/* * RISC-V emulation for qemu: main translation routines. * * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2 or later, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program. If not, see . */ #include "qemu/osdep.h" #include "qemu/log.h" #include "cpu.h" #include "tcg/tcg-op.h" #include "disas/disas.h" #include "exec/cpu_ldst.h" #include "exec/exec-all.h" #include "exec/helper-proto.h" #include "exec/helper-gen.h" #include "exec/translator.h" #include "exec/log.h" #include "instmap.h" #include "internals.h" /* global register indices */ static TCGv cpu_gpr[32], cpu_gprh[32], cpu_pc, cpu_vl, cpu_vstart; static TCGv_i64 cpu_fpr[32]; /* assume F and D extensions */ static TCGv load_res; static TCGv load_val; /* globals for PM CSRs */ static TCGv pm_mask[4]; static TCGv pm_base[4]; #include "exec/gen-icount.h" /* * If an operation is being performed on less than TARGET_LONG_BITS, * it may require the inputs to be sign- or zero-extended; which will * depend on the exact operation being performed. */ typedef enum { EXT_NONE, EXT_SIGN, EXT_ZERO, } DisasExtend; typedef struct DisasContext { DisasContextBase base; /* pc_succ_insn points to the instruction following base.pc_next */ target_ulong pc_succ_insn; target_ulong priv_ver; RISCVMXL misa_mxl_max; RISCVMXL xl; uint32_t misa_ext; uint32_t opcode; uint32_t mstatus_fs; uint32_t mstatus_vs; uint32_t mstatus_hs_fs; uint32_t mstatus_hs_vs; uint32_t mem_idx; /* Remember the rounding mode encoded in the previous fp instruction, which we have already installed into env->fp_status. Or -1 for no previous fp instruction. Note that we exit the TB when writing to any system register, which includes CSR_FRM, so we do not have to reset this known value. */ int frm; RISCVMXL ol; bool virt_enabled; bool ext_ifencei; bool ext_zfh; bool ext_zfhmin; bool hlsx; /* vector extension */ bool vill; /* * Encode LMUL to lmul as follows: * LMUL vlmul lmul * 1 000 0 * 2 001 1 * 4 010 2 * 8 011 3 * - 100 - * 1/8 101 -3 * 1/4 110 -2 * 1/2 111 -1 */ int8_t lmul; uint8_t sew; uint16_t vlen; uint16_t elen; target_ulong vstart; bool vl_eq_vlmax; uint8_t ntemp; CPUState *cs; TCGv zero; /* Space for 3 operands plus 1 extra for address computation. */ TCGv temp[4]; /* PointerMasking extension */ bool pm_enabled; TCGv pm_mask; TCGv pm_base; } DisasContext; static inline bool has_ext(DisasContext *ctx, uint32_t ext) { return ctx->misa_ext & ext; } #ifdef TARGET_RISCV32 #define get_xl(ctx) MXL_RV32 #elif defined(CONFIG_USER_ONLY) #define get_xl(ctx) MXL_RV64 #else #define get_xl(ctx) ((ctx)->xl) #endif /* The word size for this machine mode. */ static inline int __attribute__((unused)) get_xlen(DisasContext *ctx) { return 16 << get_xl(ctx); } /* The operation length, as opposed to the xlen. */ #ifdef TARGET_RISCV32 #define get_ol(ctx) MXL_RV32 #else #define get_ol(ctx) ((ctx)->ol) #endif static inline int get_olen(DisasContext *ctx) { return 16 << get_ol(ctx); } /* The maximum register length */ #ifdef TARGET_RISCV32 #define get_xl_max(ctx) MXL_RV32 #else #define get_xl_max(ctx) ((ctx)->misa_mxl_max) #endif /* * RISC-V requires NaN-boxing of narrower width floating point values. * This applies when a 32-bit value is assigned to a 64-bit FP register. * For consistency and simplicity, we nanbox results even when the RVD * extension is not present. */ static void gen_nanbox_s(TCGv_i64 out, TCGv_i64 in) { tcg_gen_ori_i64(out, in, MAKE_64BIT_MASK(32, 32)); } static void gen_nanbox_h(TCGv_i64 out, TCGv_i64 in) { tcg_gen_ori_i64(out, in, MAKE_64BIT_MASK(16, 48)); } /* * A narrow n-bit operation, where n < FLEN, checks that input operands * are correctly Nan-boxed, i.e., all upper FLEN - n bits are 1. * If so, the least-significant bits of the input are used, otherwise the * input value is treated as an n-bit canonical NaN (v2.2 section 9.2). * * Here, the result is always nan-boxed, even the canonical nan. */ static void gen_check_nanbox_h(TCGv_i64 out, TCGv_i64 in) { TCGv_i64 t_max = tcg_const_i64(0xffffffffffff0000ull); TCGv_i64 t_nan = tcg_const_i64(0xffffffffffff7e00ull); tcg_gen_movcond_i64(TCG_COND_GEU, out, in, t_max, in, t_nan); tcg_temp_free_i64(t_max); tcg_temp_free_i64(t_nan); } static void gen_check_nanbox_s(TCGv_i64 out, TCGv_i64 in) { TCGv_i64 t_max = tcg_constant_i64(0xffffffff00000000ull); TCGv_i64 t_nan = tcg_constant_i64(0xffffffff7fc00000ull); tcg_gen_movcond_i64(TCG_COND_GEU, out, in, t_max, in, t_nan); } static void generate_exception(DisasContext *ctx, int excp) { tcg_gen_movi_tl(cpu_pc, ctx->base.pc_next); gen_helper_raise_exception(cpu_env, tcg_constant_i32(excp)); ctx->base.is_jmp = DISAS_NORETURN; } static void generate_exception_mtval(DisasContext *ctx, int excp) { tcg_gen_movi_tl(cpu_pc, ctx->base.pc_next); tcg_gen_st_tl(cpu_pc, cpu_env, offsetof(CPURISCVState, badaddr)); gen_helper_raise_exception(cpu_env, tcg_constant_i32(excp)); ctx->base.is_jmp = DISAS_NORETURN; } static void gen_exception_illegal(DisasContext *ctx) { generate_exception(ctx, RISCV_EXCP_ILLEGAL_INST); } static void gen_exception_inst_addr_mis(DisasContext *ctx) { generate_exception_mtval(ctx, RISCV_EXCP_INST_ADDR_MIS); } static void gen_goto_tb(DisasContext *ctx, int n, target_ulong dest) { if (translator_use_goto_tb(&ctx->base, dest)) { tcg_gen_goto_tb(n); tcg_gen_movi_tl(cpu_pc, dest); tcg_gen_exit_tb(ctx->base.tb, n); } else { tcg_gen_movi_tl(cpu_pc, dest); tcg_gen_lookup_and_goto_ptr(); } } /* * Wrappers for getting reg values. * * The $zero register does not have cpu_gpr[0] allocated -- we supply the * constant zero as a source, and an uninitialized sink as destination. * * Further, we may provide an extension for word operations. */ static TCGv temp_new(DisasContext *ctx) { assert(ctx->ntemp < ARRAY_SIZE(ctx->temp)); return ctx->temp[ctx->ntemp++] = tcg_temp_new(); } static TCGv get_gpr(DisasContext *ctx, int reg_num, DisasExtend ext) { TCGv t; if (reg_num == 0) { return ctx->zero; } switch (get_ol(ctx)) { case MXL_RV32: switch (ext) { case EXT_NONE: break; case EXT_SIGN: t = temp_new(ctx); tcg_gen_ext32s_tl(t, cpu_gpr[reg_num]); return t; case EXT_ZERO: t = temp_new(ctx); tcg_gen_ext32u_tl(t, cpu_gpr[reg_num]); return t; default: g_assert_not_reached(); } break; case MXL_RV64: case MXL_RV128: break; default: g_assert_not_reached(); } return cpu_gpr[reg_num]; } static TCGv get_gprh(DisasContext *ctx, int reg_num) { assert(get_xl(ctx) == MXL_RV128); if (reg_num == 0) { return ctx->zero; } return cpu_gprh[reg_num]; } static TCGv dest_gpr(DisasContext *ctx, int reg_num) { if (reg_num == 0 || get_olen(ctx) < TARGET_LONG_BITS) { return temp_new(ctx); } return cpu_gpr[reg_num]; } static TCGv dest_gprh(DisasContext *ctx, int reg_num) { if (reg_num == 0) { return temp_new(ctx); } return cpu_gprh[reg_num]; } static void gen_set_gpr(DisasContext *ctx, int reg_num, TCGv t) { if (reg_num != 0) { switch (get_ol(ctx)) { case MXL_RV32: tcg_gen_ext32s_tl(cpu_gpr[reg_num], t); break; case MXL_RV64: case MXL_RV128: tcg_gen_mov_tl(cpu_gpr[reg_num], t); break; default: g_assert_not_reached(); } if (get_xl_max(ctx) == MXL_RV128) { tcg_gen_sari_tl(cpu_gprh[reg_num], cpu_gpr[reg_num], 63); } } } static void gen_set_gpri(DisasContext *ctx, int reg_num, target_long imm) { if (reg_num != 0) { switch (get_ol(ctx)) { case MXL_RV32: tcg_gen_movi_tl(cpu_gpr[reg_num], (int32_t)imm); break; case MXL_RV64: case MXL_RV128: tcg_gen_movi_tl(cpu_gpr[reg_num], imm); break; default: g_assert_not_reached(); } if (get_xl_max(ctx) == MXL_RV128) { tcg_gen_movi_tl(cpu_gprh[reg_num], -(imm < 0)); } } } static void gen_set_gpr128(DisasContext *ctx, int reg_num, TCGv rl, TCGv rh) { assert(get_ol(ctx) == MXL_RV128); if (reg_num != 0) { tcg_gen_mov_tl(cpu_gpr[reg_num], rl); tcg_gen_mov_tl(cpu_gprh[reg_num], rh); } } static void gen_jal(DisasContext *ctx, int rd, target_ulong imm) { target_ulong next_pc; /* check misaligned: */ next_pc = ctx->base.pc_next + imm; if (!has_ext(ctx, RVC)) { if ((next_pc & 0x3) != 0) { gen_exception_inst_addr_mis(ctx); return; } } if (rd != 0) { tcg_gen_movi_tl(cpu_gpr[rd], ctx->pc_succ_insn); } gen_goto_tb(ctx, 0, ctx->base.pc_next + imm); /* must use this for safety */ ctx->base.is_jmp = DISAS_NORETURN; } /* * Generates address adjustment for PointerMasking */ static TCGv gen_pm_adjust_address(DisasContext *s, TCGv src) { TCGv temp; if (!s->pm_enabled) { /* Load unmodified address */ return src; } else { temp = temp_new(s); tcg_gen_andc_tl(temp, src, s->pm_mask); tcg_gen_or_tl(temp, temp, s->pm_base); return temp; } } #ifndef CONFIG_USER_ONLY /* The states of mstatus_fs are: * 0 = disabled, 1 = initial, 2 = clean, 3 = dirty * We will have already diagnosed disabled state, * and need to turn initial/clean into dirty. */ static void mark_fs_dirty(DisasContext *ctx) { TCGv tmp; if (ctx->mstatus_fs != MSTATUS_FS) { /* Remember the state change for the rest of the TB. */ ctx->mstatus_fs = MSTATUS_FS; tmp = tcg_temp_new(); tcg_gen_ld_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus)); tcg_gen_ori_tl(tmp, tmp, MSTATUS_FS); tcg_gen_st_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus)); tcg_temp_free(tmp); } if (ctx->virt_enabled && ctx->mstatus_hs_fs != MSTATUS_FS) { /* Remember the stage change for the rest of the TB. */ ctx->mstatus_hs_fs = MSTATUS_FS; tmp = tcg_temp_new(); tcg_gen_ld_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus_hs)); tcg_gen_ori_tl(tmp, tmp, MSTATUS_FS); tcg_gen_st_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus_hs)); tcg_temp_free(tmp); } } #else static inline void mark_fs_dirty(DisasContext *ctx) { } #endif #ifndef CONFIG_USER_ONLY /* The states of mstatus_vs are: * 0 = disabled, 1 = initial, 2 = clean, 3 = dirty * We will have already diagnosed disabled state, * and need to turn initial/clean into dirty. */ static void mark_vs_dirty(DisasContext *ctx) { TCGv tmp; if (ctx->mstatus_vs != MSTATUS_VS) { /* Remember the state change for the rest of the TB. */ ctx->mstatus_vs = MSTATUS_VS; tmp = tcg_temp_new(); tcg_gen_ld_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus)); tcg_gen_ori_tl(tmp, tmp, MSTATUS_VS); tcg_gen_st_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus)); tcg_temp_free(tmp); } if (ctx->virt_enabled && ctx->mstatus_hs_vs != MSTATUS_VS) { /* Remember the stage change for the rest of the TB. */ ctx->mstatus_hs_vs = MSTATUS_VS; tmp = tcg_temp_new(); tcg_gen_ld_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus_hs)); tcg_gen_ori_tl(tmp, tmp, MSTATUS_VS); tcg_gen_st_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus_hs)); tcg_temp_free(tmp); } } #else static inline void mark_vs_dirty(DisasContext *ctx) { } #endif static void gen_set_rm(DisasContext *ctx, int rm) { if (ctx->frm == rm) { return; } ctx->frm = rm; if (rm == RISCV_FRM_ROD) { gen_helper_set_rod_rounding_mode(cpu_env); return; } gen_helper_set_rounding_mode(cpu_env, tcg_constant_i32(rm)); } static int ex_plus_1(DisasContext *ctx, int nf) { return nf + 1; } #define EX_SH(amount) \ static int ex_shift_##amount(DisasContext *ctx, int imm) \ { \ return imm << amount; \ } EX_SH(1) EX_SH(2) EX_SH(3) EX_SH(4) EX_SH(12) #define REQUIRE_EXT(ctx, ext) do { \ if (!has_ext(ctx, ext)) { \ return false; \ } \ } while (0) #define REQUIRE_32BIT(ctx) do { \ if (get_xl(ctx) != MXL_RV32) { \ return false; \ } \ } while (0) #define REQUIRE_64BIT(ctx) do { \ if (get_xl(ctx) != MXL_RV64) { \ return false; \ } \ } while (0) #define REQUIRE_128BIT(ctx) do { \ if (get_xl(ctx) != MXL_RV128) { \ return false; \ } \ } while (0) #define REQUIRE_64_OR_128BIT(ctx) do { \ if (get_xl(ctx) == MXL_RV32) { \ return false; \ } \ } while (0) static int ex_rvc_register(DisasContext *ctx, int reg) { return 8 + reg; } static int ex_rvc_shifti(DisasContext *ctx, int imm) { /* For RV128 a shamt of 0 means a shift by 64. */ return imm ? imm : 64; } /* Include the auto-generated decoder for 32 bit insn */ #include "decode-insn32.c.inc" static bool gen_logic_imm_fn(DisasContext *ctx, arg_i *a, void (*func)(TCGv, TCGv, target_long)) { TCGv dest = dest_gpr(ctx, a->rd); TCGv src1 = get_gpr(ctx, a->rs1, EXT_NONE); func(dest, src1, a->imm); if (get_xl(ctx) == MXL_RV128) { TCGv src1h = get_gprh(ctx, a->rs1); TCGv desth = dest_gprh(ctx, a->rd); func(desth, src1h, -(a->imm < 0)); gen_set_gpr128(ctx, a->rd, dest, desth); } else { gen_set_gpr(ctx, a->rd, dest); } return true; } static bool gen_logic(DisasContext *ctx, arg_r *a, void (*func)(TCGv, TCGv, TCGv)) { TCGv dest = dest_gpr(ctx, a->rd); TCGv src1 = get_gpr(ctx, a->rs1, EXT_NONE); TCGv src2 = get_gpr(ctx, a->rs2, EXT_NONE); func(dest, src1, src2); if (get_xl(ctx) == MXL_RV128) { TCGv src1h = get_gprh(ctx, a->rs1); TCGv src2h = get_gprh(ctx, a->rs2); TCGv desth = dest_gprh(ctx, a->rd); func(desth, src1h, src2h); gen_set_gpr128(ctx, a->rd, dest, desth); } else { gen_set_gpr(ctx, a->rd, dest); } return true; } static bool gen_arith_imm_fn(DisasContext *ctx, arg_i *a, DisasExtend ext, void (*func)(TCGv, TCGv, target_long)) { TCGv dest = dest_gpr(ctx, a->rd); TCGv src1 = get_gpr(ctx, a->rs1, ext); func(dest, src1, a->imm); gen_set_gpr(ctx, a->rd, dest); return true; } static bool gen_arith_imm_tl(DisasContext *ctx, arg_i *a, DisasExtend ext, void (*func)(TCGv, TCGv, TCGv)) { TCGv dest = dest_gpr(ctx, a->rd); TCGv src1 = get_gpr(ctx, a->rs1, ext); TCGv src2 = tcg_constant_tl(a->imm); func(dest, src1, src2); gen_set_gpr(ctx, a->rd, dest); return true; } static bool gen_arith(DisasContext *ctx, arg_r *a, DisasExtend ext, void (*func)(TCGv, TCGv, TCGv)) { TCGv dest = dest_gpr(ctx, a->rd); TCGv src1 = get_gpr(ctx, a->rs1, ext); TCGv src2 = get_gpr(ctx, a->rs2, ext); func(dest, src1, src2); gen_set_gpr(ctx, a->rd, dest); return true; } static bool gen_arith_per_ol(DisasContext *ctx, arg_r *a, DisasExtend ext, void (*f_tl)(TCGv, TCGv, TCGv), void (*f_32)(TCGv, TCGv, TCGv)) { int olen = get_olen(ctx); if (olen != TARGET_LONG_BITS) { if (olen == 32) { f_tl = f_32; } else { g_assert_not_reached(); } } return gen_arith(ctx, a, ext, f_tl); } static bool gen_shift_imm_fn(DisasContext *ctx, arg_shift *a, DisasExtend ext, void (*func)(TCGv, TCGv, target_long)) { TCGv dest, src1; int max_len = get_olen(ctx); if (a->shamt >= max_len) { return false; } dest = dest_gpr(ctx, a->rd); src1 = get_gpr(ctx, a->rs1, ext); func(dest, src1, a->shamt); gen_set_gpr(ctx, a->rd, dest); return true; } static bool gen_shift_imm_fn_per_ol(DisasContext *ctx, arg_shift *a, DisasExtend ext, void (*f_tl)(TCGv, TCGv, target_long), void (*f_32)(TCGv, TCGv, target_long)) { int olen = get_olen(ctx); if (olen != TARGET_LONG_BITS) { if (olen == 32) { f_tl = f_32; } else { g_assert_not_reached(); } } return gen_shift_imm_fn(ctx, a, ext, f_tl); } static bool gen_shift_imm_tl(DisasContext *ctx, arg_shift *a, DisasExtend ext, void (*func)(TCGv, TCGv, TCGv)) { TCGv dest, src1, src2; int max_len = get_olen(ctx); if (a->shamt >= max_len) { return false; } dest = dest_gpr(ctx, a->rd); src1 = get_gpr(ctx, a->rs1, ext); src2 = tcg_constant_tl(a->shamt); func(dest, src1, src2); gen_set_gpr(ctx, a->rd, dest); return true; } static bool gen_shift(DisasContext *ctx, arg_r *a, DisasExtend ext, void (*func)(TCGv, TCGv, TCGv)) { TCGv dest = dest_gpr(ctx, a->rd); TCGv src1 = get_gpr(ctx, a->rs1, ext); TCGv src2 = get_gpr(ctx, a->rs2, EXT_NONE); TCGv ext2 = tcg_temp_new(); tcg_gen_andi_tl(ext2, src2, get_olen(ctx) - 1); func(dest, src1, ext2); gen_set_gpr(ctx, a->rd, dest); tcg_temp_free(ext2); return true; } static bool gen_shift_per_ol(DisasContext *ctx, arg_r *a, DisasExtend ext, void (*f_tl)(TCGv, TCGv, TCGv), void (*f_32)(TCGv, TCGv, TCGv)) { int olen = get_olen(ctx); if (olen != TARGET_LONG_BITS) { if (olen == 32) { f_tl = f_32; } else { g_assert_not_reached(); } } return gen_shift(ctx, a, ext, f_tl); } static bool gen_unary(DisasContext *ctx, arg_r2 *a, DisasExtend ext, void (*func)(TCGv, TCGv)) { TCGv dest = dest_gpr(ctx, a->rd); TCGv src1 = get_gpr(ctx, a->rs1, ext); func(dest, src1); gen_set_gpr(ctx, a->rd, dest); return true; } static bool gen_unary_per_ol(DisasContext *ctx, arg_r2 *a, DisasExtend ext, void (*f_tl)(TCGv, TCGv), void (*f_32)(TCGv, TCGv)) { int olen = get_olen(ctx); if (olen != TARGET_LONG_BITS) { if (olen == 32) { f_tl = f_32; } else { g_assert_not_reached(); } } return gen_unary(ctx, a, ext, f_tl); } static uint32_t opcode_at(DisasContextBase *dcbase, target_ulong pc) { DisasContext *ctx = container_of(dcbase, DisasContext, base); CPUState *cpu = ctx->cs; CPURISCVState *env = cpu->env_ptr; return cpu_ldl_code(env, pc); } /* Include insn module translation function */ #include "insn_trans/trans_rvi.c.inc" #include "insn_trans/trans_rvm.c.inc" #include "insn_trans/trans_rva.c.inc" #include "insn_trans/trans_rvf.c.inc" #include "insn_trans/trans_rvd.c.inc" #include "insn_trans/trans_rvh.c.inc" #include "insn_trans/trans_rvv.c.inc" #include "insn_trans/trans_rvb.c.inc" #include "insn_trans/trans_rvzfh.c.inc" #include "insn_trans/trans_privileged.c.inc" /* Include the auto-generated decoder for 16 bit insn */ #include "decode-insn16.c.inc" static void decode_opc(CPURISCVState *env, DisasContext *ctx, uint16_t opcode) { /* check for compressed insn */ if (extract16(opcode, 0, 2) != 3) { if (!has_ext(ctx, RVC)) { gen_exception_illegal(ctx); } else { ctx->pc_succ_insn = ctx->base.pc_next + 2; if (!decode_insn16(ctx, opcode)) { gen_exception_illegal(ctx); } } } else { uint32_t opcode32 = opcode; opcode32 = deposit32(opcode32, 16, 16, translator_lduw(env, &ctx->base, ctx->base.pc_next + 2)); ctx->pc_succ_insn = ctx->base.pc_next + 4; if (!decode_insn32(ctx, opcode32)) { gen_exception_illegal(ctx); } } } static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs) { DisasContext *ctx = container_of(dcbase, DisasContext, base); CPURISCVState *env = cs->env_ptr; RISCVCPU *cpu = RISCV_CPU(cs); uint32_t tb_flags = ctx->base.tb->flags; ctx->pc_succ_insn = ctx->base.pc_first; ctx->mem_idx = FIELD_EX32(tb_flags, TB_FLAGS, MEM_IDX); ctx->mstatus_fs = tb_flags & TB_FLAGS_MSTATUS_FS; ctx->mstatus_vs = tb_flags & TB_FLAGS_MSTATUS_VS; ctx->priv_ver = env->priv_ver; #if !defined(CONFIG_USER_ONLY) if (riscv_has_ext(env, RVH)) { ctx->virt_enabled = riscv_cpu_virt_enabled(env); } else { ctx->virt_enabled = false; } #else ctx->virt_enabled = false; #endif ctx->misa_ext = env->misa_ext; ctx->frm = -1; /* unknown rounding mode */ ctx->ext_ifencei = cpu->cfg.ext_ifencei; ctx->ext_zfh = cpu->cfg.ext_zfh; ctx->ext_zfhmin = cpu->cfg.ext_zfhmin; ctx->vlen = cpu->cfg.vlen; ctx->elen = cpu->cfg.elen; ctx->mstatus_hs_fs = FIELD_EX32(tb_flags, TB_FLAGS, MSTATUS_HS_FS); ctx->mstatus_hs_vs = FIELD_EX32(tb_flags, TB_FLAGS, MSTATUS_HS_VS); ctx->hlsx = FIELD_EX32(tb_flags, TB_FLAGS, HLSX); ctx->vill = FIELD_EX32(tb_flags, TB_FLAGS, VILL); ctx->sew = FIELD_EX32(tb_flags, TB_FLAGS, SEW); ctx->lmul = sextract32(FIELD_EX32(tb_flags, TB_FLAGS, LMUL), 0, 3); ctx->vstart = env->vstart; ctx->vl_eq_vlmax = FIELD_EX32(tb_flags, TB_FLAGS, VL_EQ_VLMAX); ctx->misa_mxl_max = env->misa_mxl_max; ctx->xl = FIELD_EX32(tb_flags, TB_FLAGS, XL); ctx->cs = cs; ctx->ntemp = 0; memset(ctx->temp, 0, sizeof(ctx->temp)); ctx->pm_enabled = FIELD_EX32(tb_flags, TB_FLAGS, PM_ENABLED); int priv = tb_flags & TB_FLAGS_PRIV_MMU_MASK; ctx->pm_mask = pm_mask[priv]; ctx->pm_base = pm_base[priv]; ctx->zero = tcg_constant_tl(0); } static void riscv_tr_tb_start(DisasContextBase *db, CPUState *cpu) { } static void riscv_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu) { DisasContext *ctx = container_of(dcbase, DisasContext, base); tcg_gen_insn_start(ctx->base.pc_next); } static void riscv_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu) { DisasContext *ctx = container_of(dcbase, DisasContext, base); CPURISCVState *env = cpu->env_ptr; uint16_t opcode16 = translator_lduw(env, &ctx->base, ctx->base.pc_next); ctx->ol = ctx->xl; decode_opc(env, ctx, opcode16); ctx->base.pc_next = ctx->pc_succ_insn; for (int i = ctx->ntemp - 1; i >= 0; --i) { tcg_temp_free(ctx->temp[i]); ctx->temp[i] = NULL; } ctx->ntemp = 0; 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; } } } 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: gen_goto_tb(ctx, 0, ctx->base.pc_next); break; case DISAS_NORETURN: break; default: g_assert_not_reached(); } } static void riscv_tr_disas_log(const DisasContextBase *dcbase, CPUState *cpu) { #ifndef CONFIG_USER_ONLY RISCVCPU *rvcpu = RISCV_CPU(cpu); CPURISCVState *env = &rvcpu->env; #endif qemu_log("IN: %s\n", lookup_symbol(dcbase->pc_first)); #ifndef CONFIG_USER_ONLY qemu_log("Priv: "TARGET_FMT_ld"; Virt: "TARGET_FMT_ld"\n", env->priv, env->virt); #endif 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, .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, int max_insns) { DisasContext ctx; translator_loop(&riscv_tr_ops, &ctx.base, cs, tb, max_insns); } void riscv_translate_init(void) { int i; /* * cpu_gpr[0] is a placeholder for the zero register. Do not use it. * Use the gen_set_gpr and get_gpr helper functions when accessing regs, * unless you specifically block reads/writes to reg 0. */ cpu_gpr[0] = NULL; cpu_gprh[0] = NULL; for (i = 1; i < 32; i++) { cpu_gpr[i] = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, gpr[i]), riscv_int_regnames[i]); cpu_gprh[i] = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, gprh[i]), riscv_int_regnamesh[i]); } for (i = 0; i < 32; i++) { cpu_fpr[i] = tcg_global_mem_new_i64(cpu_env, offsetof(CPURISCVState, fpr[i]), riscv_fpr_regnames[i]); } cpu_pc = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, pc), "pc"); cpu_vl = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, vl), "vl"); cpu_vstart = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, vstart), "vstart"); load_res = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, load_res), "load_res"); load_val = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, load_val), "load_val"); #ifndef CONFIG_USER_ONLY /* Assign PM CSRs to tcg globals */ pm_mask[PRV_U] = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, upmmask), "upmmask"); pm_base[PRV_U] = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, upmbase), "upmbase"); pm_mask[PRV_S] = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, spmmask), "spmmask"); pm_base[PRV_S] = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, spmbase), "spmbase"); pm_mask[PRV_M] = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, mpmmask), "mpmmask"); pm_base[PRV_M] = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, mpmbase), "mpmbase"); #endif }