| /* |
| * 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 <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <stdarg.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <inttypes.h> |
| #include <assert.h> |
| |
| #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_INDIRECT 2 |
| 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); |
| } |
| } |
| |
| /* 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; |
| |
| 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); |
| |
| if (k && !c && dc->rd) |
| tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
| else if (dc->rd) |
| gen_helper_addkc(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)), |
| tcg_const_tl(k), tcg_const_tl(c)); |
| else { |
| TCGv d = tcg_temp_new(); |
| gen_helper_addkc(d, cpu_R[dc->ra], *(dec_alu_op_b(dc)), |
| tcg_const_tl(k), tcg_const_tl(c)); |
| tcg_temp_free(d); |
| } |
| } |
| |
| static void dec_sub(DisasContext *dc) |
| { |
| unsigned int u, cmp, k, c; |
| |
| 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]); |
| } |
| } else { |
| LOG_DIS("sub%s%s r%d, r%d r%d\n", |
| k ? "k" : "", c ? "c" : "", dc->rd, dc->ra, dc->rb); |
| |
| if (!k || c) { |
| TCGv t; |
| t = tcg_temp_new(); |
| if (dc->rd) |
| gen_helper_subkc(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)), |
| tcg_const_tl(k), tcg_const_tl(c)); |
| else |
| gen_helper_subkc(t, cpu_R[dc->ra], *(dec_alu_op_b(dc)), |
| tcg_const_tl(k), tcg_const_tl(c)); |
| tcg_temp_free(t); |
| } |
| else if (dc->rd) |
| tcg_gen_sub_tl(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]); |
| } |
| } |
| |
| 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 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_mov_tl(env_debug, t0); |
| 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); |
| } |
| |
| |
| 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: |
| /* Ignored at the moment. */ |
| 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_movi_tl(cpu_R[dc->rd], 0); |
| 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_INDIRECT; |
| tcg_gen_movi_tl(env_btaken, 1); |
| 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 fast 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 void dec_load(DisasContext *dc) |
| { |
| TCGv t, *addr; |
| unsigned int size; |
| |
| size = 1 << (dc->opcode & 3); |
| 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 %x %d\n", dc->opcode, size); |
| t_sync_flags(dc); |
| addr = compute_ldst_addr(dc, &t); |
| |
| /* 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) |
| 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); |
| } else { |
| 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; |
| |
| size = 1 << (dc->opcode & 3); |
| |
| 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\n", size, dc->type_b ? "i" : ""); |
| 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); |
| |
| 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. |
| */ |
| 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); |
| } else { |
| tcg_gen_movi_tl(env_btarget, dc->pc); |
| tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc))); |
| } |
| dc->jmp = JMP_INDIRECT; |
| 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); |
| |
| tcg_gen_movi_tl(env_btaken, 1); |
| tcg_gen_add_tl(env_btarget, cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
| } |
| |
| static void dec_fpu(DisasContext *dc) |
| { |
| 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_FPU); |
| t_gen_raise_exception(dc, EXCP_HW_EXCP); |
| return; |
| } |
| |
| qemu_log ("unimplemented FPU insn pc=%x opc=%x\n", dc->pc, dc->opcode); |
| dc->abort_at_next_insn = 1; |
| } |
| |
| 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); |
| 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_DIRECT) { |
| eval_cond_jmp(dc, env_btarget, tcg_const_tl(dc->pc)); |
| dc->is_jmp = DISAS_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) { |
| 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=%zd\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, |
| int (*cpu_fprintf)(FILE *f, const char *fmt, ...), |
| 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\n", |
| env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR], |
| env->debug, env->imm, env->iflags); |
| 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); |
| |
| |
| 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 \ |
| | 0; |
| env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family. */ |
| env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17); |
| |
| env->sregs[SR_MSR] = 0; |
| #if defined(CONFIG_USER_ONLY) |
| /* start in user mode with interrupts enabled. */ |
| env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp. */ |
| #else |
| 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]; |
| } |
