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[79.180.52.3]) by smtp.gmail.com with ESMTPSA id h17sm25289717wrs.18.2019.12.08.10.40.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 08 Dec 2019 10:40:10 -0800 (PST) From: Michael Rolnik To: qemu-devel@nongnu.org Subject: [PATCH v38 09/22] target/avr: Add instruction translation - MCU Control Instructions Date: Sun, 8 Dec 2019 20:39:09 +0200 Message-Id: <20191208183922.13757-10-mrolnik@gmail.com> X-Mailer: git-send-email 2.17.2 (Apple Git-113) In-Reply-To: <20191208183922.13757-1-mrolnik@gmail.com> References: <20191208183922.13757-1-mrolnik@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::443 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thuth@redhat.com, Michael Rolnik , me@xcancerberox.com.ar, richard.henderson@linaro.org, dovgaluk@ispras.ru, imammedo@redhat.com, philmd@redhat.com, aleksandar.m.mail@gmail.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This includes: - BREAK - NOP - SLEEP - WDR Signed-off-by: Michael Rolnik --- target/avr/translate.c | 174 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 174 insertions(+) diff --git a/target/avr/translate.c b/target/avr/translate.c index d8d8f11933..68025112ff 100644 --- a/target/avr/translate.c +++ b/target/avr/translate.c @@ -369,6 +369,115 @@ static bool trans_ADC(DisasContext *ctx, arg_ADC *a) } +static void gen_jmp_ez(DisasContext *ctx) +{ + tcg_gen_deposit_tl(cpu_pc, cpu_r[30], cpu_r[31], 8, 8); + tcg_gen_or_tl(cpu_pc, cpu_pc, cpu_eind); + ctx->bstate = DISAS_LOOKUP; +} + + +static void gen_jmp_z(DisasContext *ctx) +{ + tcg_gen_deposit_tl(cpu_pc, cpu_r[30], cpu_r[31], 8, 8); + ctx->bstate = DISAS_LOOKUP; +} + + +/* + * in the gen_set_addr & gen_get_addr functions + * H assumed to be in 0x00ff0000 format + * M assumed to be in 0x000000ff format + * L assumed to be in 0x000000ff format + */ +static void gen_set_addr(TCGv addr, TCGv H, TCGv M, TCGv L) +{ + + tcg_gen_andi_tl(L, addr, 0x000000ff); + + tcg_gen_andi_tl(M, addr, 0x0000ff00); + tcg_gen_shri_tl(M, M, 8); + + tcg_gen_andi_tl(H, addr, 0x00ff0000); +} + + +static void gen_set_xaddr(TCGv addr) +{ + gen_set_addr(addr, cpu_rampX, cpu_r[27], cpu_r[26]); +} + + +static void gen_set_yaddr(TCGv addr) +{ + gen_set_addr(addr, cpu_rampY, cpu_r[29], cpu_r[28]); +} + + +static void gen_set_zaddr(TCGv addr) +{ + gen_set_addr(addr, cpu_rampZ, cpu_r[31], cpu_r[30]); +} + + +static TCGv gen_get_addr(TCGv H, TCGv M, TCGv L) +{ + TCGv addr = tcg_temp_new_i32(); + + tcg_gen_deposit_tl(addr, M, H, 8, 8); + tcg_gen_deposit_tl(addr, L, addr, 8, 16); + + return addr; +} + + +static TCGv gen_get_xaddr(void) +{ + return gen_get_addr(cpu_rampX, cpu_r[27], cpu_r[26]); +} + + +static TCGv gen_get_yaddr(void) +{ + return gen_get_addr(cpu_rampY, cpu_r[29], cpu_r[28]); +} + + +static TCGv gen_get_zaddr(void) +{ + return gen_get_addr(cpu_rampZ, cpu_r[31], cpu_r[30]); +} + + +/* + * Load one byte indirect from data space to register and stores an clear + * the bits in data space specified by the register. The instruction can only + * be used towards internal SRAM. The data location is pointed to by the Z (16 + * bits) Pointer Register in the Register File. Memory access is limited to the + * current data segment of 64KB. To access another data segment in devices with + * more than 64KB data space, the RAMPZ in register in the I/O area has to be + * changed. The Z-pointer Register is left unchanged by the operation. This + * instruction is especially suited for clearing status bits stored in SRAM. + */ +static void gen_data_store(DisasContext *ctx, TCGv data, TCGv addr) +{ + if (ctx->tb->flags & TB_FLAGS_FULL_ACCESS) { + gen_helper_fullwr(cpu_env, data, addr); + } else { + tcg_gen_qemu_st8(data, addr, MMU_DATA_IDX); /* mem[addr] = data */ + } +} + +static void gen_data_load(DisasContext *ctx, TCGv data, TCGv addr) +{ + if (ctx->tb->flags & TB_FLAGS_FULL_ACCESS) { + gen_helper_fullrd(data, cpu_env, addr); + } else { + tcg_gen_qemu_ld8u(data, addr, MMU_DATA_IDX); /* data = mem[addr] */ + } +} + + /* * Subtracts an immediate value (0-63) from a register pair and places the * result in the register pair. This instruction operates on the upper four @@ -2516,3 +2625,68 @@ static bool trans_BCLR(DisasContext *ctx, arg_BCLR *a) return true; } + + +/* + * The BREAK instruction is used by the On-chip Debug system, and is + * normally not used in the application software. When the BREAK instruction is + * executed, the AVR CPU is set in the Stopped Mode. This gives the On-chip + * Debugger access to internal resources. If any Lock bits are set, or either + * the JTAGEN or OCDEN Fuses are unprogrammed, the CPU will treat the BREAK + * instruction as a NOP and will not enter the Stopped mode. This instruction + * is not available in all devices. Refer to the device specific instruction + * set summary. + */ +static bool trans_BREAK(DisasContext *ctx, arg_BREAK *a) +{ + if (!avr_have_feature(ctx, AVR_FEATURE_BREAK)) { + return true; + } + +#ifdef BREAKPOINT_ON_BREAK + tcg_gen_movi_tl(cpu_pc, ctx->npc - 1); + gen_helper_debug(cpu_env); + ctx->bstate = DISAS_EXIT; +#else + /* NOP */ +#endif + + return true; +} + + +/* + * This instruction performs a single cycle No Operation. + */ +static bool trans_NOP(DisasContext *ctx, arg_NOP *a) +{ + + /* NOP */ + + return true; +} + + +/* + * This instruction sets the circuit in sleep mode defined by the MCU + * Control Register. + */ +static bool trans_SLEEP(DisasContext *ctx, arg_SLEEP *a) +{ + gen_helper_sleep(cpu_env); + ctx->bstate = DISAS_NORETURN; + return true; +} + + +/* + * This instruction resets the Watchdog Timer. This instruction must be + * executed within a limited time given by the WD prescaler. See the Watchdog + * Timer hardware specification. + */ +static bool trans_WDR(DisasContext *ctx, arg_WDR *a) +{ + gen_helper_wdr(cpu_env); + + return true; +}