diff options
| author | Richard Henderson <rth@twiddle.net> | 2013-07-26 11:22:21 -1000 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-08-16 11:17:23 -0700 |
| commit | ba96394e20ad033a10eb790fdf2377e2a8892feb (patch) | |
| tree | f0d6cbcdb686eeb8bd5db26443844eb94c1d2ccf /target-alpha | |
| parent | f202039811d8746b0586d2fd5f61de6c8cf68056 (diff) | |
| download | qemu-ba96394e20ad033a10eb790fdf2377e2a8892feb.tar.gz | |
target-alpha: Implement call_pal without an exception
The destination of the call_pal, and the cpu state, is very predictable;
there's no need for exiting the cpu loop.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-alpha')
| -rw-r--r-- | target-alpha/helper.h | 1 | ||||
| -rw-r--r-- | target-alpha/sys_helper.c | 12 | ||||
| -rw-r--r-- | target-alpha/translate.c | 25 |
3 files changed, 35 insertions, 3 deletions
diff --git a/target-alpha/helper.h b/target-alpha/helper.h index 0e425cfc08..5529c17162 100644 --- a/target-alpha/helper.h +++ b/target-alpha/helper.h @@ -99,6 +99,7 @@ DEF_HELPER_FLAGS_2(ieee_input_cmp, TCG_CALL_NO_WG, void, env, i64) #if !defined (CONFIG_USER_ONLY) DEF_HELPER_2(hw_ret, void, env, i64) +DEF_HELPER_3(call_pal, void, env, i64, i64) DEF_HELPER_1(ldl_phys, i64, i64) DEF_HELPER_1(ldq_phys, i64, i64) diff --git a/target-alpha/sys_helper.c b/target-alpha/sys_helper.c index bd94597d36..ce51ed6002 100644 --- a/target-alpha/sys_helper.c +++ b/target-alpha/sys_helper.c @@ -51,6 +51,17 @@ void helper_hw_ret(CPUAlphaState *env, uint64_t a) } } +void helper_call_pal(CPUAlphaState *env, uint64_t pc, uint64_t entry_ofs) +{ + int pal_mode = env->pal_mode; + env->exc_addr = pc | pal_mode; + env->pc = env->palbr + entry_ofs; + if (!pal_mode) { + env->pal_mode = 1; + swap_shadow_regs(env); + } +} + void helper_tbia(CPUAlphaState *env) { tlb_flush(env, 1); @@ -91,4 +102,5 @@ void helper_set_alarm(CPUAlphaState *env, uint64_t expire) qemu_del_timer(cpu->alarm_timer); } } + #endif /* CONFIG_USER_ONLY */ diff --git a/target-alpha/translate.c b/target-alpha/translate.c index 0efd5595e6..59389a2ea0 100644 --- a/target-alpha/translate.c +++ b/target-alpha/translate.c @@ -1521,7 +1521,8 @@ static ExitStatus gen_call_pal(DisasContext *ctx, int palcode) tcg_gen_mov_i64(cpu_unique, cpu_ir[IR_A0]); break; default: - return gen_excp(ctx, EXCP_CALL_PAL, palcode & 0xbf); + palcode &= 0xbf; + goto do_call_pal; } return NO_EXIT; } @@ -1586,13 +1587,31 @@ static ExitStatus gen_call_pal(DisasContext *ctx, int palcode) break; default: - return gen_excp(ctx, EXCP_CALL_PAL, palcode & 0x3f); + palcode &= 0x3f; + goto do_call_pal; } return NO_EXIT; } #endif - return gen_invalid(ctx); + + do_call_pal: +#ifdef CONFIG_USER_ONLY + return gen_excp(ctx, EXCP_CALL_PAL, palcode); +#else + { + TCGv pc = tcg_const_i64(ctx->pc); + TCGv entry = tcg_const_i64(palcode & 0x80 + ? 0x2000 + (palcode - 0x80) * 64 + : 0x1000 + palcode * 64); + + gen_helper_call_pal(cpu_env, pc, entry); + + tcg_temp_free(entry); + tcg_temp_free(pc); + return EXIT_PC_UPDATED; + } +#endif } #ifndef CONFIG_USER_ONLY |