CRIS: Fix brk 8 and add S-flag emulation.
* break 8 sets ERP to the current insn. * First shot at S flag single-stepping. * Make it easier to use the local disasm. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5445 c046a42c-6fe2-441c-8c8c-71466251a162
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edgar_igl
parent
890b165890
commit
a1aebcb8e6
@ -220,7 +220,7 @@ static inline TranslationBlock *tb_find_fast(void)
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cs_base = 0;
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pc = env->pc;
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#elif defined(TARGET_CRIS)
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flags = env->pregs[PR_CCS] & (P_FLAG | U_FLAG | X_FLAG);
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flags = env->pregs[PR_CCS] & (S_FLAG | P_FLAG | U_FLAG | X_FLAG);
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flags |= env->dslot;
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cs_base = 0;
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pc = env->pc;
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@ -119,7 +119,7 @@ void do_interrupt(CPUState *env)
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/* These exceptions are genereated by the core itself.
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ERP should point to the insn following the brk. */
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ex_vec = env->trap_vector;
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env->pregs[PR_ERP] = env->pc + 2;
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env->pregs[PR_ERP] = env->pc;
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break;
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case EXCP_NMI:
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@ -2,6 +2,7 @@
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void TCG_HELPER_PROTO helper_raise_exception(uint32_t index);
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void TCG_HELPER_PROTO helper_tlb_flush_pid(uint32_t pid);
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void TCG_HELPER_PROTO helper_spc_write(uint32_t pid);
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void TCG_HELPER_PROTO helper_dump(uint32_t a0, uint32_t a1, uint32_t a2);
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void TCG_HELPER_PROTO helper_rfe(void);
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void TCG_HELPER_PROTO helper_rfn(void);
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@ -97,6 +97,14 @@ void helper_tlb_flush_pid(uint32_t pid)
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#endif
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}
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void helper_spc_write(uint32_t new_spc)
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{
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#if !defined(CONFIG_USER_ONLY)
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tlb_flush_page(env, env->pregs[PR_SPC]);
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tlb_flush_page(env, new_spc);
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#endif
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}
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void helper_dump(uint32_t a0, uint32_t a1, uint32_t a2)
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{
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(fprintf(logfile, "%s: a0=%x a1=%x\n", __func__, a0, a1));
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@ -41,7 +41,7 @@
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#define DISAS_CRIS 0
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#if DISAS_CRIS
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#define DIS(x) x
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#define DIS(x) if (loglevel & CPU_LOG_TB_IN_ASM) x
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#else
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#define DIS(x)
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#endif
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@ -218,6 +218,8 @@ static inline void t_gen_mov_preg_TN(DisasContext *dc, int r, TCGv tn)
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else {
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if (r == PR_PID)
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tcg_gen_helper_0_1(helper_tlb_flush_pid, tn);
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if (dc->tb_flags & S_FLAG && r == PR_SPC)
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tcg_gen_helper_0_1(helper_spc_write, tn);
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else if (r == PR_CCS)
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dc->cpustate_changed = 1;
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tcg_gen_mov_tl(cpu_PR[r], tn);
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@ -1377,8 +1379,6 @@ static int dec_prep_move_m(DisasContext *dc, int s_ext, int memsize,
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} else
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imm = ldl_code(dc->pc + 2);
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DIS(fprintf (logfile, "imm=%x rd=%d sext=%d ms=%d\n",
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imm, rd, s_ext, memsize));
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tcg_gen_movi_tl(dst, imm);
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dc->postinc = 0;
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} else {
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@ -2063,7 +2063,7 @@ static unsigned int dec_setclrf(DisasContext *dc)
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/* User space is not allowed to touch these. Silently ignore. */
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if (dc->tb_flags & U_FLAG) {
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flags &= ~(I_FLAG | U_FLAG);
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flags &= ~(S_FLAG | I_FLAG | U_FLAG);
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}
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if (flags & X_FLAG) {
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@ -2083,6 +2083,9 @@ static unsigned int dec_setclrf(DisasContext *dc)
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dc->cpustate_changed = 1;
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}
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}
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if (flags & S_FLAG) {
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dc->cpustate_changed = 1;
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}
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/* Simply decode the flags. */
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@ -2784,9 +2787,6 @@ static unsigned int dec_basc_im(DisasContext *dc)
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static unsigned int dec_rfe_etc(DisasContext *dc)
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{
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DIS(fprintf (logfile, "rfe_etc opc=%x pc=0x%x op1=%d op2=%d\n",
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dc->opcode, dc->pc, dc->op1, dc->op2));
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cris_cc_mask(dc, 0);
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if (dc->op2 == 15) /* ignore halt. */
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@ -2795,19 +2795,29 @@ static unsigned int dec_rfe_etc(DisasContext *dc)
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switch (dc->op2 & 7) {
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case 2:
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/* rfe. */
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DIS(fprintf(logfile, "rfe\n"));
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cris_evaluate_flags(dc);
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tcg_gen_helper_0_0(helper_rfe);
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dc->is_jmp = DISAS_UPDATE;
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break;
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case 5:
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/* rfn. */
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DIS(fprintf(logfile, "rfn\n"));
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cris_evaluate_flags(dc);
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tcg_gen_helper_0_0(helper_rfn);
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dc->is_jmp = DISAS_UPDATE;
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break;
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case 6:
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DIS(fprintf(logfile, "break %d\n", dc->op1));
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cris_evaluate_flags (dc);
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/* break. */
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tcg_gen_movi_tl(env_pc, dc->pc);
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if (dc->op1 == 8) {
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/* TODO: Find out whats special with brk8. */
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tcg_gen_movi_tl(env_pc, dc->pc);
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}
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else
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tcg_gen_movi_tl(env_pc, dc->pc + 2);
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/* Breaks start at 16 in the exception vector. */
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t_gen_mov_env_TN(trap_vector,
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tcg_const_tl(dc->op1 + 16));
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@ -2984,6 +2994,22 @@ cris_decoder(DisasContext *dc)
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}
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}
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#if defined(CONFIG_USER_ONLY)
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/* Single-stepping ? */
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if (dc->tb_flags & S_FLAG) {
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int l1;
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l1 = gen_new_label();
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tcg_gen_brcondi_tl(TCG_COND_NE,
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cpu_PR[PR_SPC], tcg_const_tl(dc->pc), l1);
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/* We treat SPC as a break with an odd trap vector. */
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cris_evaluate_flags (dc);
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t_gen_mov_env_TN(trap_vector, tcg_const_tl(3));
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tcg_gen_movi_tl(env_pc, dc->pc + insn_len);
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t_gen_raise_exception(EXCP_BREAK);
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gen_set_label(l1);
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}
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#endif
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return insn_len;
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}
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@ -3080,7 +3106,7 @@ gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
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dc->cc_size_uptodate = -1;
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/* Decode TB flags. */
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dc->tb_flags = tb->flags & (P_FLAG | U_FLAG | X_FLAG);
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dc->tb_flags = tb->flags & (S_FLAG | P_FLAG | U_FLAG | X_FLAG);
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dc->delayed_branch = !!(tb->flags & 7);
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if (dc->delayed_branch)
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dc->jmp = JMP_INDIRECT;
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@ -3108,7 +3134,8 @@ gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
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env->regs[10], env->regs[11],
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env->regs[12], env->regs[13],
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env->regs[14], env->regs[15]);
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fprintf(logfile, "--------------\n");
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fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
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}
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next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
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@ -3139,10 +3166,7 @@ gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
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}
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/* Pretty disas. */
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DIS(fprintf(logfile, "%x ", dc->pc));
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if (search_pc) {
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DIS(fprintf(logfile, "%x ", dc->pc));
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}
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DIS(fprintf(logfile, "%8.8x:\t", dc->pc));
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if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
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gen_io_start();
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@ -3241,14 +3265,14 @@ gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
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}
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#ifdef DEBUG_DISAS
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#if !DISAS_CRIS
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if (loglevel & CPU_LOG_TB_IN_ASM) {
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fprintf(logfile, "--------------\n");
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fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
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target_disas(logfile, pc_start, dc->pc - pc_start, 0);
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fprintf(logfile, "\nisize=%d osize=%zd\n",
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dc->pc - pc_start, gen_opc_ptr - gen_opc_buf);
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}
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#endif
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#endif
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}
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void gen_intermediate_code (CPUState *env, struct TranslationBlock *tb)
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