root / target-microblaze / translate.c @ 8167ee88
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/*
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* Xilinx MicroBlaze emulation for qemu: main translation routines.
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*
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* Copyright (c) 2009 Edgar E. Iglesias.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdarg.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <inttypes.h> |
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#include <assert.h> |
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#include "cpu.h" |
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#include "exec-all.h" |
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#include "disas.h" |
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#include "tcg-op.h" |
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#include "helper.h" |
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#include "microblaze-decode.h" |
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#include "qemu-common.h" |
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#define GEN_HELPER 1 |
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#include "helper.h" |
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#define SIM_COMPAT 0 |
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#define DISAS_GNU 1 |
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#define DISAS_MB 1 |
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#if DISAS_MB && !SIM_COMPAT
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# define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__) |
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#else
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# define LOG_DIS(...) do { } while (0) |
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#endif
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|
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#define D(x)
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#define EXTRACT_FIELD(src, start, end) \
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(((src) >> start) & ((1 << (end - start + 1)) - 1)) |
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static TCGv env_debug;
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static TCGv_ptr cpu_env;
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static TCGv cpu_R[32]; |
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static TCGv cpu_SR[18]; |
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static TCGv env_imm;
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static TCGv env_btaken;
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static TCGv env_btarget;
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static TCGv env_iflags;
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#include "gen-icount.h" |
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/* This is the state at translation time. */
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typedef struct DisasContext { |
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CPUState *env; |
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target_ulong pc, ppc; |
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target_ulong cache_pc; |
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/* Decoder. */
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int type_b;
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uint32_t ir; |
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uint8_t opcode; |
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uint8_t rd, ra, rb; |
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uint16_t imm; |
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|
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unsigned int cpustate_changed; |
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unsigned int delayed_branch; |
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unsigned int tb_flags, synced_flags; /* tb dependent flags. */ |
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unsigned int clear_imm; |
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int is_jmp;
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#define JMP_NOJMP 0 |
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#define JMP_DIRECT 1 |
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#define JMP_INDIRECT 2 |
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unsigned int jmp; |
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uint32_t jmp_pc; |
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int abort_at_next_insn;
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int nr_nops;
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struct TranslationBlock *tb;
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int singlestep_enabled;
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} DisasContext; |
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const static char *regnames[] = |
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{
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", |
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", |
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", |
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}; |
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|
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const static char *special_regnames[] = |
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{
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"rpc", "rmsr", "sr2", "sr3", "sr4", "sr5", "sr6", "sr7", |
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"sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15", |
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"sr16", "sr17", "sr18" |
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}; |
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/* Sign extend at translation time. */
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static inline int sign_extend(unsigned int val, unsigned int width) |
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{
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int sval;
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/* LSL. */
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val <<= 31 - width;
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sval = val; |
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/* ASR. */
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sval >>= 31 - width;
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return sval;
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} |
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static inline void t_sync_flags(DisasContext *dc) |
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{
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/* Synch the tb dependant flags between translator and runtime. */
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if (dc->tb_flags != dc->synced_flags) {
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tcg_gen_movi_tl(env_iflags, dc->tb_flags); |
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dc->synced_flags = dc->tb_flags; |
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} |
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} |
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static inline void t_gen_raise_exception(DisasContext *dc, uint32_t index) |
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{
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TCGv_i32 tmp = tcg_const_i32(index); |
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t_sync_flags(dc); |
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tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc); |
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gen_helper_raise_exception(tmp); |
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tcg_temp_free_i32(tmp); |
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dc->is_jmp = DISAS_UPDATE; |
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} |
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static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest) |
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{
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TranslationBlock *tb; |
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tb = dc->tb; |
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if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
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tcg_gen_goto_tb(n); |
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tcg_gen_movi_tl(cpu_SR[SR_PC], dest); |
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tcg_gen_exit_tb((long)tb + n);
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} else {
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tcg_gen_movi_tl(cpu_SR[SR_PC], dest); |
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tcg_gen_exit_tb(0);
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} |
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} |
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static inline TCGv *dec_alu_op_b(DisasContext *dc) |
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{
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if (dc->type_b) {
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if (dc->tb_flags & IMM_FLAG)
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tcg_gen_ori_tl(env_imm, env_imm, dc->imm); |
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else
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tcg_gen_movi_tl(env_imm, (int32_t)((int16_t)dc->imm)); |
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return &env_imm;
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} else
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return &cpu_R[dc->rb];
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} |
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static void dec_add(DisasContext *dc) |
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{
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unsigned int k, c; |
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k = dc->opcode & 4;
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c = dc->opcode & 2;
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LOG_DIS("add%s%s%s r%d r%d r%d\n",
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dc->type_b ? "i" : "", k ? "k" : "", c ? "c" : "", |
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dc->rd, dc->ra, dc->rb); |
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if (k && !c && dc->rd)
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tcg_gen_add_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
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else if (dc->rd) |
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gen_helper_addkc(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)), |
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tcg_const_tl(k), tcg_const_tl(c)); |
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else {
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TCGv d = tcg_temp_new(); |
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gen_helper_addkc(d, cpu_R[dc->ra], *(dec_alu_op_b(dc)), |
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tcg_const_tl(k), tcg_const_tl(c)); |
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tcg_temp_free(d); |
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} |
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} |
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static void dec_sub(DisasContext *dc) |
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{
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unsigned int u, cmp, k, c; |
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u = dc->imm & 2;
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k = dc->opcode & 4;
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c = dc->opcode & 2;
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cmp = (dc->imm & 1) && (!dc->type_b) && k;
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if (cmp) {
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LOG_DIS("cmp%s r%d, r%d ir=%x\n", u ? "u" : "", dc->rd, dc->ra, dc->ir); |
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if (dc->rd) {
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if (u)
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gen_helper_cmpu(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); |
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else
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gen_helper_cmp(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); |
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} |
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} else {
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LOG_DIS("sub%s%s r%d, r%d r%d\n",
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k ? "k" : "", c ? "c" : "", dc->rd, dc->ra, dc->rb); |
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if (!k || c) {
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TCGv t; |
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t = tcg_temp_new(); |
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if (dc->rd)
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gen_helper_subkc(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)), |
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tcg_const_tl(k), tcg_const_tl(c)); |
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else
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gen_helper_subkc(t, cpu_R[dc->ra], *(dec_alu_op_b(dc)), |
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tcg_const_tl(k), tcg_const_tl(c)); |
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tcg_temp_free(t); |
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} |
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else if (dc->rd) |
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tcg_gen_sub_tl(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]); |
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} |
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} |
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|
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static void dec_pattern(DisasContext *dc) |
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{
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unsigned int mode; |
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int l1;
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|
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mode = dc->opcode & 3;
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switch (mode) {
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case 0: |
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/* pcmpbf. */
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LOG_DIS("pcmpbf r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
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if (dc->rd)
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gen_helper_pcmpbf(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); |
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break;
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case 2: |
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LOG_DIS("pcmpeq r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
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if (dc->rd) {
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TCGv t0 = tcg_temp_local_new(); |
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l1 = gen_new_label(); |
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tcg_gen_movi_tl(t0, 1);
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tcg_gen_brcond_tl(TCG_COND_EQ, |
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cpu_R[dc->ra], cpu_R[dc->rb], l1); |
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tcg_gen_movi_tl(t0, 0);
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gen_set_label(l1); |
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tcg_gen_mov_tl(cpu_R[dc->rd], t0); |
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tcg_temp_free(t0); |
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} |
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break;
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case 3: |
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LOG_DIS("pcmpne r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
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l1 = gen_new_label(); |
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if (dc->rd) {
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TCGv t0 = tcg_temp_local_new(); |
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tcg_gen_movi_tl(t0, 1);
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tcg_gen_brcond_tl(TCG_COND_NE, |
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cpu_R[dc->ra], cpu_R[dc->rb], l1); |
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tcg_gen_movi_tl(t0, 0);
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gen_set_label(l1); |
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tcg_gen_mov_tl(cpu_R[dc->rd], t0); |
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tcg_temp_free(t0); |
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} |
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break;
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default:
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cpu_abort(dc->env, |
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"unsupported pattern insn opcode=%x\n", dc->opcode);
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break;
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} |
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} |
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|
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static void dec_and(DisasContext *dc) |
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{
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unsigned int not; |
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|
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if (!dc->type_b && (dc->imm & (1 << 10))) { |
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dec_pattern(dc); |
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return;
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} |
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not = dc->opcode & (1 << 1); |
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LOG_DIS("and%s\n", not ? "n" : ""); |
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|
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if (!dc->rd)
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return;
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|
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if (not) {
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TCGv t = tcg_temp_new(); |
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tcg_gen_not_tl(t, *(dec_alu_op_b(dc))); |
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tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], t); |
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tcg_temp_free(t); |
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} else
|
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tcg_gen_and_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
| 299 |
} |
| 300 |
|
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static void dec_or(DisasContext *dc) |
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{
|
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if (!dc->type_b && (dc->imm & (1 << 10))) { |
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dec_pattern(dc); |
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return;
|
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} |
| 307 |
|
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LOG_DIS("or r%d r%d r%d imm=%x\n", dc->rd, dc->ra, dc->rb, dc->imm);
|
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if (dc->rd)
|
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tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
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} |
| 312 |
|
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static void dec_xor(DisasContext *dc) |
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{
|
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if (!dc->type_b && (dc->imm & (1 << 10))) { |
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dec_pattern(dc); |
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return;
|
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} |
| 319 |
|
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LOG_DIS("xor r%d\n", dc->rd);
|
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if (dc->rd)
|
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tcg_gen_xor_tl(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
| 323 |
} |
| 324 |
|
| 325 |
static void read_carry(DisasContext *dc, TCGv d) |
| 326 |
{
|
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tcg_gen_shri_tl(d, cpu_SR[SR_MSR], 31);
|
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} |
| 329 |
|
| 330 |
static void write_carry(DisasContext *dc, TCGv v) |
| 331 |
{
|
| 332 |
TCGv t0 = tcg_temp_new(); |
| 333 |
tcg_gen_shli_tl(t0, v, 31);
|
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tcg_gen_sari_tl(t0, t0, 31);
|
| 335 |
tcg_gen_mov_tl(env_debug, t0); |
| 336 |
tcg_gen_andi_tl(t0, t0, (MSR_C | MSR_CC)); |
| 337 |
tcg_gen_andi_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], |
| 338 |
~(MSR_C | MSR_CC)); |
| 339 |
tcg_gen_or_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], t0); |
| 340 |
tcg_temp_free(t0); |
| 341 |
} |
| 342 |
|
| 343 |
|
| 344 |
static inline void msr_read(DisasContext *dc, TCGv d) |
| 345 |
{
|
| 346 |
tcg_gen_mov_tl(d, cpu_SR[SR_MSR]); |
| 347 |
} |
| 348 |
|
| 349 |
static inline void msr_write(DisasContext *dc, TCGv v) |
| 350 |
{
|
| 351 |
dc->cpustate_changed = 1;
|
| 352 |
tcg_gen_mov_tl(cpu_SR[SR_MSR], v); |
| 353 |
/* PVR, we have a processor version register. */
|
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tcg_gen_ori_tl(cpu_SR[SR_MSR], cpu_SR[SR_MSR], (1 << 10)); |
| 355 |
} |
| 356 |
|
| 357 |
static void dec_msr(DisasContext *dc) |
| 358 |
{
|
| 359 |
TCGv t0, t1; |
| 360 |
unsigned int sr, to, rn; |
| 361 |
|
| 362 |
sr = dc->imm & ((1 << 14) - 1); |
| 363 |
to = dc->imm & (1 << 14); |
| 364 |
dc->type_b = 1;
|
| 365 |
if (to)
|
| 366 |
dc->cpustate_changed = 1;
|
| 367 |
|
| 368 |
/* msrclr and msrset. */
|
| 369 |
if (!(dc->imm & (1 << 15))) { |
| 370 |
unsigned int clr = dc->ir & (1 << 16); |
| 371 |
|
| 372 |
LOG_DIS("msr%s r%d imm=%x\n", clr ? "clr" : "set", |
| 373 |
dc->rd, dc->imm); |
| 374 |
if (dc->rd)
|
| 375 |
msr_read(dc, cpu_R[dc->rd]); |
| 376 |
|
| 377 |
t0 = tcg_temp_new(); |
| 378 |
t1 = tcg_temp_new(); |
| 379 |
msr_read(dc, t0); |
| 380 |
tcg_gen_mov_tl(t1, *(dec_alu_op_b(dc))); |
| 381 |
|
| 382 |
if (clr) {
|
| 383 |
tcg_gen_not_tl(t1, t1); |
| 384 |
tcg_gen_and_tl(t0, t0, t1); |
| 385 |
} else
|
| 386 |
tcg_gen_or_tl(t0, t0, t1); |
| 387 |
msr_write(dc, t0); |
| 388 |
tcg_temp_free(t0); |
| 389 |
tcg_temp_free(t1); |
| 390 |
tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc + 4);
|
| 391 |
dc->is_jmp = DISAS_UPDATE; |
| 392 |
return;
|
| 393 |
} |
| 394 |
|
| 395 |
#if !defined(CONFIG_USER_ONLY)
|
| 396 |
/* Catch read/writes to the mmu block. */
|
| 397 |
if ((sr & ~0xff) == 0x1000) { |
| 398 |
sr &= 7;
|
| 399 |
LOG_DIS("m%ss sr%d r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm); |
| 400 |
if (to)
|
| 401 |
gen_helper_mmu_write(tcg_const_tl(sr), cpu_R[dc->ra]); |
| 402 |
else
|
| 403 |
gen_helper_mmu_read(cpu_R[dc->rd], tcg_const_tl(sr)); |
| 404 |
return;
|
| 405 |
} |
| 406 |
#endif
|
| 407 |
|
| 408 |
if (to) {
|
| 409 |
LOG_DIS("m%ss sr%x r%d imm=%x\n", to ? "t" : "f", sr, dc->ra, dc->imm); |
| 410 |
switch (sr) {
|
| 411 |
case 0: |
| 412 |
break;
|
| 413 |
case 1: |
| 414 |
msr_write(dc, cpu_R[dc->ra]); |
| 415 |
break;
|
| 416 |
case 0x3: |
| 417 |
tcg_gen_mov_tl(cpu_SR[SR_EAR], cpu_R[dc->ra]); |
| 418 |
break;
|
| 419 |
case 0x5: |
| 420 |
tcg_gen_mov_tl(cpu_SR[SR_ESR], cpu_R[dc->ra]); |
| 421 |
break;
|
| 422 |
case 0x7: |
| 423 |
/* Ignored at the moment. */
|
| 424 |
break;
|
| 425 |
default:
|
| 426 |
cpu_abort(dc->env, "unknown mts reg %x\n", sr);
|
| 427 |
break;
|
| 428 |
} |
| 429 |
} else {
|
| 430 |
LOG_DIS("m%ss r%d sr%x imm=%x\n", to ? "t" : "f", dc->rd, sr, dc->imm); |
| 431 |
|
| 432 |
switch (sr) {
|
| 433 |
case 0: |
| 434 |
tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc); |
| 435 |
break;
|
| 436 |
case 1: |
| 437 |
msr_read(dc, cpu_R[dc->rd]); |
| 438 |
break;
|
| 439 |
case 0x3: |
| 440 |
tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_EAR]); |
| 441 |
break;
|
| 442 |
case 0x5: |
| 443 |
tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_ESR]); |
| 444 |
break;
|
| 445 |
case 0x7: |
| 446 |
tcg_gen_movi_tl(cpu_R[dc->rd], 0);
|
| 447 |
break;
|
| 448 |
case 0xb: |
| 449 |
tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_BTR]); |
| 450 |
break;
|
| 451 |
case 0x2000: |
| 452 |
case 0x2001: |
| 453 |
case 0x2002: |
| 454 |
case 0x2003: |
| 455 |
case 0x2004: |
| 456 |
case 0x2005: |
| 457 |
case 0x2006: |
| 458 |
case 0x2007: |
| 459 |
case 0x2008: |
| 460 |
case 0x2009: |
| 461 |
case 0x200a: |
| 462 |
case 0x200b: |
| 463 |
case 0x200c: |
| 464 |
rn = sr & 0xf;
|
| 465 |
tcg_gen_ld_tl(cpu_R[dc->rd], |
| 466 |
cpu_env, offsetof(CPUState, pvr.regs[rn])); |
| 467 |
break;
|
| 468 |
default:
|
| 469 |
cpu_abort(dc->env, "unknown mfs reg %x\n", sr);
|
| 470 |
break;
|
| 471 |
} |
| 472 |
} |
| 473 |
} |
| 474 |
|
| 475 |
/* 64-bit signed mul, lower result in d and upper in d2. */
|
| 476 |
static void t_gen_muls(TCGv d, TCGv d2, TCGv a, TCGv b) |
| 477 |
{
|
| 478 |
TCGv_i64 t0, t1; |
| 479 |
|
| 480 |
t0 = tcg_temp_new_i64(); |
| 481 |
t1 = tcg_temp_new_i64(); |
| 482 |
|
| 483 |
tcg_gen_ext_i32_i64(t0, a); |
| 484 |
tcg_gen_ext_i32_i64(t1, b); |
| 485 |
tcg_gen_mul_i64(t0, t0, t1); |
| 486 |
|
| 487 |
tcg_gen_trunc_i64_i32(d, t0); |
| 488 |
tcg_gen_shri_i64(t0, t0, 32);
|
| 489 |
tcg_gen_trunc_i64_i32(d2, t0); |
| 490 |
|
| 491 |
tcg_temp_free_i64(t0); |
| 492 |
tcg_temp_free_i64(t1); |
| 493 |
} |
| 494 |
|
| 495 |
/* 64-bit unsigned muls, lower result in d and upper in d2. */
|
| 496 |
static void t_gen_mulu(TCGv d, TCGv d2, TCGv a, TCGv b) |
| 497 |
{
|
| 498 |
TCGv_i64 t0, t1; |
| 499 |
|
| 500 |
t0 = tcg_temp_new_i64(); |
| 501 |
t1 = tcg_temp_new_i64(); |
| 502 |
|
| 503 |
tcg_gen_extu_i32_i64(t0, a); |
| 504 |
tcg_gen_extu_i32_i64(t1, b); |
| 505 |
tcg_gen_mul_i64(t0, t0, t1); |
| 506 |
|
| 507 |
tcg_gen_trunc_i64_i32(d, t0); |
| 508 |
tcg_gen_shri_i64(t0, t0, 32);
|
| 509 |
tcg_gen_trunc_i64_i32(d2, t0); |
| 510 |
|
| 511 |
tcg_temp_free_i64(t0); |
| 512 |
tcg_temp_free_i64(t1); |
| 513 |
} |
| 514 |
|
| 515 |
/* Multiplier unit. */
|
| 516 |
static void dec_mul(DisasContext *dc) |
| 517 |
{
|
| 518 |
TCGv d[2];
|
| 519 |
unsigned int subcode; |
| 520 |
|
| 521 |
subcode = dc->imm & 3;
|
| 522 |
d[0] = tcg_temp_new();
|
| 523 |
d[1] = tcg_temp_new();
|
| 524 |
|
| 525 |
if (dc->type_b) {
|
| 526 |
LOG_DIS("muli r%d r%d %x\n", dc->rd, dc->ra, dc->imm);
|
| 527 |
t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
|
| 528 |
goto done;
|
| 529 |
} |
| 530 |
|
| 531 |
switch (subcode) {
|
| 532 |
case 0: |
| 533 |
LOG_DIS("mul r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
|
| 534 |
t_gen_mulu(cpu_R[dc->rd], d[1], cpu_R[dc->ra], cpu_R[dc->rb]);
|
| 535 |
break;
|
| 536 |
case 1: |
| 537 |
LOG_DIS("mulh r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
|
| 538 |
t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
|
| 539 |
break;
|
| 540 |
case 2: |
| 541 |
LOG_DIS("mulhsu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
|
| 542 |
t_gen_muls(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
|
| 543 |
break;
|
| 544 |
case 3: |
| 545 |
LOG_DIS("mulhu r%d r%d r%d\n", dc->rd, dc->ra, dc->rb);
|
| 546 |
t_gen_mulu(d[0], cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
|
| 547 |
break;
|
| 548 |
default:
|
| 549 |
cpu_abort(dc->env, "unknown MUL insn %x\n", subcode);
|
| 550 |
break;
|
| 551 |
} |
| 552 |
done:
|
| 553 |
tcg_temp_free(d[0]);
|
| 554 |
tcg_temp_free(d[1]);
|
| 555 |
} |
| 556 |
|
| 557 |
/* Div unit. */
|
| 558 |
static void dec_div(DisasContext *dc) |
| 559 |
{
|
| 560 |
unsigned int u; |
| 561 |
|
| 562 |
u = dc->imm & 2;
|
| 563 |
LOG_DIS("div\n");
|
| 564 |
|
| 565 |
/* FIXME: support div by zero exceptions. */
|
| 566 |
if (u)
|
| 567 |
gen_helper_divu(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]); |
| 568 |
else
|
| 569 |
gen_helper_divs(cpu_R[dc->rd], *(dec_alu_op_b(dc)), cpu_R[dc->ra]); |
| 570 |
if (!dc->rd)
|
| 571 |
tcg_gen_movi_tl(cpu_R[dc->rd], 0);
|
| 572 |
} |
| 573 |
|
| 574 |
static void dec_barrel(DisasContext *dc) |
| 575 |
{
|
| 576 |
TCGv t0; |
| 577 |
unsigned int s, t; |
| 578 |
|
| 579 |
s = dc->imm & (1 << 10); |
| 580 |
t = dc->imm & (1 << 9); |
| 581 |
|
| 582 |
LOG_DIS("bs%s%s r%d r%d r%d\n",
|
| 583 |
s ? "l" : "r", t ? "a" : "l", dc->rd, dc->ra, dc->rb); |
| 584 |
|
| 585 |
t0 = tcg_temp_new(); |
| 586 |
|
| 587 |
tcg_gen_mov_tl(t0, *(dec_alu_op_b(dc))); |
| 588 |
tcg_gen_andi_tl(t0, t0, 31);
|
| 589 |
|
| 590 |
if (s)
|
| 591 |
tcg_gen_shl_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0); |
| 592 |
else {
|
| 593 |
if (t)
|
| 594 |
tcg_gen_sar_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0); |
| 595 |
else
|
| 596 |
tcg_gen_shr_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0); |
| 597 |
} |
| 598 |
} |
| 599 |
|
| 600 |
static void dec_bit(DisasContext *dc) |
| 601 |
{
|
| 602 |
TCGv t0, t1; |
| 603 |
unsigned int op; |
| 604 |
|
| 605 |
op = dc->ir & ((1 << 8) - 1); |
| 606 |
switch (op) {
|
| 607 |
case 0x21: |
| 608 |
/* src. */
|
| 609 |
t0 = tcg_temp_new(); |
| 610 |
|
| 611 |
LOG_DIS("src r%d r%d\n", dc->rd, dc->ra);
|
| 612 |
tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
|
| 613 |
if (dc->rd) {
|
| 614 |
t1 = tcg_temp_new(); |
| 615 |
read_carry(dc, t1); |
| 616 |
tcg_gen_shli_tl(t1, t1, 31);
|
| 617 |
|
| 618 |
tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
|
| 619 |
tcg_gen_or_tl(cpu_R[dc->rd], cpu_R[dc->rd], t1); |
| 620 |
tcg_temp_free(t1); |
| 621 |
} |
| 622 |
|
| 623 |
/* Update carry. */
|
| 624 |
write_carry(dc, t0); |
| 625 |
tcg_temp_free(t0); |
| 626 |
break;
|
| 627 |
|
| 628 |
case 0x1: |
| 629 |
case 0x41: |
| 630 |
/* srl. */
|
| 631 |
t0 = tcg_temp_new(); |
| 632 |
LOG_DIS("srl r%d r%d\n", dc->rd, dc->ra);
|
| 633 |
|
| 634 |
/* Update carry. */
|
| 635 |
tcg_gen_andi_tl(t0, cpu_R[dc->ra], 1);
|
| 636 |
write_carry(dc, t0); |
| 637 |
tcg_temp_free(t0); |
| 638 |
if (dc->rd) {
|
| 639 |
if (op == 0x41) |
| 640 |
tcg_gen_shri_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
|
| 641 |
else
|
| 642 |
tcg_gen_sari_tl(cpu_R[dc->rd], cpu_R[dc->ra], 1);
|
| 643 |
} |
| 644 |
break;
|
| 645 |
case 0x60: |
| 646 |
LOG_DIS("ext8s r%d r%d\n", dc->rd, dc->ra);
|
| 647 |
tcg_gen_ext8s_i32(cpu_R[dc->rd], cpu_R[dc->ra]); |
| 648 |
break;
|
| 649 |
case 0x61: |
| 650 |
LOG_DIS("ext16s r%d r%d\n", dc->rd, dc->ra);
|
| 651 |
tcg_gen_ext16s_i32(cpu_R[dc->rd], cpu_R[dc->ra]); |
| 652 |
break;
|
| 653 |
case 0x64: |
| 654 |
/* wdc. */
|
| 655 |
LOG_DIS("wdc r%d\n", dc->ra);
|
| 656 |
break;
|
| 657 |
case 0x68: |
| 658 |
/* wic. */
|
| 659 |
LOG_DIS("wic r%d\n", dc->ra);
|
| 660 |
break;
|
| 661 |
default:
|
| 662 |
cpu_abort(dc->env, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n",
|
| 663 |
dc->pc, op, dc->rd, dc->ra, dc->rb); |
| 664 |
break;
|
| 665 |
} |
| 666 |
} |
| 667 |
|
| 668 |
static inline void sync_jmpstate(DisasContext *dc) |
| 669 |
{
|
| 670 |
if (dc->jmp == JMP_DIRECT) {
|
| 671 |
dc->jmp = JMP_INDIRECT; |
| 672 |
tcg_gen_movi_tl(env_btaken, 1);
|
| 673 |
tcg_gen_movi_tl(env_btarget, dc->jmp_pc); |
| 674 |
} |
| 675 |
} |
| 676 |
|
| 677 |
static void dec_imm(DisasContext *dc) |
| 678 |
{
|
| 679 |
LOG_DIS("imm %x\n", dc->imm << 16); |
| 680 |
tcg_gen_movi_tl(env_imm, (dc->imm << 16));
|
| 681 |
dc->tb_flags |= IMM_FLAG; |
| 682 |
dc->clear_imm = 0;
|
| 683 |
} |
| 684 |
|
| 685 |
static inline void gen_load(DisasContext *dc, TCGv dst, TCGv addr, |
| 686 |
unsigned int size) |
| 687 |
{
|
| 688 |
int mem_index = cpu_mmu_index(dc->env);
|
| 689 |
|
| 690 |
if (size == 1) { |
| 691 |
tcg_gen_qemu_ld8u(dst, addr, mem_index); |
| 692 |
} else if (size == 2) { |
| 693 |
tcg_gen_qemu_ld16u(dst, addr, mem_index); |
| 694 |
} else if (size == 4) { |
| 695 |
tcg_gen_qemu_ld32u(dst, addr, mem_index); |
| 696 |
} else
|
| 697 |
cpu_abort(dc->env, "Incorrect load size %d\n", size);
|
| 698 |
} |
| 699 |
|
| 700 |
static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t) |
| 701 |
{
|
| 702 |
unsigned int extimm = dc->tb_flags & IMM_FLAG; |
| 703 |
|
| 704 |
/* Treat the fast cases first. */
|
| 705 |
if (!dc->type_b) {
|
| 706 |
*t = tcg_temp_new(); |
| 707 |
tcg_gen_add_tl(*t, cpu_R[dc->ra], cpu_R[dc->rb]); |
| 708 |
return t;
|
| 709 |
} |
| 710 |
/* Immediate. */
|
| 711 |
if (!extimm) {
|
| 712 |
if (dc->imm == 0) { |
| 713 |
return &cpu_R[dc->ra];
|
| 714 |
} |
| 715 |
*t = tcg_temp_new(); |
| 716 |
tcg_gen_movi_tl(*t, (int32_t)((int16_t)dc->imm)); |
| 717 |
tcg_gen_add_tl(*t, cpu_R[dc->ra], *t); |
| 718 |
} else {
|
| 719 |
*t = tcg_temp_new(); |
| 720 |
tcg_gen_add_tl(*t, cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
| 721 |
} |
| 722 |
|
| 723 |
return t;
|
| 724 |
} |
| 725 |
|
| 726 |
static void dec_load(DisasContext *dc) |
| 727 |
{
|
| 728 |
TCGv t, *addr; |
| 729 |
unsigned int size; |
| 730 |
|
| 731 |
size = 1 << (dc->opcode & 3); |
| 732 |
|
| 733 |
LOG_DIS("l %x %d\n", dc->opcode, size);
|
| 734 |
t_sync_flags(dc); |
| 735 |
addr = compute_ldst_addr(dc, &t); |
| 736 |
|
| 737 |
/* If we get a fault on a dslot, the jmpstate better be in sync. */
|
| 738 |
sync_jmpstate(dc); |
| 739 |
if (dc->rd)
|
| 740 |
gen_load(dc, cpu_R[dc->rd], *addr, size); |
| 741 |
else {
|
| 742 |
gen_load(dc, env_imm, *addr, size); |
| 743 |
} |
| 744 |
|
| 745 |
if (addr == &t)
|
| 746 |
tcg_temp_free(t); |
| 747 |
} |
| 748 |
|
| 749 |
static void gen_store(DisasContext *dc, TCGv addr, TCGv val, |
| 750 |
unsigned int size) |
| 751 |
{
|
| 752 |
int mem_index = cpu_mmu_index(dc->env);
|
| 753 |
|
| 754 |
if (size == 1) |
| 755 |
tcg_gen_qemu_st8(val, addr, mem_index); |
| 756 |
else if (size == 2) { |
| 757 |
tcg_gen_qemu_st16(val, addr, mem_index); |
| 758 |
} else if (size == 4) { |
| 759 |
tcg_gen_qemu_st32(val, addr, mem_index); |
| 760 |
} else
|
| 761 |
cpu_abort(dc->env, "Incorrect store size %d\n", size);
|
| 762 |
} |
| 763 |
|
| 764 |
static void dec_store(DisasContext *dc) |
| 765 |
{
|
| 766 |
TCGv t, *addr; |
| 767 |
unsigned int size; |
| 768 |
|
| 769 |
size = 1 << (dc->opcode & 3); |
| 770 |
|
| 771 |
LOG_DIS("s%d%s\n", size, dc->type_b ? "i" : ""); |
| 772 |
t_sync_flags(dc); |
| 773 |
/* If we get a fault on a dslot, the jmpstate better be in sync. */
|
| 774 |
sync_jmpstate(dc); |
| 775 |
addr = compute_ldst_addr(dc, &t); |
| 776 |
gen_store(dc, *addr, cpu_R[dc->rd], size); |
| 777 |
if (addr == &t)
|
| 778 |
tcg_temp_free(t); |
| 779 |
} |
| 780 |
|
| 781 |
static inline void eval_cc(DisasContext *dc, unsigned int cc, |
| 782 |
TCGv d, TCGv a, TCGv b) |
| 783 |
{
|
| 784 |
int l1;
|
| 785 |
|
| 786 |
switch (cc) {
|
| 787 |
case CC_EQ:
|
| 788 |
l1 = gen_new_label(); |
| 789 |
tcg_gen_movi_tl(env_btaken, 1);
|
| 790 |
tcg_gen_brcond_tl(TCG_COND_EQ, a, b, l1); |
| 791 |
tcg_gen_movi_tl(env_btaken, 0);
|
| 792 |
gen_set_label(l1); |
| 793 |
break;
|
| 794 |
case CC_NE:
|
| 795 |
l1 = gen_new_label(); |
| 796 |
tcg_gen_movi_tl(env_btaken, 1);
|
| 797 |
tcg_gen_brcond_tl(TCG_COND_NE, a, b, l1); |
| 798 |
tcg_gen_movi_tl(env_btaken, 0);
|
| 799 |
gen_set_label(l1); |
| 800 |
break;
|
| 801 |
case CC_LT:
|
| 802 |
l1 = gen_new_label(); |
| 803 |
tcg_gen_movi_tl(env_btaken, 1);
|
| 804 |
tcg_gen_brcond_tl(TCG_COND_LT, a, b, l1); |
| 805 |
tcg_gen_movi_tl(env_btaken, 0);
|
| 806 |
gen_set_label(l1); |
| 807 |
break;
|
| 808 |
case CC_LE:
|
| 809 |
l1 = gen_new_label(); |
| 810 |
tcg_gen_movi_tl(env_btaken, 1);
|
| 811 |
tcg_gen_brcond_tl(TCG_COND_LE, a, b, l1); |
| 812 |
tcg_gen_movi_tl(env_btaken, 0);
|
| 813 |
gen_set_label(l1); |
| 814 |
break;
|
| 815 |
case CC_GE:
|
| 816 |
l1 = gen_new_label(); |
| 817 |
tcg_gen_movi_tl(env_btaken, 1);
|
| 818 |
tcg_gen_brcond_tl(TCG_COND_GE, a, b, l1); |
| 819 |
tcg_gen_movi_tl(env_btaken, 0);
|
| 820 |
gen_set_label(l1); |
| 821 |
break;
|
| 822 |
case CC_GT:
|
| 823 |
l1 = gen_new_label(); |
| 824 |
tcg_gen_movi_tl(env_btaken, 1);
|
| 825 |
tcg_gen_brcond_tl(TCG_COND_GT, a, b, l1); |
| 826 |
tcg_gen_movi_tl(env_btaken, 0);
|
| 827 |
gen_set_label(l1); |
| 828 |
break;
|
| 829 |
default:
|
| 830 |
cpu_abort(dc->env, "Unknown condition code %x.\n", cc);
|
| 831 |
break;
|
| 832 |
} |
| 833 |
} |
| 834 |
|
| 835 |
static void eval_cond_jmp(DisasContext *dc, TCGv pc_true, TCGv pc_false) |
| 836 |
{
|
| 837 |
int l1;
|
| 838 |
|
| 839 |
l1 = gen_new_label(); |
| 840 |
/* Conditional jmp. */
|
| 841 |
tcg_gen_mov_tl(cpu_SR[SR_PC], pc_false); |
| 842 |
tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
|
| 843 |
tcg_gen_mov_tl(cpu_SR[SR_PC], pc_true); |
| 844 |
gen_set_label(l1); |
| 845 |
} |
| 846 |
|
| 847 |
static void dec_bcc(DisasContext *dc) |
| 848 |
{
|
| 849 |
unsigned int cc; |
| 850 |
unsigned int dslot; |
| 851 |
|
| 852 |
cc = EXTRACT_FIELD(dc->ir, 21, 23); |
| 853 |
dslot = dc->ir & (1 << 25); |
| 854 |
LOG_DIS("bcc%s r%d %x\n", dslot ? "d" : "", dc->ra, dc->imm); |
| 855 |
|
| 856 |
dc->delayed_branch = 1;
|
| 857 |
if (dslot) {
|
| 858 |
dc->delayed_branch = 2;
|
| 859 |
dc->tb_flags |= D_FLAG; |
| 860 |
tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)), |
| 861 |
cpu_env, offsetof(CPUState, bimm)); |
| 862 |
} |
| 863 |
|
| 864 |
tcg_gen_movi_tl(env_btarget, dc->pc); |
| 865 |
tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc))); |
| 866 |
eval_cc(dc, cc, env_btaken, cpu_R[dc->ra], tcg_const_tl(0));
|
| 867 |
dc->jmp = JMP_INDIRECT; |
| 868 |
} |
| 869 |
|
| 870 |
static void dec_br(DisasContext *dc) |
| 871 |
{
|
| 872 |
unsigned int dslot, link, abs; |
| 873 |
|
| 874 |
dslot = dc->ir & (1 << 20); |
| 875 |
abs = dc->ir & (1 << 19); |
| 876 |
link = dc->ir & (1 << 18); |
| 877 |
LOG_DIS("br%s%s%s%s imm=%x\n",
|
| 878 |
abs ? "a" : "", link ? "l" : "", |
| 879 |
dc->type_b ? "i" : "", dslot ? "d" : "", |
| 880 |
dc->imm); |
| 881 |
|
| 882 |
dc->delayed_branch = 1;
|
| 883 |
if (dslot) {
|
| 884 |
dc->delayed_branch = 2;
|
| 885 |
dc->tb_flags |= D_FLAG; |
| 886 |
tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)), |
| 887 |
cpu_env, offsetof(CPUState, bimm)); |
| 888 |
} |
| 889 |
if (link && dc->rd)
|
| 890 |
tcg_gen_movi_tl(cpu_R[dc->rd], dc->pc); |
| 891 |
|
| 892 |
dc->jmp = JMP_INDIRECT; |
| 893 |
if (abs) {
|
| 894 |
tcg_gen_movi_tl(env_btaken, 1);
|
| 895 |
tcg_gen_mov_tl(env_btarget, *(dec_alu_op_b(dc))); |
| 896 |
if (link && !(dc->tb_flags & IMM_FLAG)
|
| 897 |
&& (dc->imm == 8 || dc->imm == 0x18)) |
| 898 |
t_gen_raise_exception(dc, EXCP_BREAK); |
| 899 |
if (dc->imm == 0) |
| 900 |
t_gen_raise_exception(dc, EXCP_DEBUG); |
| 901 |
} else {
|
| 902 |
if (dc->tb_flags & IMM_FLAG) {
|
| 903 |
tcg_gen_movi_tl(env_btaken, 1);
|
| 904 |
tcg_gen_movi_tl(env_btarget, dc->pc); |
| 905 |
tcg_gen_add_tl(env_btarget, env_btarget, *(dec_alu_op_b(dc))); |
| 906 |
} else {
|
| 907 |
dc->jmp = JMP_DIRECT; |
| 908 |
dc->jmp_pc = dc->pc + (int32_t)((int16_t)dc->imm); |
| 909 |
} |
| 910 |
} |
| 911 |
} |
| 912 |
|
| 913 |
static inline void do_rti(DisasContext *dc) |
| 914 |
{
|
| 915 |
TCGv t0, t1; |
| 916 |
t0 = tcg_temp_new(); |
| 917 |
t1 = tcg_temp_new(); |
| 918 |
tcg_gen_shri_tl(t0, cpu_SR[SR_MSR], 1);
|
| 919 |
tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_IE); |
| 920 |
tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM)); |
| 921 |
|
| 922 |
tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM)); |
| 923 |
tcg_gen_or_tl(t1, t1, t0); |
| 924 |
msr_write(dc, t1); |
| 925 |
tcg_temp_free(t1); |
| 926 |
tcg_temp_free(t0); |
| 927 |
dc->tb_flags &= ~DRTI_FLAG; |
| 928 |
} |
| 929 |
|
| 930 |
static inline void do_rtb(DisasContext *dc) |
| 931 |
{
|
| 932 |
TCGv t0, t1; |
| 933 |
t0 = tcg_temp_new(); |
| 934 |
t1 = tcg_temp_new(); |
| 935 |
tcg_gen_andi_tl(t1, cpu_SR[SR_MSR], ~MSR_BIP); |
| 936 |
tcg_gen_shri_tl(t0, t1, 1);
|
| 937 |
tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM)); |
| 938 |
|
| 939 |
tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM)); |
| 940 |
tcg_gen_or_tl(t1, t1, t0); |
| 941 |
msr_write(dc, t1); |
| 942 |
tcg_temp_free(t1); |
| 943 |
tcg_temp_free(t0); |
| 944 |
dc->tb_flags &= ~DRTB_FLAG; |
| 945 |
} |
| 946 |
|
| 947 |
static inline void do_rte(DisasContext *dc) |
| 948 |
{
|
| 949 |
TCGv t0, t1; |
| 950 |
t0 = tcg_temp_new(); |
| 951 |
t1 = tcg_temp_new(); |
| 952 |
|
| 953 |
tcg_gen_ori_tl(t1, cpu_SR[SR_MSR], MSR_EE); |
| 954 |
tcg_gen_andi_tl(t1, t1, ~MSR_EIP); |
| 955 |
tcg_gen_shri_tl(t0, t1, 1);
|
| 956 |
tcg_gen_andi_tl(t0, t0, (MSR_VM | MSR_UM)); |
| 957 |
|
| 958 |
tcg_gen_andi_tl(t1, t1, ~(MSR_VM | MSR_UM)); |
| 959 |
tcg_gen_or_tl(t1, t1, t0); |
| 960 |
msr_write(dc, t1); |
| 961 |
tcg_temp_free(t1); |
| 962 |
tcg_temp_free(t0); |
| 963 |
dc->tb_flags &= ~DRTE_FLAG; |
| 964 |
} |
| 965 |
|
| 966 |
static void dec_rts(DisasContext *dc) |
| 967 |
{
|
| 968 |
unsigned int b_bit, i_bit, e_bit; |
| 969 |
|
| 970 |
i_bit = dc->ir & (1 << 21); |
| 971 |
b_bit = dc->ir & (1 << 22); |
| 972 |
e_bit = dc->ir & (1 << 23); |
| 973 |
|
| 974 |
dc->delayed_branch = 2;
|
| 975 |
dc->tb_flags |= D_FLAG; |
| 976 |
tcg_gen_st_tl(tcg_const_tl(dc->type_b && (dc->tb_flags & IMM_FLAG)), |
| 977 |
cpu_env, offsetof(CPUState, bimm)); |
| 978 |
|
| 979 |
if (i_bit) {
|
| 980 |
LOG_DIS("rtid ir=%x\n", dc->ir);
|
| 981 |
dc->tb_flags |= DRTI_FLAG; |
| 982 |
} else if (b_bit) { |
| 983 |
LOG_DIS("rtbd ir=%x\n", dc->ir);
|
| 984 |
dc->tb_flags |= DRTB_FLAG; |
| 985 |
} else if (e_bit) { |
| 986 |
LOG_DIS("rted ir=%x\n", dc->ir);
|
| 987 |
dc->tb_flags |= DRTE_FLAG; |
| 988 |
} else
|
| 989 |
LOG_DIS("rts ir=%x\n", dc->ir);
|
| 990 |
|
| 991 |
tcg_gen_movi_tl(env_btaken, 1);
|
| 992 |
tcg_gen_add_tl(env_btarget, cpu_R[dc->ra], *(dec_alu_op_b(dc))); |
| 993 |
} |
| 994 |
|
| 995 |
static void dec_null(DisasContext *dc) |
| 996 |
{
|
| 997 |
qemu_log ("unknown insn pc=%x opc=%x\n", dc->pc, dc->opcode);
|
| 998 |
dc->abort_at_next_insn = 1;
|
| 999 |
} |
| 1000 |
|
| 1001 |
static struct decoder_info { |
| 1002 |
struct {
|
| 1003 |
uint32_t bits; |
| 1004 |
uint32_t mask; |
| 1005 |
}; |
| 1006 |
void (*dec)(DisasContext *dc);
|
| 1007 |
} decinfo[] = {
|
| 1008 |
{DEC_ADD, dec_add},
|
| 1009 |
{DEC_SUB, dec_sub},
|
| 1010 |
{DEC_AND, dec_and},
|
| 1011 |
{DEC_XOR, dec_xor},
|
| 1012 |
{DEC_OR, dec_or},
|
| 1013 |
{DEC_BIT, dec_bit},
|
| 1014 |
{DEC_BARREL, dec_barrel},
|
| 1015 |
{DEC_LD, dec_load},
|
| 1016 |
{DEC_ST, dec_store},
|
| 1017 |
{DEC_IMM, dec_imm},
|
| 1018 |
{DEC_BR, dec_br},
|
| 1019 |
{DEC_BCC, dec_bcc},
|
| 1020 |
{DEC_RTS, dec_rts},
|
| 1021 |
{DEC_MUL, dec_mul},
|
| 1022 |
{DEC_DIV, dec_div},
|
| 1023 |
{DEC_MSR, dec_msr},
|
| 1024 |
{{0, 0}, dec_null}
|
| 1025 |
}; |
| 1026 |
|
| 1027 |
static inline void decode(DisasContext *dc) |
| 1028 |
{
|
| 1029 |
uint32_t ir; |
| 1030 |
int i;
|
| 1031 |
|
| 1032 |
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP)))
|
| 1033 |
tcg_gen_debug_insn_start(dc->pc); |
| 1034 |
|
| 1035 |
dc->ir = ir = ldl_code(dc->pc); |
| 1036 |
LOG_DIS("%8.8x\t", dc->ir);
|
| 1037 |
|
| 1038 |
if (dc->ir)
|
| 1039 |
dc->nr_nops = 0;
|
| 1040 |
else {
|
| 1041 |
LOG_DIS("nr_nops=%d\t", dc->nr_nops);
|
| 1042 |
dc->nr_nops++; |
| 1043 |
if (dc->nr_nops > 4) |
| 1044 |
cpu_abort(dc->env, "fetching nop sequence\n");
|
| 1045 |
} |
| 1046 |
/* bit 2 seems to indicate insn type. */
|
| 1047 |
dc->type_b = ir & (1 << 29); |
| 1048 |
|
| 1049 |
dc->opcode = EXTRACT_FIELD(ir, 26, 31); |
| 1050 |
dc->rd = EXTRACT_FIELD(ir, 21, 25); |
| 1051 |
dc->ra = EXTRACT_FIELD(ir, 16, 20); |
| 1052 |
dc->rb = EXTRACT_FIELD(ir, 11, 15); |
| 1053 |
dc->imm = EXTRACT_FIELD(ir, 0, 15); |
| 1054 |
|
| 1055 |
/* Large switch for all insns. */
|
| 1056 |
for (i = 0; i < ARRAY_SIZE(decinfo); i++) { |
| 1057 |
if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) {
|
| 1058 |
decinfo[i].dec(dc); |
| 1059 |
break;
|
| 1060 |
} |
| 1061 |
} |
| 1062 |
} |
| 1063 |
|
| 1064 |
|
| 1065 |
static void check_breakpoint(CPUState *env, DisasContext *dc) |
| 1066 |
{
|
| 1067 |
CPUBreakpoint *bp; |
| 1068 |
|
| 1069 |
if (unlikely(!TAILQ_EMPTY(&env->breakpoints))) {
|
| 1070 |
TAILQ_FOREACH(bp, &env->breakpoints, entry) {
|
| 1071 |
if (bp->pc == dc->pc) {
|
| 1072 |
t_gen_raise_exception(dc, EXCP_DEBUG); |
| 1073 |
dc->is_jmp = DISAS_UPDATE; |
| 1074 |
} |
| 1075 |
} |
| 1076 |
} |
| 1077 |
} |
| 1078 |
|
| 1079 |
/* generate intermediate code for basic block 'tb'. */
|
| 1080 |
static void |
| 1081 |
gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb, |
| 1082 |
int search_pc)
|
| 1083 |
{
|
| 1084 |
uint16_t *gen_opc_end; |
| 1085 |
uint32_t pc_start; |
| 1086 |
int j, lj;
|
| 1087 |
struct DisasContext ctx;
|
| 1088 |
struct DisasContext *dc = &ctx;
|
| 1089 |
uint32_t next_page_start, org_flags; |
| 1090 |
target_ulong npc; |
| 1091 |
int num_insns;
|
| 1092 |
int max_insns;
|
| 1093 |
|
| 1094 |
qemu_log_try_set_file(stderr); |
| 1095 |
|
| 1096 |
pc_start = tb->pc; |
| 1097 |
dc->env = env; |
| 1098 |
dc->tb = tb; |
| 1099 |
org_flags = dc->synced_flags = dc->tb_flags = tb->flags; |
| 1100 |
|
| 1101 |
gen_opc_end = gen_opc_buf + OPC_MAX_SIZE; |
| 1102 |
|
| 1103 |
dc->is_jmp = DISAS_NEXT; |
| 1104 |
dc->jmp = 0;
|
| 1105 |
dc->delayed_branch = !!(dc->tb_flags & D_FLAG); |
| 1106 |
dc->ppc = pc_start; |
| 1107 |
dc->pc = pc_start; |
| 1108 |
dc->cache_pc = -1;
|
| 1109 |
dc->singlestep_enabled = env->singlestep_enabled; |
| 1110 |
dc->cpustate_changed = 0;
|
| 1111 |
dc->abort_at_next_insn = 0;
|
| 1112 |
dc->nr_nops = 0;
|
| 1113 |
|
| 1114 |
if (pc_start & 3) |
| 1115 |
cpu_abort(env, "Microblaze: unaligned PC=%x\n", pc_start);
|
| 1116 |
|
| 1117 |
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
|
| 1118 |
#if !SIM_COMPAT
|
| 1119 |
qemu_log("--------------\n");
|
| 1120 |
log_cpu_state(env, 0);
|
| 1121 |
#endif
|
| 1122 |
} |
| 1123 |
|
| 1124 |
next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE; |
| 1125 |
lj = -1;
|
| 1126 |
num_insns = 0;
|
| 1127 |
max_insns = tb->cflags & CF_COUNT_MASK; |
| 1128 |
if (max_insns == 0) |
| 1129 |
max_insns = CF_COUNT_MASK; |
| 1130 |
|
| 1131 |
gen_icount_start(); |
| 1132 |
do
|
| 1133 |
{
|
| 1134 |
#if SIM_COMPAT
|
| 1135 |
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
|
| 1136 |
tcg_gen_movi_tl(cpu_SR[SR_PC], dc->pc); |
| 1137 |
gen_helper_debug(); |
| 1138 |
} |
| 1139 |
#endif
|
| 1140 |
check_breakpoint(env, dc); |
| 1141 |
|
| 1142 |
if (search_pc) {
|
| 1143 |
j = gen_opc_ptr - gen_opc_buf; |
| 1144 |
if (lj < j) {
|
| 1145 |
lj++; |
| 1146 |
while (lj < j)
|
| 1147 |
gen_opc_instr_start[lj++] = 0;
|
| 1148 |
} |
| 1149 |
gen_opc_pc[lj] = dc->pc; |
| 1150 |
gen_opc_instr_start[lj] = 1;
|
| 1151 |
gen_opc_icount[lj] = num_insns; |
| 1152 |
} |
| 1153 |
|
| 1154 |
/* Pretty disas. */
|
| 1155 |
LOG_DIS("%8.8x:\t", dc->pc);
|
| 1156 |
|
| 1157 |
if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) |
| 1158 |
gen_io_start(); |
| 1159 |
|
| 1160 |
dc->clear_imm = 1;
|
| 1161 |
decode(dc); |
| 1162 |
if (dc->clear_imm)
|
| 1163 |
dc->tb_flags &= ~IMM_FLAG; |
| 1164 |
dc->ppc = dc->pc; |
| 1165 |
dc->pc += 4;
|
| 1166 |
num_insns++; |
| 1167 |
|
| 1168 |
if (dc->delayed_branch) {
|
| 1169 |
dc->delayed_branch--; |
| 1170 |
if (!dc->delayed_branch) {
|
| 1171 |
if (dc->tb_flags & DRTI_FLAG)
|
| 1172 |
do_rti(dc); |
| 1173 |
if (dc->tb_flags & DRTB_FLAG)
|
| 1174 |
do_rtb(dc); |
| 1175 |
if (dc->tb_flags & DRTE_FLAG)
|
| 1176 |
do_rte(dc); |
| 1177 |
/* Clear the delay slot flag. */
|
| 1178 |
dc->tb_flags &= ~D_FLAG; |
| 1179 |
/* If it is a direct jump, try direct chaining. */
|
| 1180 |
if (dc->jmp != JMP_DIRECT) {
|
| 1181 |
eval_cond_jmp(dc, env_btarget, tcg_const_tl(dc->pc)); |
| 1182 |
dc->is_jmp = DISAS_JUMP; |
| 1183 |
} |
| 1184 |
break;
|
| 1185 |
} |
| 1186 |
} |
| 1187 |
if (env->singlestep_enabled)
|
| 1188 |
break;
|
| 1189 |
} while (!dc->is_jmp && !dc->cpustate_changed
|
| 1190 |
&& gen_opc_ptr < gen_opc_end |
| 1191 |
&& !singlestep |
| 1192 |
&& (dc->pc < next_page_start) |
| 1193 |
&& num_insns < max_insns); |
| 1194 |
|
| 1195 |
npc = dc->pc; |
| 1196 |
if (dc->jmp == JMP_DIRECT) {
|
| 1197 |
if (dc->tb_flags & D_FLAG) {
|
| 1198 |
dc->is_jmp = DISAS_UPDATE; |
| 1199 |
tcg_gen_movi_tl(cpu_SR[SR_PC], npc); |
| 1200 |
sync_jmpstate(dc); |
| 1201 |
} else
|
| 1202 |
npc = dc->jmp_pc; |
| 1203 |
} |
| 1204 |
|
| 1205 |
if (tb->cflags & CF_LAST_IO)
|
| 1206 |
gen_io_end(); |
| 1207 |
/* Force an update if the per-tb cpu state has changed. */
|
| 1208 |
if (dc->is_jmp == DISAS_NEXT
|
| 1209 |
&& (dc->cpustate_changed || org_flags != dc->tb_flags)) {
|
| 1210 |
dc->is_jmp = DISAS_UPDATE; |
| 1211 |
tcg_gen_movi_tl(cpu_SR[SR_PC], npc); |
| 1212 |
} |
| 1213 |
t_sync_flags(dc); |
| 1214 |
|
| 1215 |
if (unlikely(env->singlestep_enabled)) {
|
| 1216 |
t_gen_raise_exception(dc, EXCP_DEBUG); |
| 1217 |
if (dc->is_jmp == DISAS_NEXT)
|
| 1218 |
tcg_gen_movi_tl(cpu_SR[SR_PC], npc); |
| 1219 |
} else {
|
| 1220 |
switch(dc->is_jmp) {
|
| 1221 |
case DISAS_NEXT:
|
| 1222 |
gen_goto_tb(dc, 1, npc);
|
| 1223 |
break;
|
| 1224 |
default:
|
| 1225 |
case DISAS_JUMP:
|
| 1226 |
case DISAS_UPDATE:
|
| 1227 |
/* indicate that the hash table must be used
|
| 1228 |
to find the next TB */
|
| 1229 |
tcg_gen_exit_tb(0);
|
| 1230 |
break;
|
| 1231 |
case DISAS_TB_JUMP:
|
| 1232 |
/* nothing more to generate */
|
| 1233 |
break;
|
| 1234 |
} |
| 1235 |
} |
| 1236 |
gen_icount_end(tb, num_insns); |
| 1237 |
*gen_opc_ptr = INDEX_op_end; |
| 1238 |
if (search_pc) {
|
| 1239 |
j = gen_opc_ptr - gen_opc_buf; |
| 1240 |
lj++; |
| 1241 |
while (lj <= j)
|
| 1242 |
gen_opc_instr_start[lj++] = 0;
|
| 1243 |
} else {
|
| 1244 |
tb->size = dc->pc - pc_start; |
| 1245 |
tb->icount = num_insns; |
| 1246 |
} |
| 1247 |
|
| 1248 |
#ifdef DEBUG_DISAS
|
| 1249 |
#if !SIM_COMPAT
|
| 1250 |
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
|
| 1251 |
qemu_log("\n");
|
| 1252 |
#if DISAS_GNU
|
| 1253 |
log_target_disas(pc_start, dc->pc - pc_start, 0);
|
| 1254 |
#endif
|
| 1255 |
qemu_log("\nisize=%d osize=%zd\n",
|
| 1256 |
dc->pc - pc_start, gen_opc_ptr - gen_opc_buf); |
| 1257 |
} |
| 1258 |
#endif
|
| 1259 |
#endif
|
| 1260 |
assert(!dc->abort_at_next_insn); |
| 1261 |
} |
| 1262 |
|
| 1263 |
void gen_intermediate_code (CPUState *env, struct TranslationBlock *tb) |
| 1264 |
{
|
| 1265 |
gen_intermediate_code_internal(env, tb, 0);
|
| 1266 |
} |
| 1267 |
|
| 1268 |
void gen_intermediate_code_pc (CPUState *env, struct TranslationBlock *tb) |
| 1269 |
{
|
| 1270 |
gen_intermediate_code_internal(env, tb, 1);
|
| 1271 |
} |
| 1272 |
|
| 1273 |
void cpu_dump_state (CPUState *env, FILE *f,
|
| 1274 |
int (*cpu_fprintf)(FILE *f, const char *fmt, ...), |
| 1275 |
int flags)
|
| 1276 |
{
|
| 1277 |
int i;
|
| 1278 |
|
| 1279 |
if (!env || !f)
|
| 1280 |
return;
|
| 1281 |
|
| 1282 |
cpu_fprintf(f, "IN: PC=%x %s\n",
|
| 1283 |
env->sregs[SR_PC], lookup_symbol(env->sregs[SR_PC])); |
| 1284 |
cpu_fprintf(f, "rmsr=%x resr=%x debug[%x] imm=%x iflags=%x\n",
|
| 1285 |
env->sregs[SR_MSR], env->sregs[SR_ESR], |
| 1286 |
env->debug, env->imm, env->iflags); |
| 1287 |
cpu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s)\n",
|
| 1288 |
env->btaken, env->btarget, |
| 1289 |
(env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel", |
| 1290 |
(env->sregs[SR_MSR] & MSR_UMS) ? "user" : "kernel"); |
| 1291 |
for (i = 0; i < 32; i++) { |
| 1292 |
cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
|
| 1293 |
if ((i + 1) % 4 == 0) |
| 1294 |
cpu_fprintf(f, "\n");
|
| 1295 |
} |
| 1296 |
cpu_fprintf(f, "\n\n");
|
| 1297 |
} |
| 1298 |
|
| 1299 |
CPUState *cpu_mb_init (const char *cpu_model) |
| 1300 |
{
|
| 1301 |
CPUState *env; |
| 1302 |
static int tcg_initialized = 0; |
| 1303 |
int i;
|
| 1304 |
|
| 1305 |
env = qemu_mallocz(sizeof(CPUState));
|
| 1306 |
|
| 1307 |
cpu_exec_init(env); |
| 1308 |
cpu_reset(env); |
| 1309 |
|
| 1310 |
env->pvr.regs[0] = PVR0_PVR_FULL_MASK \
|
| 1311 |
| PVR0_USE_BARREL_MASK \ |
| 1312 |
| PVR0_USE_DIV_MASK \ |
| 1313 |
| PVR0_USE_HW_MUL_MASK \ |
| 1314 |
| PVR0_USE_EXC_MASK \ |
| 1315 |
| PVR0_USE_ICACHE_MASK \ |
| 1316 |
| PVR0_USE_DCACHE_MASK \ |
| 1317 |
| PVR0_USE_MMU \ |
| 1318 |
| (0xb << 8); |
| 1319 |
env->pvr.regs[2] = PVR2_D_OPB_MASK \
|
| 1320 |
| PVR2_D_LMB_MASK \ |
| 1321 |
| PVR2_I_OPB_MASK \ |
| 1322 |
| PVR2_I_LMB_MASK \ |
| 1323 |
| PVR2_USE_MSR_INSTR \ |
| 1324 |
| PVR2_USE_PCMP_INSTR \ |
| 1325 |
| PVR2_USE_BARREL_MASK \ |
| 1326 |
| PVR2_USE_DIV_MASK \ |
| 1327 |
| PVR2_USE_HW_MUL_MASK \ |
| 1328 |
| PVR2_USE_MUL64_MASK \ |
| 1329 |
| 0;
|
| 1330 |
env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family. */ |
| 1331 |
env->pvr.regs[11] = PVR11_USE_MMU;
|
| 1332 |
|
| 1333 |
if (tcg_initialized)
|
| 1334 |
return env;
|
| 1335 |
|
| 1336 |
tcg_initialized = 1;
|
| 1337 |
|
| 1338 |
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
|
| 1339 |
|
| 1340 |
env_debug = tcg_global_mem_new(TCG_AREG0, |
| 1341 |
offsetof(CPUState, debug), |
| 1342 |
"debug0");
|
| 1343 |
env_iflags = tcg_global_mem_new(TCG_AREG0, |
| 1344 |
offsetof(CPUState, iflags), |
| 1345 |
"iflags");
|
| 1346 |
env_imm = tcg_global_mem_new(TCG_AREG0, |
| 1347 |
offsetof(CPUState, imm), |
| 1348 |
"imm");
|
| 1349 |
env_btarget = tcg_global_mem_new(TCG_AREG0, |
| 1350 |
offsetof(CPUState, btarget), |
| 1351 |
"btarget");
|
| 1352 |
env_btaken = tcg_global_mem_new(TCG_AREG0, |
| 1353 |
offsetof(CPUState, btaken), |
| 1354 |
"btaken");
|
| 1355 |
for (i = 0; i < ARRAY_SIZE(cpu_R); i++) { |
| 1356 |
cpu_R[i] = tcg_global_mem_new(TCG_AREG0, |
| 1357 |
offsetof(CPUState, regs[i]), |
| 1358 |
regnames[i]); |
| 1359 |
} |
| 1360 |
for (i = 0; i < ARRAY_SIZE(cpu_SR); i++) { |
| 1361 |
cpu_SR[i] = tcg_global_mem_new(TCG_AREG0, |
| 1362 |
offsetof(CPUState, sregs[i]), |
| 1363 |
special_regnames[i]); |
| 1364 |
} |
| 1365 |
#define GEN_HELPER 2 |
| 1366 |
#include "helper.h" |
| 1367 |
|
| 1368 |
return env;
|
| 1369 |
} |
| 1370 |
|
| 1371 |
void cpu_reset (CPUState *env)
|
| 1372 |
{
|
| 1373 |
if (qemu_loglevel_mask(CPU_LOG_RESET)) {
|
| 1374 |
qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
|
| 1375 |
log_cpu_state(env, 0);
|
| 1376 |
} |
| 1377 |
|
| 1378 |
memset(env, 0, offsetof(CPUMBState, breakpoints));
|
| 1379 |
tlb_flush(env, 1);
|
| 1380 |
|
| 1381 |
env->sregs[SR_MSR] = 0;
|
| 1382 |
#if defined(CONFIG_USER_ONLY)
|
| 1383 |
/* start in user mode with interrupts enabled. */
|
| 1384 |
env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp. */ |
| 1385 |
#else
|
| 1386 |
mmu_init(&env->mmu); |
| 1387 |
#endif
|
| 1388 |
} |
| 1389 |
|
| 1390 |
void gen_pc_load(CPUState *env, struct TranslationBlock *tb, |
| 1391 |
unsigned long searched_pc, int pc_pos, void *puc) |
| 1392 |
{
|
| 1393 |
env->sregs[SR_PC] = gen_opc_pc[pc_pos]; |
| 1394 |
} |