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 <jcmvb...@gmail.com>
---
target-xtensa/cpu.h | 60 +++++++
target-xtensa/helper.c | 27 +++-
target-xtensa/helpers.h | 5 +
target-xtensa/op_helper.c | 7 +
target-xtensa/translate.c | 374 +++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 471 insertions(+), 2 deletions(-)
create mode 100644 target-xtensa/helpers.h
diff --git a/target-xtensa/cpu.h b/target-xtensa/cpu.h
index ef6881a..cf19fce 100644
--- a/target-xtensa/cpu.h
+++ b/target-xtensa/cpu.h
@@ -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_OPTIN_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];
diff --git a/target-xtensa/helper.c b/target-xtensa/helper.c
index 6b6e17b..6f374d3 100644
--- a/target-xtensa/helper.c
+++ b/target-xtensa/helper.c
@@ -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 = qemu_mallocz(sizeof(*env));
+ env->config = config;
cpu_exec_init(env);
if (!tcg_inited) {
@@ -60,8 +80,11 @@ 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)
diff --git a/target-xtensa/helpers.h b/target-xtensa/helpers.h
new file mode 100644
index 0000000..c298d74
--- /dev/null
+++ b/target-xtensa/helpers.h
@@ -0,0 +1,5 @@
+#include "def-helper.h"
+
+DEF_HELPER_1(exception, void, i32)
+
+#include "def-helper.h"
diff --git a/target-xtensa/op_helper.c b/target-xtensa/op_helper.c
index 5a0e068..d1e620c 100644
--- a/target-xtensa/op_helper.c
+++ b/target-xtensa/op_helper.c
@@ -26,6 +26,7 @@
*/
#include "exec.h"
+#include "helpers.h"
#define MMUSUFFIX _mmu
@@ -49,3 +50,9 @@ 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();
+}
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index c47feab..16efcfd 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -36,17 +36,391 @@
#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;
+ 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]);
+ }
+}
+
+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(DisasContext *dc, TCGv dest)
+{
+ tcg_gen_mov_i32(cpu_pc, dest);
+ if (dc->singlestep_enabled) {
+ gen_exception(EXCP_DEBUG);
+ }
+ tcg_gen_exit_tb(0);
+ dc->is_jmp = DISAS_UPDATE;
+}
+
+static void gen_jumpi(DisasContext *dc, uint32_t dest)
+{
+ TCGv_i32 tmp = tcg_const_i32(dest);
+ gen_jump(dc, tmp);
+ tcg_temp_free(tmp);
+}
+
+static void disas_xtensa_insn(DisasContext *dc)
+{
+#define HAS_OPTION(opt) do { \
+ if (!(dc->config->options & (((uint64_t)1) << (opt)))) { \
+ goto invalid_opcode; \
+ } \
+ } while (0)
+
+#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)
+
+#define RRRN_R RRR_R
+#define RRRN_S RRR_S
+#define RRRN_T RRR_T
+
+#define RI16_IMM16 (((_b1) << 8) | (_b2))
+
+#define CALL_N (((_b0) & 0xc) >> 2)
+#define CALL_OFFSET ((((_b0) & 0x3) << 16) | ((_b1) << 8) | (_b2))
+#define CALL_OFFSET_SE (((_b0 & 0x2) ? 0xfffc0000 : 0) | CALL_OFFSET)
+
+ uint8_t _b0 = ldub_code(dc->pc);
+ uint8_t _b1 = ldub_code(dc->pc + 1);
+ uint8_t _b2 = ldub_code(dc->pc + 2);
+
+ 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->pc + 3);
+ gen_jumpi(dc, (dc->pc & ~3) + (CALL_OFFSET_SE << 2) + 4);
+ 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);
+ 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;
+ }
+
+ if (_OP0 >= 8) {
+ dc->pc += 2;
+ HAS_OPTION(XTENSA_OPTION_CODE_DENSITY);
+ } else {
+ dc->pc += 3;
+ }
+ return;
+
+invalid_opcode:
+ printf("INVALID(pc = %08x): %s:%d\n", dc->pc, __FILE__, __LINE__);
+ dc->pc += (_OP0 >= 8) ? 2 : 3;
+#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;
+
+ if (max_insns == 0) {
+ max_insns = CF_COUNT_MASK;
+ }
+
+ dc.config = env->config;
+ dc.singlestep_enabled = env->singlestep_enabled;
+ dc.tb = tb;
+ dc.pc = env->pc;
+ 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 &&
+ gen_opc_ptr < gen_opc_end);
+
+ if (dc.is_jmp == DISAS_NEXT) {
+ tcg_gen_movi_i32(cpu_pc, dc.pc);
+ tcg_gen_exit_tb(0);
+ }
+ gen_icount_end(tb, insn_count);
+ *gen_opc_ptr = INDEX_op_end;
+
}
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,
--
1.7.3.4
