diff options
| author | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2015-11-08 17:11:59 +0000 |
|---|---|---|
| committer | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2016-01-07 12:21:06 +0000 |
| commit | c9a464420d7eb67dace1f630554245360b4c7c5b (patch) | |
| tree | d8d1c674889a55840a760c71f63758d1435425cc | |
| parent | bf43330aa418908f7a5e2acda28ac1a8ed0d8ad6 (diff) | |
target-sparc: implement NPT timer bit
If the NPT bit is set in the timer register, all non-supervisor read accesses
to the register should fail with a privilege exception.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-By: Artyom Tarasenko <atar4qemu@gmail.com>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
| -rw-r--r-- | target-sparc/helper.c | 10 | ||||
| -rw-r--r-- | target-sparc/helper.h | 2 | ||||
| -rw-r--r-- | target-sparc/translate.c | 18 |
3 files changed, 24 insertions, 6 deletions
diff --git a/target-sparc/helper.c b/target-sparc/helper.c index 4850c7cec7..6600834d4a 100644 --- a/target-sparc/helper.c +++ b/target-sparc/helper.c @@ -51,10 +51,16 @@ void helper_tick_set_count(void *opaque, uint64_t count) #endif } -uint64_t helper_tick_get_count(void *opaque) +uint64_t helper_tick_get_count(CPUSPARCState *env, void *opaque, int mem_idx) { #if !defined(CONFIG_USER_ONLY) - return cpu_tick_get_count(opaque); + CPUTimer *timer = opaque; + + if (timer->npt && mem_idx < MMU_KERNEL_IDX) { + helper_raise_exception(env, TT_PRIV_INSN); + } + + return cpu_tick_get_count(timer); #else return 0; #endif diff --git a/target-sparc/helper.h b/target-sparc/helper.h index 1ad23e8dbc..4374f0dd23 100644 --- a/target-sparc/helper.h +++ b/target-sparc/helper.h @@ -25,7 +25,7 @@ DEF_HELPER_2(set_softint, void, env, i64) DEF_HELPER_2(clear_softint, void, env, i64) DEF_HELPER_2(write_softint, void, env, i64) DEF_HELPER_2(tick_set_count, void, ptr, i64) -DEF_HELPER_1(tick_get_count, i64, ptr) +DEF_HELPER_3(tick_get_count, i64, env, ptr, int) DEF_HELPER_2(tick_set_limit, void, ptr, i64) #endif #if !defined(CONFIG_USER_ONLY) || defined(TARGET_SPARC64) diff --git a/target-sparc/translate.c b/target-sparc/translate.c index 63440dd792..f99ceed834 100644 --- a/target-sparc/translate.c +++ b/target-sparc/translate.c @@ -2708,12 +2708,16 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn) case 0x4: /* V9 rdtick */ { TCGv_ptr r_tickptr; + TCGv_i32 r_const; r_tickptr = tcg_temp_new_ptr(); + r_const = tcg_const_i32(dc->mem_idx); tcg_gen_ld_ptr(r_tickptr, cpu_env, offsetof(CPUSPARCState, tick)); - gen_helper_tick_get_count(cpu_dst, r_tickptr); + gen_helper_tick_get_count(cpu_dst, cpu_env, r_tickptr, + r_const); tcg_temp_free_ptr(r_tickptr); + tcg_temp_free_i32(r_const); gen_store_gpr(dc, rd, cpu_dst); } break; @@ -2750,12 +2754,16 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn) case 0x18: /* System tick */ { TCGv_ptr r_tickptr; + TCGv_i32 r_const; r_tickptr = tcg_temp_new_ptr(); + r_const = tcg_const_i32(dc->mem_idx); tcg_gen_ld_ptr(r_tickptr, cpu_env, offsetof(CPUSPARCState, stick)); - gen_helper_tick_get_count(cpu_dst, r_tickptr); + gen_helper_tick_get_count(cpu_dst, cpu_env, r_tickptr, + r_const); tcg_temp_free_ptr(r_tickptr); + tcg_temp_free_i32(r_const); gen_store_gpr(dc, rd, cpu_dst); } break; @@ -2863,12 +2871,16 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn) case 4: // tick { TCGv_ptr r_tickptr; + TCGv_i32 r_const; r_tickptr = tcg_temp_new_ptr(); + r_const = tcg_const_i32(dc->mem_idx); tcg_gen_ld_ptr(r_tickptr, cpu_env, offsetof(CPUSPARCState, tick)); - gen_helper_tick_get_count(cpu_tmp0, r_tickptr); + gen_helper_tick_get_count(cpu_tmp0, cpu_env, + r_tickptr, r_const); tcg_temp_free_ptr(r_tickptr); + tcg_temp_free_i32(r_const); } break; case 5: // tba |