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X-Received-From: 2a00:1450:4010:c07::241 Subject: [Qemu-devel] [PATCH 04/11] target/xtensa: support MTTCG X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Max Filippov , "Emilio G . Cota" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" - emit TCG barriers for MEMW, EXTW, S32RI and L32AI; - do atomic_cmpxchg_i32 for S32C1I. Cc: Emilio G. Cota Signed-off-by: Max Filippov --- configure | 1 + target/xtensa/cpu.h | 3 +++ target/xtensa/translate.c | 46 +++++++++++++++++++++++++++++++------------= --- 3 files changed, 35 insertions(+), 15 deletions(-) diff --git a/configure b/configure index 39f3a4300163..f83bdeb2a550 100755 --- a/configure +++ b/configure @@ -6813,6 +6813,7 @@ case "$target_name" in ;; xtensa|xtensaeb) TARGET_ARCH=3Dxtensa + mttcg=3D"yes" ;; *) error_exit "Unsupported target CPU" diff --git a/target/xtensa/cpu.h b/target/xtensa/cpu.h index 255cc9e08ed9..d9d3b33a7052 100644 --- a/target/xtensa/cpu.h +++ b/target/xtensa/cpu.h @@ -31,6 +31,9 @@ #define ALIGNED_ONLY #define TARGET_LONG_BITS 32 =20 +/* Xtensa processors have a weak memory model */ +#define TCG_GUEST_DEFAULT_MO (0) + #define CPUArchState struct CPUXtensaState =20 #include "qemu-common.h" diff --git a/target/xtensa/translate.c b/target/xtensa/translate.c index 5969d7c3cd96..c06d30d17960 100644 --- a/target/xtensa/translate.c +++ b/target/xtensa/translate.c @@ -1664,9 +1664,15 @@ static void translate_ldst(DisasContext *dc, const u= int32_t arg[], gen_load_store_alignment(dc, par[0] & MO_SIZE, addr, par[1]); } if (par[2]) { + if (par[1]) { + tcg_gen_mb(TCG_BAR_STRL | TCG_MO_ALL); + } tcg_gen_qemu_st_tl(cpu_R[arg[0]], addr, dc->cring, par[0]); } else { tcg_gen_qemu_ld_tl(cpu_R[arg[0]], addr, dc->cring, par[0]); + if (par[1]) { + tcg_gen_mb(TCG_BAR_LDAQ | TCG_MO_ALL); + } } tcg_temp_free(addr); } @@ -1823,6 +1829,12 @@ static void translate_mac16(DisasContext *dc, const = uint32_t arg[], } } =20 +static void translate_memw(DisasContext *dc, const uint32_t arg[], + const uint32_t par[]) +{ + tcg_gen_mb(TCG_BAR_SC | TCG_MO_ALL); +} + static void translate_minmax(DisasContext *dc, const uint32_t arg[], const uint32_t par[]) { @@ -2193,29 +2205,33 @@ static void translate_setb_expstate(DisasContext *d= c, const uint32_t arg[], tcg_gen_ori_i32(cpu_UR[EXPSTATE], cpu_UR[EXPSTATE], 1u << arg[0]); } =20 +#ifdef CONFIG_USER_ONLY +static void gen_check_atomctl(DisasContext *dc, TCGv_i32 addr) +{ +} +#else +static void gen_check_atomctl(DisasContext *dc, TCGv_i32 addr) +{ + TCGv_i32 tpc =3D tcg_const_i32(dc->pc); + + gen_helper_check_atomctl(cpu_env, tpc, addr); + tcg_temp_free(tpc); +} +#endif + static void translate_s32c1i(DisasContext *dc, const uint32_t arg[], const uint32_t par[]) { if (gen_window_check2(dc, arg[0], arg[1])) { - TCGLabel *label =3D gen_new_label(); TCGv_i32 tmp =3D tcg_temp_local_new_i32(); TCGv_i32 addr =3D tcg_temp_local_new_i32(); - TCGv_i32 tpc; =20 tcg_gen_mov_i32(tmp, cpu_R[arg[0]]); tcg_gen_addi_i32(addr, cpu_R[arg[1]], arg[2]); gen_load_store_alignment(dc, 2, addr, true); - - tpc =3D tcg_const_i32(dc->pc); - gen_helper_check_atomctl(cpu_env, tpc, addr); - tcg_gen_qemu_ld32u(cpu_R[arg[0]], addr, dc->cring); - tcg_gen_brcond_i32(TCG_COND_NE, cpu_R[arg[0]], - cpu_SR[SCOMPARE1], label); - - tcg_gen_qemu_st32(tmp, addr, dc->cring); - - gen_set_label(label); - tcg_temp_free(tpc); + gen_check_atomctl(dc, addr); + tcg_gen_atomic_cmpxchg_i32(cpu_R[arg[0]], addr, cpu_SR[SCOMPARE1], + tmp, dc->cring, MO_32); tcg_temp_free(addr); tcg_temp_free(tmp); } @@ -2828,7 +2844,7 @@ static const XtensaOpcodeOps core_ops[] =3D { .translate =3D translate_extui, }, { .name =3D "extw", - .translate =3D translate_nop, + .translate =3D translate_memw, }, { .name =3D "hwwdtlba", .translate =3D translate_ill, @@ -2945,7 +2961,7 @@ static const XtensaOpcodeOps core_ops[] =3D { .par =3D (const uint32_t[]){TCG_COND_GEU}, }, { .name =3D "memw", - .translate =3D translate_nop, + .translate =3D translate_memw, }, { .name =3D "min", .translate =3D translate_minmax, --=20 2.11.0