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qemu-e2k/target/microblaze/translate.c
Richard Henderson 4b8936310b target/microblaze: Put MicroBlazeCPUConfig into DisasContext 
The bulk of the translator should not have access to the
complete cpu state, to avoid the temptation to examine bits
that are in run time, but not translation time context.

We do need access to the constant cpu configuration, and
that is sufficient, so put that into DisasContext.

Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-07 12:58:08 -07:00

1976 lines
54 KiB
C
Raw Blame History

/*
* Xilinx MicroBlaze emulation for qemu: main translation routines.
*
* Copyright (c) 2009 Edgar E. Iglesias.
* Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "disas/disas.h"
#include "exec/exec-all.h"
#include "tcg/tcg-op.h"
#include "exec/helper-proto.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) \
(((src) >> start) & ((1 << (end - start + 1)) - 1))
/* is_jmp field values */
#define DISAS_JUMP DISAS_TARGET_0 /* only pc 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_bvalue;
static TCGv_i32 cpu_btarget;
static TCGv_i32 cpu_iflags;
static TCGv cpu_res_addr;
static TCGv_i32 cpu_res_val;
#include "exec/gen-icount.h"
/* This is the state at translation time. */
typedef struct DisasContext {
DisasContextBase base;
const MicroBlazeCPUConfig *cfg;
/* TCG op of the current insn_start. */
TCGOp *insn_start;
TCGv_i32 r0;
bool r0_set;
/* Decoder. */
uint32_t ext_imm;
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)
{
if (dc->tb_flags & IMM_FLAG) {
return deposit32(dc->ext_imm, 0, 16, x);
}
return x;
}
/* Include the auto-generated decoder. */
#include "decode-insns.c.inc"
static void t_sync_flags(DisasContext *dc)
{
/* Synch the tb dependent flags between translator and runtime. */
if ((dc->tb_flags ^ dc->base.tb->flags) & IFLAGS_TB_MASK) {
tcg_gen_movi_i32(cpu_iflags, dc->tb_flags & IFLAGS_TB_MASK);
}
}
static void gen_raise_exception(DisasContext *dc, uint32_t index)
{
TCGv_i32 tmp = tcg_const_i32(index);
gen_helper_raise_exception(cpu_env, tmp);
tcg_temp_free_i32(tmp);
dc->base.is_jmp = DISAS_NORETURN;
}
static void gen_raise_exception_sync(DisasContext *dc, uint32_t index)
{
t_sync_flags(dc);
tcg_gen_movi_i32(cpu_pc, dc->base.pc_next);
gen_raise_exception(dc, index);
}
static void gen_raise_hw_excp(DisasContext *dc, uint32_t esr_ec)
{
TCGv_i32 tmp = tcg_const_i32(esr_ec);
tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUMBState, esr));
tcg_temp_free_i32(tmp);
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)) {
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_lookup_and_goto_ptr();
}
dc->base.is_jmp = DISAS_NORETURN;
}
/*
* Returns true if the insn an illegal operation.
* If exceptions are enabled, an exception is raised.
*/
static bool trap_illegal(DisasContext *dc, bool cond)
{
if (cond && (dc->tb_flags & MSR_EE)
&& dc->cfg->illegal_opcode_exception) {
gen_raise_hw_excp(dc, ESR_EC_ILLEGAL_OP);
}
return cond;
}
/*
* Returns true if the insn is illegal in userspace.
* If exceptions are enabled, an exception is raised.
*/
static bool trap_userspace(DisasContext *dc, bool cond)
{
bool cond_user = cond && dc->mem_index == MMU_USER_IDX;
if (cond_user && (dc->tb_flags & MSR_EE)) {
gen_raise_hw_excp(dc, ESR_EC_PRIVINSN);
}
return cond_user;
}
/*
* 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->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 false;
}
static TCGv_i32 reg_for_read(DisasContext *dc, int reg)
{
if (likely(reg != 0)) {
return cpu_R[reg];
}
if (!dc->r0_set) {
if (dc->r0 == NULL) {
dc->r0 = tcg_temp_new_i32();
}
tcg_gen_movi_i32(dc->r0, 0);
dc->r0_set = true;
}
return dc->r0;
}
static TCGv_i32 reg_for_write(DisasContext *dc, int reg)
{
if (likely(reg != 0)) {
return cpu_R[reg];
}
if (dc->r0 == NULL) {
dc->r0 = tcg_temp_new_i32();
}
return dc->r0;
}
static bool do_typea(DisasContext *dc, arg_typea *arg, bool side_effects,
void (*fn)(TCGv_i32, TCGv_i32, TCGv_i32))
{
TCGv_i32 rd, ra, rb;
if (arg->rd == 0 && !side_effects) {
return true;
}
rd = reg_for_write(dc, arg->rd);
ra = reg_for_read(dc, arg->ra);
rb = reg_for_read(dc, arg->rb);
fn(rd, ra, rb);
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))
{
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);
fni(rd, ra, arg->imm);
return true;
}
static bool do_typeb_val(DisasContext *dc, arg_typeb *arg, bool side_effects,
void (*fn)(TCGv_i32, TCGv_i32, TCGv_i32))
{
TCGv_i32 rd, ra, imm;
if (arg->rd == 0 && !side_effects) {
return true;
}
rd = reg_for_write(dc, arg->rd);
ra = reg_for_read(dc, arg->ra);
imm = tcg_const_i32(arg->imm);
fn(rd, ra, imm);
tcg_temp_free_i32(imm);
return true;
}
#define DO_TYPEA(NAME, SE, FN) \
static bool trans_##NAME(DisasContext *dc, arg_typea *a) \
{ return do_typea(dc, a, SE, FN); }
#define DO_TYPEA_CFG(NAME, CFG, SE, FN) \
static bool trans_##NAME(DisasContext *dc, arg_typea *a) \
{ 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)
{
TCGv_i32 zero = tcg_const_i32(0);
tcg_gen_add2_i32(out, cpu_msr_c, ina, zero, inb, zero);
tcg_temp_free_i32(zero);
}
/* Input and output carry. */
static void gen_addc(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
TCGv_i32 zero = tcg_const_i32(0);
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_add2_i32(tmp, cpu_msr_c, ina, zero, cpu_msr_c, zero);
tcg_gen_add2_i32(out, cpu_msr_c, tmp, cpu_msr_c, inb, zero);
tcg_temp_free_i32(tmp);
tcg_temp_free_i32(zero);
}
/* Input carry, but no output carry. */
static void gen_addkc(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
tcg_gen_add_i32(out, ina, inb);
tcg_gen_add_i32(out, out, cpu_msr_c);
}
DO_TYPEA(add, true, gen_add)
DO_TYPEA(addc, true, gen_addc)
DO_TYPEA(addk, false, tcg_gen_add_i32)
DO_TYPEA(addkc, true, gen_addkc)
DO_TYPEBV(addi, true, gen_add)
DO_TYPEBV(addic, true, gen_addc)
DO_TYPEBI(addik, false, tcg_gen_addi_i32)
DO_TYPEBV(addikc, true, gen_addkc)
static void gen_andni(TCGv_i32 out, TCGv_i32 ina, int32_t imm)
{
tcg_gen_andi_i32(out, ina, ~imm);
}
DO_TYPEA(and, false, tcg_gen_and_i32)
DO_TYPEBI(andi, false, tcg_gen_andi_i32)
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();
tcg_gen_setcond_i32(TCG_COND_LT, lt, inb, ina);
tcg_gen_sub_i32(out, inb, ina);
tcg_gen_deposit_i32(out, out, lt, 31, 1);
tcg_temp_free_i32(lt);
}
static void gen_cmpu(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
TCGv_i32 lt = tcg_temp_new_i32();
tcg_gen_setcond_i32(TCG_COND_LTU, lt, inb, ina);
tcg_gen_sub_i32(out, inb, ina);
tcg_gen_deposit_i32(out, out, lt, 31, 1);
tcg_temp_free_i32(lt);
}
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)
static void gen_pcmpeq(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
tcg_gen_setcond_i32(TCG_COND_EQ, out, ina, inb);
}
static void gen_pcmpne(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
tcg_gen_setcond_i32(TCG_COND_NE, out, ina, inb);
}
DO_TYPEA_CFG(pcmpbf, use_pcmp_instr, false, gen_helper_pcmpbf)
DO_TYPEA_CFG(pcmpeq, use_pcmp_instr, false, gen_pcmpeq)
DO_TYPEA_CFG(pcmpne, use_pcmp_instr, false, gen_pcmpne)
/* No input carry, but output carry. */
static void gen_rsub(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
tcg_gen_setcond_i32(TCG_COND_GEU, cpu_msr_c, inb, ina);
tcg_gen_sub_i32(out, inb, ina);
}
/* Input and output carry. */
static void gen_rsubc(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
TCGv_i32 zero = tcg_const_i32(0);
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_not_i32(tmp, ina);
tcg_gen_add2_i32(tmp, cpu_msr_c, tmp, zero, cpu_msr_c, zero);
tcg_gen_add2_i32(out, cpu_msr_c, tmp, cpu_msr_c, inb, zero);
tcg_temp_free_i32(zero);
tcg_temp_free_i32(tmp);
}
/* No input or output carry. */
static void gen_rsubk(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
tcg_gen_sub_i32(out, inb, ina);
}
/* Input carry, no output carry. */
static void gen_rsubkc(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
TCGv_i32 nota = tcg_temp_new_i32();
tcg_gen_not_i32(nota, ina);
tcg_gen_add_i32(out, inb, nota);
tcg_gen_add_i32(out, out, cpu_msr_c);
tcg_temp_free_i32(nota);
}
DO_TYPEA(rsub, true, gen_rsub)
DO_TYPEA(rsubc, true, gen_rsubc)
DO_TYPEA(rsubk, false, gen_rsubk)
DO_TYPEA(rsubkc, true, gen_rsubkc)
DO_TYPEBV(rsubi, true, gen_rsub)
DO_TYPEBV(rsubic, true, gen_rsubc)
DO_TYPEBV(rsubik, false, gen_rsubk)
DO_TYPEBV(rsubikc, true, gen_rsubkc)
DO_TYPEA0(sext8, false, tcg_gen_ext8s_i32)
DO_TYPEA0(sext16, false, tcg_gen_ext16s_i32)
static void gen_sra(TCGv_i32 out, TCGv_i32 ina)
{
tcg_gen_andi_i32(cpu_msr_c, ina, 1);
tcg_gen_sari_i32(out, ina, 1);
}
static void gen_src(TCGv_i32 out, TCGv_i32 ina)
{
TCGv_i32 tmp = tcg_temp_new_i32();
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 gen_srl(TCGv_i32 out, TCGv_i32 ina)
{
tcg_gen_andi_i32(cpu_msr_c, ina, 1);
tcg_gen_shri_i32(out, ina, 1);
}
DO_TYPEA0(sra, false, gen_sra)
DO_TYPEA0(src, false, gen_src)
DO_TYPEA0(srl, false, gen_srl)
static void gen_swaph(TCGv_i32 out, TCGv_i32 ina)
{
tcg_gen_rotri_i32(out, ina, 16);
}
DO_TYPEA0(swapb, false, tcg_gen_bswap32_i32)
DO_TYPEA0(swaph, false, gen_swaph)
static bool trans_wdic(DisasContext *dc, arg_wdic *a)
{
/* Cache operations are nops: only check for supervisor mode. */
trap_userspace(dc, true);
return true;
}
DO_TYPEA(xor, false, tcg_gen_xor_i32)
DO_TYPEBI(xori, false, tcg_gen_xori_i32)
static TCGv compute_ldst_addr_typea(DisasContext *dc, int ra, int rb)
{
TCGv ret = tcg_temp_new();
/* 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);
}
if ((ra == 1 || rb == 1) && dc->cfg->stackprot) {
gen_helper_stackprot(cpu_env, ret);
}
return ret;
}
static TCGv compute_ldst_addr_typeb(DisasContext *dc, int ra, int imm)
{
TCGv ret = tcg_temp_new();
/* 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 (ra == 1 && dc->cfg->stackprot) {
gen_helper_stackprot(cpu_env, ret);
}
return ret;
}
#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();
if (addr_size == 32 || ra == 0) {
if (rb) {
tcg_gen_extu_i32_tl(ret, cpu_R[rb]);
} else {
tcg_gen_movi_tl(ret, 0);
}
} else {
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));
}
}
return ret;
}
#endif
static void record_unaligned_ess(DisasContext *dc, int rd,
MemOp size, bool store)
{
uint32_t iflags = tcg_get_insn_start_param(dc->insn_start, 1);
iflags |= ESR_ESS_FLAG;
iflags |= rd << 5;
iflags |= store * ESR_S;
iflags |= (size == MO_32) * ESR_W;
tcg_set_insn_start_param(dc->insn_start, 1, iflags);
}
static bool do_load(DisasContext *dc, int rd, TCGv addr, MemOp mop,
int mem_index, bool rev)
{
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);
}
}
if (size > MO_8 &&
(dc->tb_flags & MSR_EE) &&
dc->cfg->unaligned_exceptions) {
record_unaligned_ess(dc, rd, size, false);
mop |= MO_ALIGN;
}
tcg_gen_qemu_ld_i32(reg_for_write(dc, rd), addr, mem_index, mop);
tcg_temp_free(addr);
return true;
}
static bool trans_lbu(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, false);
}
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);
}
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
}
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 bool trans_lhu(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, false);
}
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);
}
static bool trans_lhuea(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_TEUW, MMU_NOMMU_IDX, false);
#endif
}
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);
}
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);
}
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);
}
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 bool trans_lwi(DisasContext *dc, arg_typeb *arg)
{
TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
return do_load(dc, arg->rd, addr, MO_TEUL, dc->mem_index, false);
}
static bool trans_lwx(DisasContext *dc, arg_typea *arg)
{
TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
/* lwx does not throw unaligned access errors, so force alignment */
tcg_gen_andi_tl(addr, addr, ~3);
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 bool do_store(DisasContext *dc, int rd, TCGv addr, MemOp mop,
int mem_index, bool rev)
{
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);
}
}
if (size > MO_8 &&
(dc->tb_flags & MSR_EE) &&
dc->cfg->unaligned_exceptions) {
record_unaligned_ess(dc, rd, size, true);
mop |= MO_ALIGN;
}
tcg_gen_qemu_st_i32(reg_for_read(dc, rd), addr, mem_index, mop);
tcg_temp_free(addr);
return true;
}
static bool trans_sb(DisasContext *dc, arg_typea *arg)
{
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 bool trans_sbr(DisasContext *dc, arg_typea *arg)
{
TCGv addr = compute_ldst_addr_typea(dc, arg->ra, arg->rb);
return do_store(dc, arg->rd, addr, MO_UB, dc->mem_index, 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
}
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);
}
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);
}
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);
}
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
}
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);
}
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);
}
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);
}
static bool trans_swea(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_TEUL, MMU_NOMMU_IDX, false);
#endif
}
static bool trans_swi(DisasContext *dc, arg_typeb *arg)
{
TCGv addr = compute_ldst_addr_typeb(dc, arg->ra, arg->imm);
return do_store(dc, arg->rd, addr, MO_TEUL, dc->mem_index, false);
}
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;
/* swx does not throw unaligned access errors, so force alignment */
tcg_gen_andi_tl(addr, addr, ~3);
/*
* 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);
/*
* Compare the value loaded during lwx with current contents of
* the reserved location.
*/
tval = tcg_temp_new_i32();
tcg_gen_atomic_cmpxchg_i32(tval, cpu_res_addr, cpu_res_val,
reg_for_write(dc, arg->rd),
dc->mem_index, MO_TEUL);
tcg_gen_brcond_i32(TCG_COND_NE, cpu_res_val, tval, swx_fail);
tcg_temp_free_i32(tval);
/* Success */
tcg_gen_movi_i32(cpu_msr_c, 0);
tcg_gen_br(swx_done);
/* Failure */
gen_set_label(swx_fail);
tcg_gen_movi_i32(cpu_msr_c, 1);
gen_set_label(swx_done);
/*
* 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;
}
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;
}
}
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 (delay) {
setup_dslot(dc, dest_rb < 0);
}
if (link) {
tcg_gen_movi_i32(cpu_R[link], dc->base.pc_next);
}
/* 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;
}
#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_i32 zero, next;
if (invalid_delay_slot(dc, "bcc")) {
return true;
}
if (delay) {
setup_dslot(dc, dest_rb < 0);
}
dc->jmp_cond = cond;
/* Cache the condition register in cpu_bvalue across any delay slot. */
tcg_gen_mov_i32(cpu_bvalue, reg_for_read(dc, ra));
/* 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);
}
/* 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);
return true;
}
#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); }
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)
static bool trans_brk(DisasContext *dc, arg_typea_br *arg)
{
if (trap_userspace(dc, true)) {
return true;
}
if (invalid_delay_slot(dc, "brk")) {
return true;
}
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);
dc->base.is_jmp = DISAS_EXIT;
return true;
}
static bool trans_brki(DisasContext *dc, arg_typeb_br *arg)
{
uint32_t imm = arg->imm;
if (trap_userspace(dc, imm != 0x8 && imm != 0x18)) {
return true;
}
if (invalid_delay_slot(dc, "brki")) {
return true;
}
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);
#ifdef CONFIG_USER_ONLY
switch (imm) {
case 0x8: /* syscall trap */
gen_raise_exception_sync(dc, EXCP_SYSCALL);
break;
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 bool trans_mbar(DisasContext *dc, arg_mbar *arg)
{
int mbar_imm = arg->imm;
/* Note that mbar is a specialized branch instruction. */
if (invalid_delay_slot(dc, "mbar")) {
return true;
}
/* Data access memory barrier. */
if ((mbar_imm & 2) == 0) {
tcg_gen_mb(TCG_BAR_SC | TCG_MO_ALL);
}
/* Sleep. */
if (mbar_imm & 16) {
TCGv_i32 tmp_1;
if (trap_userspace(dc, true)) {
/* Sleep is a privileged instruction. */
return true;
}
t_sync_flags(dc);
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);
tcg_gen_movi_i32(cpu_pc, dc->base.pc_next + 4);
gen_raise_exception(dc, EXCP_HLT);
}
/*
* 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 bool do_rts(DisasContext *dc, arg_typeb_bc *arg, int to_set)
{
if (trap_userspace(dc, to_set)) {
return true;
}
if (invalid_delay_slot(dc, "rts")) {
return true;
}
dc->tb_flags_to_set |= to_set;
setup_dslot(dc, true);
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;
}
#define DO_RTS(NAME, IFLAG) \
static bool trans_##NAME(DisasContext *dc, arg_typeb_bc *arg) \
{ return do_rts(dc, arg, IFLAG); }
DO_RTS(rtbd, DRTB_FLAG)
DO_RTS(rtid, DRTI_FLAG)
DO_RTS(rted, DRTE_FLAG)
DO_RTS(rtsd, 0)
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;
}
static void msr_read(DisasContext *dc, TCGv_i32 d)
{
TCGv_i32 t;
/* 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);
}
static bool do_msrclrset(DisasContext *dc, arg_type_msr *arg, bool set)
{
uint32_t imm = arg->imm;
if (trap_userspace(dc, imm != MSR_C)) {
return true;
}
if (arg->rd) {
msr_read(dc, cpu_R[arg->rd]);
}
/*
* 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);
}
/*
* MSR_C and MSR_CC set above.
* MSR_PVR is not writable, and is always clear.
*/
imm &= ~(MSR_C | MSR_CC | MSR_PVR);
if (imm != 0) {
if (set) {
tcg_gen_ori_i32(cpu_msr, cpu_msr, imm);
} else {
tcg_gen_andi_i32(cpu_msr, cpu_msr, ~imm);
}
dc->base.is_jmp = DISAS_EXIT_NEXT;
}
return true;
}
static bool trans_msrclr(DisasContext *dc, arg_type_msr *arg)
{
return do_msrclrset(dc, arg, false);
}
static bool trans_msrset(DisasContext *dc, arg_type_msr *arg)
{
return do_msrclrset(dc, arg, true);
}
static bool trans_mts(DisasContext *dc, arg_mts *arg)
{
if (trap_userspace(dc, true)) {
return true;
}
#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;
}
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;
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;
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
}
static bool trans_mfs(DisasContext *dc, arg_mfs *arg)
{
TCGv_i32 dest = reg_for_write(dc, arg->rd);
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;
}
}
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;
#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 true;
}
static void do_rti(DisasContext *dc)
{
TCGv_i32 tmp = tcg_temp_new_i32();
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);
tcg_temp_free_i32(tmp);
}
static void do_rtb(DisasContext *dc)
{
TCGv_i32 tmp = tcg_temp_new_i32();
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);
tcg_temp_free_i32(tmp);
}
static void do_rte(DisasContext *dc)
{
TCGv_i32 tmp = tcg_temp_new_i32();
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);
tcg_temp_free_i32(tmp);
}
/* 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;
if (trap_userspace(dc, true)) {
return true;
}
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 bool trans_get(DisasContext *dc, arg_get *arg)
{
return do_get(dc, arg->rd, 0, arg->imm, arg->ctrl);
}
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;
if (trap_userspace(dc, true)) {
return true;
}
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_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 bool trans_put(DisasContext *dc, arg_put *arg)
{
return do_put(dc, arg->ra, 0, arg->imm, arg->ctrl);
}
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)
{
DisasContext *dc = container_of(dcb, DisasContext, base);
MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
int bound;
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_tb_start(DisasContextBase *dcb, CPUState *cs)
{
}
static void mb_tr_insn_start(DisasContextBase *dcb, CPUState *cs)
{
DisasContext *dc = container_of(dcb, DisasContext, base);
tcg_gen_insn_start(dc->base.pc_next, dc->tb_flags & ~MSR_TB_MASK);
dc->insn_start = tcg_last_op();
}
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;
}
static void mb_tr_translate_insn(DisasContextBase *dcb, CPUState *cs)
{
DisasContext *dc = container_of(dcb, DisasContext, base);
CPUMBState *env = cs->env_ptr;
uint32_t ir;
/* TODO: This should raise an exception, not terminate qemu. */
if (dc->base.pc_next & 3) {
cpu_abort(cs, "Microblaze: unaligned PC=%x\n",
(uint32_t)dc->base.pc_next);
}
dc->tb_flags_to_set = 0;
ir = cpu_ldl_code(env, dc->base.pc_next);
if (!decode(dc, ir)) {
trap_illegal(dc, true);
}
if (dc->r0) {
tcg_temp_free_i32(dc->r0);
dc->r0 = NULL;
dc->r0_set = false;
}
/* 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->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);
}
}
/* 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();
}
}
}
static void mb_tr_tb_stop(DisasContextBase *dcb, CPUState *cs)
{
DisasContext *dc = container_of(dcb, DisasContext, base);
if (dc->base.is_jmp == DISAS_NORETURN) {
/* We have already exited the TB. */
return;
}
t_sync_flags(dc);
switch (dc->base.is_jmp) {
case DISAS_TOO_MANY:
gen_goto_tb(dc, 0, dc->base.pc_next);
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:
if (dc->jmp_dest != -1 && !cs->singlestep_enabled) {
/* 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(taken);
}
gen_goto_tb(dc, 0, dc->jmp_dest);
return;
}
/* Indirect jump (or direct jump w/ singlestep) */
tcg_gen_mov_i32(cpu_pc, cpu_btarget);
tcg_gen_discard_i32(cpu_btarget);
if (unlikely(cs->singlestep_enabled)) {
gen_raise_exception(dc, EXCP_DEBUG);
} else {
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)
{
qemu_log("IN: %s\n", lookup_symbol(dcb->pc_first));
log_target_disas(cs, dcb->pc_first, dcb->tb->size);
}
static const TranslatorOps mb_tr_ops = {
.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,
};
void gen_intermediate_code(CPUState *cpu, TranslationBlock *tb, int max_insns)
{
DisasContext dc;
translator_loop(&mb_tr_ops, &dc.base, cpu, tb, max_insns);
}
void mb_cpu_dump_state(CPUState *cs, FILE *f, int flags)
{
MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
CPUMBState *env = &cpu->env;
uint32_t iflags;
int i;
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));
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);
for (i = 0; i < 32; i++) {
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)
{
#define R(X) { &cpu_R[X], offsetof(CPUMBState, regs[X]), "r" #X }
#define SP(X) { &cpu_##X, offsetof(CPUMBState, X), #X }
static const struct {
TCGv_i32 *var; int ofs; char name[8];
} i32s[] = {
/*
* 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(pc),
SP(msr),
SP(msr_c),
SP(imm),
SP(iflags),
SP(bvalue),
SP(btarget),
SP(res_val),
};
#undef R
#undef SP
for (int i = 0; i < ARRAY_SIZE(i32s); ++i) {
*i32s[i].var =
tcg_global_mem_new_i32(cpu_env, i32s[i].ofs, i32s[i].name);
}
cpu_res_addr =
tcg_global_mem_new(cpu_env, offsetof(CPUMBState, res_addr), "res_addr");
}
void restore_state_to_opc(CPUMBState *env, TranslationBlock *tb,
target_ulong *data)
{
env->pc = data[0];
env->iflags = data[1];
}
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