From 5b4f1d2db9fb0e24549054ee58c7a7d8f84ddd6e Mon Sep 17 00:00:00 2001 From: "Emilio G. Cota" Date: Fri, 6 Apr 2018 13:42:27 -0400 Subject: [PATCH] target/riscv: convert to TranslatorOps Reviewed-by: Richard Henderson Reviewed-by: Michael Clark Cc: Palmer Dabbelt Cc: Sagar Karandikar Cc: Bastian Koppelmann Signed-off-by: Emilio G. Cota Signed-off-by: Richard Henderson --- target/riscv/translate.c | 148 ++++++++++++++++++++------------------- 1 file changed, 75 insertions(+), 73 deletions(-) diff --git a/target/riscv/translate.c b/target/riscv/translate.c index 68979abfd7..1788668c6f 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -1837,78 +1837,71 @@ static void decode_opc(CPURISCVState *env, DisasContext *ctx) } } -void gen_intermediate_code(CPUState *cs, TranslationBlock *tb) +static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs) { - CPURISCVState *env = cs->env_ptr; - DisasContext ctx; - target_ulong page_start; - int num_insns; - int max_insns; + DisasContext *ctx = container_of(dcbase, DisasContext, base); - ctx.base.pc_first = tb->pc; - ctx.base.pc_next = ctx.base.pc_first; - /* once we have GDB, the rest of the translate.c implementation should be - ready for singlestep */ - ctx.base.singlestep_enabled = cs->singlestep_enabled; - ctx.base.tb = tb; - ctx.base.is_jmp = DISAS_NEXT; + ctx->pc_succ_insn = ctx->base.pc_first; + ctx->flags = ctx->base.tb->flags; + ctx->mem_idx = ctx->base.tb->flags & TB_FLAGS_MMU_MASK; + ctx->frm = -1; /* unknown rounding mode */ +} - page_start = ctx.base.pc_first & TARGET_PAGE_MASK; - ctx.pc_succ_insn = ctx.base.pc_first; - ctx.flags = tb->flags; - ctx.mem_idx = tb->flags & TB_FLAGS_MMU_MASK; - ctx.frm = -1; /* unknown rounding mode */ +static void riscv_tr_tb_start(DisasContextBase *db, CPUState *cpu) +{ +} - num_insns = 0; - max_insns = tb_cflags(ctx.base.tb) & CF_COUNT_MASK; - if (max_insns == 0) { - max_insns = CF_COUNT_MASK; - } - if (max_insns > TCG_MAX_INSNS) { - max_insns = TCG_MAX_INSNS; - } - gen_tb_start(tb); +static void riscv_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu) +{ + DisasContext *ctx = container_of(dcbase, DisasContext, base); - while (ctx.base.is_jmp == DISAS_NEXT) { - tcg_gen_insn_start(ctx.base.pc_next); - num_insns++; + tcg_gen_insn_start(ctx->base.pc_next); +} - if (unlikely(cpu_breakpoint_test(cs, ctx.base.pc_next, BP_ANY))) { - tcg_gen_movi_tl(cpu_pc, ctx.base.pc_next); - ctx.base.is_jmp = DISAS_NORETURN; - gen_exception_debug(); - /* The address covered by the breakpoint must be included in - [tb->pc, tb->pc + tb->size) in order to for it to be - properly cleared -- thus we increment the PC here so that - the logic setting tb->size below does the right thing. */ - ctx.base.pc_next += 4; - goto done_generating; - } +static bool riscv_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu, + const CPUBreakpoint *bp) +{ + DisasContext *ctx = container_of(dcbase, DisasContext, base); - if (num_insns == max_insns && (tb_cflags(ctx.base.tb) & CF_LAST_IO)) { - gen_io_start(); - } + tcg_gen_movi_tl(cpu_pc, ctx->base.pc_next); + ctx->base.is_jmp = DISAS_NORETURN; + gen_exception_debug(); + /* The address covered by the breakpoint must be included in + [tb->pc, tb->pc + tb->size) in order to for it to be + properly cleared -- thus we increment the PC here so that + the logic setting tb->size below does the right thing. */ + ctx->base.pc_next += 4; + return true; +} - ctx.opcode = cpu_ldl_code(env, ctx.base.pc_next); - decode_opc(env, &ctx); - ctx.base.pc_next = ctx.pc_succ_insn; - if (ctx.base.is_jmp == DISAS_NEXT && - (cs->singlestep_enabled || - ctx.base.pc_next - page_start >= TARGET_PAGE_SIZE || - tcg_op_buf_full() || - num_insns >= max_insns || - singlestep)) { - ctx.base.is_jmp = DISAS_TOO_MANY; +static void riscv_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu) +{ + DisasContext *ctx = container_of(dcbase, DisasContext, base); + CPURISCVState *env = cpu->env_ptr; + + ctx->opcode = cpu_ldl_code(env, ctx->base.pc_next); + decode_opc(env, ctx); + ctx->base.pc_next = ctx->pc_succ_insn; + + if (ctx->base.is_jmp == DISAS_NEXT) { + target_ulong page_start; + + page_start = ctx->base.pc_first & TARGET_PAGE_MASK; + if (ctx->base.pc_next - page_start >= TARGET_PAGE_SIZE) { + ctx->base.is_jmp = DISAS_TOO_MANY; } } - if (tb_cflags(ctx.base.tb) & CF_LAST_IO) { - gen_io_end(); - } - switch (ctx.base.is_jmp) { +} + +static void riscv_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu) +{ + DisasContext *ctx = container_of(dcbase, DisasContext, base); + + switch (ctx->base.is_jmp) { case DISAS_TOO_MANY: - tcg_gen_movi_tl(cpu_pc, ctx.base.pc_next); - if (cs->singlestep_enabled) { + tcg_gen_movi_tl(cpu_pc, ctx->base.pc_next); + if (ctx->base.singlestep_enabled) { gen_exception_debug(); } else { tcg_gen_exit_tb(0); @@ -1919,20 +1912,29 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb) default: g_assert_not_reached(); } -done_generating: - gen_tb_end(tb, num_insns); - tb->size = ctx.base.pc_next - ctx.base.pc_first; - tb->icount = num_insns; +} -#ifdef DEBUG_DISAS - if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM) - && qemu_log_in_addr_range(ctx.base.pc_first)) { - qemu_log("IN: %s\n", lookup_symbol(ctx.base.pc_first)); - log_target_disas(cs, ctx.base.pc_first, - ctx.base.pc_next - ctx.base.pc_first); - qemu_log("\n"); - } -#endif +static void riscv_tr_disas_log(const DisasContextBase *dcbase, CPUState *cpu) +{ + qemu_log("IN: %s\n", lookup_symbol(dcbase->pc_first)); + log_target_disas(cpu, dcbase->pc_first, dcbase->tb->size); +} + +static const TranslatorOps riscv_tr_ops = { + .init_disas_context = riscv_tr_init_disas_context, + .tb_start = riscv_tr_tb_start, + .insn_start = riscv_tr_insn_start, + .breakpoint_check = riscv_tr_breakpoint_check, + .translate_insn = riscv_tr_translate_insn, + .tb_stop = riscv_tr_tb_stop, + .disas_log = riscv_tr_disas_log, +}; + +void gen_intermediate_code(CPUState *cs, TranslationBlock *tb) +{ + DisasContext ctx; + + translator_loop(&riscv_tr_ops, &ctx.base, cs, tb); } void riscv_translate_init(void)