Commit 3db010c3 authored by Richard Henderson's avatar Richard Henderson
Browse files

target/sparc: Restore ldstub of odd asis 



Fixes the booting of ss20 roms.

Cc: qemu-stable@nongnu.org
Reported-by: default avatarMichael Russo <mike@papersolve.com>
Tested-by: default avatarMark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent b28f9db1

target/sparc/translate.c

+25 −2
Original line number Diff line number Diff line
@@ -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);

        break;

    default:

        /* ??? Should be DAE_invalid_asi.  */

        gen_exception(dc, TT_DATA_ACCESS);

        /* ??? In theory, this should be raise DAE_invalid_asi.

           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;

    }

}