mem_idx);
break; break;
default: default:
/* ??? Should be DAE_invalid_asi. */ /* ??? In theory, this should be raise DAE_invalid_asi.
gen_exception(dc, TT_DATA_ACCESS); But the SS-20 roms do ldstuba [%l0] #ASI_M_CTL, %o1. */
if (parallel_cpus) {
gen_helper_exit_atomic(cpu_env);
} else {
TCGv_i32 r_asi = tcg_const_i32(da.asi);
TCGv_i32 r_mop = tcg_const_i32(MO_UB);
TCGv_i64 s64, t64;
save_state(dc);
t64 = tcg_temp_new_i64();
gen_helper_ld_asi(t64, cpu_env, addr, r_asi, r_mop);
s64 = tcg_const_i64(0xff);
gen_helper_st_asi(cpu_env, addr, s64, r_asi, r_mop);
tcg_temp_free_i64(s64);
tcg_temp_free_i32(r_mop);
tcg_temp_free_i32(r_asi);
tcg_gen_trunc_i64_tl(dst, t64);
tcg_temp_free_i64(t64);
/* End the TB. */
dc->npc = DYNAMIC_PC;
}
break; break;
} }
} }