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translate.c
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translate.c
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/*
* Xtensa ISA:
* http://www.tensilica.com/products/literature-docs/documentation/xtensa-isa-databook.htm
*
* Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Open Source and Linux Lab nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "disas/disas.h"
#include "tcg-op.h"
#include "qemu/log.h"
#include "sysemu/sysemu.h"
#include "exec/cpu_ldst.h"
#include "exec/semihost.h"
#include "exec/helper-proto.h"
#include "exec/helper-gen.h"
#include "trace-tcg.h"
#include "exec/log.h"
typedef struct DisasContext {
const XtensaConfig *config;
TranslationBlock *tb;
uint32_t pc;
uint32_t next_pc;
int cring;
int ring;
uint32_t lbeg;
uint32_t lend;
TCGv_i32 litbase;
int is_jmp;
int singlestep_enabled;
bool sar_5bit;
bool sar_m32_5bit;
bool sar_m32_allocated;
TCGv_i32 sar_m32;
unsigned window;
bool debug;
bool icount;
TCGv_i32 next_icount;
unsigned cpenable;
} DisasContext;
static TCGv_env cpu_env;
static TCGv_i32 cpu_pc;
static TCGv_i32 cpu_R[16];
static TCGv_i32 cpu_FR[16];
static TCGv_i32 cpu_SR[256];
static TCGv_i32 cpu_UR[256];
#include "exec/gen-icount.h"
typedef struct XtensaReg {
const char *name;
uint64_t opt_bits;
enum {
SR_R = 1,
SR_W = 2,
SR_X = 4,
SR_RW = 3,
SR_RWX = 7,
} access;
} XtensaReg;
#define XTENSA_REG_ACCESS(regname, opt, acc) { \
.name = (regname), \
.opt_bits = XTENSA_OPTION_BIT(opt), \
.access = (acc), \
}
#define XTENSA_REG(regname, opt) XTENSA_REG_ACCESS(regname, opt, SR_RWX)
#define XTENSA_REG_BITS_ACCESS(regname, opt, acc) { \
.name = (regname), \
.opt_bits = (opt), \
.access = (acc), \
}
#define XTENSA_REG_BITS(regname, opt) \
XTENSA_REG_BITS_ACCESS(regname, opt, SR_RWX)
static const XtensaReg sregnames[256] = {
[LBEG] = XTENSA_REG("LBEG", XTENSA_OPTION_LOOP),
[LEND] = XTENSA_REG("LEND", XTENSA_OPTION_LOOP),
[LCOUNT] = XTENSA_REG("LCOUNT", XTENSA_OPTION_LOOP),
[SAR] = XTENSA_REG_BITS("SAR", XTENSA_OPTION_ALL),
[BR] = XTENSA_REG("BR", XTENSA_OPTION_BOOLEAN),
[LITBASE] = XTENSA_REG("LITBASE", XTENSA_OPTION_EXTENDED_L32R),
[SCOMPARE1] = XTENSA_REG("SCOMPARE1", XTENSA_OPTION_CONDITIONAL_STORE),
[ACCLO] = XTENSA_REG("ACCLO", XTENSA_OPTION_MAC16),
[ACCHI] = XTENSA_REG("ACCHI", XTENSA_OPTION_MAC16),
[MR] = XTENSA_REG("MR0", XTENSA_OPTION_MAC16),
[MR + 1] = XTENSA_REG("MR1", XTENSA_OPTION_MAC16),
[MR + 2] = XTENSA_REG("MR2", XTENSA_OPTION_MAC16),
[MR + 3] = XTENSA_REG("MR3", XTENSA_OPTION_MAC16),
[WINDOW_BASE] = XTENSA_REG("WINDOW_BASE", XTENSA_OPTION_WINDOWED_REGISTER),
[WINDOW_START] = XTENSA_REG("WINDOW_START",
XTENSA_OPTION_WINDOWED_REGISTER),
[PTEVADDR] = XTENSA_REG("PTEVADDR", XTENSA_OPTION_MMU),
[RASID] = XTENSA_REG("RASID", XTENSA_OPTION_MMU),
[ITLBCFG] = XTENSA_REG("ITLBCFG", XTENSA_OPTION_MMU),
[DTLBCFG] = XTENSA_REG("DTLBCFG", XTENSA_OPTION_MMU),
[IBREAKENABLE] = XTENSA_REG("IBREAKENABLE", XTENSA_OPTION_DEBUG),
[MEMCTL] = XTENSA_REG_BITS("MEMCTL", XTENSA_OPTION_ALL),
[CACHEATTR] = XTENSA_REG("CACHEATTR", XTENSA_OPTION_CACHEATTR),
[ATOMCTL] = XTENSA_REG("ATOMCTL", XTENSA_OPTION_ATOMCTL),
[IBREAKA] = XTENSA_REG("IBREAKA0", XTENSA_OPTION_DEBUG),
[IBREAKA + 1] = XTENSA_REG("IBREAKA1", XTENSA_OPTION_DEBUG),
[DBREAKA] = XTENSA_REG("DBREAKA0", XTENSA_OPTION_DEBUG),
[DBREAKA + 1] = XTENSA_REG("DBREAKA1", XTENSA_OPTION_DEBUG),
[DBREAKC] = XTENSA_REG("DBREAKC0", XTENSA_OPTION_DEBUG),
[DBREAKC + 1] = XTENSA_REG("DBREAKC1", XTENSA_OPTION_DEBUG),
[CONFIGID0] = XTENSA_REG_BITS_ACCESS("CONFIGID0", XTENSA_OPTION_ALL, SR_R),
[EPC1] = XTENSA_REG("EPC1", XTENSA_OPTION_EXCEPTION),
[EPC1 + 1] = XTENSA_REG("EPC2", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EPC1 + 2] = XTENSA_REG("EPC3", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EPC1 + 3] = XTENSA_REG("EPC4", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EPC1 + 4] = XTENSA_REG("EPC5", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EPC1 + 5] = XTENSA_REG("EPC6", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EPC1 + 6] = XTENSA_REG("EPC7", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[DEPC] = XTENSA_REG("DEPC", XTENSA_OPTION_EXCEPTION),
[EPS2] = XTENSA_REG("EPS2", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EPS2 + 1] = XTENSA_REG("EPS3", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EPS2 + 2] = XTENSA_REG("EPS4", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EPS2 + 3] = XTENSA_REG("EPS5", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EPS2 + 4] = XTENSA_REG("EPS6", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EPS2 + 5] = XTENSA_REG("EPS7", XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[CONFIGID1] = XTENSA_REG_BITS_ACCESS("CONFIGID1", XTENSA_OPTION_ALL, SR_R),
[EXCSAVE1] = XTENSA_REG("EXCSAVE1", XTENSA_OPTION_EXCEPTION),
[EXCSAVE1 + 1] = XTENSA_REG("EXCSAVE2",
XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EXCSAVE1 + 2] = XTENSA_REG("EXCSAVE3",
XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EXCSAVE1 + 3] = XTENSA_REG("EXCSAVE4",
XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EXCSAVE1 + 4] = XTENSA_REG("EXCSAVE5",
XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EXCSAVE1 + 5] = XTENSA_REG("EXCSAVE6",
XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[EXCSAVE1 + 6] = XTENSA_REG("EXCSAVE7",
XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT),
[CPENABLE] = XTENSA_REG("CPENABLE", XTENSA_OPTION_COPROCESSOR),
[INTSET] = XTENSA_REG_ACCESS("INTSET", XTENSA_OPTION_INTERRUPT, SR_RW),
[INTCLEAR] = XTENSA_REG_ACCESS("INTCLEAR", XTENSA_OPTION_INTERRUPT, SR_W),
[INTENABLE] = XTENSA_REG("INTENABLE", XTENSA_OPTION_INTERRUPT),
[PS] = XTENSA_REG_BITS("PS", XTENSA_OPTION_ALL),
[VECBASE] = XTENSA_REG("VECBASE", XTENSA_OPTION_RELOCATABLE_VECTOR),
[EXCCAUSE] = XTENSA_REG("EXCCAUSE", XTENSA_OPTION_EXCEPTION),
[DEBUGCAUSE] = XTENSA_REG_ACCESS("DEBUGCAUSE", XTENSA_OPTION_DEBUG, SR_R),
[CCOUNT] = XTENSA_REG("CCOUNT", XTENSA_OPTION_TIMER_INTERRUPT),
[PRID] = XTENSA_REG_ACCESS("PRID", XTENSA_OPTION_PROCESSOR_ID, SR_R),
[ICOUNT] = XTENSA_REG("ICOUNT", XTENSA_OPTION_DEBUG),
[ICOUNTLEVEL] = XTENSA_REG("ICOUNTLEVEL", XTENSA_OPTION_DEBUG),
[EXCVADDR] = XTENSA_REG("EXCVADDR", XTENSA_OPTION_EXCEPTION),
[CCOMPARE] = XTENSA_REG("CCOMPARE0", XTENSA_OPTION_TIMER_INTERRUPT),
[CCOMPARE + 1] = XTENSA_REG("CCOMPARE1",
XTENSA_OPTION_TIMER_INTERRUPT),
[CCOMPARE + 2] = XTENSA_REG("CCOMPARE2",
XTENSA_OPTION_TIMER_INTERRUPT),
[MISC] = XTENSA_REG("MISC0", XTENSA_OPTION_MISC_SR),
[MISC + 1] = XTENSA_REG("MISC1", XTENSA_OPTION_MISC_SR),
[MISC + 2] = XTENSA_REG("MISC2", XTENSA_OPTION_MISC_SR),
[MISC + 3] = XTENSA_REG("MISC3", XTENSA_OPTION_MISC_SR),
};
static const XtensaReg uregnames[256] = {
[THREADPTR] = XTENSA_REG("THREADPTR", XTENSA_OPTION_THREAD_POINTER),
[FCR] = XTENSA_REG("FCR", XTENSA_OPTION_FP_COPROCESSOR),
[FSR] = XTENSA_REG("FSR", XTENSA_OPTION_FP_COPROCESSOR),
};
void xtensa_translate_init(void)
{
static const char * const regnames[] = {
"ar0", "ar1", "ar2", "ar3",
"ar4", "ar5", "ar6", "ar7",
"ar8", "ar9", "ar10", "ar11",
"ar12", "ar13", "ar14", "ar15",
};
static const char * const fregnames[] = {
"f0", "f1", "f2", "f3",
"f4", "f5", "f6", "f7",
"f8", "f9", "f10", "f11",
"f12", "f13", "f14", "f15",
};
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
tcg_ctx.tcg_env = cpu_env;
cpu_pc = tcg_global_mem_new_i32(cpu_env,
offsetof(CPUXtensaState, pc), "pc");
for (i = 0; i < 16; i++) {
cpu_R[i] = tcg_global_mem_new_i32(cpu_env,
offsetof(CPUXtensaState, regs[i]),
regnames[i]);
}
for (i = 0; i < 16; i++) {
cpu_FR[i] = tcg_global_mem_new_i32(cpu_env,
offsetof(CPUXtensaState, fregs[i].f32[FP_F32_LOW]),
fregnames[i]);
}
for (i = 0; i < 256; ++i) {
if (sregnames[i].name) {
cpu_SR[i] = tcg_global_mem_new_i32(cpu_env,
offsetof(CPUXtensaState, sregs[i]),
sregnames[i].name);
}
}
for (i = 0; i < 256; ++i) {
if (uregnames[i].name) {
cpu_UR[i] = tcg_global_mem_new_i32(cpu_env,
offsetof(CPUXtensaState, uregs[i]),
uregnames[i].name);
}
}
}
static inline bool option_bits_enabled(DisasContext *dc, uint64_t opt)
{
return xtensa_option_bits_enabled(dc->config, opt);
}
static inline bool option_enabled(DisasContext *dc, int opt)
{
return xtensa_option_enabled(dc->config, opt);
}
static void init_litbase(DisasContext *dc)
{
if (dc->tb->flags & XTENSA_TBFLAG_LITBASE) {
dc->litbase = tcg_temp_local_new_i32();
tcg_gen_andi_i32(dc->litbase, cpu_SR[LITBASE], 0xfffff000);
}
}
static void reset_litbase(DisasContext *dc)
{
if (dc->tb->flags & XTENSA_TBFLAG_LITBASE) {
tcg_temp_free(dc->litbase);
}
}
static void init_sar_tracker(DisasContext *dc)
{
dc->sar_5bit = false;
dc->sar_m32_5bit = false;
dc->sar_m32_allocated = false;
}
static void reset_sar_tracker(DisasContext *dc)
{
if (dc->sar_m32_allocated) {
tcg_temp_free(dc->sar_m32);
}
}
static void gen_right_shift_sar(DisasContext *dc, TCGv_i32 sa)
{
tcg_gen_andi_i32(cpu_SR[SAR], sa, 0x1f);
if (dc->sar_m32_5bit) {
tcg_gen_discard_i32(dc->sar_m32);
}
dc->sar_5bit = true;
dc->sar_m32_5bit = false;
}
static void gen_left_shift_sar(DisasContext *dc, TCGv_i32 sa)
{
TCGv_i32 tmp = tcg_const_i32(32);
if (!dc->sar_m32_allocated) {
dc->sar_m32 = tcg_temp_local_new_i32();
dc->sar_m32_allocated = true;
}
tcg_gen_andi_i32(dc->sar_m32, sa, 0x1f);
tcg_gen_sub_i32(cpu_SR[SAR], tmp, dc->sar_m32);
dc->sar_5bit = false;
dc->sar_m32_5bit = true;
tcg_temp_free(tmp);
}
static void gen_exception(DisasContext *dc, int excp)
{
TCGv_i32 tmp = tcg_const_i32(excp);
gen_helper_exception(cpu_env, tmp);
tcg_temp_free(tmp);
}
static void gen_exception_cause(DisasContext *dc, uint32_t cause)
{
TCGv_i32 tpc = tcg_const_i32(dc->pc);
TCGv_i32 tcause = tcg_const_i32(cause);
gen_helper_exception_cause(cpu_env, tpc, tcause);
tcg_temp_free(tpc);
tcg_temp_free(tcause);
if (cause == ILLEGAL_INSTRUCTION_CAUSE ||
cause == SYSCALL_CAUSE) {
dc->is_jmp = DISAS_UPDATE;
}
}
static void gen_exception_cause_vaddr(DisasContext *dc, uint32_t cause,
TCGv_i32 vaddr)
{
TCGv_i32 tpc = tcg_const_i32(dc->pc);
TCGv_i32 tcause = tcg_const_i32(cause);
gen_helper_exception_cause_vaddr(cpu_env, tpc, tcause, vaddr);
tcg_temp_free(tpc);
tcg_temp_free(tcause);
}
static void gen_debug_exception(DisasContext *dc, uint32_t cause)
{
TCGv_i32 tpc = tcg_const_i32(dc->pc);
TCGv_i32 tcause = tcg_const_i32(cause);
gen_helper_debug_exception(cpu_env, tpc, tcause);
tcg_temp_free(tpc);
tcg_temp_free(tcause);
if (cause & (DEBUGCAUSE_IB | DEBUGCAUSE_BI | DEBUGCAUSE_BN)) {
dc->is_jmp = DISAS_UPDATE;
}
}
static bool gen_check_privilege(DisasContext *dc)
{
if (dc->cring) {
gen_exception_cause(dc, PRIVILEGED_CAUSE);
dc->is_jmp = DISAS_UPDATE;
return false;
}
return true;
}
static bool gen_check_cpenable(DisasContext *dc, unsigned cp)
{
if (option_enabled(dc, XTENSA_OPTION_COPROCESSOR) &&
!(dc->cpenable & (1 << cp))) {
gen_exception_cause(dc, COPROCESSOR0_DISABLED + cp);
dc->is_jmp = DISAS_UPDATE;
return false;
}
return true;
}
static void gen_jump_slot(DisasContext *dc, TCGv dest, int slot)
{
tcg_gen_mov_i32(cpu_pc, dest);
if (dc->icount) {
tcg_gen_mov_i32(cpu_SR[ICOUNT], dc->next_icount);
}
if (dc->singlestep_enabled) {
gen_exception(dc, EXCP_DEBUG);
} else {
if (slot >= 0) {
tcg_gen_goto_tb(slot);
tcg_gen_exit_tb((uintptr_t)dc->tb + slot);
} else {
tcg_gen_exit_tb(0);
}
}
dc->is_jmp = DISAS_UPDATE;
}
static void gen_jump(DisasContext *dc, TCGv dest)
{
gen_jump_slot(dc, dest, -1);
}
static void gen_jumpi(DisasContext *dc, uint32_t dest, int slot)
{
TCGv_i32 tmp = tcg_const_i32(dest);
#ifndef CONFIG_USER_ONLY
if (((dc->tb->pc ^ dest) & TARGET_PAGE_MASK) != 0) {
slot = -1;
}
#endif
gen_jump_slot(dc, tmp, slot);
tcg_temp_free(tmp);
}
static void gen_callw_slot(DisasContext *dc, int callinc, TCGv_i32 dest,
int slot)
{
TCGv_i32 tcallinc = tcg_const_i32(callinc);
tcg_gen_deposit_i32(cpu_SR[PS], cpu_SR[PS],
tcallinc, PS_CALLINC_SHIFT, PS_CALLINC_LEN);
tcg_temp_free(tcallinc);
tcg_gen_movi_i32(cpu_R[callinc << 2],
(callinc << 30) | (dc->next_pc & 0x3fffffff));
gen_jump_slot(dc, dest, slot);
}
static void gen_callw(DisasContext *dc, int callinc, TCGv_i32 dest)
{
gen_callw_slot(dc, callinc, dest, -1);
}
static void gen_callwi(DisasContext *dc, int callinc, uint32_t dest, int slot)
{
TCGv_i32 tmp = tcg_const_i32(dest);
#ifndef CONFIG_USER_ONLY
if (((dc->tb->pc ^ dest) & TARGET_PAGE_MASK) != 0) {
slot = -1;
}
#endif
gen_callw_slot(dc, callinc, tmp, slot);
tcg_temp_free(tmp);
}
static bool gen_check_loop_end(DisasContext *dc, int slot)
{
if (option_enabled(dc, XTENSA_OPTION_LOOP) &&
!(dc->tb->flags & XTENSA_TBFLAG_EXCM) &&
dc->next_pc == dc->lend) {
TCGLabel *label = gen_new_label();
tcg_gen_brcondi_i32(TCG_COND_EQ, cpu_SR[LCOUNT], 0, label);
tcg_gen_subi_i32(cpu_SR[LCOUNT], cpu_SR[LCOUNT], 1);
gen_jumpi(dc, dc->lbeg, slot);
gen_set_label(label);
gen_jumpi(dc, dc->next_pc, -1);
return true;
}
return false;
}
static void gen_jumpi_check_loop_end(DisasContext *dc, int slot)
{
if (!gen_check_loop_end(dc, slot)) {
gen_jumpi(dc, dc->next_pc, slot);
}
}
static void gen_brcond(DisasContext *dc, TCGCond cond,
TCGv_i32 t0, TCGv_i32 t1, uint32_t offset)
{
TCGLabel *label = gen_new_label();
tcg_gen_brcond_i32(cond, t0, t1, label);
gen_jumpi_check_loop_end(dc, 0);
gen_set_label(label);
gen_jumpi(dc, dc->pc + offset, 1);
}
static void gen_brcondi(DisasContext *dc, TCGCond cond,
TCGv_i32 t0, uint32_t t1, uint32_t offset)
{
TCGv_i32 tmp = tcg_const_i32(t1);
gen_brcond(dc, cond, t0, tmp, offset);
tcg_temp_free(tmp);
}
static bool gen_check_sr(DisasContext *dc, uint32_t sr, unsigned access)
{
if (!xtensa_option_bits_enabled(dc->config, sregnames[sr].opt_bits)) {
if (sregnames[sr].name) {
qemu_log_mask(LOG_GUEST_ERROR, "SR %s is not configured\n", sregnames[sr].name);
} else {
qemu_log_mask(LOG_UNIMP, "SR %d is not implemented\n", sr);
}
gen_exception_cause(dc, ILLEGAL_INSTRUCTION_CAUSE);
return false;
} else if (!(sregnames[sr].access & access)) {
static const char * const access_text[] = {
[SR_R] = "rsr",
[SR_W] = "wsr",
[SR_X] = "xsr",
};
assert(access < ARRAY_SIZE(access_text) && access_text[access]);
qemu_log_mask(LOG_GUEST_ERROR, "SR %s is not available for %s\n", sregnames[sr].name,
access_text[access]);
gen_exception_cause(dc, ILLEGAL_INSTRUCTION_CAUSE);
return false;
}
return true;
}
static bool gen_rsr_ccount(DisasContext *dc, TCGv_i32 d, uint32_t sr)
{
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_update_ccount(cpu_env);
tcg_gen_mov_i32(d, cpu_SR[sr]);
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_end();
return true;
}
return false;
}
static bool gen_rsr_ptevaddr(DisasContext *dc, TCGv_i32 d, uint32_t sr)
{
tcg_gen_shri_i32(d, cpu_SR[EXCVADDR], 10);
tcg_gen_or_i32(d, d, cpu_SR[sr]);
tcg_gen_andi_i32(d, d, 0xfffffffc);
return false;
}
static bool gen_rsr(DisasContext *dc, TCGv_i32 d, uint32_t sr)
{
static bool (* const rsr_handler[256])(DisasContext *dc,
TCGv_i32 d, uint32_t sr) = {
[CCOUNT] = gen_rsr_ccount,
[INTSET] = gen_rsr_ccount,
[PTEVADDR] = gen_rsr_ptevaddr,
};
if (rsr_handler[sr]) {
return rsr_handler[sr](dc, d, sr);
} else {
tcg_gen_mov_i32(d, cpu_SR[sr]);
return false;
}
}
static bool gen_wsr_lbeg(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
gen_helper_wsr_lbeg(cpu_env, s);
gen_jumpi_check_loop_end(dc, 0);
return false;
}
static bool gen_wsr_lend(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
gen_helper_wsr_lend(cpu_env, s);
gen_jumpi_check_loop_end(dc, 0);
return false;
}
static bool gen_wsr_sar(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
tcg_gen_andi_i32(cpu_SR[sr], s, 0x3f);
if (dc->sar_m32_5bit) {
tcg_gen_discard_i32(dc->sar_m32);
}
dc->sar_5bit = false;
dc->sar_m32_5bit = false;
return false;
}
static bool gen_wsr_br(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
tcg_gen_andi_i32(cpu_SR[sr], s, 0xffff);
return false;
}
static bool gen_wsr_litbase(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
tcg_gen_andi_i32(cpu_SR[sr], s, 0xfffff001);
/* This can change tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
return true;
}
static bool gen_wsr_acchi(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
tcg_gen_ext8s_i32(cpu_SR[sr], s);
return false;
}
static bool gen_wsr_windowbase(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
gen_helper_wsr_windowbase(cpu_env, v);
/* This can change tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
return true;
}
static bool gen_wsr_windowstart(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v, (1 << dc->config->nareg / 4) - 1);
/* This can change tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
return true;
}
static bool gen_wsr_ptevaddr(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v, 0xffc00000);
return false;
}
static bool gen_wsr_rasid(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
gen_helper_wsr_rasid(cpu_env, v);
/* This can change tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
return true;
}
static bool gen_wsr_tlbcfg(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v, 0x01130000);
return false;
}
static bool gen_wsr_ibreakenable(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
gen_helper_wsr_ibreakenable(cpu_env, v);
gen_jumpi_check_loop_end(dc, 0);
return true;
}
static bool gen_wsr_memctl(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
gen_helper_wsr_memctl(cpu_env, v);
return false;
}
static bool gen_wsr_atomctl(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v, 0x3f);
return false;
}
static bool gen_wsr_ibreaka(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
unsigned id = sr - IBREAKA;
if (id < dc->config->nibreak) {
TCGv_i32 tmp = tcg_const_i32(id);
gen_helper_wsr_ibreaka(cpu_env, tmp, v);
tcg_temp_free(tmp);
gen_jumpi_check_loop_end(dc, 0);
return true;
}
return false;
}
static bool gen_wsr_dbreaka(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
unsigned id = sr - DBREAKA;
if (id < dc->config->ndbreak) {
TCGv_i32 tmp = tcg_const_i32(id);
gen_helper_wsr_dbreaka(cpu_env, tmp, v);
tcg_temp_free(tmp);
}
return false;
}
static bool gen_wsr_dbreakc(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
unsigned id = sr - DBREAKC;
if (id < dc->config->ndbreak) {
TCGv_i32 tmp = tcg_const_i32(id);
gen_helper_wsr_dbreakc(cpu_env, tmp, v);
tcg_temp_free(tmp);
}
return false;
}
static bool gen_wsr_cpenable(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v, 0xff);
/* This can change tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
return true;
}
static void gen_check_interrupts(DisasContext *dc)
{
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_check_interrupts(cpu_env);
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_end();
}
}
static bool gen_wsr_intset(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v,
dc->config->inttype_mask[INTTYPE_SOFTWARE]);
gen_check_interrupts(dc);
gen_jumpi_check_loop_end(dc, 0);
return true;
}
static bool gen_wsr_intclear(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_andi_i32(tmp, v,
dc->config->inttype_mask[INTTYPE_EDGE] |
dc->config->inttype_mask[INTTYPE_NMI] |
dc->config->inttype_mask[INTTYPE_SOFTWARE]);
tcg_gen_andc_i32(cpu_SR[INTSET], cpu_SR[INTSET], tmp);
tcg_temp_free(tmp);
gen_check_interrupts(dc);
gen_jumpi_check_loop_end(dc, 0);
return true;
}
static bool gen_wsr_intenable(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_mov_i32(cpu_SR[sr], v);
gen_check_interrupts(dc);
gen_jumpi_check_loop_end(dc, 0);
return true;
}
static bool gen_wsr_ps(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
uint32_t mask = PS_WOE | PS_CALLINC | PS_OWB |
PS_UM | PS_EXCM | PS_INTLEVEL;
if (option_enabled(dc, XTENSA_OPTION_MMU)) {
mask |= PS_RING;
}
tcg_gen_andi_i32(cpu_SR[sr], v, mask);
gen_check_interrupts(dc);
/* This can change mmu index and tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
return true;
}
static bool gen_wsr_ccount(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_wsr_ccount(cpu_env, v);
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_end();
gen_jumpi_check_loop_end(dc, 0);
return true;
}
return false;
}
static bool gen_wsr_icount(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
if (dc->icount) {
tcg_gen_mov_i32(dc->next_icount, v);
} else {
tcg_gen_mov_i32(cpu_SR[sr], v);
}
return false;
}
static bool gen_wsr_icountlevel(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v, 0xf);
/* This can change tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
return true;
}
static bool gen_wsr_ccompare(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
uint32_t id = sr - CCOMPARE;
bool ret = false;
if (id < dc->config->nccompare) {
uint32_t int_bit = 1 << dc->config->timerint[id];
TCGv_i32 tmp = tcg_const_i32(id);
tcg_gen_mov_i32(cpu_SR[sr], v);
tcg_gen_andi_i32(cpu_SR[INTSET], cpu_SR[INTSET], ~int_bit);
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_update_ccompare(cpu_env, tmp);
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_end();
gen_jumpi_check_loop_end(dc, 0);
ret = true;
}
tcg_temp_free(tmp);
}
return ret;
}
static bool gen_wsr(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
static bool (* const wsr_handler[256])(DisasContext *dc,
uint32_t sr, TCGv_i32 v) = {
[LBEG] = gen_wsr_lbeg,
[LEND] = gen_wsr_lend,
[SAR] = gen_wsr_sar,
[BR] = gen_wsr_br,
[LITBASE] = gen_wsr_litbase,
[ACCHI] = gen_wsr_acchi,
[WINDOW_BASE] = gen_wsr_windowbase,
[WINDOW_START] = gen_wsr_windowstart,
[PTEVADDR] = gen_wsr_ptevaddr,
[RASID] = gen_wsr_rasid,
[ITLBCFG] = gen_wsr_tlbcfg,
[DTLBCFG] = gen_wsr_tlbcfg,
[IBREAKENABLE] = gen_wsr_ibreakenable,
[MEMCTL] = gen_wsr_memctl,
[ATOMCTL] = gen_wsr_atomctl,
[IBREAKA] = gen_wsr_ibreaka,
[IBREAKA + 1] = gen_wsr_ibreaka,
[DBREAKA] = gen_wsr_dbreaka,
[DBREAKA + 1] = gen_wsr_dbreaka,
[DBREAKC] = gen_wsr_dbreakc,
[DBREAKC + 1] = gen_wsr_dbreakc,
[CPENABLE] = gen_wsr_cpenable,
[INTSET] = gen_wsr_intset,
[INTCLEAR] = gen_wsr_intclear,
[INTENABLE] = gen_wsr_intenable,
[PS] = gen_wsr_ps,
[CCOUNT] = gen_wsr_ccount,
[ICOUNT] = gen_wsr_icount,
[ICOUNTLEVEL] = gen_wsr_icountlevel,
[CCOMPARE] = gen_wsr_ccompare,
[CCOMPARE + 1] = gen_wsr_ccompare,
[CCOMPARE + 2] = gen_wsr_ccompare,
};
if (wsr_handler[sr]) {
return wsr_handler[sr](dc, sr, s);
} else {
tcg_gen_mov_i32(cpu_SR[sr], s);
return false;
}
}
static void gen_wur(uint32_t ur, TCGv_i32 s)
{
switch (ur) {
case FCR:
gen_helper_wur_fcr(cpu_env, s);
break;
case FSR:
tcg_gen_andi_i32(cpu_UR[ur], s, 0xffffff80);
break;
default:
tcg_gen_mov_i32(cpu_UR[ur], s);
break;
}
}
static void gen_load_store_alignment(DisasContext *dc, int shift,
TCGv_i32 addr, bool no_hw_alignment)
{
if (!option_enabled(dc, XTENSA_OPTION_UNALIGNED_EXCEPTION)) {
tcg_gen_andi_i32(addr, addr, ~0 << shift);
} else if (option_enabled(dc, XTENSA_OPTION_HW_ALIGNMENT) &&
no_hw_alignment) {
TCGLabel *label = gen_new_label();
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_andi_i32(tmp, addr, ~(~0 << shift));
tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, label);
gen_exception_cause_vaddr(dc, LOAD_STORE_ALIGNMENT_CAUSE, addr);
gen_set_label(label);
tcg_temp_free(tmp);
}
}
static void gen_waiti(DisasContext *dc, uint32_t imm4)
{
TCGv_i32 pc = tcg_const_i32(dc->next_pc);
TCGv_i32 intlevel = tcg_const_i32(imm4);
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_waiti(cpu_env, pc, intlevel);
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_end();
}
tcg_temp_free(pc);
tcg_temp_free(intlevel);
gen_jumpi_check_loop_end(dc, 0);
}
static bool gen_window_check1(DisasContext *dc, unsigned r1)
{
if (r1 / 4 > dc->window) {
TCGv_i32 pc = tcg_const_i32(dc->pc);
TCGv_i32 w = tcg_const_i32(r1 / 4);
gen_helper_window_check(cpu_env, pc, w);
dc->is_jmp = DISAS_UPDATE;
return false;
}
return true;
}
static bool gen_window_check2(DisasContext *dc, unsigned r1, unsigned r2)
{
return gen_window_check1(dc, r1 > r2 ? r1 : r2);
}
static bool gen_window_check3(DisasContext *dc, unsigned r1, unsigned r2,
unsigned r3)
{
return gen_window_check2(dc, r1, r2 > r3 ? r2 : r3);
}
static TCGv_i32 gen_mac16_m(TCGv_i32 v, bool hi, bool is_unsigned)
{
TCGv_i32 m = tcg_temp_new_i32();
if (hi) {
(is_unsigned ? tcg_gen_shri_i32 : tcg_gen_sari_i32)(m, v, 16);
} else {
(is_unsigned ? tcg_gen_ext16u_i32 : tcg_gen_ext16s_i32)(m, v);
}
return m;
}
static inline unsigned xtensa_op0_insn_len(unsigned op0)
{
return op0 >= 8 ? 2 : 3;
}
static void disas_xtensa_insn(CPUXtensaState *env, DisasContext *dc)
{
#define HAS_OPTION_BITS(opt) do { \
if (!option_bits_enabled(dc, opt)) { \
qemu_log_mask(LOG_GUEST_ERROR, "Option is not enabled %s:%d\n", \
__FILE__, __LINE__); \
goto invalid_opcode; \
} \
} while (0)
#define HAS_OPTION(opt) HAS_OPTION_BITS(XTENSA_OPTION_BIT(opt))
#define TBD() qemu_log_mask(LOG_UNIMP, "TBD(pc = %08x): %s:%d\n", dc->pc, __FILE__, __LINE__)
#define RESERVED() do { \
qemu_log_mask(LOG_GUEST_ERROR, "RESERVED(pc = %08x, %02x%02x%02x): %s:%d\n", \
dc->pc, b0, b1, b2, __FILE__, __LINE__); \
goto invalid_opcode; \
} while (0)
#ifdef TARGET_WORDS_BIGENDIAN
#define OP0 (((b0) & 0xf0) >> 4)
#define OP1 (((b2) & 0xf0) >> 4)
#define OP2 ((b2) & 0xf)
#define RRR_R ((b1) & 0xf)
#define RRR_S (((b1) & 0xf0) >> 4)
#define RRR_T ((b0) & 0xf)
#else
#define OP0 (((b0) & 0xf))
#define OP1 (((b2) & 0xf))
#define OP2 (((b2) & 0xf0) >> 4)
#define RRR_R (((b1) & 0xf0) >> 4)
#define RRR_S (((b1) & 0xf))
#define RRR_T (((b0) & 0xf0) >> 4)
#endif
#define RRR_X ((RRR_R & 0x4) >> 2)
#define RRR_Y ((RRR_T & 0x4) >> 2)
#define RRR_W (RRR_R & 0x3)
#define RRRN_R RRR_R
#define RRRN_S RRR_S
#define RRRN_T RRR_T
#define RRI4_R RRR_R
#define RRI4_S RRR_S
#define RRI4_T RRR_T
#ifdef TARGET_WORDS_BIGENDIAN
#define RRI4_IMM4 ((b2) & 0xf)
#else