target-xtensa: implement disas_xtensa_insn

Set up disas_xtensa_insn switch structure, mark required options on high
level groups. Implement arithmetic/bit logic/jump/call0.

Implement code generation loop with single step/breakpoint checking.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Max Filippov 2011-09-06 03:55:27 +04:00 committed by Blue Swirl
parent cfa550c6ac
commit dedc5eae23
5 changed files with 556 additions and 2 deletions

View File

@ -45,7 +45,67 @@
#define TARGET_VIRT_ADDR_SPACE_BITS 32
#define TARGET_PAGE_BITS 12
enum {
/* Additional instructions */
XTENSA_OPTION_CODE_DENSITY,
XTENSA_OPTION_LOOP,
XTENSA_OPTION_EXTENDED_L32R,
XTENSA_OPTION_16_BIT_IMUL,
XTENSA_OPTION_32_BIT_IMUL,
XTENSA_OPTION_32_BIT_IDIV,
XTENSA_OPTION_MAC16,
XTENSA_OPTION_MISC_OP,
XTENSA_OPTION_COPROCESSOR,
XTENSA_OPTION_BOOLEAN,
XTENSA_OPTION_FP_COPROCESSOR,
XTENSA_OPTION_MP_SYNCHRO,
XTENSA_OPTION_CONDITIONAL_STORE,
/* Interrupts and exceptions */
XTENSA_OPTION_EXCEPTION,
XTENSA_OPTION_RELOCATABLE_VECTOR,
XTENSA_OPTION_UNALIGNED_EXCEPTION,
XTENSA_OPTION_INTERRUPT,
XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT,
XTENSA_OPTION_TIMER_INTERRUPT,
/* Local memory */
XTENSA_OPTION_ICACHE,
XTENSA_OPTION_ICACHE_TEST,
XTENSA_OPTION_ICACHE_INDEX_LOCK,
XTENSA_OPTION_DCACHE,
XTENSA_OPTION_DCACHE_TEST,
XTENSA_OPTION_DCACHE_INDEX_LOCK,
XTENSA_OPTION_IRAM,
XTENSA_OPTION_IROM,
XTENSA_OPTION_DRAM,
XTENSA_OPTION_DROM,
XTENSA_OPTION_XLMI,
XTENSA_OPTION_HW_ALIGNMENT,
XTENSA_OPTION_MEMORY_ECC_PARITY,
/* Memory protection and translation */
XTENSA_OPTION_REGION_PROTECTION,
XTENSA_OPTION_REGION_TRANSLATION,
XTENSA_OPTION_MMU,
/* Other */
XTENSA_OPTION_WINDOWED_REGISTER,
XTENSA_OPTION_PROCESSOR_INTERFACE,
XTENSA_OPTION_MISC_SR,
XTENSA_OPTION_THREAD_POINTER,
XTENSA_OPTION_PROCESSOR_ID,
XTENSA_OPTION_DEBUG,
XTENSA_OPTION_TRACE_PORT,
};
typedef struct XtensaConfig {
const char *name;
uint64_t options;
} XtensaConfig;
typedef struct CPUXtensaState {
const XtensaConfig *config;
uint32_t regs[16];
uint32_t pc;
uint32_t sregs[256];
@ -66,6 +126,13 @@ void do_interrupt(CPUXtensaState *s);
int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
#define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
{
return (config->options & XTENSA_OPTION_BIT(opt)) != 0;
}
static inline int cpu_mmu_index(CPUState *env)
{
return 0;

View File

@ -39,12 +39,32 @@ void cpu_reset(CPUXtensaState *env)
env->pc = 0;
}
static const XtensaConfig core_config[] = {
{
.name = "sample-xtensa-core",
.options = -1,
},
};
CPUXtensaState *cpu_xtensa_init(const char *cpu_model)
{
static int tcg_inited;
CPUXtensaState *env;
const XtensaConfig *config = NULL;
int i;
for (i = 0; i < ARRAY_SIZE(core_config); ++i)
if (strcmp(core_config[i].name, cpu_model) == 0) {
config = core_config + i;
break;
}
if (config == NULL) {
return NULL;
}
env = g_malloc0(sizeof(*env));
env->config = config;
cpu_exec_init(env);
if (!tcg_inited) {
@ -59,8 +79,11 @@ CPUXtensaState *cpu_xtensa_init(const char *cpu_model)
void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf)
{
cpu_fprintf(f, "Available CPUs:\n"
" Xtensa core\n");
int i;
cpu_fprintf(f, "Available CPUs:\n");
for (i = 0; i < ARRAY_SIZE(core_config); ++i) {
cpu_fprintf(f, " %s\n", core_config[i].name);
}
}
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)

5
target-xtensa/helpers.h Normal file
View File

@ -0,0 +1,5 @@
#include "def-helper.h"
DEF_HELPER_1(exception, void, i32)
#include "def-helper.h"

View File

@ -27,6 +27,7 @@
#include "cpu.h"
#include "dyngen-exec.h"
#include "helpers.h"
#define MMUSUFFIX _mmu
@ -50,3 +51,9 @@ void tlb_fill(target_ulong addr, int is_write, int mmu_idx, void *retaddr)
PAGE_READ | PAGE_WRITE | PAGE_EXEC,
mmu_idx, TARGET_PAGE_SIZE);
}
void HELPER(exception)(uint32_t excp)
{
env->exception_index = excp;
cpu_loop_exit(env);
}

View File

@ -36,17 +36,469 @@
#include "tcg-op.h"
#include "qemu-log.h"
#include "helpers.h"
#define GEN_HELPER 1
#include "helpers.h"
typedef struct DisasContext {
const XtensaConfig *config;
TranslationBlock *tb;
uint32_t pc;
uint32_t next_pc;
int is_jmp;
int singlestep_enabled;
} DisasContext;
static TCGv_ptr cpu_env;
static TCGv_i32 cpu_pc;
static TCGv_i32 cpu_R[16];
#include "gen-icount.h"
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",
};
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
cpu_pc = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUState, pc), "pc");
for (i = 0; i < 16; i++) {
cpu_R[i] = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUState, regs[i]),
regnames[i]);
}
#define GEN_HELPER 2
#include "helpers.h"
}
static inline bool option_enabled(DisasContext *dc, int opt)
{
return xtensa_option_enabled(dc->config, opt);
}
static void gen_exception(int excp)
{
TCGv_i32 tmp = tcg_const_i32(excp);
gen_helper_exception(tmp);
tcg_temp_free(tmp);
}
static void gen_jump_slot(DisasContext *dc, TCGv dest, int slot)
{
tcg_gen_mov_i32(cpu_pc, dest);
if (dc->singlestep_enabled) {
gen_exception(EXCP_DEBUG);
} else {
if (slot >= 0) {
tcg_gen_goto_tb(slot);
tcg_gen_exit_tb((tcg_target_long)dc->tb + slot);
} else {
tcg_gen_exit_tb(0);
}
}
dc->is_jmp = DISAS_UPDATE;
}
static void gen_jumpi(DisasContext *dc, uint32_t dest, int slot)
{
TCGv_i32 tmp = tcg_const_i32(dest);
if (((dc->pc ^ dest) & TARGET_PAGE_MASK) != 0) {
slot = -1;
}
gen_jump_slot(dc, tmp, slot);
tcg_temp_free(tmp);
}
static void disas_xtensa_insn(DisasContext *dc)
{
#define HAS_OPTION(opt) do { \
if (!option_enabled(dc, opt)) { \
qemu_log("Option %d is not enabled %s:%d\n", \
(opt), __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 RRRN_R RRR_R
#define RRRN_S RRR_S
#define RRRN_T RRR_T
#define RRI8_R RRR_R
#define RRI8_S RRR_S
#define RRI8_T RRR_T
#define RRI8_IMM8 (b2)
#define RRI8_IMM8_SE ((((b2) & 0x80) ? 0xffffff00 : 0) | RRI8_IMM8)
#ifdef TARGET_WORDS_BIGENDIAN
#define RI16_IMM16 (((b1) << 8) | (b2))
#else
#define RI16_IMM16 (((b2) << 8) | (b1))
#endif
#ifdef TARGET_WORDS_BIGENDIAN
#define CALL_N (((b0) & 0xc) >> 2)
#define CALL_OFFSET ((((b0) & 0x3) << 16) | ((b1) << 8) | (b2))
#else
#define CALL_N (((b0) & 0x30) >> 4)
#define CALL_OFFSET ((((b0) & 0xc0) >> 6) | ((b1) << 2) | ((b2) << 10))
#endif
#define CALL_OFFSET_SE \
(((CALL_OFFSET & 0x20000) ? 0xfffc0000 : 0) | CALL_OFFSET)
#define CALLX_N CALL_N
#ifdef TARGET_WORDS_BIGENDIAN
#define CALLX_M ((b0) & 0x3)
#else
#define CALLX_M (((b0) & 0xc0) >> 6)
#endif
#define CALLX_S RRR_S
#define BRI12_M CALLX_M
#define BRI12_S RRR_S
#ifdef TARGET_WORDS_BIGENDIAN
#define BRI12_IMM12 ((((b1) & 0xf) << 8) | (b2))
#else
#define BRI12_IMM12 ((((b1) & 0xf0) >> 4) | ((b2) << 4))
#endif
#define BRI12_IMM12_SE (((BRI12_IMM12 & 0x800) ? 0xfffff000 : 0) | BRI12_IMM12)
#define BRI8_M BRI12_M
#define BRI8_R RRI8_R
#define BRI8_S RRI8_S
#define BRI8_IMM8 RRI8_IMM8
#define BRI8_IMM8_SE RRI8_IMM8_SE
#define RSR_SR (b1)
uint8_t b0 = ldub_code(dc->pc);
uint8_t b1 = ldub_code(dc->pc + 1);
uint8_t b2 = ldub_code(dc->pc + 2);
if (OP0 >= 8) {
dc->next_pc = dc->pc + 2;
HAS_OPTION(XTENSA_OPTION_CODE_DENSITY);
} else {
dc->next_pc = dc->pc + 3;
}
switch (OP0) {
case 0: /*QRST*/
switch (OP1) {
case 0: /*RST0*/
switch (OP2) {
case 0: /*ST0*/
if ((RRR_R & 0xc) == 0x8) {
HAS_OPTION(XTENSA_OPTION_BOOLEAN);
}
switch (RRR_R) {
case 0: /*SNM0*/
break;
case 1: /*MOVSPw*/
HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER);
break;
case 2: /*SYNC*/
break;
case 3:
break;
}
break;
case 1: /*AND*/
tcg_gen_and_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]);
break;
case 2: /*OR*/
tcg_gen_or_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]);
break;
case 3: /*XOR*/
tcg_gen_xor_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]);
break;
case 4: /*ST1*/
break;
case 5: /*TLB*/
break;
case 6: /*RT0*/
break;
case 7: /*reserved*/
break;
case 8: /*ADD*/
tcg_gen_add_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]);
break;
case 9: /*ADD**/
case 10:
case 11:
{
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_shli_i32(tmp, cpu_R[RRR_S], OP2 - 8);
tcg_gen_add_i32(cpu_R[RRR_R], tmp, cpu_R[RRR_T]);
tcg_temp_free(tmp);
}
break;
case 12: /*SUB*/
tcg_gen_sub_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]);
break;
case 13: /*SUB**/
case 14:
case 15:
{
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_shli_i32(tmp, cpu_R[RRR_S], OP2 - 12);
tcg_gen_sub_i32(cpu_R[RRR_R], tmp, cpu_R[RRR_T]);
tcg_temp_free(tmp);
}
break;
}
break;
case 1: /*RST1*/
break;
case 2: /*RST2*/
break;
case 3: /*RST3*/
break;
case 4: /*EXTUI*/
case 5:
break;
case 6: /*CUST0*/
break;
case 7: /*CUST1*/
break;
case 8: /*LSCXp*/
HAS_OPTION(XTENSA_OPTION_COPROCESSOR);
break;
case 9: /*LSC4*/
break;
case 10: /*FP0*/
HAS_OPTION(XTENSA_OPTION_FP_COPROCESSOR);
break;
case 11: /*FP1*/
HAS_OPTION(XTENSA_OPTION_FP_COPROCESSOR);
break;
default: /*reserved*/
break;
}
break;
case 1: /*L32R*/
{
TCGv_i32 tmp = tcg_const_i32(
(0xfffc0000 | (RI16_IMM16 << 2)) +
((dc->pc + 3) & ~3));
/* no ext L32R */
tcg_gen_qemu_ld32u(cpu_R[RRR_T], tmp, 0);
tcg_temp_free(tmp);
}
break;
case 2: /*LSAI*/
break;
case 3: /*LSCIp*/
HAS_OPTION(XTENSA_OPTION_COPROCESSOR);
break;
case 4: /*MAC16d*/
HAS_OPTION(XTENSA_OPTION_MAC16);
break;
case 5: /*CALLN*/
switch (CALL_N) {
case 0: /*CALL0*/
tcg_gen_movi_i32(cpu_R[0], dc->next_pc);
gen_jumpi(dc, (dc->pc & ~3) + (CALL_OFFSET_SE << 2) + 4, 0);
break;
case 1: /*CALL4w*/
case 2: /*CALL8w*/
case 3: /*CALL12w*/
HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER);
break;
}
break;
case 6: /*SI*/
switch (CALL_N) {
case 0: /*J*/
gen_jumpi(dc, dc->pc + 4 + CALL_OFFSET_SE, 0);
break;
}
break;
case 7: /*B*/
break;
case 8: /*L32I.Nn*/
break;
case 9: /*S32I.Nn*/
break;
case 10: /*ADD.Nn*/
break;
case 11: /*ADDI.Nn*/
break;
case 12: /*ST2n*/
break;
case 13: /*ST3n*/
break;
default: /*reserved*/
break;
}
dc->pc = dc->next_pc;
return;
invalid_opcode:
qemu_log("INVALID(pc = %08x)\n", dc->pc);
dc->pc = dc->next_pc;
#undef HAS_OPTION
}
static void check_breakpoint(CPUState *env, DisasContext *dc)
{
CPUBreakpoint *bp;
if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
if (bp->pc == dc->pc) {
tcg_gen_movi_i32(cpu_pc, dc->pc);
gen_exception(EXCP_DEBUG);
dc->is_jmp = DISAS_UPDATE;
}
}
}
}
static void gen_intermediate_code_internal(
CPUState *env, TranslationBlock *tb, int search_pc)
{
DisasContext dc;
int insn_count = 0;
int j, lj = -1;
uint16_t *gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
int max_insns = tb->cflags & CF_COUNT_MASK;
uint32_t pc_start = tb->pc;
uint32_t next_page_start =
(pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
if (max_insns == 0) {
max_insns = CF_COUNT_MASK;
}
dc.config = env->config;
dc.singlestep_enabled = env->singlestep_enabled;
dc.tb = tb;
dc.pc = pc_start;
dc.is_jmp = DISAS_NEXT;
gen_icount_start();
do {
check_breakpoint(env, &dc);
if (search_pc) {
j = gen_opc_ptr - gen_opc_buf;
if (lj < j) {
lj++;
while (lj < j) {
gen_opc_instr_start[lj++] = 0;
}
}
gen_opc_pc[lj] = dc.pc;
gen_opc_instr_start[lj] = 1;
gen_opc_icount[lj] = insn_count;
}
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) {
tcg_gen_debug_insn_start(dc.pc);
}
disas_xtensa_insn(&dc);
++insn_count;
if (env->singlestep_enabled) {
tcg_gen_movi_i32(cpu_pc, dc.pc);
gen_exception(EXCP_DEBUG);
break;
}
} while (dc.is_jmp == DISAS_NEXT &&
insn_count < max_insns &&
dc.pc < next_page_start &&
gen_opc_ptr < gen_opc_end);
if (dc.is_jmp == DISAS_NEXT) {
gen_jumpi(&dc, dc.pc, 0);
}
gen_icount_end(tb, insn_count);
*gen_opc_ptr = INDEX_op_end;
if (!search_pc) {
tb->size = dc.pc - pc_start;
tb->icount = insn_count;
}
}
void gen_intermediate_code(CPUState *env, TranslationBlock *tb)
{
gen_intermediate_code_internal(env, tb, 0);
}
void gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb)
{
gen_intermediate_code_internal(env, tb, 1);
}
void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf,