/* * Xilinx MicroBlaze emulation for qemu: main translation routines. * * Copyright (c) 2009 Edgar E. Iglesias. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see . */ #include #include #include #include #include #include #include "cpu.h" #include "exec-all.h" #include "disas.h" #include "tcg-op.h" #include "helper.h" #include "microblaze-decode.h" #include "qemu-common.h" #define GEN_HELPER 1 #include "helper.h" #define SIM_COMPAT 0 #define DISAS_GNU 1 #define DISAS_MB 1 #if DISAS_MB && !SIM_COMPAT # define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__) #else # define LOG_DIS(...) do { } while (0) #endif #define D(x) #define EXTRACT_FIELD(src, start, end) \ (((src) >> start) & ((1 << (end - start + 1)) - 1)) static TCGv env_debug; static TCGv_ptr cpu_env; static TCGv cpu_R[32]; static TCGv cpu_SR[18]; static TCGv env_imm; static TCGv env_btaken; static TCGv env_btarget; static TCGv env_iflags; #include "gen-icount.h" /* This is the state at translation time. */ typedef struct DisasContext { CPUState *env; target_ulong pc; /* Decoder. */ int type_b; uint32_t ir; uint8_t opcode; uint8_t rd, ra, rb; uint16_t imm; unsigned int cpustate_changed; unsigned int delayed_branch; unsigned int tb_flags, synced_flags; /* tb dependent flags. */ unsigned int clear_imm; int is_jmp; #define JMP_NOJMP 0 #define JMP_DIRECT 1 #define JMP_DIRECT_CC 2 #define JMP_INDIRECT 3 unsigned int jmp; uint32_t jmp_pc; int abort_at_next_insn; int nr_nops; struct TranslationBlock *tb; int singlestep_enabled; } DisasContext; static const char *regnames[] = { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", }; static const char *special_regnames[] = { "rpc", "rmsr", "sr2", "sr3", "sr4", "sr5", "sr6", "sr7", "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15", "sr16", "sr17", "sr18" }; /* Sign extend at translation time. */ static inline int sign_extend(unsigned int val, unsigned int width) { int sval; /* LSL. */ val <<= 31 - width; sval = val; /* ASR. */ sval >>= 31 - width; return sval; } static inline void t_sync_flags(DisasContext *dc) { /* Synch the tb dependant flags between translator and runtime. */ if (dc->tb_flags != dc->synced_flags) { tcg_gen_movi_tl(env_iflags, dc->tb_flags); dc->synced_flags = dc->tb_flags; } } static inline void t_gen_raise_exception(DisasContext *dc, uint32_t index) { TCGv_i32 tmp = tcg_const_i32(index); t_sync_flags(dc); tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc); gen_helper_raise_exception(tmp); tcg_temp_free_i32(tmp); dc->is_jmp = DISAS_UPDATE; } static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest) { TranslationBlock *tb; tb = dc->tb; if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) { tcg_gen_goto_tb(n); tcg_gen_movi_tl(cpu_SR[SR_PC], dest); tcg_gen_exit_tb((long)tb + n); } else { tcg_gen_movi_tl(cpu_SR[SR_PC], dest); tcg_gen_exit_tb(0); } } static void read_carry(DisasContext *dc, TCGv d) { tcg_gen_shri_tl(d, cpu_SR[SR_MSR], 31); } static void write_carry(DisasContext *dc, TCGv v) { TCGv t0 = tcg_temp_new(); tcg_gen_shli_tl(t0, v, 31); tcg_gen_sari_tl(t0, t0, 31); tcg_gen_andi_tl(t0, t0, (MSR_C | MSR_CC)); tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], ~(MSR_C | MSR_CC)); tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t0); tcg_temp_free(t0); } /* True if ALU operand b is a small immediate that may deserve faster treatment. */ static inline int dec_alu_op_b_is_small_imm(DisasContext *dc) { /* Immediate insn without the imm prefix ? */ return dc->type_b && !(dc->tb_flags & IMM_FLAG); } static inline TCGv *dec_alu_op_b(DisasContext *dc) { if (dc->type_b) { if (dc->tb_flags & IMM_FLAG) tcg_gen_ori_tl(env_imm, env_imm, dc->imm); else tcg_gen_movi_tl(env_imm, (int32_t)((int16_t)dc->imm)); return &env_imm; } else return &cpu_R[dc->rb]; } static void dec_add(DisasContext *dc) { unsigned int k, c; TCGv cf; k = dc->opcode & 4; c = dc->opcode & 2; LOG_DIS("add%s%s%s r%d r%d r%d\n", dc->type_b ? "i" : "", k ? "k" : "", c ? "c" : "", dc->rd, dc->ra, dc->rb); /* Take care of the easy cases first. */ if (k) { /* k - keep carry, no need to update MSR. */ /* If rd == r0, it's a nop. */ if (dc->rd) { tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); if (c) { /* c - Add carry into the result. */ cf = tcg_temp_new(); read_carry(dc, cf); tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf); tcg_temp_free(cf); } } return; } /* From now on, we can assume k is zero. So we need to update MSR. */ /* Extract carry. */ cf = tcg_temp_new(); if (c) { read_carry(dc, cf); } else { tcg_gen_movi_tl(cf, 0); } if (dc->rd) { TCGv ncf = tcg_temp_new(); gen_helper_addkc(ncf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf); tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf); write_carry(dc, ncf); tcg_temp_free(ncf); } else { gen_helper_addkc(cf, cpu_R[dc->ra], *(dec_alu_op_b(dc)), cf); write_carry(dc, cf); } tcg_temp_free(cf); } static void dec_sub(DisasContext *dc) { unsigned int u, cmp, k, c; TCGv cf, na; u = dc->imm & 2; k = dc->opcode & 4; c = dc->opcode & 2; cmp = (dc->imm & 1) && (!dc->type_b) && k; if (cmp) { LOG_DIS("cmp%s r%d, r%d ir=%x\n", u ? "u" : "", dc->rd, dc->ra, dc->ir); if (dc->rd) { if (u) gen_helper_cmpu(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); else gen_helper_cmp(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); } return; } LOG_DIS("sub%s%s r%d, r%d r%d\n", k ? "k" : "", c ? "c" : "", dc->rd, dc->ra, dc->rb); /* Take care of the easy cases first. */ if (k) { /* k - keep carry, no need to update MSR. */ /* If rd == r0, it's a nop. */ if (dc->rd) { tcg_gen_sub_tl(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]); if (c) { /* c - Add carry into the result. */ cf = tcg_temp_new(); read_carry(dc, cf); tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf); tcg_temp_free(cf); } } return; } /* From now on, we can assume k is zero. So we need to update MSR. */ /* Extract carry. And complement a into na. */ cf = tcg_temp_new(); na = tcg_temp_new(); if (c) { read_carry(dc, cf); } else { tcg_gen_movi_tl(cf, 1); } /* d = b + ~a + c. carry defaults to 1. */ tcg_gen_not_tl(na, cpu_R[dc->ra]); if (dc->rd) { TCGv ncf = tcg_temp_new(); gen_helper_addkc(ncf, na, *(dec_alu_op_b(dc)), cf); tcg_gen_add_tl(cpu_R[dc->rd], na, *(dec_alu_op_b(dc))); tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->rd], cf); write_carry(dc, ncf); tcg_temp_free(ncf); } else { gen_helper_addkc(cf, na, *(dec_alu_op_b(dc)), cf); write_carry(dc, cf); } tcg_temp_free(cf); tcg_temp_free(na); } static void dec_pattern(DisasContext *dc) { unsigned int mode; int l1; if ((dc->tb_flags & MSR_EE_FLAG) && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK) && !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); t_gen_raise_exception(dc, EXCP_HW_EXCP); } mode = dc->opcode & 3; switch (mode) { case 0: /* pcmpbf. */ LOG_DIS("pcmpbf r%d r%d r%d\n", dc->rd, dc->ra, dc->rb); if (dc->rd) gen_helper_pcmpbf(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 2: LOG_DIS("pcmpeq r%d r%d r%d\n", dc->rd, dc->ra, dc->rb); if (dc->rd) { TCGv t0 = tcg_temp_local_new(); l1 = gen_new_label(); tcg_gen_movi_tl(t0, 1); tcg_gen_brcond_tl(TCG_COND_EQ, cpu_R[dc->ra], cpu_R[dc->rb], l1); tcg_gen_movi_tl(t0, 0); gen_set_label(l1); tcg_gen_mov_tl(cpu_R[dc->rd], t0); tcg_temp_free(t0); } break; case 3: LOG_DIS("pcmpne r%d r%d r%d\n", dc->rd, dc->ra, dc->rb); l1 = gen_new_label(); if (dc->rd) { TCGv t0 = tcg_temp_local_new(); tcg_gen_movi_tl(t0, 1); tcg_gen_brcond_tl(TCG_COND_NE, cpu_R[dc->ra], cpu_R[dc->rb], l1); tcg_gen_movi_tl(t0, 0); gen_set_label(l1); tcg_gen_mov_tl(cpu_R[dc->rd], t0); tcg_temp_free(t0); } break; default: cpu_abort(dc->env, "unsupported pattern insn opcode=%x\n", dc->opcode); break; } } static void dec_and(DisasContext *dc) { unsigned int not; if (!dc->type_b && (dc->imm & (1 << 10))) { dec_pattern(dc); return; } not = dc->opcode & (1 << 1); LOG_DIS("and%s\n", not ? "n" : ""); if (!dc->rd) return; if (not) { TCGv t = tcg_temp_new(); tcg_gen_not_tl(t, *(dec_alu_op_b(dc))); tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], t); tcg_temp_free(t); } else tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); } static void dec_or(DisasContext *dc) { if (!dc->type_b && (dc->imm & (1 << 10))) { dec_pattern(dc); return; } LOG_DIS("or r%d r%d r%d imm=%x\n", dc->rd, dc->ra, dc->rb, dc->imm); if (dc->rd) tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); } static void dec_xor(DisasContext *dc) { if (!dc->type_b && (dc->imm & (1 << 10))) { dec_pattern(dc); return; } LOG_DIS("xor r%d\n", dc->rd); if (dc->rd) tcg_gen_xor_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); } static inline void msr_read(DisasContext *dc, TCGv d) { tcg_gen_mov_tl(d, cpu_SR[SR_MSR]); } static inline void msr_write(DisasContext *dc, TCGv v) { dc->cpustate_changed = 1; tcg_gen_mov_tl(cpu_SR[SR_MSR], v); /* PVR, we have a processor version register. */ tcg_gen_ori_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], (1 << 10)); } static void dec_msr(DisasContext *dc) { TCGv t0, t1; unsigned int sr, to, rn; int mem_index = cpu_mmu_index(dc->env); sr = dc->imm & ((1 << 14) - 1); to = dc->imm & (1 << 14); dc->type_b = 1; if (to) dc->cpustate_changed = 1; /* msrclr and msrset. */ if (!(dc->imm & (1 << 15))) { unsigned int clr = dc->ir & (1 << 16); LOG_DIS("msr%s r%d imm=%x\n", clr ? "clr" : "set", dc->rd, dc->imm); if (!(dc->env->pvr.regs[2] & PVR2_USE_MSR_INSTR)) { /* nop??? */ return; } if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX && (dc->imm != 4 && dc->imm != 0)) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } if (dc->rd) msr_read(dc, cpu_R[dc->rd]); t0 = tcg_temp_new(); t1 = tcg_temp_new(); msr_read(dc, t0); tcg_gen_mov_tl(t1, *(dec_alu_op_b(dc))); if (clr) { tcg_gen_not_tl(t1, t1); tcg_gen_and_tl(t0, t0, t1); } else tcg_gen_or_tl(t0, t0, t1); msr_write(dc, t0); tcg_temp_free(t0); tcg_temp_free(t1); tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc + 4); dc->is_jmp = DISAS_UPDATE; return; } if (to) { if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } } #if !defined(CONFIG_USER_ONLY) /* Catch read/writes to the mmu block. */ if ((sr & ~0xff) == 0x1000) { sr &= 7; LOG_DIS("m%ss sr%d r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm); if (to) gen_helper_mmu_write(tcg_const_tl(sr), cpu_R[dc->ra]); else gen_helper_mmu_read(cpu_R[dc->rd], tcg_const_tl(sr)); return; } #endif if (to) { LOG_DIS("m%ss sr%x r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm); switch (sr) { case 0: break; case 1: msr_write(dc, cpu_R[dc->ra]); break; case 0x3: tcg_gen_mov_tl(cpu_SR[SR_EAR], cpu_R[dc->ra]); break; case 0x5: tcg_gen_mov_tl(cpu_SR[SR_ESR], cpu_R[dc->ra]); break; case 0x7: tcg_gen_andi_tl(cpu_SR[SR_FSR], cpu_R[dc->ra], 31); break; default: cpu_abort(dc->env, "unknown mts reg %x\n", sr); break; } } else { LOG_DIS("m%ss r%d sr%x imm=%x\n", to ? "t" : "f", dc->rd, sr, dc->imm); switch (sr) { case 0: tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc); break; case 1: msr_read(dc, cpu_R[dc->rd]); break; case 0x3: tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_EAR]); break; case 0x5: tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_ESR]); break; case 0x7: tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_FSR]); break; case 0xb: tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_BTR]); break; case 0x2000: case 0x2001: case 0x2002: case 0x2003: case 0x2004: case 0x2005: case 0x2006: case 0x2007: case 0x2008: case 0x2009: case 0x200a: case 0x200b: case 0x200c: rn = sr & 0xf; tcg_gen_ld_tl(cpu_R[dc->rd], cpu_env, offsetof(CPUState, pvr.regs[rn])); break; default: cpu_abort(dc->env, "unknown mfs reg %x\n", sr); break; } } if (dc->rd == 0) { tcg_gen_movi_tl(cpu_R[0], 0); } } /* 64-bit signed mul, lower result in d and upper in d2. */ static void t_gen_muls(TCGv d, TCGv d2, TCGv a, TCGv b) { TCGv_i64 t0, t1; t0 = tcg_temp_new_i64(); t1 = tcg_temp_new_i64(); tcg_gen_ext_i32_i64(t0, a); tcg_gen_ext_i32_i64(t1, b); tcg_gen_mul_i64(t0, t0, t1); tcg_gen_trunc_i64_i32(d, t0); tcg_gen_shri_i64(t0, t0, 32); tcg_gen_trunc_i64_i32(d2, t0); tcg_temp_free_i64(t0); tcg_temp_free_i64(t1); } /* 64-bit unsigned muls, lower result in d and upper in d2. */ static void t_gen_mulu(TCGv d, TCGv d2, TCGv a, TCGv b) { TCGv_i64 t0, t1; t0 = tcg_temp_new_i64(); t1 = tcg_temp_new_i64(); tcg_gen_extu_i32_i64(t0, a); tcg_gen_extu_i32_i64(t1, b); tcg_gen_mul_i64(t0, t0, t1); tcg_gen_trunc_i64_i32(d, t0); tcg_gen_shri_i64(t0, t0, 32); tcg_gen_trunc_i64_i32(d2, t0); tcg_temp_free_i64(t0); tcg_temp_free_i64(t1); } /* Multiplier unit. */ static void dec_mul(DisasContext *dc) { TCGv d[2]; unsigned int subcode; if ((dc->tb_flags & MSR_EE_FLAG) && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK) && !(dc->env->pvr.regs[0] & PVR0_USE_HW_MUL_MASK)) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } subcode = dc->imm & 3; d[0] = tcg_temp_new(); d[1] = tcg_temp_new(); if (dc->type_b) { LOG_DIS("muli r%d r%d %x\n", dc->rd, dc->ra, dc->imm); t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], *(dec_alu_op_b(dc))); goto done; } /* mulh, mulhsu and mulhu are not available if C_USE_HW_MUL is < 2. */ if (subcode >= 1 && subcode <= 3 && !((dc->env->pvr.regs[2] & PVR2_USE_MUL64_MASK))) { /* nop??? */ } switch (subcode) { case 0: LOG_DIS("mul r%d r%d r%d\n", dc->rd, dc->ra, dc->rb); t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 1: LOG_DIS("mulh r%d r%d r%d\n", dc->rd, dc->ra, dc->rb); t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 2: LOG_DIS("mulhsu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb); t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 3: LOG_DIS("mulhu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb); t_gen_mulu(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; default: cpu_abort(dc->env, "unknown MUL insn %x\n", subcode); break; } done: tcg_temp_free(d[0]); tcg_temp_free(d[1]); } /* Div unit. */ static void dec_div(DisasContext *dc) { unsigned int u; u = dc->imm & 2; LOG_DIS("div\n"); if ((dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK) && !((dc->env->pvr.regs[0] & PVR0_USE_DIV_MASK))) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); t_gen_raise_exception(dc, EXCP_HW_EXCP); } if (u) gen_helper_divu(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]); else gen_helper_divs(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]); if (!dc->rd) tcg_gen_movi_tl(cpu_R[dc->rd], 0); } static void dec_barrel(DisasContext *dc) { TCGv t0; unsigned int s, t; if ((dc->tb_flags & MSR_EE_FLAG) && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK) && !(dc->env->pvr.regs[0] & PVR0_USE_BARREL_MASK)) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } s = dc->imm & (1 << 10); t = dc->imm & (1 << 9); LOG_DIS("bs%s%s r%d r%d r%d\n", s ? "l" : "r", t ? "a" : "l", dc->rd, dc->ra, dc->rb); t0 = tcg_temp_new(); tcg_gen_mov_tl(t0, *(dec_alu_op_b(dc))); tcg_gen_andi_tl(t0, t0, 31); if (s) tcg_gen_shl_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0); else { if (t) tcg_gen_sar_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0); else tcg_gen_shr_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0); } } static void dec_bit(DisasContext *dc) { TCGv t0, t1; unsigned int op; int mem_index = cpu_mmu_index(dc->env); op = dc->ir & ((1 << 8) - 1); switch (op) { case 0x21: /* src. */ t0 = tcg_temp_new(); LOG_DIS("src r%d r%d\n", dc->rd, dc->ra); tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1); if (dc->rd) { t1 = tcg_temp_new(); read_carry(dc, t1); tcg_gen_shli_tl(t1, t1, 31); tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1); tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->rd], t1); tcg_temp_free(t1); } /* Update carry. */ write_carry(dc, t0); tcg_temp_free(t0); break; case 0x1: case 0x41: /* srl. */ t0 = tcg_temp_new(); LOG_DIS("srl r%d r%d\n", dc->rd, dc->ra); /* Update carry. */ tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1); write_carry(dc, t0); tcg_temp_free(t0); if (dc->rd) { if (op == 0x41) tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1); else tcg_gen_sari_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1); } break; case 0x60: LOG_DIS("ext8s r%d r%d\n", dc->rd, dc->ra); tcg_gen_ext8s_i32(cpu_R[dc->rd], cpu_R[dc->ra]); break; case 0x61: LOG_DIS("ext16s r%d r%d\n", dc->rd, dc->ra); tcg_gen_ext16s_i32(cpu_R[dc->rd], cpu_R[dc->ra]); break; case 0x64: case 0x66: case 0x74: case 0x76: /* wdc. */ LOG_DIS("wdc r%d\n", dc->ra); if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } break; case 0x68: /* wic. */ LOG_DIS("wic r%d\n", dc->ra); if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } break; default: cpu_abort(dc->env, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n", dc->pc, op, dc->rd, dc->ra, dc->rb); break; } } static inline void sync_jmpstate(DisasContext *dc) { if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) { if (dc->jmp == JMP_DIRECT) { tcg_gen_movi_tl(env_btaken, 1); } dc->jmp = JMP_INDIRECT; tcg_gen_movi_tl(env_btarget, dc->jmp_pc); } } static void dec_imm(DisasContext *dc) { LOG_DIS("imm %x\n", dc->imm << 16); tcg_gen_movi_tl(env_imm, (dc->imm << 16)); dc->tb_flags |= IMM_FLAG; dc->clear_imm = 0; } static inline void gen_load(DisasContext *dc, TCGv dst, TCGv addr, unsigned int size) { int mem_index = cpu_mmu_index(dc->env); if (size == 1) { tcg_gen_qemu_ld8u(dst, addr, mem_index); } else if (size == 2) { tcg_gen_qemu_ld16u(dst, addr, mem_index); } else if (size == 4) { tcg_gen_qemu_ld32u(dst, addr, mem_index); } else cpu_abort(dc->env, "Incorrect load size %d\n", size); } static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t) { unsigned int extimm = dc->tb_flags & IMM_FLAG; /* Treat the common cases first. */ if (!dc->type_b) { /* If any of the regs is r0, return a ptr to the other. */ if (dc->ra == 0) { return &cpu_R[dc->rb]; } else if (dc->rb == 0) { return &cpu_R[dc->ra]; } *t = tcg_temp_new(); tcg_gen_add_tl(*t, cpu_R[dc->ra], cpu_R[dc->rb]); return t; } /* Immediate. */ if (!extimm) { if (dc->imm == 0) { return &cpu_R[dc->ra]; } *t = tcg_temp_new(); tcg_gen_movi_tl(*t, (int32_t)((int16_t)dc->imm)); tcg_gen_add_tl(*t, cpu_R[dc->ra], *t); } else { *t = tcg_temp_new(); tcg_gen_add_tl(*t, cpu_R[dc->ra], *(dec_alu_op_b(dc))); } return t; } static inline void dec_byteswap(DisasContext *dc, TCGv dst, TCGv src, int size) { if (size == 4) { tcg_gen_bswap32_tl(dst, src); } else if (size == 2) { TCGv t = tcg_temp_new(); /* bswap16 assumes the high bits are zero. */ tcg_gen_andi_tl(t, src, 0xffff); tcg_gen_bswap16_tl(dst, t); tcg_temp_free(t); } else { /* Ignore. cpu_abort(dc->env, "Invalid ldst byteswap size %d\n", size); */ } } static void dec_load(DisasContext *dc) { TCGv t, *addr; unsigned int size, rev = 0; size = 1 << (dc->opcode & 3); if (!dc->type_b) { rev = (dc->ir >> 9) & 1; } if (size > 4 && (dc->tb_flags & MSR_EE_FLAG) && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } LOG_DIS("l%d%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : ""); t_sync_flags(dc); addr = compute_ldst_addr(dc, &t); /* * When doing reverse accesses we need to do two things. * * 1. Reverse the address wrt endianess. * 2. Byteswap the data lanes on the way back into the CPU core. */ if (rev && size != 4) { /* Endian reverse the address. t is addr. */ switch (size) { case 1: { /* 00 -> 11 01 -> 10 10 -> 10 11 -> 00 */ TCGv low = tcg_temp_new(); /* Force addr into the temp. */ if (addr != &t) { t = tcg_temp_new(); tcg_gen_mov_tl(t, *addr); addr = &t; } tcg_gen_andi_tl(low, t, 3); tcg_gen_sub_tl(low, tcg_const_tl(3), low); tcg_gen_andi_tl(t, t, ~3); tcg_gen_or_tl(t, t, low); tcg_gen_mov_tl(env_imm, t); tcg_temp_free(low); break; } case 2: /* 00 -> 10 10 -> 00. */ /* Force addr into the temp. */ if (addr != &t) { t = tcg_temp_new(); tcg_gen_xori_tl(t, *addr, 2); addr = &t; } else { tcg_gen_xori_tl(t, t, 2); } break; default: cpu_abort(dc->env, "Invalid reverse size\n"); break; } } /* If we get a fault on a dslot, the jmpstate better be in sync. */ sync_jmpstate(dc); /* Verify alignment if needed. */ if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) { TCGv v = tcg_temp_new(); /* * Microblaze gives MMU faults priority over faults due to * unaligned addresses. That's why we speculatively do the load * into v. If the load succeeds, we verify alignment of the * address and if that succeeds we write into the destination reg. */ gen_load(dc, v, *addr, size); tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc); gen_helper_memalign(*addr, tcg_const_tl(dc->rd), tcg_const_tl(0), tcg_const_tl(size - 1)); if (dc->rd) { if (rev) { dec_byteswap(dc, cpu_R[dc->rd], v, size); } else { tcg_gen_mov_tl(cpu_R[dc->rd], v); } } tcg_temp_free(v); } else { if (dc->rd) { gen_load(dc, cpu_R[dc->rd], *addr, size); if (rev) { dec_byteswap(dc, cpu_R[dc->rd], cpu_R[dc->rd], size); } } else { /* We are loading into r0, no need to reverse. */ gen_load(dc, env_imm, *addr, size); } } if (addr == &t) tcg_temp_free(t); } static void gen_store(DisasContext *dc, TCGv addr, TCGv val, unsigned int size) { int mem_index = cpu_mmu_index(dc->env); if (size == 1) tcg_gen_qemu_st8(val, addr, mem_index); else if (size == 2) { tcg_gen_qemu_st16(val, addr, mem_index); } else if (size == 4) { tcg_gen_qemu_st32(val, addr, mem_index); } else cpu_abort(dc->env, "Incorrect store size %d\n", size); } static void dec_store(DisasContext *dc) { TCGv t, *addr; unsigned int size, rev = 0; size = 1 << (dc->opcode & 3); if (!dc->type_b) { rev = (dc->ir >> 9) & 1; } if (size > 4 && (dc->tb_flags & MSR_EE_FLAG) && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } LOG_DIS("s%d%s%s\n", size, dc->type_b ? "i" : "", rev ? "r" : ""); t_sync_flags(dc); /* If we get a fault on a dslot, the jmpstate better be in sync. */ sync_jmpstate(dc); addr = compute_ldst_addr(dc, &t); if (rev && size != 4) { /* Endian reverse the address. t is addr. */ switch (size) { case 1: { /* 00 -> 11 01 -> 10 10 -> 10 11 -> 00 */ TCGv low = tcg_temp_new(); /* Force addr into the temp. */ if (addr != &t) { t = tcg_temp_new(); tcg_gen_mov_tl(t, *addr); addr = &t; } tcg_gen_andi_tl(low, t, 3); tcg_gen_sub_tl(low, tcg_const_tl(3), low); tcg_gen_andi_tl(t, t, ~3); tcg_gen_or_tl(t, t, low); tcg_gen_mov_tl(env_imm, t); tcg_temp_free(low); break; } case 2: /* 00 -> 10 10 -> 00. */ /* Force addr into the temp. */ if (addr != &t) { t = tcg_temp_new(); tcg_gen_xori_tl(t, *addr, 2); addr = &t; } else { tcg_gen_xori_tl(t, t, 2); } break; default: cpu_abort(dc->env, "Invalid reverse size\n"); break; } if (size != 1) { TCGv bs_data = tcg_temp_new(); dec_byteswap(dc, bs_data, cpu_R[dc->rd], size); gen_store(dc, *addr, bs_data, size); tcg_temp_free(bs_data); } else { gen_store(dc, *addr, cpu_R[dc->rd], size); } } else { if (rev) { TCGv bs_data = tcg_temp_new(); dec_byteswap(dc, bs_data, cpu_R[dc->rd], size); gen_store(dc, *addr, bs_data, size); tcg_temp_free(bs_data); } else { gen_store(dc, *addr, cpu_R[dc->rd], size); } } /* Verify alignment if needed. */ if ((dc->env->pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) { tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc); /* FIXME: if the alignment is wrong, we should restore the value * in memory. One possible way to acheive this is to probe * the MMU prior to the memaccess, thay way we could put * the alignment checks in between the probe and the mem * access. */ gen_helper_memalign(*addr, tcg_const_tl(dc->rd), tcg_const_tl(1), tcg_const_tl(size - 1)); } if (addr == &t) tcg_temp_free(t); } static inline void eval_cc(DisasContext *dc, unsigned int cc, TCGv d, TCGv a, TCGv b) { switch (cc) { case CC_EQ: tcg_gen_setcond_tl(TCG_COND_EQ, d, a, b); break; case CC_NE: tcg_gen_setcond_tl(TCG_COND_NE, d, a, b); break; case CC_LT: tcg_gen_setcond_tl(TCG_COND_LT, d, a, b); break; case CC_LE: tcg_gen_setcond_tl(TCG_COND_LE, d, a, b); break; case CC_GE: tcg_gen_setcond_tl(TCG_COND_GE, d, a, b); break; case CC_GT: tcg_gen_setcond_tl(TCG_COND_GT, d, a, b); break; default: cpu_abort(dc->env, "Unknown condition code %x.\n", cc); break; } } static void eval_cond_jmp(DisasContext *dc, TCGv pc_true, TCGv pc_false) { int l1; l1 = gen_new_label(); /* Conditional jmp. */ tcg_gen_mov_tl(cpu_SR[SR_PC], pc_false); tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1); tcg_gen_mov_tl(cpu_SR[SR_PC], pc_true); gen_set_label(l1); } static void dec_bcc(DisasContext *dc) { unsigned int cc; unsigned int dslot; cc = EXTRACT_FIELD(dc->ir, 21, 23); dslot = dc->ir & (1 << 25); LOG_DIS("bcc%s r%d %x\n", dslot ? "d" : "", dc->ra, dc->imm); dc->delayed_branch = 1; if (dslot) { dc->delayed_branch = 2; dc->tb_flags |= D_FLAG; tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)), cpu_env, offsetof(CPUState, bimm)); } if (dec_alu_op_b_is_small_imm(dc)) { int32_t offset = (int32_t)((int16_t)dc->imm); /* sign-extend. */ tcg_gen_movi_tl(env_btarget, dc->pc + offset); dc->jmp = JMP_DIRECT_CC; dc->jmp_pc = dc->pc + offset; } else { dc->jmp = JMP_INDIRECT; tcg_gen_movi_tl(env_btarget, dc->pc); tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc))); } eval_cc(dc, cc, env_btaken, cpu_R[dc->ra], tcg_const_tl(0)); } static void dec_br(DisasContext *dc) { unsigned int dslot, link, abs; int mem_index = cpu_mmu_index(dc->env); dslot = dc->ir & (1 << 20); abs = dc->ir & (1 << 19); link = dc->ir & (1 << 18); LOG_DIS("br%s%s%s%s imm=%x\n", abs ? "a" : "", link ? "l" : "", dc->type_b ? "i" : "", dslot ? "d" : "", dc->imm); dc->delayed_branch = 1; if (dslot) { dc->delayed_branch = 2; dc->tb_flags |= D_FLAG; tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)), cpu_env, offsetof(CPUState, bimm)); } if (link && dc->rd) tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc); dc->jmp = JMP_INDIRECT; if (abs) { tcg_gen_movi_tl(env_btaken, 1); tcg_gen_mov_tl(env_btarget, *(dec_alu_op_b(dc))); if (link && !dslot) { if (!(dc->tb_flags & IMM_FLAG) && (dc->imm == 8 || dc->imm == 0x18)) t_gen_raise_exception(dc, EXCP_BREAK); if (dc->imm == 0) { if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } t_gen_raise_exception(dc, EXCP_DEBUG); } } } else { if (dec_alu_op_b_is_small_imm(dc)) { dc->jmp = JMP_DIRECT; dc->jmp_pc = dc->pc + (int32_t)((int16_t)dc->imm); } else { tcg_gen_movi_tl(env_btaken, 1); tcg_gen_movi_tl(env_btarget, dc->pc); tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc))); } } } static inline void do_rti(DisasContext *dc) { TCGv t0, t1; t0 = tcg_temp_new(); t1 = tcg_temp_new(); tcg_gen_shri_tl(t0, cpu_SR[SR_MSR], 1); tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_IE); tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM)); tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM)); tcg_gen_or_tl(t1, t1, t0); msr_write(dc, t1); tcg_temp_free(t1); tcg_temp_free(t0); dc->tb_flags &= ~DRTI_FLAG; } static inline void do_rtb(DisasContext *dc) { TCGv t0, t1; t0 = tcg_temp_new(); t1 = tcg_temp_new(); tcg_gen_andi_tl(t1, cpu_SR[SR_MSR], ~MSR_BIP); tcg_gen_shri_tl(t0, t1, 1); tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM)); tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM)); tcg_gen_or_tl(t1, t1, t0); msr_write(dc, t1); tcg_temp_free(t1); tcg_temp_free(t0); dc->tb_flags &= ~DRTB_FLAG; } static inline void do_rte(DisasContext *dc) { TCGv t0, t1; t0 = tcg_temp_new(); t1 = tcg_temp_new(); tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_EE); tcg_gen_andi_tl(t1, t1, ~MSR_EIP); tcg_gen_shri_tl(t0, t1, 1); tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM)); tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM)); tcg_gen_or_tl(t1, t1, t0); msr_write(dc, t1); tcg_temp_free(t1); tcg_temp_free(t0); dc->tb_flags &= ~DRTE_FLAG; } static void dec_rts(DisasContext *dc) { unsigned int b_bit, i_bit, e_bit; int mem_index = cpu_mmu_index(dc->env); i_bit = dc->ir & (1 << 21); b_bit = dc->ir & (1 << 22); e_bit = dc->ir & (1 << 23); dc->delayed_branch = 2; dc->tb_flags |= D_FLAG; tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)), cpu_env, offsetof(CPUState, bimm)); if (i_bit) { LOG_DIS("rtid ir=%x\n", dc->ir); if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); t_gen_raise_exception(dc, EXCP_HW_EXCP); } dc->tb_flags |= DRTI_FLAG; } else if (b_bit) { LOG_DIS("rtbd ir=%x\n", dc->ir); if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); t_gen_raise_exception(dc, EXCP_HW_EXCP); } dc->tb_flags |= DRTB_FLAG; } else if (e_bit) { LOG_DIS("rted ir=%x\n", dc->ir); if ((dc->tb_flags & MSR_EE_FLAG) && mem_index == MMU_USER_IDX) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_PRIVINSN); t_gen_raise_exception(dc, EXCP_HW_EXCP); } dc->tb_flags |= DRTE_FLAG; } else LOG_DIS("rts ir=%x\n", dc->ir); dc->jmp = JMP_INDIRECT; tcg_gen_movi_tl(env_btaken, 1); tcg_gen_add_tl(env_btarget, cpu_R[dc->ra], *(dec_alu_op_b(dc))); } static int dec_check_fpuv2(DisasContext *dc) { int r; r = dc->env->pvr.regs[2] & PVR2_USE_FPU2_MASK; if (!r && (dc->tb_flags & MSR_EE_FLAG)) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_FPU); t_gen_raise_exception(dc, EXCP_HW_EXCP); } return r; } static void dec_fpu(DisasContext *dc) { unsigned int fpu_insn; if ((dc->tb_flags & MSR_EE_FLAG) && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK) && !((dc->env->pvr.regs[2] & PVR2_USE_FPU_MASK))) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } fpu_insn = (dc->ir >> 7) & 7; switch (fpu_insn) { case 0: gen_helper_fadd(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 1: gen_helper_frsub(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 2: gen_helper_fmul(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 3: gen_helper_fdiv(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 4: switch ((dc->ir >> 4) & 7) { case 0: gen_helper_fcmp_un(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 1: gen_helper_fcmp_lt(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 2: gen_helper_fcmp_eq(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 3: gen_helper_fcmp_le(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 4: gen_helper_fcmp_gt(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 5: gen_helper_fcmp_ne(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; case 6: gen_helper_fcmp_ge(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); break; default: qemu_log ("unimplemented fcmp fpu_insn=%x pc=%x opc=%x\n", fpu_insn, dc->pc, dc->opcode); dc->abort_at_next_insn = 1; break; } break; case 5: if (!dec_check_fpuv2(dc)) { return; } gen_helper_flt(cpu_R[dc->rd], cpu_R[dc->ra]); break; case 6: if (!dec_check_fpuv2(dc)) { return; } gen_helper_fint(cpu_R[dc->rd], cpu_R[dc->ra]); break; case 7: if (!dec_check_fpuv2(dc)) { return; } gen_helper_fsqrt(cpu_R[dc->rd], cpu_R[dc->ra]); break; default: qemu_log ("unimplemented FPU insn fpu_insn=%x pc=%x opc=%x\n", fpu_insn, dc->pc, dc->opcode); dc->abort_at_next_insn = 1; break; } } static void dec_null(DisasContext *dc) { if ((dc->tb_flags & MSR_EE_FLAG) && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } qemu_log ("unknown insn pc=%x opc=%x\n", dc->pc, dc->opcode); dc->abort_at_next_insn = 1; } static struct decoder_info { struct { uint32_t bits; uint32_t mask; }; void (*dec)(DisasContext *dc); } decinfo[] = { {DEC_ADD, dec_add}, {DEC_SUB, dec_sub}, {DEC_AND, dec_and}, {DEC_XOR, dec_xor}, {DEC_OR, dec_or}, {DEC_BIT, dec_bit}, {DEC_BARREL, dec_barrel}, {DEC_LD, dec_load}, {DEC_ST, dec_store}, {DEC_IMM, dec_imm}, {DEC_BR, dec_br}, {DEC_BCC, dec_bcc}, {DEC_RTS, dec_rts}, {DEC_FPU, dec_fpu}, {DEC_MUL, dec_mul}, {DEC_DIV, dec_div}, {DEC_MSR, dec_msr}, {{0, 0}, dec_null} }; static inline void decode(DisasContext *dc) { uint32_t ir; int i; if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) tcg_gen_debug_insn_start(dc->pc); dc->ir = ir = ldl_code(dc->pc); LOG_DIS("%8.8x\t", dc->ir); if (dc->ir) dc->nr_nops = 0; else { if ((dc->tb_flags & MSR_EE_FLAG) && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK) && (dc->env->pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK)) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } LOG_DIS("nr_nops=%d\t", dc->nr_nops); dc->nr_nops++; if (dc->nr_nops > 4) cpu_abort(dc->env, "fetching nop sequence\n"); } /* bit 2 seems to indicate insn type. */ dc->type_b = ir & (1 << 29); dc->opcode = EXTRACT_FIELD(ir, 26, 31); dc->rd = EXTRACT_FIELD(ir, 21, 25); dc->ra = EXTRACT_FIELD(ir, 16, 20); dc->rb = EXTRACT_FIELD(ir, 11, 15); dc->imm = EXTRACT_FIELD(ir, 0, 15); /* Large switch for all insns. */ for (i = 0; i < ARRAY_SIZE(decinfo); i++) { if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) { decinfo[i].dec(dc); break; } } } static void check_breakpoint(CPUState *env, DisasContext *dc) { CPUBreakpoint *bp; if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) { QTAILQ_FOREACH(bp, &env->breakpoints, entry) { if (bp->pc == dc->pc) { t_gen_raise_exception(dc, EXCP_DEBUG); dc->is_jmp = DISAS_UPDATE; } } } } /* generate intermediate code for basic block 'tb'. */ static void gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb, int search_pc) { uint16_t *gen_opc_end; uint32_t pc_start; int j, lj; struct DisasContext ctx; struct DisasContext *dc = &ctx; uint32_t next_page_start, org_flags; target_ulong npc; int num_insns; int max_insns; qemu_log_try_set_file(stderr); pc_start = tb->pc; dc->env = env; dc->tb = tb; org_flags = dc->synced_flags = dc->tb_flags = tb->flags; gen_opc_end = gen_opc_buf + OPC_MAX_SIZE; dc->is_jmp = DISAS_NEXT; dc->jmp = 0; dc->delayed_branch = !!(dc->tb_flags & D_FLAG); if (dc->delayed_branch) { dc->jmp = JMP_INDIRECT; } dc->pc = pc_start; dc->singlestep_enabled = env->singlestep_enabled; dc->cpustate_changed = 0; dc->abort_at_next_insn = 0; dc->nr_nops = 0; if (pc_start & 3) cpu_abort(env, "Microblaze: unaligned PC=%x\n", pc_start); if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) { #if !SIM_COMPAT qemu_log("--------------\n"); log_cpu_state(env, 0); #endif } next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE; lj = -1; num_insns = 0; max_insns = tb->cflags & CF_COUNT_MASK; if (max_insns == 0) max_insns = CF_COUNT_MASK; gen_icount_start(); do { #if SIM_COMPAT if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) { tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc); gen_helper_debug(); } #endif check_breakpoint(env, dc); if (search_pc) { j = gen_opc_ptr - gen_opc_buf; if (lj < j) { lj++; while (lj < j) gen_opc_instr_start[lj++] = 0; } gen_opc_pc[lj] = dc->pc; gen_opc_instr_start[lj] = 1; gen_opc_icount[lj] = num_insns; } /* Pretty disas. */ LOG_DIS("%8.8x:\t", dc->pc); if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) gen_io_start(); dc->clear_imm = 1; decode(dc); if (dc->clear_imm) dc->tb_flags &= ~IMM_FLAG; dc->pc += 4; num_insns++; if (dc->delayed_branch) { dc->delayed_branch--; if (!dc->delayed_branch) { if (dc->tb_flags & DRTI_FLAG) do_rti(dc); if (dc->tb_flags & DRTB_FLAG) do_rtb(dc); if (dc->tb_flags & DRTE_FLAG) do_rte(dc); /* Clear the delay slot flag. */ dc->tb_flags &= ~D_FLAG; /* If it is a direct jump, try direct chaining. */ if (dc->jmp == JMP_INDIRECT) { eval_cond_jmp(dc, env_btarget, tcg_const_tl(dc->pc)); dc->is_jmp = DISAS_JUMP; } else if (dc->jmp == JMP_DIRECT) { t_sync_flags(dc); gen_goto_tb(dc, 0, dc->jmp_pc); dc->is_jmp = DISAS_TB_JUMP; } else if (dc->jmp == JMP_DIRECT_CC) { int l1; t_sync_flags(dc); l1 = gen_new_label(); /* Conditional jmp. */ tcg_gen_brcondi_tl(TCG_COND_NE, env_btaken, 0, l1); gen_goto_tb(dc, 1, dc->pc); gen_set_label(l1); gen_goto_tb(dc, 0, dc->jmp_pc); dc->is_jmp = DISAS_TB_JUMP; } break; } } if (env->singlestep_enabled) break; } while (!dc->is_jmp && !dc->cpustate_changed && gen_opc_ptr < gen_opc_end && !singlestep && (dc->pc < next_page_start) && num_insns < max_insns); npc = dc->pc; if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) { if (dc->tb_flags & D_FLAG) { dc->is_jmp = DISAS_UPDATE; tcg_gen_movi_tl(cpu_SR[SR_PC], npc); sync_jmpstate(dc); } else npc = dc->jmp_pc; } if (tb->cflags & CF_LAST_IO) gen_io_end(); /* Force an update if the per-tb cpu state has changed. */ if (dc->is_jmp == DISAS_NEXT && (dc->cpustate_changed || org_flags != dc->tb_flags)) { dc->is_jmp = DISAS_UPDATE; tcg_gen_movi_tl(cpu_SR[SR_PC], npc); } t_sync_flags(dc); if (unlikely(env->singlestep_enabled)) { t_gen_raise_exception(dc, EXCP_DEBUG); if (dc->is_jmp == DISAS_NEXT) tcg_gen_movi_tl(cpu_SR[SR_PC], npc); } else { switch(dc->is_jmp) { case DISAS_NEXT: gen_goto_tb(dc, 1, npc); break; default: case DISAS_JUMP: case DISAS_UPDATE: /* indicate that the hash table must be used to find the next TB */ tcg_gen_exit_tb(0); break; case DISAS_TB_JUMP: /* nothing more to generate */ break; } } gen_icount_end(tb, num_insns); *gen_opc_ptr = INDEX_op_end; if (search_pc) { j = gen_opc_ptr - gen_opc_buf; lj++; while (lj <= j) gen_opc_instr_start[lj++] = 0; } else { tb->size = dc->pc - pc_start; tb->icount = num_insns; } #ifdef DEBUG_DISAS #if !SIM_COMPAT if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) { qemu_log("\n"); #if DISAS_GNU log_target_disas(pc_start, dc->pc - pc_start, 0); #endif qemu_log("\nisize=%d osize=%td\n", dc->pc - pc_start, gen_opc_ptr - gen_opc_buf); } #endif #endif assert(!dc->abort_at_next_insn); } void gen_intermediate_code (CPUState *env, struct TranslationBlock *tb) { gen_intermediate_code_internal(env, tb, 0); } void gen_intermediate_code_pc (CPUState *env, struct TranslationBlock *tb) { gen_intermediate_code_internal(env, tb, 1); } void cpu_dump_state (CPUState *env, FILE *f, fprintf_function cpu_fprintf, int flags) { int i; if (!env || !f) return; cpu_fprintf(f, "IN: PC=%x %s\n", env->sregs[SR_PC], lookup_symbol(env->sregs[SR_PC])); cpu_fprintf(f, "rmsr=%x resr=%x rear=%x debug=%x imm=%x iflags=%x fsr=%x\n", env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR], env->debug, env->imm, env->iflags, env->sregs[SR_FSR]); cpu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n", env->btaken, env->btarget, (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel", (env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel", (env->sregs[SR_MSR] & MSR_EIP), (env->sregs[SR_MSR] & MSR_IE)); for (i = 0; i < 32; i++) { cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]); if ((i + 1) % 4 == 0) cpu_fprintf(f, "\n"); } cpu_fprintf(f, "\n\n"); } CPUState *cpu_mb_init (const char *cpu_model) { CPUState *env; static int tcg_initialized = 0; int i; env = qemu_mallocz(sizeof(CPUState)); cpu_exec_init(env); cpu_reset(env); set_float_rounding_mode(float_round_nearest_even, &env->fp_status); if (tcg_initialized) return env; tcg_initialized = 1; cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env"); env_debug = tcg_global_mem_new(TCG_AREG0, offsetof(CPUState, debug), "debug0"); env_iflags = tcg_global_mem_new(TCG_AREG0, offsetof(CPUState, iflags), "iflags"); env_imm = tcg_global_mem_new(TCG_AREG0, offsetof(CPUState, imm), "imm"); env_btarget = tcg_global_mem_new(TCG_AREG0, offsetof(CPUState, btarget), "btarget"); env_btaken = tcg_global_mem_new(TCG_AREG0, offsetof(CPUState, btaken), "btaken"); for (i = 0; i < ARRAY_SIZE(cpu_R); i++) { cpu_R[i] = tcg_global_mem_new(TCG_AREG0, offsetof(CPUState, regs[i]), regnames[i]); } for (i = 0; i < ARRAY_SIZE(cpu_SR); i++) { cpu_SR[i] = tcg_global_mem_new(TCG_AREG0, offsetof(CPUState, sregs[i]), special_regnames[i]); } #define GEN_HELPER 2 #include "helper.h" return env; } void cpu_reset (CPUState *env) { if (qemu_loglevel_mask(CPU_LOG_RESET)) { qemu_log("CPU Reset (CPU %d)\n", env->cpu_index); log_cpu_state(env, 0); } memset(env, 0, offsetof(CPUMBState, breakpoints)); tlb_flush(env, 1); env->pvr.regs[0] = PVR0_PVR_FULL_MASK \ | PVR0_USE_BARREL_MASK \ | PVR0_USE_DIV_MASK \ | PVR0_USE_HW_MUL_MASK \ | PVR0_USE_EXC_MASK \ | PVR0_USE_ICACHE_MASK \ | PVR0_USE_DCACHE_MASK \ | PVR0_USE_MMU \ | (0xb << 8); env->pvr.regs[2] = PVR2_D_OPB_MASK \ | PVR2_D_LMB_MASK \ | PVR2_I_OPB_MASK \ | PVR2_I_LMB_MASK \ | PVR2_USE_MSR_INSTR \ | PVR2_USE_PCMP_INSTR \ | PVR2_USE_BARREL_MASK \ | PVR2_USE_DIV_MASK \ | PVR2_USE_HW_MUL_MASK \ | PVR2_USE_MUL64_MASK \ | PVR2_USE_FPU_MASK \ | PVR2_USE_FPU2_MASK \ | PVR2_FPU_EXC_MASK \ | 0; env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family. */ env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17); #if defined(CONFIG_USER_ONLY) /* start in user mode with interrupts enabled. */ env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM; env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp. */ #else env->sregs[SR_MSR] = 0; mmu_init(&env->mmu); env->mmu.c_mmu = 3; env->mmu.c_mmu_tlb_access = 3; env->mmu.c_mmu_zones = 16; #endif } void gen_pc_load(CPUState *env, struct TranslationBlock *tb, unsigned long searched_pc, int pc_pos, void *puc) { env->sregs[SR_PC] = gen_opc_pc[pc_pos]; }