* 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.
+ * version 2.1 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
#include "exec/exec-all.h"
#include "tcg/tcg-op.h"
#include "exec/helper-proto.h"
-#include "microblaze-decode.h"
#include "exec/cpu_ldst.h"
#include "exec/helper-gen.h"
#include "exec/translator.h"
#include "qemu/qemu-print.h"
-#include "trace-tcg.h"
#include "exec/log.h"
#define EXTRACT_FIELD(src, start, end) \
/* is_jmp field values */
#define DISAS_JUMP DISAS_TARGET_0 /* only pc was modified dynamically */
-#define DISAS_UPDATE DISAS_TARGET_1 /* cpu state was modified dynamically */
+#define DISAS_EXIT DISAS_TARGET_1 /* all cpu state modified dynamically */
+
+/* cpu state besides pc was modified dynamically; update pc to next */
+#define DISAS_EXIT_NEXT DISAS_TARGET_2
+/* cpu state besides pc was modified dynamically; update pc to btarget */
+#define DISAS_EXIT_JUMP DISAS_TARGET_3
static TCGv_i32 cpu_R[32];
static TCGv_i32 cpu_pc;
static TCGv_i32 cpu_msr;
static TCGv_i32 cpu_msr_c;
static TCGv_i32 cpu_imm;
-static TCGv_i32 cpu_btaken;
+static TCGv_i32 cpu_bvalue;
static TCGv_i32 cpu_btarget;
static TCGv_i32 cpu_iflags;
static TCGv cpu_res_addr;
/* This is the state at translation time. */
typedef struct DisasContext {
DisasContextBase base;
- MicroBlazeCPU *cpu;
+ const MicroBlazeCPUConfig *cfg;
+
+ /* TCG op of the current insn_start. */
+ TCGOp *insn_start;
TCGv_i32 r0;
bool r0_set;
/* Decoder. */
- int type_b;
- uint32_t ir;
uint32_t ext_imm;
- 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;
-
-#define JMP_NOJMP 0
-#define JMP_DIRECT 1
-#define JMP_DIRECT_CC 2
-#define JMP_INDIRECT 3
- unsigned int jmp;
- uint32_t jmp_pc;
-
- int abort_at_next_insn;
+ unsigned int tb_flags;
+ unsigned int tb_flags_to_set;
+ int mem_index;
+
+ /* Condition under which to jump, including NEVER and ALWAYS. */
+ TCGCond jmp_cond;
+
+ /* Immediate branch-taken destination, or -1 for indirect. */
+ uint32_t jmp_dest;
} DisasContext;
static int typeb_imm(DisasContext *dc, int x)
/* Include the auto-generated decoder. */
#include "decode-insns.c.inc"
-static inline void t_sync_flags(DisasContext *dc)
+static void t_sync_flags(DisasContext *dc)
{
/* Synch the tb dependent flags between translator and runtime. */
- if (dc->tb_flags != dc->synced_flags) {
- tcg_gen_movi_i32(cpu_iflags, dc->tb_flags);
- dc->synced_flags = dc->tb_flags;
+ if ((dc->tb_flags ^ dc->base.tb->flags) & IFLAGS_TB_MASK) {
+ tcg_gen_movi_i32(cpu_iflags, dc->tb_flags & IFLAGS_TB_MASK);
}
}
gen_raise_exception_sync(dc, EXCP_HW_EXCP);
}
-static inline bool use_goto_tb(DisasContext *dc, target_ulong dest)
-{
-#ifndef CONFIG_USER_ONLY
- return (dc->base.pc_first & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK);
-#else
- return true;
-#endif
-}
-
static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
{
- if (dc->base.singlestep_enabled) {
- TCGv_i32 tmp = tcg_const_i32(EXCP_DEBUG);
- tcg_gen_movi_i32(cpu_pc, dest);
- gen_helper_raise_exception(cpu_env, tmp);
- tcg_temp_free_i32(tmp);
- } else if (use_goto_tb(dc, dest)) {
+ if (translator_use_goto_tb(&dc->base, dest)) {
tcg_gen_goto_tb(n);
tcg_gen_movi_i32(cpu_pc, dest);
tcg_gen_exit_tb(dc->base.tb, n);
} else {
tcg_gen_movi_i32(cpu_pc, dest);
- tcg_gen_exit_tb(NULL, 0);
+ tcg_gen_lookup_and_goto_ptr();
}
dc->base.is_jmp = DISAS_NORETURN;
}
*/
static bool trap_illegal(DisasContext *dc, bool cond)
{
- if (cond && (dc->tb_flags & MSR_EE_FLAG)
- && dc->cpu->cfg.illegal_opcode_exception) {
+ if (cond && (dc->tb_flags & MSR_EE)
+ && dc->cfg->illegal_opcode_exception) {
gen_raise_hw_excp(dc, ESR_EC_ILLEGAL_OP);
}
return cond;
*/
static bool trap_userspace(DisasContext *dc, bool cond)
{
- int mem_index = cpu_mmu_index(&dc->cpu->env, false);
- bool cond_user = cond && mem_index == MMU_USER_IDX;
+ bool cond_user = cond && dc->mem_index == MMU_USER_IDX;
- if (cond_user && (dc->tb_flags & MSR_EE_FLAG)) {
+ if (cond_user && (dc->tb_flags & MSR_EE)) {
gen_raise_hw_excp(dc, ESR_EC_PRIVINSN);
}
return cond_user;
}
-static int32_t dec_alu_typeb_imm(DisasContext *dc)
-{
- tcg_debug_assert(dc->type_b);
- return typeb_imm(dc, (int16_t)dc->imm);
-}
-
-static inline TCGv_i32 *dec_alu_op_b(DisasContext *dc)
+/*
+ * Return true, and log an error, if the current insn is
+ * within a delay slot.
+ */
+static bool invalid_delay_slot(DisasContext *dc, const char *insn_type)
{
- if (dc->type_b) {
- tcg_gen_movi_i32(cpu_imm, dec_alu_typeb_imm(dc));
- return &cpu_imm;
+ if (dc->tb_flags & D_FLAG) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "Invalid insn in delay slot: %s at %08x\n",
+ insn_type, (uint32_t)dc->base.pc_next);
+ return true;
}
- return &cpu_R[dc->rb];
+ return false;
}
static TCGv_i32 reg_for_read(DisasContext *dc, int reg)
return true;
}
+static bool do_typea0(DisasContext *dc, arg_typea0 *arg, bool side_effects,
+ void (*fn)(TCGv_i32, TCGv_i32))
+{
+ TCGv_i32 rd, ra;
+
+ if (arg->rd == 0 && !side_effects) {
+ return true;
+ }
+
+ rd = reg_for_write(dc, arg->rd);
+ ra = reg_for_read(dc, arg->ra);
+ fn(rd, ra);
+ return true;
+}
+
static bool do_typeb_imm(DisasContext *dc, arg_typeb *arg, bool side_effects,
void (*fni)(TCGv_i32, TCGv_i32, int32_t))
{
#define DO_TYPEA_CFG(NAME, CFG, SE, FN) \
static bool trans_##NAME(DisasContext *dc, arg_typea *a) \
- { return dc->cpu->cfg.CFG && do_typea(dc, a, SE, FN); }
+ { return dc->cfg->CFG && do_typea(dc, a, SE, FN); }
+
+#define DO_TYPEA0(NAME, SE, FN) \
+ static bool trans_##NAME(DisasContext *dc, arg_typea0 *a) \
+ { return do_typea0(dc, a, SE, FN); }
+
+#define DO_TYPEA0_CFG(NAME, CFG, SE, FN) \
+ static bool trans_##NAME(DisasContext *dc, arg_typea0 *a) \
+ { return dc->cfg->CFG && do_typea0(dc, a, SE, FN); }
#define DO_TYPEBI(NAME, SE, FNI) \
static bool trans_##NAME(DisasContext *dc, arg_typeb *a) \
{ return do_typeb_imm(dc, a, SE, FNI); }
+#define DO_TYPEBI_CFG(NAME, CFG, SE, FNI) \
+ static bool trans_##NAME(DisasContext *dc, arg_typeb *a) \
+ { return dc->cfg->CFG && do_typeb_imm(dc, a, SE, FNI); }
+
#define DO_TYPEBV(NAME, SE, FN) \
static bool trans_##NAME(DisasContext *dc, arg_typeb *a) \
{ return do_typeb_val(dc, a, SE, FN); }
+#define ENV_WRAPPER2(NAME, HELPER) \
+ static void NAME(TCGv_i32 out, TCGv_i32 ina) \
+ { HELPER(out, cpu_env, ina); }
+
+#define ENV_WRAPPER3(NAME, HELPER) \
+ static void NAME(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb) \
+ { HELPER(out, cpu_env, ina, inb); }
+
/* No input carry, but output carry. */
static void gen_add(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
DO_TYPEA(andn, false, tcg_gen_andc_i32)
DO_TYPEBI(andni, false, gen_andni)
+static void gen_bsra(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
+{
+ TCGv_i32 tmp = tcg_temp_new_i32();
+ tcg_gen_andi_i32(tmp, inb, 31);
+ tcg_gen_sar_i32(out, ina, tmp);
+ tcg_temp_free_i32(tmp);
+}
+
+static void gen_bsrl(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
+{
+ TCGv_i32 tmp = tcg_temp_new_i32();
+ tcg_gen_andi_i32(tmp, inb, 31);
+ tcg_gen_shr_i32(out, ina, tmp);
+ tcg_temp_free_i32(tmp);
+}
+
+static void gen_bsll(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
+{
+ TCGv_i32 tmp = tcg_temp_new_i32();
+ tcg_gen_andi_i32(tmp, inb, 31);
+ tcg_gen_shl_i32(out, ina, tmp);
+ tcg_temp_free_i32(tmp);
+}
+
+static void gen_bsefi(TCGv_i32 out, TCGv_i32 ina, int32_t imm)
+{
+ /* Note that decodetree has extracted and reassembled imm_w/imm_s. */
+ int imm_w = extract32(imm, 5, 5);
+ int imm_s = extract32(imm, 0, 5);
+
+ if (imm_w + imm_s > 32 || imm_w == 0) {
+ /* These inputs have an undefined behavior. */
+ qemu_log_mask(LOG_GUEST_ERROR, "bsefi: Bad input w=%d s=%d\n",
+ imm_w, imm_s);
+ } else {
+ tcg_gen_extract_i32(out, ina, imm_s, imm_w);
+ }
+}
+
+static void gen_bsifi(TCGv_i32 out, TCGv_i32 ina, int32_t imm)
+{
+ /* Note that decodetree has extracted and reassembled imm_w/imm_s. */
+ int imm_w = extract32(imm, 5, 5);
+ int imm_s = extract32(imm, 0, 5);
+ int width = imm_w - imm_s + 1;
+
+ if (imm_w < imm_s) {
+ /* These inputs have an undefined behavior. */
+ qemu_log_mask(LOG_GUEST_ERROR, "bsifi: Bad input w=%d s=%d\n",
+ imm_w, imm_s);
+ } else {
+ tcg_gen_deposit_i32(out, out, ina, imm_s, width);
+ }
+}
+
+DO_TYPEA_CFG(bsra, use_barrel, false, gen_bsra)
+DO_TYPEA_CFG(bsrl, use_barrel, false, gen_bsrl)
+DO_TYPEA_CFG(bsll, use_barrel, false, gen_bsll)
+
+DO_TYPEBI_CFG(bsrai, use_barrel, false, tcg_gen_sari_i32)
+DO_TYPEBI_CFG(bsrli, use_barrel, false, tcg_gen_shri_i32)
+DO_TYPEBI_CFG(bslli, use_barrel, false, tcg_gen_shli_i32)
+
+DO_TYPEBI_CFG(bsefi, use_barrel, false, gen_bsefi)
+DO_TYPEBI_CFG(bsifi, use_barrel, false, gen_bsifi)
+
+static void gen_clz(TCGv_i32 out, TCGv_i32 ina)
+{
+ tcg_gen_clzi_i32(out, ina, 32);
+}
+
+DO_TYPEA0_CFG(clz, use_pcmp_instr, false, gen_clz)
+
static void gen_cmp(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
TCGv_i32 lt = tcg_temp_new_i32();
DO_TYPEA(cmp, false, gen_cmp)
DO_TYPEA(cmpu, false, gen_cmpu)
+ENV_WRAPPER3(gen_fadd, gen_helper_fadd)
+ENV_WRAPPER3(gen_frsub, gen_helper_frsub)
+ENV_WRAPPER3(gen_fmul, gen_helper_fmul)
+ENV_WRAPPER3(gen_fdiv, gen_helper_fdiv)
+ENV_WRAPPER3(gen_fcmp_un, gen_helper_fcmp_un)
+ENV_WRAPPER3(gen_fcmp_lt, gen_helper_fcmp_lt)
+ENV_WRAPPER3(gen_fcmp_eq, gen_helper_fcmp_eq)
+ENV_WRAPPER3(gen_fcmp_le, gen_helper_fcmp_le)
+ENV_WRAPPER3(gen_fcmp_gt, gen_helper_fcmp_gt)
+ENV_WRAPPER3(gen_fcmp_ne, gen_helper_fcmp_ne)
+ENV_WRAPPER3(gen_fcmp_ge, gen_helper_fcmp_ge)
+
+DO_TYPEA_CFG(fadd, use_fpu, true, gen_fadd)
+DO_TYPEA_CFG(frsub, use_fpu, true, gen_frsub)
+DO_TYPEA_CFG(fmul, use_fpu, true, gen_fmul)
+DO_TYPEA_CFG(fdiv, use_fpu, true, gen_fdiv)
+DO_TYPEA_CFG(fcmp_un, use_fpu, true, gen_fcmp_un)
+DO_TYPEA_CFG(fcmp_lt, use_fpu, true, gen_fcmp_lt)
+DO_TYPEA_CFG(fcmp_eq, use_fpu, true, gen_fcmp_eq)
+DO_TYPEA_CFG(fcmp_le, use_fpu, true, gen_fcmp_le)
+DO_TYPEA_CFG(fcmp_gt, use_fpu, true, gen_fcmp_gt)
+DO_TYPEA_CFG(fcmp_ne, use_fpu, true, gen_fcmp_ne)
+DO_TYPEA_CFG(fcmp_ge, use_fpu, true, gen_fcmp_ge)
+
+ENV_WRAPPER2(gen_flt, gen_helper_flt)
+ENV_WRAPPER2(gen_fint, gen_helper_fint)
+ENV_WRAPPER2(gen_fsqrt, gen_helper_fsqrt)
+
+DO_TYPEA0_CFG(flt, use_fpu >= 2, true, gen_flt)
+DO_TYPEA0_CFG(fint, use_fpu >= 2, true, gen_fint)
+DO_TYPEA0_CFG(fsqrt, use_fpu >= 2, true, gen_fsqrt)
+
+/* Does not use ENV_WRAPPER3, because arguments are swapped as well. */
+static void gen_idiv(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
+{
+ gen_helper_divs(out, cpu_env, inb, ina);
+}
+
+static void gen_idivu(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
+{
+ gen_helper_divu(out, cpu_env, inb, ina);
+}
+
+DO_TYPEA_CFG(idiv, use_div, true, gen_idiv)
+DO_TYPEA_CFG(idivu, use_div, true, gen_idivu)
+
+static bool trans_imm(DisasContext *dc, arg_imm *arg)
+{
+ if (invalid_delay_slot(dc, "imm")) {
+ return true;
+ }
+ dc->ext_imm = arg->imm << 16;
+ tcg_gen_movi_i32(cpu_imm, dc->ext_imm);
+ dc->tb_flags_to_set = IMM_FLAG;
+ return true;
+}
+
+static void gen_mulh(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
+{
+ TCGv_i32 tmp = tcg_temp_new_i32();
+ tcg_gen_muls2_i32(tmp, out, ina, inb);
+ tcg_temp_free_i32(tmp);
+}
+
+static void gen_mulhu(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
+{
+ TCGv_i32 tmp = tcg_temp_new_i32();
+ tcg_gen_mulu2_i32(tmp, out, ina, inb);
+ tcg_temp_free_i32(tmp);
+}
+
+static void gen_mulhsu(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
+{
+ TCGv_i32 tmp = tcg_temp_new_i32();
+ tcg_gen_mulsu2_i32(tmp, out, ina, inb);
+ tcg_temp_free_i32(tmp);
+}
+
+DO_TYPEA_CFG(mul, use_hw_mul, false, tcg_gen_mul_i32)
+DO_TYPEA_CFG(mulh, use_hw_mul >= 2, false, gen_mulh)
+DO_TYPEA_CFG(mulhu, use_hw_mul >= 2, false, gen_mulhu)
+DO_TYPEA_CFG(mulhsu, use_hw_mul >= 2, false, gen_mulhsu)
+DO_TYPEBI_CFG(muli, use_hw_mul, false, tcg_gen_muli_i32)
+
DO_TYPEA(or, false, tcg_gen_or_i32)
DO_TYPEBI(ori, false, tcg_gen_ori_i32)
DO_TYPEBV(rsubik, false, gen_rsubk)
DO_TYPEBV(rsubikc, true, gen_rsubkc)
-DO_TYPEA(xor, false, tcg_gen_xor_i32)
-DO_TYPEBI(xori, false, tcg_gen_xori_i32)
+DO_TYPEA0(sext8, false, tcg_gen_ext8s_i32)
+DO_TYPEA0(sext16, false, tcg_gen_ext16s_i32)
-static bool trans_zero(DisasContext *dc, arg_zero *arg)
+static void gen_sra(TCGv_i32 out, TCGv_i32 ina)
{
- /* If opcode_0_illegal, trap. */
- if (dc->cpu->cfg.opcode_0_illegal) {
- trap_illegal(dc, true);
- return true;
- }
- /*
- * Otherwise, this is "add r0, r0, r0".
- * Continue to trans_add so that MSR[C] gets cleared.
- */
- return false;
+ tcg_gen_andi_i32(cpu_msr_c, ina, 1);
+ tcg_gen_sari_i32(out, ina, 1);
}
-static void msr_read(DisasContext *dc, TCGv_i32 d)
+static void gen_src(TCGv_i32 out, TCGv_i32 ina)
{
- TCGv_i32 t;
+ TCGv_i32 tmp = tcg_temp_new_i32();
- /* Replicate the cpu_msr_c boolean into the proper bit and the copy. */
- t = tcg_temp_new_i32();
- tcg_gen_muli_i32(t, cpu_msr_c, MSR_C | MSR_CC);
- tcg_gen_or_i32(d, cpu_msr, t);
- tcg_temp_free_i32(t);
+ tcg_gen_mov_i32(tmp, cpu_msr_c);
+ tcg_gen_andi_i32(cpu_msr_c, ina, 1);
+ tcg_gen_extract2_i32(out, ina, tmp, 1);
+
+ tcg_temp_free_i32(tmp);
}
-static void msr_write(DisasContext *dc, TCGv_i32 v)
+static void gen_srl(TCGv_i32 out, TCGv_i32 ina)
{
- dc->cpustate_changed = 1;
+ tcg_gen_andi_i32(cpu_msr_c, ina, 1);
+ tcg_gen_shri_i32(out, ina, 1);
+}
- /* Install MSR_C. */
- tcg_gen_extract_i32(cpu_msr_c, v, 2, 1);
+DO_TYPEA0(sra, false, gen_sra)
+DO_TYPEA0(src, false, gen_src)
+DO_TYPEA0(srl, false, gen_srl)
- /* Clear MSR_C and MSR_CC; MSR_PVR is not writable, and is always clear. */
- tcg_gen_andi_i32(cpu_msr, v, ~(MSR_C | MSR_CC | MSR_PVR));
+static void gen_swaph(TCGv_i32 out, TCGv_i32 ina)
+{
+ tcg_gen_rotri_i32(out, ina, 16);
}
-static void dec_msr(DisasContext *dc)
+DO_TYPEA0(swapb, false, tcg_gen_bswap32_i32)
+DO_TYPEA0(swaph, false, gen_swaph)
+
+static bool trans_wdic(DisasContext *dc, arg_wdic *a)
{
- CPUState *cs = CPU(dc->cpu);
- TCGv_i32 t0, t1;
- unsigned int sr, rn;
- bool to, clrset, extended = false;
+ /* Cache operations are nops: only check for supervisor mode. */
+ trap_userspace(dc, true);
+ return true;
+}
- sr = extract32(dc->imm, 0, 14);
- to = extract32(dc->imm, 14, 1);
- clrset = extract32(dc->imm, 15, 1) == 0;
- dc->type_b = 1;
- if (to) {
- dc->cpustate_changed = 1;
- }
+DO_TYPEA(xor, false, tcg_gen_xor_i32)
+DO_TYPEBI(xori, false, tcg_gen_xori_i32)
- /* Extended MSRs are only available if addr_size > 32. */
- if (dc->cpu->cfg.addr_size > 32) {
- /* The E-bit is encoded differently for To/From MSR. */
- static const unsigned int e_bit[] = { 19, 24 };
+static TCGv compute_ldst_addr_typea(DisasContext *dc, int ra, int rb)
+{
+ TCGv ret = tcg_temp_new();
- extended = extract32(dc->imm, e_bit[to], 1);
+ /* If any of the regs is r0, set t to the value of the other reg. */
+ if (ra && rb) {
+ TCGv_i32 tmp = tcg_temp_new_i32();
+ tcg_gen_add_i32(tmp, cpu_R[ra], cpu_R[rb]);
+ tcg_gen_extu_i32_tl(ret, tmp);
+ tcg_temp_free_i32(tmp);
+ } else if (ra) {
+ tcg_gen_extu_i32_tl(ret, cpu_R[ra]);
+ } else if (rb) {
+ tcg_gen_extu_i32_tl(ret, cpu_R[rb]);
+ } else {
+ tcg_gen_movi_tl(ret, 0);
}
- /* msrclr and msrset. */
- if (clrset) {
- bool clr = extract32(dc->ir, 16, 1);
-
- if (!dc->cpu->cfg.use_msr_instr) {
- /* nop??? */
- return;
- }
+ if ((ra == 1 || rb == 1) && dc->cfg->stackprot) {
+ gen_helper_stackprot(cpu_env, ret);
+ }
+ return ret;
+}
- if (trap_userspace(dc, dc->imm != 4 && dc->imm != 0)) {
- return;
- }
+static TCGv compute_ldst_addr_typeb(DisasContext *dc, int ra, int imm)
+{
+ TCGv ret = tcg_temp_new();
- if (dc->rd)
- msr_read(dc, cpu_R[dc->rd]);
-
- t0 = tcg_temp_new_i32();
- t1 = tcg_temp_new_i32();
- msr_read(dc, t0);
- tcg_gen_mov_i32(t1, *(dec_alu_op_b(dc)));
-
- if (clr) {
- tcg_gen_not_i32(t1, t1);
- tcg_gen_and_i32(t0, t0, t1);
- } else
- tcg_gen_or_i32(t0, t0, t1);
- msr_write(dc, t0);
- tcg_temp_free_i32(t0);
- tcg_temp_free_i32(t1);
- tcg_gen_movi_i32(cpu_pc, dc->base.pc_next + 4);
- dc->base.is_jmp = DISAS_UPDATE;
- return;
+ /* If any of the regs is r0, set t to the value of the other reg. */
+ if (ra) {
+ TCGv_i32 tmp = tcg_temp_new_i32();
+ tcg_gen_addi_i32(tmp, cpu_R[ra], imm);
+ tcg_gen_extu_i32_tl(ret, tmp);
+ tcg_temp_free_i32(tmp);
+ } else {
+ tcg_gen_movi_tl(ret, (uint32_t)imm);
}
- if (trap_userspace(dc, to)) {
- return;
+ if (ra == 1 && dc->cfg->stackprot) {
+ gen_helper_stackprot(cpu_env, ret);
}
+ return ret;
+}
-#if !defined(CONFIG_USER_ONLY)
- /* Catch read/writes to the mmu block. */
- if ((sr & ~0xff) == 0x1000) {
- TCGv_i32 tmp_ext = tcg_const_i32(extended);
- TCGv_i32 tmp_sr;
+#ifndef CONFIG_USER_ONLY
+static TCGv compute_ldst_addr_ea(DisasContext *dc, int ra, int rb)
+{
+ int addr_size = dc->cfg->addr_size;
+ TCGv ret = tcg_temp_new();
- sr &= 7;
- tmp_sr = tcg_const_i32(sr);
- if (to) {
- gen_helper_mmu_write(cpu_env, tmp_ext, tmp_sr, cpu_R[dc->ra]);
+ if (addr_size == 32 || ra == 0) {
+ if (rb) {
+ tcg_gen_extu_i32_tl(ret, cpu_R[rb]);
} else {
- gen_helper_mmu_read(cpu_R[dc->rd], cpu_env, tmp_ext, tmp_sr);
- }
- tcg_temp_free_i32(tmp_sr);
- tcg_temp_free_i32(tmp_ext);
- return;
- }
-#endif
-
- if (to) {
- switch (sr) {
- case SR_PC:
- break;
- case SR_MSR:
- msr_write(dc, cpu_R[dc->ra]);
- break;
- case SR_EAR:
- {
- TCGv_i64 t64 = tcg_temp_new_i64();
- tcg_gen_extu_i32_i64(t64, cpu_R[dc->ra]);
- tcg_gen_st_i64(t64, cpu_env, offsetof(CPUMBState, ear));
- tcg_temp_free_i64(t64);
- }
- break;
- case SR_ESR:
- tcg_gen_st_i32(cpu_R[dc->ra],
- cpu_env, offsetof(CPUMBState, esr));
- break;
- case SR_FSR:
- tcg_gen_st_i32(cpu_R[dc->ra],
- cpu_env, offsetof(CPUMBState, fsr));
- break;
- case SR_BTR:
- tcg_gen_st_i32(cpu_R[dc->ra],
- cpu_env, offsetof(CPUMBState, btr));
- break;
- case SR_EDR:
- tcg_gen_st_i32(cpu_R[dc->ra],
- cpu_env, offsetof(CPUMBState, edr));
- break;
- case 0x800:
- tcg_gen_st_i32(cpu_R[dc->ra],
- cpu_env, offsetof(CPUMBState, slr));
- break;
- case 0x802:
- tcg_gen_st_i32(cpu_R[dc->ra],
- cpu_env, offsetof(CPUMBState, shr));
- break;
- default:
- cpu_abort(CPU(dc->cpu), "unknown mts reg %x\n", sr);
- break;
+ tcg_gen_movi_tl(ret, 0);
}
} else {
- switch (sr) {
- case SR_PC:
- tcg_gen_movi_i32(cpu_R[dc->rd], dc->base.pc_next);
- break;
- case SR_MSR:
- msr_read(dc, cpu_R[dc->rd]);
- break;
- case SR_EAR:
- {
- TCGv_i64 t64 = tcg_temp_new_i64();
- tcg_gen_ld_i64(t64, cpu_env, offsetof(CPUMBState, ear));
- if (extended) {
- tcg_gen_extrh_i64_i32(cpu_R[dc->rd], t64);
- } else {
- tcg_gen_extrl_i64_i32(cpu_R[dc->rd], t64);
- }
- tcg_temp_free_i64(t64);
- }
- break;
- case SR_ESR:
- tcg_gen_ld_i32(cpu_R[dc->rd],
- cpu_env, offsetof(CPUMBState, esr));
- break;
- case SR_FSR:
- tcg_gen_ld_i32(cpu_R[dc->rd],
- cpu_env, offsetof(CPUMBState, fsr));
- break;
- case SR_BTR:
- tcg_gen_ld_i32(cpu_R[dc->rd],
- cpu_env, offsetof(CPUMBState, btr));
- break;
- case SR_EDR:
- tcg_gen_ld_i32(cpu_R[dc->rd],
- cpu_env, offsetof(CPUMBState, edr));
- break;
- case 0x800:
- tcg_gen_ld_i32(cpu_R[dc->rd],
- cpu_env, offsetof(CPUMBState, slr));
- break;
- case 0x802:
- tcg_gen_ld_i32(cpu_R[dc->rd],
- cpu_env, offsetof(CPUMBState, shr));
- break;
- case 0x2000 ... 0x200c:
- rn = sr & 0xf;
- tcg_gen_ld_i32(cpu_R[dc->rd],
- cpu_env, offsetof(CPUMBState, pvr.regs[rn]));
- break;
- default:
- cpu_abort(cs, "unknown mfs reg %x\n", sr);
- break;
+ if (rb) {
+ tcg_gen_concat_i32_i64(ret, cpu_R[rb], cpu_R[ra]);
+ } else {
+ tcg_gen_extu_i32_tl(ret, cpu_R[ra]);
+ tcg_gen_shli_tl(ret, ret, 32);
+ }
+ if (addr_size < 64) {
+ /* Mask off out of range bits. */
+ tcg_gen_andi_i64(ret, ret, MAKE_64BIT_MASK(0, addr_size));
}
}
-
- if (dc->rd == 0) {
- tcg_gen_movi_i32(cpu_R[0], 0);
- }
+ return ret;
}
+#endif
-/* Multiplier unit. */
-static void dec_mul(DisasContext *dc)
+#ifndef CONFIG_USER_ONLY
+static void record_unaligned_ess(DisasContext *dc, int rd,
+ MemOp size, bool store)
{
- TCGv_i32 tmp;
- unsigned int subcode;
+ uint32_t iflags = tcg_get_insn_start_param(dc->insn_start, 1);
- if (trap_illegal(dc, !dc->cpu->cfg.use_hw_mul)) {
- return;
- }
+ iflags |= ESR_ESS_FLAG;
+ iflags |= rd << 5;
+ iflags |= store * ESR_S;
+ iflags |= (size == MO_32) * ESR_W;
- subcode = dc->imm & 3;
+ tcg_set_insn_start_param(dc->insn_start, 1, iflags);
+}
+#endif
- if (dc->type_b) {
- tcg_gen_mul_i32(cpu_R[dc->rd], cpu_R[dc->ra], *(dec_alu_op_b(dc)));
- return;
- }
+static bool do_load(DisasContext *dc, int rd, TCGv addr, MemOp mop,
+ int mem_index, bool rev)
+{
+ MemOp size = mop & MO_SIZE;
- /* mulh, mulhsu and mulhu are not available if C_USE_HW_MUL is < 2. */
- if (subcode >= 1 && subcode <= 3 && dc->cpu->cfg.use_hw_mul < 2) {
- /* nop??? */
+ /*
+ * When doing reverse accesses we need to do two things.
+ *
+ * 1. Reverse the address wrt endianness.
+ * 2. Byteswap the data lanes on the way back into the CPU core.
+ */
+ if (rev) {
+ if (size > MO_8) {
+ mop ^= MO_BSWAP;
+ }
+ if (size < MO_32) {
+ tcg_gen_xori_tl(addr, addr, 3 - size);
+ }
}
- tmp = tcg_temp_new_i32();
- switch (subcode) {
- case 0:
- tcg_gen_mul_i32(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
- break;
- case 1:
- tcg_gen_muls2_i32(tmp, cpu_R[dc->rd],
- cpu_R[dc->ra], cpu_R[dc->rb]);
- break;
- case 2:
- tcg_gen_mulsu2_i32(tmp, cpu_R[dc->rd],
- cpu_R[dc->ra], cpu_R[dc->rb]);
- break;
- case 3:
- tcg_gen_mulu2_i32(tmp, cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]);
- break;
- default:
- cpu_abort(CPU(dc->cpu), "unknown MUL insn %x\n", subcode);
- break;
+ /*
+ * For system mode, enforce alignment if the cpu configuration
+ * requires it. For user-mode, the Linux kernel will have fixed up
+ * any unaligned access, so emulate that by *not* setting MO_ALIGN.
+ */
+#ifndef CONFIG_USER_ONLY
+ if (size > MO_8 &&
+ (dc->tb_flags & MSR_EE) &&
+ dc->cfg->unaligned_exceptions) {
+ record_unaligned_ess(dc, rd, size, false);
+ mop |= MO_ALIGN;
}
- tcg_temp_free_i32(tmp);
+#endif
+
+ tcg_gen_qemu_ld_i32(reg_for_write(dc, rd), addr, mem_index, mop);
+
+ tcg_temp_free(addr);
+ return true;
}
-/* Div unit. */
-static void dec_div(DisasContext *dc)
+static bool trans_lbu(DisasContext *dc, arg_typea *arg)
{
- unsigned int u;
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_load(dc, arg->rd, addr, MO_UB, dc->mem_index, false);
+}
- u = dc->imm & 2;
+static bool trans_lbur(DisasContext *dc, arg_typea *arg)
+{
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_load(dc, arg->rd, addr, MO_UB, dc->mem_index, true);
+}
- if (trap_illegal(dc, !dc->cpu->cfg.use_div)) {
- return;
+static bool trans_lbuea(DisasContext *dc, arg_typea *arg)
+{
+ if (trap_userspace(dc, true)) {
+ return true;
}
+#ifdef CONFIG_USER_ONLY
+ return true;
+#else
+ TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
+ return do_load(dc, arg->rd, addr, MO_UB, MMU_NOMMU_IDX, false);
+#endif
+}
- if (u)
- gen_helper_divu(cpu_R[dc->rd], cpu_env, *(dec_alu_op_b(dc)),
- cpu_R[dc->ra]);
- else
- gen_helper_divs(cpu_R[dc->rd], cpu_env, *(dec_alu_op_b(dc)),
- cpu_R[dc->ra]);
- if (!dc->rd)
- tcg_gen_movi_i32(cpu_R[dc->rd], 0);
+static bool trans_lbui(DisasContext *dc, arg_typeb *arg)
+{
+ TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
+ return do_load(dc, arg->rd, addr, MO_UB, dc->mem_index, false);
}
-static void dec_barrel(DisasContext *dc)
+static bool trans_lhu(DisasContext *dc, arg_typea *arg)
{
- TCGv_i32 t0;
- unsigned int imm_w, imm_s;
- bool s, t, e = false, i = false;
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_load(dc, arg->rd, addr, MO_TEUW, dc->mem_index, false);
+}
- if (trap_illegal(dc, !dc->cpu->cfg.use_barrel)) {
- return;
- }
+static bool trans_lhur(DisasContext *dc, arg_typea *arg)
+{
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_load(dc, arg->rd, addr, MO_TEUW, dc->mem_index, true);
+}
- if (dc->type_b) {
- /* Insert and extract are only available in immediate mode. */
- i = extract32(dc->imm, 15, 1);
- e = extract32(dc->imm, 14, 1);
+static bool trans_lhuea(DisasContext *dc, arg_typea *arg)
+{
+ if (trap_userspace(dc, true)) {
+ return true;
}
- s = extract32(dc->imm, 10, 1);
- t = extract32(dc->imm, 9, 1);
- imm_w = extract32(dc->imm, 6, 5);
- imm_s = extract32(dc->imm, 0, 5);
+#ifdef CONFIG_USER_ONLY
+ return true;
+#else
+ TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
+ return do_load(dc, arg->rd, addr, MO_TEUW, MMU_NOMMU_IDX, false);
+#endif
+}
- if (e) {
- if (imm_w + imm_s > 32 || imm_w == 0) {
- /* These inputs have an undefined behavior. */
- qemu_log_mask(LOG_GUEST_ERROR, "bsefi: Bad input w=%d s=%d\n",
- imm_w, imm_s);
- } else {
- tcg_gen_extract_i32(cpu_R[dc->rd], cpu_R[dc->ra], imm_s, imm_w);
- }
- } else if (i) {
- int width = imm_w - imm_s + 1;
+static bool trans_lhui(DisasContext *dc, arg_typeb *arg)
+{
+ TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
+ return do_load(dc, arg->rd, addr, MO_TEUW, dc->mem_index, false);
+}
- if (imm_w < imm_s) {
- /* These inputs have an undefined behavior. */
- qemu_log_mask(LOG_GUEST_ERROR, "bsifi: Bad input w=%d s=%d\n",
- imm_w, imm_s);
- } else {
- tcg_gen_deposit_i32(cpu_R[dc->rd], cpu_R[dc->rd], cpu_R[dc->ra],
- imm_s, width);
- }
- } else {
- t0 = tcg_temp_new_i32();
+static bool trans_lw(DisasContext *dc, arg_typea *arg)
+{
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_load(dc, arg->rd, addr, MO_TEUL, dc->mem_index, false);
+}
- tcg_gen_mov_i32(t0, *(dec_alu_op_b(dc)));
- tcg_gen_andi_i32(t0, t0, 31);
+static bool trans_lwr(DisasContext *dc, arg_typea *arg)
+{
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_load(dc, arg->rd, addr, MO_TEUL, dc->mem_index, true);
+}
- if (s) {
- tcg_gen_shl_i32(cpu_R[dc->rd], cpu_R[dc->ra], t0);
- } else {
- if (t) {
- tcg_gen_sar_i32(cpu_R[dc->rd], cpu_R[dc->ra], t0);
- } else {
- tcg_gen_shr_i32(cpu_R[dc->rd], cpu_R[dc->ra], t0);
- }
- }
- tcg_temp_free_i32(t0);
+static bool trans_lwea(DisasContext *dc, arg_typea *arg)
+{
+ if (trap_userspace(dc, true)) {
+ return true;
}
+#ifdef CONFIG_USER_ONLY
+ return true;
+#else
+ TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
+ return do_load(dc, arg->rd, addr, MO_TEUL, MMU_NOMMU_IDX, false);
+#endif
}
-static void dec_bit(DisasContext *dc)
+static bool trans_lwi(DisasContext *dc, arg_typeb *arg)
{
- CPUState *cs = CPU(dc->cpu);
- TCGv_i32 t0;
- unsigned int op;
+ TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
+ return do_load(dc, arg->rd, addr, MO_TEUL, dc->mem_index, false);
+}
- op = dc->ir & ((1 << 9) - 1);
- switch (op) {
- case 0x21:
- /* src. */
- t0 = tcg_temp_new_i32();
+static bool trans_lwx(DisasContext *dc, arg_typea *arg)
+{
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
- tcg_gen_shli_i32(t0, cpu_msr_c, 31);
- tcg_gen_andi_i32(cpu_msr_c, cpu_R[dc->ra], 1);
- if (dc->rd) {
- tcg_gen_shri_i32(cpu_R[dc->rd], cpu_R[dc->ra], 1);
- tcg_gen_or_i32(cpu_R[dc->rd], cpu_R[dc->rd], t0);
- }
- tcg_temp_free_i32(t0);
- break;
+ /* lwx does not throw unaligned access errors, so force alignment */
+ tcg_gen_andi_tl(addr, addr, ~3);
- case 0x1:
- case 0x41:
- /* srl. */
- tcg_gen_andi_i32(cpu_msr_c, cpu_R[dc->ra], 1);
- if (dc->rd) {
- if (op == 0x41)
- tcg_gen_shri_i32(cpu_R[dc->rd], cpu_R[dc->ra], 1);
- else
- tcg_gen_sari_i32(cpu_R[dc->rd], cpu_R[dc->ra], 1);
- }
- break;
- case 0x60:
- tcg_gen_ext8s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
- break;
- case 0x61:
- tcg_gen_ext16s_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
- break;
- case 0x64:
- case 0x66:
- case 0x74:
- case 0x76:
- /* wdc. */
- trap_userspace(dc, true);
- break;
- case 0x68:
- /* wic. */
- trap_userspace(dc, true);
- break;
- case 0xe0:
- if (trap_illegal(dc, !dc->cpu->cfg.use_pcmp_instr)) {
- return;
- }
- if (dc->cpu->cfg.use_pcmp_instr) {
- tcg_gen_clzi_i32(cpu_R[dc->rd], cpu_R[dc->ra], 32);
- }
- break;
- case 0x1e0:
- /* swapb */
- tcg_gen_bswap32_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
- break;
- case 0x1e2:
- /*swaph */
- tcg_gen_rotri_i32(cpu_R[dc->rd], cpu_R[dc->ra], 16);
- break;
- default:
- cpu_abort(cs, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n",
- (uint32_t)dc->base.pc_next, op, dc->rd, dc->ra, dc->rb);
- break;
+ tcg_gen_qemu_ld_i32(cpu_res_val, addr, dc->mem_index, MO_TEUL);
+ tcg_gen_mov_tl(cpu_res_addr, addr);
+ tcg_temp_free(addr);
+
+ if (arg->rd) {
+ tcg_gen_mov_i32(cpu_R[arg->rd], cpu_res_val);
}
+
+ /* No support for AXI exclusive so always clear C */
+ tcg_gen_movi_i32(cpu_msr_c, 0);
+ return true;
}
-static inline void sync_jmpstate(DisasContext *dc)
+static bool do_store(DisasContext *dc, int rd, TCGv addr, MemOp mop,
+ int mem_index, bool rev)
{
- if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
- if (dc->jmp == JMP_DIRECT) {
- tcg_gen_movi_i32(cpu_btaken, 1);
+ MemOp size = mop & MO_SIZE;
+
+ /*
+ * When doing reverse accesses we need to do two things.
+ *
+ * 1. Reverse the address wrt endianness.
+ * 2. Byteswap the data lanes on the way back into the CPU core.
+ */
+ if (rev) {
+ if (size > MO_8) {
+ mop ^= MO_BSWAP;
+ }
+ if (size < MO_32) {
+ tcg_gen_xori_tl(addr, addr, 3 - size);
}
- dc->jmp = JMP_INDIRECT;
- tcg_gen_movi_i32(cpu_btarget, dc->jmp_pc);
}
+
+ /*
+ * For system mode, enforce alignment if the cpu configuration
+ * requires it. For user-mode, the Linux kernel will have fixed up
+ * any unaligned access, so emulate that by *not* setting MO_ALIGN.
+ */
+#ifndef CONFIG_USER_ONLY
+ if (size > MO_8 &&
+ (dc->tb_flags & MSR_EE) &&
+ dc->cfg->unaligned_exceptions) {
+ record_unaligned_ess(dc, rd, size, true);
+ mop |= MO_ALIGN;
+ }
+#endif
+
+ tcg_gen_qemu_st_i32(reg_for_read(dc, rd), addr, mem_index, mop);
+
+ tcg_temp_free(addr);
+ return true;
}
-static void dec_imm(DisasContext *dc)
+static bool trans_sb(DisasContext *dc, arg_typea *arg)
{
- dc->ext_imm = dc->imm << 16;
- tcg_gen_movi_i32(cpu_imm, dc->ext_imm);
- dc->tb_flags |= IMM_FLAG;
- dc->clear_imm = 0;
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_store(dc, arg->rd, addr, MO_UB, dc->mem_index, false);
}
-static inline void compute_ldst_addr(DisasContext *dc, bool ea, TCGv t)
+static bool trans_sbr(DisasContext *dc, arg_typea *arg)
{
- /* Should be set to true if r1 is used by loadstores. */
- bool stackprot = false;
- TCGv_i32 t32;
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_store(dc, arg->rd, addr, MO_UB, dc->mem_index, true);
+}
- /* All load/stores use ra. */
- if (dc->ra == 1 && dc->cpu->cfg.stackprot) {
- stackprot = true;
+static bool trans_sbea(DisasContext *dc, arg_typea *arg)
+{
+ if (trap_userspace(dc, true)) {
+ return true;
}
+#ifdef CONFIG_USER_ONLY
+ return true;
+#else
+ TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
+ return do_store(dc, arg->rd, addr, MO_UB, MMU_NOMMU_IDX, false);
+#endif
+}
- /* Treat the common cases first. */
- if (!dc->type_b) {
- if (ea) {
- int addr_size = dc->cpu->cfg.addr_size;
+static bool trans_sbi(DisasContext *dc, arg_typeb *arg)
+{
+ TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
+ return do_store(dc, arg->rd, addr, MO_UB, dc->mem_index, false);
+}
- if (addr_size == 32) {
- tcg_gen_extu_i32_tl(t, cpu_R[dc->rb]);
- return;
- }
+static bool trans_sh(DisasContext *dc, arg_typea *arg)
+{
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_store(dc, arg->rd, addr, MO_TEUW, dc->mem_index, false);
+}
- tcg_gen_concat_i32_i64(t, cpu_R[dc->rb], cpu_R[dc->ra]);
- if (addr_size < 64) {
- /* Mask off out of range bits. */
- tcg_gen_andi_i64(t, t, MAKE_64BIT_MASK(0, addr_size));
- }
- return;
- }
+static bool trans_shr(DisasContext *dc, arg_typea *arg)
+{
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_store(dc, arg->rd, addr, MO_TEUW, dc->mem_index, true);
+}
- /* If any of the regs is r0, set t to the value of the other reg. */
- if (dc->ra == 0) {
- tcg_gen_extu_i32_tl(t, cpu_R[dc->rb]);
- return;
- } else if (dc->rb == 0) {
- tcg_gen_extu_i32_tl(t, cpu_R[dc->ra]);
- return;
- }
+static bool trans_shea(DisasContext *dc, arg_typea *arg)
+{
+ if (trap_userspace(dc, true)) {
+ return true;
+ }
+#ifdef CONFIG_USER_ONLY
+ return true;
+#else
+ TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
+ return do_store(dc, arg->rd, addr, MO_TEUW, MMU_NOMMU_IDX, false);
+#endif
+}
- if (dc->rb == 1 && dc->cpu->cfg.stackprot) {
- stackprot = true;
- }
+static bool trans_shi(DisasContext *dc, arg_typeb *arg)
+{
+ TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
+ return do_store(dc, arg->rd, addr, MO_TEUW, dc->mem_index, false);
+}
- t32 = tcg_temp_new_i32();
- tcg_gen_add_i32(t32, cpu_R[dc->ra], cpu_R[dc->rb]);
- tcg_gen_extu_i32_tl(t, t32);
- tcg_temp_free_i32(t32);
+static bool trans_sw(DisasContext *dc, arg_typea *arg)
+{
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_store(dc, arg->rd, addr, MO_TEUL, dc->mem_index, false);
+}
- if (stackprot) {
- gen_helper_stackprot(cpu_env, t);
- }
- return;
- }
- /* Immediate. */
- t32 = tcg_temp_new_i32();
- tcg_gen_addi_i32(t32, cpu_R[dc->ra], dec_alu_typeb_imm(dc));
- tcg_gen_extu_i32_tl(t, t32);
- tcg_temp_free_i32(t32);
+static bool trans_swr(DisasContext *dc, arg_typea *arg)
+{
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ return do_store(dc, arg->rd, addr, MO_TEUL, dc->mem_index, true);
+}
- if (stackprot) {
- gen_helper_stackprot(cpu_env, t);
+static bool trans_swea(DisasContext *dc, arg_typea *arg)
+{
+ if (trap_userspace(dc, true)) {
+ return true;
}
- return;
+#ifdef CONFIG_USER_ONLY
+ return true;
+#else
+ TCGv addr = compute_ldst_addr_ea(dc, arg->ra, arg->rb);
+ return do_store(dc, arg->rd, addr, MO_TEUL, MMU_NOMMU_IDX, false);
+#endif
}
-static void dec_load(DisasContext *dc)
+static bool trans_swi(DisasContext *dc, arg_typeb *arg)
{
- TCGv_i32 v;
- TCGv addr;
- unsigned int size;
- bool rev = false, ex = false, ea = false;
- int mem_index = cpu_mmu_index(&dc->cpu->env, false);
- MemOp mop;
-
- mop = dc->opcode & 3;
- size = 1 << mop;
- if (!dc->type_b) {
- ea = extract32(dc->ir, 7, 1);
- rev = extract32(dc->ir, 9, 1);
- ex = extract32(dc->ir, 10, 1);
- }
- mop |= MO_TE;
- if (rev) {
- mop ^= MO_BSWAP;
- }
+ TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
+ return do_store(dc, arg->rd, addr, MO_TEUL, dc->mem_index, false);
+}
- if (trap_illegal(dc, size > 4)) {
- return;
- }
+static bool trans_swx(DisasContext *dc, arg_typea *arg)
+{
+ TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
+ TCGLabel *swx_done = gen_new_label();
+ TCGLabel *swx_fail = gen_new_label();
+ TCGv_i32 tval;
- if (trap_userspace(dc, ea)) {
- return;
- }
+ /* swx does not throw unaligned access errors, so force alignment */
+ tcg_gen_andi_tl(addr, addr, ~3);
- t_sync_flags(dc);
- addr = tcg_temp_new();
- compute_ldst_addr(dc, ea, addr);
- /* Extended addressing bypasses the MMU. */
- mem_index = ea ? MMU_NOMMU_IDX : mem_index;
+ /*
+ * Compare the address vs the one we used during lwx.
+ * On mismatch, the operation fails. On match, addr dies at the
+ * branch, but we know we can use the equal version in the global.
+ * In either case, addr is no longer needed.
+ */
+ tcg_gen_brcond_tl(TCG_COND_NE, cpu_res_addr, addr, swx_fail);
+ tcg_temp_free(addr);
/*
- * When doing reverse accesses we need to do two things.
- *
- * 1. Reverse the address wrt endianness.
- * 2. Byteswap the data lanes on the way back into the CPU core.
+ * Compare the value loaded during lwx with current contents of
+ * the reserved location.
*/
- if (rev && size != 4) {
- /* Endian reverse the address. t is addr. */
- switch (size) {
- case 1:
- {
- tcg_gen_xori_tl(addr, addr, 3);
- break;
- }
+ tval = tcg_temp_new_i32();
- case 2:
- /* 00 -> 10
- 10 -> 00. */
- tcg_gen_xori_tl(addr, addr, 2);
- break;
- default:
- cpu_abort(CPU(dc->cpu), "Invalid reverse size\n");
- break;
- }
- }
+ tcg_gen_atomic_cmpxchg_i32(tval, cpu_res_addr, cpu_res_val,
+ reg_for_write(dc, arg->rd),
+ dc->mem_index, MO_TEUL);
- /* lwx does not throw unaligned access errors, so force alignment */
- if (ex) {
- tcg_gen_andi_tl(addr, addr, ~3);
- }
+ tcg_gen_brcond_i32(TCG_COND_NE, cpu_res_val, tval, swx_fail);
+ tcg_temp_free_i32(tval);
- /* If we get a fault on a dslot, the jmpstate better be in sync. */
- sync_jmpstate(dc);
+ /* Success */
+ tcg_gen_movi_i32(cpu_msr_c, 0);
+ tcg_gen_br(swx_done);
- /* Verify alignment if needed. */
- /*
- * 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.
- */
- v = tcg_temp_new_i32();
- tcg_gen_qemu_ld_i32(v, addr, mem_index, mop);
+ /* Failure */
+ gen_set_label(swx_fail);
+ tcg_gen_movi_i32(cpu_msr_c, 1);
- if (dc->cpu->cfg.unaligned_exceptions && size > 1) {
- TCGv_i32 t0 = tcg_const_i32(0);
- TCGv_i32 treg = tcg_const_i32(dc->rd);
- TCGv_i32 tsize = tcg_const_i32(size - 1);
+ gen_set_label(swx_done);
- tcg_gen_movi_i32(cpu_pc, dc->base.pc_next);
- gen_helper_memalign(cpu_env, addr, treg, t0, tsize);
+ /*
+ * Prevent the saved address from working again without another ldx.
+ * Akin to the pseudocode setting reservation = 0.
+ */
+ tcg_gen_movi_tl(cpu_res_addr, -1);
+ return true;
+}
- tcg_temp_free_i32(t0);
- tcg_temp_free_i32(treg);
- tcg_temp_free_i32(tsize);
+static void setup_dslot(DisasContext *dc, bool type_b)
+{
+ dc->tb_flags_to_set |= D_FLAG;
+ if (type_b && (dc->tb_flags & IMM_FLAG)) {
+ dc->tb_flags_to_set |= BIMM_FLAG;
}
+}
- if (ex) {
- tcg_gen_mov_tl(cpu_res_addr, addr);
- tcg_gen_mov_i32(cpu_res_val, v);
+static bool do_branch(DisasContext *dc, int dest_rb, int dest_imm,
+ bool delay, bool abs, int link)
+{
+ uint32_t add_pc;
+
+ if (invalid_delay_slot(dc, "branch")) {
+ return true;
}
- if (dc->rd) {
- tcg_gen_mov_i32(cpu_R[dc->rd], v);
+ if (delay) {
+ setup_dslot(dc, dest_rb < 0);
}
- tcg_temp_free_i32(v);
- if (ex) { /* lwx */
- /* no support for AXI exclusive so always clear C */
- tcg_gen_movi_i32(cpu_msr_c, 0);
+ if (link) {
+ tcg_gen_movi_i32(cpu_R[link], dc->base.pc_next);
}
- tcg_temp_free(addr);
+ /* Store the branch taken destination into btarget. */
+ add_pc = abs ? 0 : dc->base.pc_next;
+ if (dest_rb > 0) {
+ dc->jmp_dest = -1;
+ tcg_gen_addi_i32(cpu_btarget, cpu_R[dest_rb], add_pc);
+ } else {
+ dc->jmp_dest = add_pc + dest_imm;
+ tcg_gen_movi_i32(cpu_btarget, dc->jmp_dest);
+ }
+ dc->jmp_cond = TCG_COND_ALWAYS;
+ return true;
}
-static void dec_store(DisasContext *dc)
+#define DO_BR(NAME, NAMEI, DELAY, ABS, LINK) \
+ static bool trans_##NAME(DisasContext *dc, arg_typea_br *arg) \
+ { return do_branch(dc, arg->rb, 0, DELAY, ABS, LINK ? arg->rd : 0); } \
+ static bool trans_##NAMEI(DisasContext *dc, arg_typeb_br *arg) \
+ { return do_branch(dc, -1, arg->imm, DELAY, ABS, LINK ? arg->rd : 0); }
+
+DO_BR(br, bri, false, false, false)
+DO_BR(bra, brai, false, true, false)
+DO_BR(brd, brid, true, false, false)
+DO_BR(brad, braid, true, true, false)
+DO_BR(brld, brlid, true, false, true)
+DO_BR(brald, bralid, true, true, true)
+
+static bool do_bcc(DisasContext *dc, int dest_rb, int dest_imm,
+ TCGCond cond, int ra, bool delay)
{
- TCGv addr;
- TCGLabel *swx_skip = NULL;
- unsigned int size;
- bool rev = false, ex = false, ea = false;
- int mem_index = cpu_mmu_index(&dc->cpu->env, false);
- MemOp mop;
+ TCGv_i32 zero, next;
- mop = dc->opcode & 3;
- size = 1 << mop;
- if (!dc->type_b) {
- ea = extract32(dc->ir, 7, 1);
- rev = extract32(dc->ir, 9, 1);
- ex = extract32(dc->ir, 10, 1);
+ if (invalid_delay_slot(dc, "bcc")) {
+ return true;
}
- mop |= MO_TE;
- if (rev) {
- mop ^= MO_BSWAP;
+ if (delay) {
+ setup_dslot(dc, dest_rb < 0);
}
- if (trap_illegal(dc, size > 4)) {
- return;
- }
+ dc->jmp_cond = cond;
- trap_userspace(dc, ea);
+ /* Cache the condition register in cpu_bvalue across any delay slot. */
+ tcg_gen_mov_i32(cpu_bvalue, reg_for_read(dc, ra));
- t_sync_flags(dc);
- /* If we get a fault on a dslot, the jmpstate better be in sync. */
- sync_jmpstate(dc);
- /* SWX needs a temp_local. */
- addr = ex ? tcg_temp_local_new() : tcg_temp_new();
- compute_ldst_addr(dc, ea, addr);
- /* Extended addressing bypasses the MMU. */
- mem_index = ea ? MMU_NOMMU_IDX : mem_index;
+ /* Store the branch taken destination into btarget. */
+ if (dest_rb > 0) {
+ dc->jmp_dest = -1;
+ tcg_gen_addi_i32(cpu_btarget, cpu_R[dest_rb], dc->base.pc_next);
+ } else {
+ dc->jmp_dest = dc->base.pc_next + dest_imm;
+ tcg_gen_movi_i32(cpu_btarget, dc->jmp_dest);
+ }
- if (ex) { /* swx */
- TCGv_i32 tval;
+ /* Compute the final destination into btarget. */
+ zero = tcg_const_i32(0);
+ next = tcg_const_i32(dc->base.pc_next + (delay + 1) * 4);
+ tcg_gen_movcond_i32(dc->jmp_cond, cpu_btarget,
+ reg_for_read(dc, ra), zero,
+ cpu_btarget, next);
+ tcg_temp_free_i32(zero);
+ tcg_temp_free_i32(next);
- /* swx does not throw unaligned access errors, so force alignment */
- tcg_gen_andi_tl(addr, addr, ~3);
+ return true;
+}
- tcg_gen_movi_i32(cpu_msr_c, 1);
- swx_skip = gen_new_label();
- tcg_gen_brcond_tl(TCG_COND_NE, cpu_res_addr, addr, swx_skip);
+#define DO_BCC(NAME, COND) \
+ static bool trans_##NAME(DisasContext *dc, arg_typea_bc *arg) \
+ { return do_bcc(dc, arg->rb, 0, COND, arg->ra, false); } \
+ static bool trans_##NAME##d(DisasContext *dc, arg_typea_bc *arg) \
+ { return do_bcc(dc, arg->rb, 0, COND, arg->ra, true); } \
+ static bool trans_##NAME##i(DisasContext *dc, arg_typeb_bc *arg) \
+ { return do_bcc(dc, -1, arg->imm, COND, arg->ra, false); } \
+ static bool trans_##NAME##id(DisasContext *dc, arg_typeb_bc *arg) \
+ { return do_bcc(dc, -1, arg->imm, COND, arg->ra, true); }
- /*
- * Compare the value loaded at lwx with current contents of
- * the reserved location.
- */
- tval = tcg_temp_new_i32();
-
- tcg_gen_atomic_cmpxchg_i32(tval, addr, cpu_res_val,
- cpu_R[dc->rd], mem_index,
- mop);
+DO_BCC(beq, TCG_COND_EQ)
+DO_BCC(bge, TCG_COND_GE)
+DO_BCC(bgt, TCG_COND_GT)
+DO_BCC(ble, TCG_COND_LE)
+DO_BCC(blt, TCG_COND_LT)
+DO_BCC(bne, TCG_COND_NE)
- tcg_gen_brcond_i32(TCG_COND_NE, cpu_res_val, tval, swx_skip);
- tcg_gen_movi_i32(cpu_msr_c, 0);
- tcg_temp_free_i32(tval);
+static bool trans_brk(DisasContext *dc, arg_typea_br *arg)
+{
+ if (trap_userspace(dc, true)) {
+ return true;
}
-
- if (rev && size != 4) {
- /* Endian reverse the address. t is addr. */
- switch (size) {
- case 1:
- {
- tcg_gen_xori_tl(addr, addr, 3);
- break;
- }
-
- case 2:
- /* 00 -> 10
- 10 -> 00. */
- /* Force addr into the temp. */
- tcg_gen_xori_tl(addr, addr, 2);
- break;
- default:
- cpu_abort(CPU(dc->cpu), "Invalid reverse size\n");
- break;
- }
+ if (invalid_delay_slot(dc, "brk")) {
+ return true;
}
- if (!ex) {
- tcg_gen_qemu_st_i32(cpu_R[dc->rd], addr, mem_index, mop);
+ tcg_gen_mov_i32(cpu_pc, reg_for_read(dc, arg->rb));
+ if (arg->rd) {
+ tcg_gen_movi_i32(cpu_R[arg->rd], dc->base.pc_next);
}
+ tcg_gen_ori_i32(cpu_msr, cpu_msr, MSR_BIP);
+ tcg_gen_movi_tl(cpu_res_addr, -1);
- /* Verify alignment if needed. */
- if (dc->cpu->cfg.unaligned_exceptions && size > 1) {
- TCGv_i32 t1 = tcg_const_i32(1);
- TCGv_i32 treg = tcg_const_i32(dc->rd);
- TCGv_i32 tsize = tcg_const_i32(size - 1);
+ dc->base.is_jmp = DISAS_EXIT;
+ return true;
+}
- tcg_gen_movi_i32(cpu_pc, dc->base.pc_next);
- /* FIXME: if the alignment is wrong, we should restore the value
- * in memory. One possible way to achieve this is to probe
- * the MMU prior to the memaccess, thay way we could put
- * the alignment checks in between the probe and the mem
- * access.
- */
- gen_helper_memalign(cpu_env, addr, treg, t1, tsize);
+static bool trans_brki(DisasContext *dc, arg_typeb_br *arg)
+{
+ uint32_t imm = arg->imm;
- tcg_temp_free_i32(t1);
- tcg_temp_free_i32(treg);
- tcg_temp_free_i32(tsize);
+ if (trap_userspace(dc, imm != 0x8 && imm != 0x18)) {
+ return true;
}
-
- if (ex) {
- gen_set_label(swx_skip);
+ if (invalid_delay_slot(dc, "brki")) {
+ return true;
}
- tcg_temp_free(addr);
-}
-
-static inline void eval_cc(DisasContext *dc, unsigned int cc,
- TCGv_i32 d, TCGv_i32 a)
-{
- static const int mb_to_tcg_cc[] = {
- [CC_EQ] = TCG_COND_EQ,
- [CC_NE] = TCG_COND_NE,
- [CC_LT] = TCG_COND_LT,
- [CC_LE] = TCG_COND_LE,
- [CC_GE] = TCG_COND_GE,
- [CC_GT] = TCG_COND_GT,
- };
+ tcg_gen_movi_i32(cpu_pc, imm);
+ if (arg->rd) {
+ tcg_gen_movi_i32(cpu_R[arg->rd], dc->base.pc_next);
+ }
+ tcg_gen_movi_tl(cpu_res_addr, -1);
- switch (cc) {
- case CC_EQ:
- case CC_NE:
- case CC_LT:
- case CC_LE:
- case CC_GE:
- case CC_GT:
- tcg_gen_setcondi_i32(mb_to_tcg_cc[cc], d, a, 0);
+#ifdef CONFIG_USER_ONLY
+ switch (imm) {
+ case 0x8: /* syscall trap */
+ gen_raise_exception_sync(dc, EXCP_SYSCALL);
break;
- default:
- cpu_abort(CPU(dc->cpu), "Unknown condition code %x.\n", cc);
+ case 0x18: /* debug trap */
+ gen_raise_exception_sync(dc, EXCP_DEBUG);
break;
+ default: /* eliminated with trap_userspace check */
+ g_assert_not_reached();
}
+#else
+ uint32_t msr_to_set = 0;
+
+ if (imm != 0x18) {
+ msr_to_set |= MSR_BIP;
+ }
+ if (imm == 0x8 || imm == 0x18) {
+ /* MSR_UM and MSR_VM are in tb_flags, so we know their value. */
+ msr_to_set |= (dc->tb_flags & (MSR_UM | MSR_VM)) << 1;
+ tcg_gen_andi_i32(cpu_msr, cpu_msr,
+ ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM));
+ }
+ tcg_gen_ori_i32(cpu_msr, cpu_msr, msr_to_set);
+ dc->base.is_jmp = DISAS_EXIT;
+#endif
+
+ return true;
}
-static void eval_cond_jmp(DisasContext *dc, TCGv_i32 pc_true, TCGv_i32 pc_false)
+static bool trans_mbar(DisasContext *dc, arg_mbar *arg)
{
- TCGv_i32 zero = tcg_const_i32(0);
+ int mbar_imm = arg->imm;
- tcg_gen_movcond_i32(TCG_COND_NE, cpu_pc,
- cpu_btaken, zero,
- pc_true, pc_false);
+ /* Note that mbar is a specialized branch instruction. */
+ if (invalid_delay_slot(dc, "mbar")) {
+ return true;
+ }
- tcg_temp_free_i32(zero);
-}
+ /* Data access memory barrier. */
+ if ((mbar_imm & 2) == 0) {
+ tcg_gen_mb(TCG_BAR_SC | TCG_MO_ALL);
+ }
-static void dec_setup_dslot(DisasContext *dc)
-{
- TCGv_i32 tmp = tcg_const_i32(dc->type_b && (dc->tb_flags & IMM_FLAG));
+ /* Sleep. */
+ if (mbar_imm & 16) {
+ TCGv_i32 tmp_1;
- dc->delayed_branch = 2;
- dc->tb_flags |= D_FLAG;
+ if (trap_userspace(dc, true)) {
+ /* Sleep is a privileged instruction. */
+ return true;
+ }
- tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUMBState, bimm));
- tcg_temp_free_i32(tmp);
-}
+ t_sync_flags(dc);
-static void dec_bcc(DisasContext *dc)
-{
- unsigned int cc;
- unsigned int dslot;
+ tmp_1 = tcg_const_i32(1);
+ tcg_gen_st_i32(tmp_1, cpu_env,
+ -offsetof(MicroBlazeCPU, env)
+ +offsetof(CPUState, halted));
+ tcg_temp_free_i32(tmp_1);
- cc = EXTRACT_FIELD(dc->ir, 21, 23);
- dslot = dc->ir & (1 << 25);
+ tcg_gen_movi_i32(cpu_pc, dc->base.pc_next + 4);
- dc->delayed_branch = 1;
- if (dslot) {
- dec_setup_dslot(dc);
+ gen_raise_exception(dc, EXCP_HLT);
}
- if (dc->type_b) {
- dc->jmp = JMP_DIRECT_CC;
- dc->jmp_pc = dc->base.pc_next + dec_alu_typeb_imm(dc);
- tcg_gen_movi_i32(cpu_btarget, dc->jmp_pc);
- } else {
- dc->jmp = JMP_INDIRECT;
- tcg_gen_addi_i32(cpu_btarget, cpu_R[dc->rb], dc->base.pc_next);
- }
- eval_cc(dc, cc, cpu_btaken, cpu_R[dc->ra]);
+ /*
+ * If !(mbar_imm & 1), this is an instruction access memory barrier
+ * and we need to end the TB so that we recognize self-modified
+ * code immediately.
+ *
+ * However, there are some data mbars that need the TB break
+ * (and return to main loop) to recognize interrupts right away.
+ * E.g. recognizing a change to an interrupt controller register.
+ *
+ * Therefore, choose to end the TB always.
+ */
+ dc->base.is_jmp = DISAS_EXIT_NEXT;
+ return true;
}
-static void dec_br(DisasContext *dc)
+static bool do_rts(DisasContext *dc, arg_typeb_bc *arg, int to_set)
{
- unsigned int dslot, link, abs, mbar;
+ if (trap_userspace(dc, to_set)) {
+ return true;
+ }
+ if (invalid_delay_slot(dc, "rts")) {
+ return true;
+ }
- dslot = dc->ir & (1 << 20);
- abs = dc->ir & (1 << 19);
- link = dc->ir & (1 << 18);
+ dc->tb_flags_to_set |= to_set;
+ setup_dslot(dc, true);
- /* Memory barrier. */
- mbar = (dc->ir >> 16) & 31;
- if (mbar == 2 && dc->imm == 4) {
- uint16_t mbar_imm = dc->rd;
+ dc->jmp_cond = TCG_COND_ALWAYS;
+ dc->jmp_dest = -1;
+ tcg_gen_addi_i32(cpu_btarget, reg_for_read(dc, arg->ra), arg->imm);
+ return true;
+}
- /* Data access memory barrier. */
- if ((mbar_imm & 2) == 0) {
- tcg_gen_mb(TCG_BAR_SC | TCG_MO_ALL);
- }
+#define DO_RTS(NAME, IFLAG) \
+ static bool trans_##NAME(DisasContext *dc, arg_typeb_bc *arg) \
+ { return do_rts(dc, arg, IFLAG); }
- /* mbar IMM & 16 decodes to sleep. */
- if (mbar_imm & 16) {
- TCGv_i32 tmp_1;
+DO_RTS(rtbd, DRTB_FLAG)
+DO_RTS(rtid, DRTI_FLAG)
+DO_RTS(rted, DRTE_FLAG)
+DO_RTS(rtsd, 0)
- if (trap_userspace(dc, true)) {
- /* Sleep is a privileged instruction. */
- return;
- }
+static bool trans_zero(DisasContext *dc, arg_zero *arg)
+{
+ /* If opcode_0_illegal, trap. */
+ if (dc->cfg->opcode_0_illegal) {
+ trap_illegal(dc, true);
+ return true;
+ }
+ /*
+ * Otherwise, this is "add r0, r0, r0".
+ * Continue to trans_add so that MSR[C] gets cleared.
+ */
+ return false;
+}
- t_sync_flags(dc);
+static void msr_read(DisasContext *dc, TCGv_i32 d)
+{
+ TCGv_i32 t;
- tmp_1 = tcg_const_i32(1);
- tcg_gen_st_i32(tmp_1, cpu_env,
- -offsetof(MicroBlazeCPU, env)
- +offsetof(CPUState, halted));
- tcg_temp_free_i32(tmp_1);
+ /* Replicate the cpu_msr_c boolean into the proper bit and the copy. */
+ t = tcg_temp_new_i32();
+ tcg_gen_muli_i32(t, cpu_msr_c, MSR_C | MSR_CC);
+ tcg_gen_or_i32(d, cpu_msr, t);
+ tcg_temp_free_i32(t);
+}
- tcg_gen_movi_i32(cpu_pc, dc->base.pc_next + 4);
+static bool do_msrclrset(DisasContext *dc, arg_type_msr *arg, bool set)
+{
+ uint32_t imm = arg->imm;
- gen_raise_exception(dc, EXCP_HLT);
- return;
- }
- /* Break the TB. */
- dc->cpustate_changed = 1;
- return;
+ if (trap_userspace(dc, imm != MSR_C)) {
+ return true;
}
- if (abs && link && !dslot) {
- if (dc->type_b) {
- /* BRKI */
- uint32_t imm = dec_alu_typeb_imm(dc);
- if (trap_userspace(dc, imm != 8 && imm != 0x18)) {
- return;
- }
- } else {
- /* BRK */
- if (trap_userspace(dc, true)) {
- return;
- }
- }
+ if (arg->rd) {
+ msr_read(dc, cpu_R[arg->rd]);
}
- dc->delayed_branch = 1;
- if (dslot) {
- dec_setup_dslot(dc);
- }
- if (link && dc->rd) {
- tcg_gen_movi_i32(cpu_R[dc->rd], dc->base.pc_next);
+ /*
+ * Handle the carry bit separately.
+ * This is the only bit that userspace can modify.
+ */
+ if (imm & MSR_C) {
+ tcg_gen_movi_i32(cpu_msr_c, set);
}
- if (abs) {
- if (dc->type_b) {
- uint32_t dest = dec_alu_typeb_imm(dc);
+ /*
+ * MSR_C and MSR_CC set above.
+ * MSR_PVR is not writable, and is always clear.
+ */
+ imm &= ~(MSR_C | MSR_CC | MSR_PVR);
- dc->jmp = JMP_DIRECT;
- dc->jmp_pc = dest;
- tcg_gen_movi_i32(cpu_btarget, dest);
- if (link && !dslot) {
- switch (dest) {
- case 8:
- case 0x18:
- gen_raise_exception_sync(dc, EXCP_BREAK);
- break;
- case 0:
- gen_raise_exception_sync(dc, EXCP_DEBUG);
- break;
- }
- }
+ if (imm != 0) {
+ if (set) {
+ tcg_gen_ori_i32(cpu_msr, cpu_msr, imm);
} else {
- dc->jmp = JMP_INDIRECT;
- tcg_gen_mov_i32(cpu_btarget, cpu_R[dc->rb]);
- if (link && !dslot) {
- gen_raise_exception_sync(dc, EXCP_BREAK);
- }
+ tcg_gen_andi_i32(cpu_msr, cpu_msr, ~imm);
}
- } else if (dc->type_b) {
- dc->jmp = JMP_DIRECT;
- dc->jmp_pc = dc->base.pc_next + dec_alu_typeb_imm(dc);
- tcg_gen_movi_i32(cpu_btarget, dc->jmp_pc);
- } else {
- dc->jmp = JMP_INDIRECT;
- tcg_gen_addi_i32(cpu_btarget, cpu_R[dc->rb], dc->base.pc_next);
+ dc->base.is_jmp = DISAS_EXIT_NEXT;
}
- tcg_gen_movi_i32(cpu_btaken, 1);
+ return true;
}
-static inline void do_rti(DisasContext *dc)
+static bool trans_msrclr(DisasContext *dc, arg_type_msr *arg)
{
- TCGv_i32 t0, t1;
- t0 = tcg_temp_new_i32();
- t1 = tcg_temp_new_i32();
- tcg_gen_mov_i32(t1, cpu_msr);
- tcg_gen_shri_i32(t0, t1, 1);
- tcg_gen_ori_i32(t1, t1, MSR_IE);
- tcg_gen_andi_i32(t0, t0, (MSR_VM | MSR_UM));
-
- tcg_gen_andi_i32(t1, t1, ~(MSR_VM | MSR_UM));
- tcg_gen_or_i32(t1, t1, t0);
- msr_write(dc, t1);
- tcg_temp_free_i32(t1);
- tcg_temp_free_i32(t0);
- dc->tb_flags &= ~DRTI_FLAG;
+ return do_msrclrset(dc, arg, false);
}
-static inline void do_rtb(DisasContext *dc)
+static bool trans_msrset(DisasContext *dc, arg_type_msr *arg)
{
- TCGv_i32 t0, t1;
- t0 = tcg_temp_new_i32();
- t1 = tcg_temp_new_i32();
- tcg_gen_mov_i32(t1, cpu_msr);
- tcg_gen_andi_i32(t1, t1, ~MSR_BIP);
- tcg_gen_shri_i32(t0, t1, 1);
- tcg_gen_andi_i32(t0, t0, (MSR_VM | MSR_UM));
-
- tcg_gen_andi_i32(t1, t1, ~(MSR_VM | MSR_UM));
- tcg_gen_or_i32(t1, t1, t0);
- msr_write(dc, t1);
- tcg_temp_free_i32(t1);
- tcg_temp_free_i32(t0);
- dc->tb_flags &= ~DRTB_FLAG;
+ return do_msrclrset(dc, arg, true);
}
-static inline void do_rte(DisasContext *dc)
+static bool trans_mts(DisasContext *dc, arg_mts *arg)
{
- TCGv_i32 t0, t1;
- t0 = tcg_temp_new_i32();
- t1 = tcg_temp_new_i32();
-
- tcg_gen_mov_i32(t1, cpu_msr);
- tcg_gen_ori_i32(t1, t1, MSR_EE);
- tcg_gen_andi_i32(t1, t1, ~MSR_EIP);
- tcg_gen_shri_i32(t0, t1, 1);
- tcg_gen_andi_i32(t0, t0, (MSR_VM | MSR_UM));
+ if (trap_userspace(dc, true)) {
+ return true;
+ }
- tcg_gen_andi_i32(t1, t1, ~(MSR_VM | MSR_UM));
- tcg_gen_or_i32(t1, t1, t0);
- msr_write(dc, t1);
- tcg_temp_free_i32(t1);
- tcg_temp_free_i32(t0);
- dc->tb_flags &= ~DRTE_FLAG;
-}
+#ifdef CONFIG_USER_ONLY
+ g_assert_not_reached();
+#else
+ if (arg->e && arg->rs != 0x1003) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "Invalid extended mts reg 0x%x\n", arg->rs);
+ return true;
+ }
-static void dec_rts(DisasContext *dc)
-{
- unsigned int b_bit, i_bit, e_bit;
+ TCGv_i32 src = reg_for_read(dc, arg->ra);
+ switch (arg->rs) {
+ case SR_MSR:
+ /* Install MSR_C. */
+ tcg_gen_extract_i32(cpu_msr_c, src, 2, 1);
+ /*
+ * Clear MSR_C and MSR_CC;
+ * MSR_PVR is not writable, and is always clear.
+ */
+ tcg_gen_andi_i32(cpu_msr, src, ~(MSR_C | MSR_CC | MSR_PVR));
+ break;
+ case SR_FSR:
+ tcg_gen_st_i32(src, cpu_env, offsetof(CPUMBState, fsr));
+ break;
+ case 0x800:
+ tcg_gen_st_i32(src, cpu_env, offsetof(CPUMBState, slr));
+ break;
+ case 0x802:
+ tcg_gen_st_i32(src, cpu_env, offsetof(CPUMBState, shr));
+ break;
- i_bit = dc->ir & (1 << 21);
- b_bit = dc->ir & (1 << 22);
- e_bit = dc->ir & (1 << 23);
+ case 0x1000: /* PID */
+ case 0x1001: /* ZPR */
+ case 0x1002: /* TLBX */
+ case 0x1003: /* TLBLO */
+ case 0x1004: /* TLBHI */
+ case 0x1005: /* TLBSX */
+ {
+ TCGv_i32 tmp_ext = tcg_const_i32(arg->e);
+ TCGv_i32 tmp_reg = tcg_const_i32(arg->rs & 7);
+
+ gen_helper_mmu_write(cpu_env, tmp_ext, tmp_reg, src);
+ tcg_temp_free_i32(tmp_reg);
+ tcg_temp_free_i32(tmp_ext);
+ }
+ break;
- if (trap_userspace(dc, i_bit || b_bit || e_bit)) {
- return;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "Invalid mts reg 0x%x\n", arg->rs);
+ return true;
}
+ dc->base.is_jmp = DISAS_EXIT_NEXT;
+ return true;
+#endif
+}
- dec_setup_dslot(dc);
+static bool trans_mfs(DisasContext *dc, arg_mfs *arg)
+{
+ TCGv_i32 dest = reg_for_write(dc, arg->rd);
- if (i_bit) {
- dc->tb_flags |= DRTI_FLAG;
- } else if (b_bit) {
- dc->tb_flags |= DRTB_FLAG;
- } else if (e_bit) {
- dc->tb_flags |= DRTE_FLAG;
+ if (arg->e) {
+ switch (arg->rs) {
+ case SR_EAR:
+ {
+ TCGv_i64 t64 = tcg_temp_new_i64();
+ tcg_gen_ld_i64(t64, cpu_env, offsetof(CPUMBState, ear));
+ tcg_gen_extrh_i64_i32(dest, t64);
+ tcg_temp_free_i64(t64);
+ }
+ return true;
+#ifndef CONFIG_USER_ONLY
+ case 0x1003: /* TLBLO */
+ /* Handled below. */
+ break;
+#endif
+ case 0x2006 ... 0x2009:
+ /* High bits of PVR6-9 not implemented. */
+ tcg_gen_movi_i32(dest, 0);
+ return true;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "Invalid extended mfs reg 0x%x\n", arg->rs);
+ return true;
+ }
}
- dc->jmp = JMP_INDIRECT;
- tcg_gen_movi_i32(cpu_btaken, 1);
- tcg_gen_add_i32(cpu_btarget, cpu_R[dc->ra], *dec_alu_op_b(dc));
-}
+ switch (arg->rs) {
+ case SR_PC:
+ tcg_gen_movi_i32(dest, dc->base.pc_next);
+ break;
+ case SR_MSR:
+ msr_read(dc, dest);
+ break;
+ case SR_EAR:
+ {
+ TCGv_i64 t64 = tcg_temp_new_i64();
+ tcg_gen_ld_i64(t64, cpu_env, offsetof(CPUMBState, ear));
+ tcg_gen_extrl_i64_i32(dest, t64);
+ tcg_temp_free_i64(t64);
+ }
+ break;
+ case SR_ESR:
+ tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, esr));
+ break;
+ case SR_FSR:
+ tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, fsr));
+ break;
+ case SR_BTR:
+ tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, btr));
+ break;
+ case SR_EDR:
+ tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, edr));
+ break;
+ case 0x800:
+ tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, slr));
+ break;
+ case 0x802:
+ tcg_gen_ld_i32(dest, cpu_env, offsetof(CPUMBState, shr));
+ break;
-static int dec_check_fpuv2(DisasContext *dc)
-{
- if ((dc->cpu->cfg.use_fpu != 2) && (dc->tb_flags & MSR_EE_FLAG)) {
- gen_raise_hw_excp(dc, ESR_EC_FPU);
+#ifndef CONFIG_USER_ONLY
+ case 0x1000: /* PID */
+ case 0x1001: /* ZPR */
+ case 0x1002: /* TLBX */
+ case 0x1003: /* TLBLO */
+ case 0x1004: /* TLBHI */
+ case 0x1005: /* TLBSX */
+ {
+ TCGv_i32 tmp_ext = tcg_const_i32(arg->e);
+ TCGv_i32 tmp_reg = tcg_const_i32(arg->rs & 7);
+
+ gen_helper_mmu_read(dest, cpu_env, tmp_ext, tmp_reg);
+ tcg_temp_free_i32(tmp_reg);
+ tcg_temp_free_i32(tmp_ext);
+ }
+ break;
+#endif
+
+ case 0x2000 ... 0x200c:
+ tcg_gen_ld_i32(dest, cpu_env,
+ offsetof(MicroBlazeCPU, cfg.pvr_regs[arg->rs - 0x2000])
+ - offsetof(MicroBlazeCPU, env));
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "Invalid mfs reg 0x%x\n", arg->rs);
+ break;
}
- return (dc->cpu->cfg.use_fpu == 2) ? PVR2_USE_FPU2_MASK : 0;
+ return true;
}
-static void dec_fpu(DisasContext *dc)
+static void do_rti(DisasContext *dc)
{
- unsigned int fpu_insn;
+ TCGv_i32 tmp = tcg_temp_new_i32();
- if (trap_illegal(dc, !dc->cpu->cfg.use_fpu)) {
- return;
- }
+ tcg_gen_shri_i32(tmp, cpu_msr, 1);
+ tcg_gen_ori_i32(cpu_msr, cpu_msr, MSR_IE);
+ tcg_gen_andi_i32(tmp, tmp, MSR_VM | MSR_UM);
+ tcg_gen_andi_i32(cpu_msr, cpu_msr, ~(MSR_VM | MSR_UM));
+ tcg_gen_or_i32(cpu_msr, cpu_msr, tmp);
- fpu_insn = (dc->ir >> 7) & 7;
+ tcg_temp_free_i32(tmp);
+}
- switch (fpu_insn) {
- case 0:
- gen_helper_fadd(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra],
- cpu_R[dc->rb]);
- break;
+static void do_rtb(DisasContext *dc)
+{
+ TCGv_i32 tmp = tcg_temp_new_i32();
- case 1:
- gen_helper_frsub(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra],
- cpu_R[dc->rb]);
- break;
+ tcg_gen_shri_i32(tmp, cpu_msr, 1);
+ tcg_gen_andi_i32(cpu_msr, cpu_msr, ~(MSR_VM | MSR_UM | MSR_BIP));
+ tcg_gen_andi_i32(tmp, tmp, (MSR_VM | MSR_UM));
+ tcg_gen_or_i32(cpu_msr, cpu_msr, tmp);
- case 2:
- gen_helper_fmul(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra],
- cpu_R[dc->rb]);
- break;
+ tcg_temp_free_i32(tmp);
+}
- case 3:
- gen_helper_fdiv(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra],
- cpu_R[dc->rb]);
- break;
+static void do_rte(DisasContext *dc)
+{
+ TCGv_i32 tmp = tcg_temp_new_i32();
- case 4:
- switch ((dc->ir >> 4) & 7) {
- case 0:
- gen_helper_fcmp_un(cpu_R[dc->rd], cpu_env,
- cpu_R[dc->ra], cpu_R[dc->rb]);
- break;
- case 1:
- gen_helper_fcmp_lt(cpu_R[dc->rd], cpu_env,
- cpu_R[dc->ra], cpu_R[dc->rb]);
- break;
- case 2:
- gen_helper_fcmp_eq(cpu_R[dc->rd], cpu_env,
- cpu_R[dc->ra], cpu_R[dc->rb]);
- break;
- case 3:
- gen_helper_fcmp_le(cpu_R[dc->rd], cpu_env,
- cpu_R[dc->ra], cpu_R[dc->rb]);
- break;
- case 4:
- gen_helper_fcmp_gt(cpu_R[dc->rd], cpu_env,
- cpu_R[dc->ra], cpu_R[dc->rb]);
- break;
- case 5:
- gen_helper_fcmp_ne(cpu_R[dc->rd], cpu_env,
- cpu_R[dc->ra], cpu_R[dc->rb]);
- break;
- case 6:
- gen_helper_fcmp_ge(cpu_R[dc->rd], cpu_env,
- cpu_R[dc->ra], cpu_R[dc->rb]);
- break;
- default:
- qemu_log_mask(LOG_UNIMP,
- "unimplemented fcmp fpu_insn=%x pc=%x"
- " opc=%x\n",
- fpu_insn, (uint32_t)dc->base.pc_next,
- dc->opcode);
- dc->abort_at_next_insn = 1;
- break;
- }
- break;
+ tcg_gen_shri_i32(tmp, cpu_msr, 1);
+ tcg_gen_ori_i32(cpu_msr, cpu_msr, MSR_EE);
+ tcg_gen_andi_i32(tmp, tmp, (MSR_VM | MSR_UM));
+ tcg_gen_andi_i32(cpu_msr, cpu_msr, ~(MSR_VM | MSR_UM | MSR_EIP));
+ tcg_gen_or_i32(cpu_msr, cpu_msr, tmp);
- case 5:
- if (!dec_check_fpuv2(dc)) {
- return;
- }
- gen_helper_flt(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra]);
- break;
+ tcg_temp_free_i32(tmp);
+}
- case 6:
- if (!dec_check_fpuv2(dc)) {
- return;
- }
- gen_helper_fint(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra]);
- break;
+/* Insns connected to FSL or AXI stream attached devices. */
+static bool do_get(DisasContext *dc, int rd, int rb, int imm, int ctrl)
+{
+ TCGv_i32 t_id, t_ctrl;
- case 7:
- if (!dec_check_fpuv2(dc)) {
- return;
- }
- gen_helper_fsqrt(cpu_R[dc->rd], cpu_env, cpu_R[dc->ra]);
- break;
+ if (trap_userspace(dc, true)) {
+ return true;
+ }
- default:
- qemu_log_mask(LOG_UNIMP, "unimplemented FPU insn fpu_insn=%x pc=%x"
- " opc=%x\n",
- fpu_insn, (uint32_t)dc->base.pc_next, dc->opcode);
- dc->abort_at_next_insn = 1;
- break;
+ t_id = tcg_temp_new_i32();
+ if (rb) {
+ tcg_gen_andi_i32(t_id, cpu_R[rb], 0xf);
+ } else {
+ tcg_gen_movi_i32(t_id, imm);
}
+
+ t_ctrl = tcg_const_i32(ctrl);
+ gen_helper_get(reg_for_write(dc, rd), t_id, t_ctrl);
+ tcg_temp_free_i32(t_id);
+ tcg_temp_free_i32(t_ctrl);
+ return true;
}
-static void dec_null(DisasContext *dc)
+static bool trans_get(DisasContext *dc, arg_get *arg)
{
- if (trap_illegal(dc, true)) {
- return;
- }
- qemu_log_mask(LOG_GUEST_ERROR, "unknown insn pc=%x opc=%x\n",
- (uint32_t)dc->base.pc_next, dc->opcode);
- dc->abort_at_next_insn = 1;
+ return do_get(dc, arg->rd, 0, arg->imm, arg->ctrl);
}
-/* Insns connected to FSL or AXI stream attached devices. */
-static void dec_stream(DisasContext *dc)
+static bool trans_getd(DisasContext *dc, arg_getd *arg)
+{
+ return do_get(dc, arg->rd, arg->rb, 0, arg->ctrl);
+}
+
+static bool do_put(DisasContext *dc, int ra, int rb, int imm, int ctrl)
{
TCGv_i32 t_id, t_ctrl;
- int ctrl;
if (trap_userspace(dc, true)) {
- return;
+ return true;
}
t_id = tcg_temp_new_i32();
- if (dc->type_b) {
- tcg_gen_movi_i32(t_id, dc->imm & 0xf);
- ctrl = dc->imm >> 10;
+ if (rb) {
+ tcg_gen_andi_i32(t_id, cpu_R[rb], 0xf);
} else {
- tcg_gen_andi_i32(t_id, cpu_R[dc->rb], 0xf);
- ctrl = dc->imm >> 5;
+ tcg_gen_movi_i32(t_id, imm);
}
t_ctrl = tcg_const_i32(ctrl);
-
- if (dc->rd == 0) {
- gen_helper_put(t_id, t_ctrl, cpu_R[dc->ra]);
- } else {
- gen_helper_get(cpu_R[dc->rd], t_id, t_ctrl);
- }
+ gen_helper_put(t_id, t_ctrl, reg_for_read(dc, ra));
tcg_temp_free_i32(t_id);
tcg_temp_free_i32(t_ctrl);
+ return true;
}
-static struct decoder_info {
- struct {
- uint32_t bits;
- uint32_t mask;
- };
- void (*dec)(DisasContext *dc);
-} decinfo[] = {
- {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},
- {DEC_STREAM, dec_stream},
- {{0, 0}, dec_null}
-};
-
-static void old_decode(DisasContext *dc, uint32_t ir)
+static bool trans_put(DisasContext *dc, arg_put *arg)
{
- int i;
-
- dc->ir = ir;
-
- /* 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);
+ return do_put(dc, arg->ra, 0, arg->imm, arg->ctrl);
+}
- /* 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 bool trans_putd(DisasContext *dc, arg_putd *arg)
+{
+ return do_put(dc, arg->ra, arg->rb, 0, arg->ctrl);
}
static void mb_tr_init_disas_context(DisasContextBase *dcb, CPUState *cs)
MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
int bound;
- dc->cpu = cpu;
- dc->synced_flags = dc->tb_flags = dc->base.tb->flags;
- dc->delayed_branch = !!(dc->tb_flags & D_FLAG);
- dc->jmp = dc->delayed_branch ? JMP_INDIRECT : JMP_NOJMP;
- dc->cpustate_changed = 0;
- dc->abort_at_next_insn = 0;
+ dc->cfg = &cpu->cfg;
+ dc->tb_flags = dc->base.tb->flags;
dc->ext_imm = dc->base.tb->cs_base;
dc->r0 = NULL;
dc->r0_set = false;
+ dc->mem_index = cpu_mmu_index(&cpu->env, false);
+ dc->jmp_cond = dc->tb_flags & D_FLAG ? TCG_COND_ALWAYS : TCG_COND_NEVER;
+ dc->jmp_dest = -1;
bound = -(dc->base.pc_first | TARGET_PAGE_MASK) / 4;
dc->base.max_insns = MIN(dc->base.max_insns, bound);
}
static void mb_tr_insn_start(DisasContextBase *dcb, CPUState *cs)
-{
- tcg_gen_insn_start(dcb->pc_next);
-}
-
-static bool mb_tr_breakpoint_check(DisasContextBase *dcb, CPUState *cs,
- const CPUBreakpoint *bp)
{
DisasContext *dc = container_of(dcb, DisasContext, base);
- gen_raise_exception_sync(dc, EXCP_DEBUG);
-
- /*
- * The address covered by the breakpoint must be included in
- * [tb->pc, tb->pc + tb->size) in order to for it to be
- * properly cleared -- thus we increment the PC here so that
- * the logic setting tb->size below does the right thing.
- */
- dc->base.pc_next += 4;
- return true;
+ tcg_gen_insn_start(dc->base.pc_next, dc->tb_flags & ~MSR_TB_MASK);
+ dc->insn_start = tcg_last_op();
}
static void mb_tr_translate_insn(DisasContextBase *dcb, CPUState *cs)
(uint32_t)dc->base.pc_next);
}
- dc->clear_imm = 1;
+ dc->tb_flags_to_set = 0;
+
ir = cpu_ldl_code(env, dc->base.pc_next);
if (!decode(dc, ir)) {
- old_decode(dc, ir);
+ trap_illegal(dc, true);
}
if (dc->r0) {
dc->r0_set = false;
}
- if (dc->clear_imm && (dc->tb_flags & IMM_FLAG)) {
- dc->tb_flags &= ~IMM_FLAG;
+ /* Discard the imm global when its contents cannot be used. */
+ if ((dc->tb_flags & ~dc->tb_flags_to_set) & IMM_FLAG) {
tcg_gen_discard_i32(cpu_imm);
}
+
+ dc->tb_flags &= ~(IMM_FLAG | BIMM_FLAG | D_FLAG);
+ dc->tb_flags |= dc->tb_flags_to_set;
dc->base.pc_next += 4;
- if (dc->delayed_branch && --dc->delayed_branch == 0) {
- 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);
+ if (dc->jmp_cond != TCG_COND_NEVER && !(dc->tb_flags & D_FLAG)) {
+ /*
+ * Finish any return-from branch.
+ */
+ uint32_t rt_ibe = dc->tb_flags & (DRTI_FLAG | DRTB_FLAG | DRTE_FLAG);
+ if (unlikely(rt_ibe != 0)) {
+ dc->tb_flags &= ~(DRTI_FLAG | DRTB_FLAG | DRTE_FLAG);
+ if (rt_ibe & DRTI_FLAG) {
+ do_rti(dc);
+ } else if (rt_ibe & DRTB_FLAG) {
+ do_rtb(dc);
+ } else {
+ do_rte(dc);
+ }
}
- /* Clear the delay slot flag. */
- dc->tb_flags &= ~D_FLAG;
- dc->base.is_jmp = DISAS_JUMP;
- }
- /* Force an exit if the per-tb cpu state has changed. */
- if (dc->base.is_jmp == DISAS_NEXT && dc->cpustate_changed) {
- dc->base.is_jmp = DISAS_UPDATE;
- tcg_gen_movi_i32(cpu_pc, dc->base.pc_next);
+ /* Complete the branch, ending the TB. */
+ switch (dc->base.is_jmp) {
+ case DISAS_NORETURN:
+ /*
+ * E.g. illegal insn in a delay slot. We've already exited
+ * and will handle D_FLAG in mb_cpu_do_interrupt.
+ */
+ break;
+ case DISAS_NEXT:
+ /*
+ * Normal insn a delay slot.
+ * However, the return-from-exception type insns should
+ * return to the main loop, as they have adjusted MSR.
+ */
+ dc->base.is_jmp = (rt_ibe ? DISAS_EXIT_JUMP : DISAS_JUMP);
+ break;
+ case DISAS_EXIT_NEXT:
+ /*
+ * E.g. mts insn in a delay slot. Continue with btarget,
+ * but still return to the main loop.
+ */
+ dc->base.is_jmp = DISAS_EXIT_JUMP;
+ break;
+ default:
+ g_assert_not_reached();
+ }
}
}
{
DisasContext *dc = container_of(dcb, DisasContext, base);
- assert(!dc->abort_at_next_insn);
-
if (dc->base.is_jmp == DISAS_NORETURN) {
/* We have already exited the TB. */
return;
}
t_sync_flags(dc);
- if (dc->tb_flags & D_FLAG) {
- sync_jmpstate(dc);
- dc->jmp = JMP_NOJMP;
- }
switch (dc->base.is_jmp) {
case DISAS_TOO_MANY:
- assert(dc->jmp == JMP_NOJMP);
gen_goto_tb(dc, 0, dc->base.pc_next);
return;
- case DISAS_UPDATE:
- assert(dc->jmp == JMP_NOJMP);
- if (unlikely(cs->singlestep_enabled)) {
- gen_raise_exception(dc, EXCP_DEBUG);
- } else {
- tcg_gen_exit_tb(NULL, 0);
- }
- return;
+ case DISAS_EXIT:
+ break;
+ case DISAS_EXIT_NEXT:
+ tcg_gen_movi_i32(cpu_pc, dc->base.pc_next);
+ break;
+ case DISAS_EXIT_JUMP:
+ tcg_gen_mov_i32(cpu_pc, cpu_btarget);
+ tcg_gen_discard_i32(cpu_btarget);
+ break;
case DISAS_JUMP:
- switch (dc->jmp) {
- case JMP_INDIRECT:
- {
- TCGv_i32 tmp_pc = tcg_const_i32(dc->base.pc_next);
- eval_cond_jmp(dc, cpu_btarget, tmp_pc);
- tcg_temp_free_i32(tmp_pc);
-
- if (unlikely(cs->singlestep_enabled)) {
- gen_raise_exception(dc, EXCP_DEBUG);
- } else {
- tcg_gen_exit_tb(NULL, 0);
- }
- }
- return;
-
- case JMP_DIRECT_CC:
- {
- TCGLabel *l1 = gen_new_label();
- tcg_gen_brcondi_i32(TCG_COND_NE, cpu_btaken, 0, l1);
+ if (dc->jmp_dest != -1 && !(tb_cflags(dc->base.tb) & CF_NO_GOTO_TB)) {
+ /* Direct jump. */
+ tcg_gen_discard_i32(cpu_btarget);
+
+ if (dc->jmp_cond != TCG_COND_ALWAYS) {
+ /* Conditional direct jump. */
+ TCGLabel *taken = gen_new_label();
+ TCGv_i32 tmp = tcg_temp_new_i32();
+
+ /*
+ * Copy bvalue to a temp now, so we can discard bvalue.
+ * This can avoid writing bvalue to memory when the
+ * delay slot cannot raise an exception.
+ */
+ tcg_gen_mov_i32(tmp, cpu_bvalue);
+ tcg_gen_discard_i32(cpu_bvalue);
+
+ tcg_gen_brcondi_i32(dc->jmp_cond, tmp, 0, taken);
gen_goto_tb(dc, 1, dc->base.pc_next);
- gen_set_label(l1);
+ gen_set_label(taken);
}
- /* fall through */
-
- case JMP_DIRECT:
- gen_goto_tb(dc, 0, dc->jmp_pc);
+ gen_goto_tb(dc, 0, dc->jmp_dest);
return;
}
- /* fall through */
+
+ /* Indirect jump (or direct jump w/ goto_tb disabled) */
+ tcg_gen_mov_i32(cpu_pc, cpu_btarget);
+ tcg_gen_discard_i32(cpu_btarget);
+ tcg_gen_lookup_and_goto_ptr();
+ return;
default:
g_assert_not_reached();
}
+
+ /* Finish DISAS_EXIT_* */
+ if (unlikely(cs->singlestep_enabled)) {
+ gen_raise_exception(dc, EXCP_DEBUG);
+ } else {
+ tcg_gen_exit_tb(NULL, 0);
+ }
}
static void mb_tr_disas_log(const DisasContextBase *dcb, CPUState *cs)
.init_disas_context = mb_tr_init_disas_context,
.tb_start = mb_tr_tb_start,
.insn_start = mb_tr_insn_start,
- .breakpoint_check = mb_tr_breakpoint_check,
.translate_insn = mb_tr_translate_insn,
.tb_stop = mb_tr_tb_stop,
.disas_log = mb_tr_disas_log,
{
MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
CPUMBState *env = &cpu->env;
+ uint32_t iflags;
int i;
- if (!env) {
- return;
- }
-
- qemu_fprintf(f, "IN: PC=%x %s\n",
- env->pc, lookup_symbol(env->pc));
- qemu_fprintf(f, "rmsr=%x resr=%x rear=%" PRIx64 " "
- "imm=%x iflags=%x fsr=%x rbtr=%x\n",
- env->msr, env->esr, env->ear,
- env->imm, env->iflags, env->fsr, env->btr);
- qemu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n",
- env->btaken, env->btarget,
+ qemu_fprintf(f, "pc=0x%08x msr=0x%05x mode=%s(saved=%s) eip=%d ie=%d\n",
+ env->pc, env->msr,
(env->msr & MSR_UM) ? "user" : "kernel",
(env->msr & MSR_UMS) ? "user" : "kernel",
(bool)(env->msr & MSR_EIP),
(bool)(env->msr & MSR_IE));
- for (i = 0; i < 12; i++) {
- qemu_fprintf(f, "rpvr%2.2d=%8.8x ", i, env->pvr.regs[i]);
- if ((i + 1) % 4 == 0) {
- qemu_fprintf(f, "\n");
- }
+
+ iflags = env->iflags;
+ qemu_fprintf(f, "iflags: 0x%08x", iflags);
+ if (iflags & IMM_FLAG) {
+ qemu_fprintf(f, " IMM(0x%08x)", env->imm);
+ }
+ if (iflags & BIMM_FLAG) {
+ qemu_fprintf(f, " BIMM");
+ }
+ if (iflags & D_FLAG) {
+ qemu_fprintf(f, " D(btarget=0x%08x)", env->btarget);
+ }
+ if (iflags & DRTI_FLAG) {
+ qemu_fprintf(f, " DRTI");
+ }
+ if (iflags & DRTE_FLAG) {
+ qemu_fprintf(f, " DRTE");
+ }
+ if (iflags & DRTB_FLAG) {
+ qemu_fprintf(f, " DRTB");
}
+ if (iflags & ESR_ESS_FLAG) {
+ qemu_fprintf(f, " ESR_ESS(0x%04x)", iflags & ESR_ESS_MASK);
+ }
+
+ qemu_fprintf(f, "\nesr=0x%04x fsr=0x%02x btr=0x%08x edr=0x%x\n"
+ "ear=0x" TARGET_FMT_lx " slr=0x%x shr=0x%x\n",
+ env->esr, env->fsr, env->btr, env->edr,
+ env->ear, env->slr, env->shr);
- /* Registers that aren't modeled are reported as 0 */
- qemu_fprintf(f, "redr=%x rpid=0 rzpr=0 rtlbx=0 rtlbsx=0 "
- "rtlblo=0 rtlbhi=0\n", env->edr);
- qemu_fprintf(f, "slr=%x shr=%x\n", env->slr, env->shr);
for (i = 0; i < 32; i++) {
- qemu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
- if ((i + 1) % 4 == 0)
- qemu_fprintf(f, "\n");
- }
- qemu_fprintf(f, "\n\n");
+ qemu_fprintf(f, "r%2.2d=%08x%c",
+ i, env->regs[i], i % 4 == 3 ? '\n' : ' ');
+ }
+ qemu_fprintf(f, "\n");
}
void mb_tcg_init(void)
static const struct {
TCGv_i32 *var; int ofs; char name[8];
} i32s[] = {
- R(0), R(1), R(2), R(3), R(4), R(5), R(6), R(7),
+ /*
+ * Note that r0 is handled specially in reg_for_read
+ * and reg_for_write. Nothing should touch cpu_R[0].
+ * Leave that element NULL, which will assert quickly
+ * inside the tcg generator functions.
+ */
+ R(1), R(2), R(3), R(4), R(5), R(6), R(7),
R(8), R(9), R(10), R(11), R(12), R(13), R(14), R(15),
R(16), R(17), R(18), R(19), R(20), R(21), R(22), R(23),
R(24), R(25), R(26), R(27), R(28), R(29), R(30), R(31),
SP(msr_c),
SP(imm),
SP(iflags),
- SP(btaken),
+ SP(bvalue),
SP(btarget),
SP(res_val),
};
target_ulong *data)
{
env->pc = data[0];
+ env->iflags = data[1];
}
projects / qemu.git / blobdiff