*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
*/
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
-#include <assert.h>
#define DEBUG_DISAS
#define SH4_DEBUG_DISAS
int memidx;
uint32_t delayed_pc;
int singlestep_enabled;
+ uint32_t features;
+ int has_movcal;
} DisasContext;
#if defined(CONFIG_USER_ONLY)
static TCGv cpu_gregs[24];
static TCGv cpu_pc, cpu_sr, cpu_ssr, cpu_spc, cpu_gbr;
static TCGv cpu_vbr, cpu_sgr, cpu_dbr, cpu_mach, cpu_macl;
-static TCGv cpu_pr, cpu_fpscr, cpu_fpul;
+static TCGv cpu_pr, cpu_fpscr, cpu_fpul, cpu_ldst;
static TCGv cpu_fregs[32];
/* internal register indexes */
cpu_delayed_pc = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUState, delayed_pc),
"_delayed_pc_");
+ cpu_ldst = tcg_global_mem_new_i32(TCG_AREG0,
+ offsetof(CPUState, ldst), "_ldst_");
for (i = 0; i < 32; i++)
cpu_fregs[i] = tcg_global_mem_new_i32(TCG_AREG0,
static void cpu_sh4_reset(CPUSH4State * env)
{
+ if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+ qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
+ log_cpu_state(env, 0);
+ }
+
#if defined(CONFIG_USER_ONLY)
- env->sr = SR_FD; /* FD - kernel does lazy fpu context switch */
+ env->sr = 0;
#else
- env->sr = 0x700000F0; /* MD, RB, BL, I3-I0 */
+ env->sr = SR_MD | SR_RB | SR_BL | SR_I3 | SR_I2 | SR_I1 | SR_I0;
#endif
env->vbr = 0;
env->pc = 0xA0000000;
uint32_t pvr;
uint32_t prr;
uint32_t cvr;
+ uint32_t features;
} sh4_def_t;
static sh4_def_t sh4_defs[] = {
.pvr = 0x00050000,
.prr = 0x00000100,
.cvr = 0x00110000,
+ .features = SH_FEATURE_BCR3_AND_BCR4,
}, {
.name = "SH7751R",
.id = SH_CPU_SH7751R,
.pvr = 0x04050005,
.prr = 0x00000113,
.cvr = 0x00110000, /* Neutered caches, should be 0x20480000 */
+ .features = SH_FEATURE_BCR3_AND_BCR4,
}, {
.name = "SH7785",
.id = SH_CPU_SH7785,
.pvr = 0x10300700,
.prr = 0x00000200,
.cvr = 0x71440211,
+ .features = SH_FEATURE_SH4A,
},
};
if (strcasecmp(name, "any") == 0)
return &sh4_defs[0];
- for (i = 0; i < sizeof(sh4_defs) / sizeof(*sh4_defs); i++)
+ for (i = 0; i < ARRAY_SIZE(sh4_defs); i++)
if (strcasecmp(name, sh4_defs[i].name) == 0)
return &sh4_defs[i];
{
int i;
- for (i = 0; i < sizeof(sh4_defs) / sizeof(*sh4_defs); i++)
+ for (i = 0; i < ARRAY_SIZE(sh4_defs); i++)
(*cpu_fprintf)(f, "%s\n", sh4_defs[i].name);
}
if (!def)
return NULL;
env = qemu_mallocz(sizeof(CPUSH4State));
- if (!env)
- return NULL;
+ env->features = def->features;
cpu_exec_init(env);
+ env->movcal_backup_tail = &(env->movcal_backup);
sh4_translate_init();
env->cpu_model_str = cpu_model;
cpu_sh4_reset(env);
cpu_sh4_register(env, def);
tlb_flush(env, 1);
+ qemu_init_vcpu(env);
return env;
}
static void _decode_opc(DisasContext * ctx)
{
+ /* This code tries to make movcal emulation sufficiently
+ accurate for Linux purposes. This instruction writes
+ memory, and prior to that, always allocates a cache line.
+ It is used in two contexts:
+ - in memcpy, where data is copied in blocks, the first write
+ of to a block uses movca.l for performance.
+ - in arch/sh/mm/cache-sh4.c, movcal.l + ocbi combination is used
+ to flush the cache. Here, the data written by movcal.l is never
+ written to memory, and the data written is just bogus.
+
+ To simulate this, we simulate movcal.l, we store the value to memory,
+ but we also remember the previous content. If we see ocbi, we check
+ if movcal.l for that address was done previously. If so, the write should
+ not have hit the memory, so we restore the previous content.
+ When we see an instruction that is neither movca.l
+ nor ocbi, the previous content is discarded.
+
+ To optimize, we only try to flush stores when we're at the start of
+ TB, or if we already saw movca.l in this TB and did not flush stores
+ yet. */
+ if (ctx->has_movcal)
+ {
+ int opcode = ctx->opcode & 0xf0ff;
+ if (opcode != 0x0093 /* ocbi */
+ && opcode != 0x00c3 /* movca.l */)
+ {
+ gen_helper_discard_movcal_backup ();
+ ctx->has_movcal = 0;
+ }
+ }
+
#if 0
fprintf(stderr, "Translating opcode 0x%04x\n", ctx->opcode);
#endif
{
int label1 = gen_new_label();
int label2 = gen_new_label();
- TCGv cmp1 = tcg_temp_local_new(TCG_TYPE_I32);
- TCGv cmp2 = tcg_temp_local_new(TCG_TYPE_I32);
+ TCGv cmp1 = tcg_temp_local_new();
+ TCGv cmp2 = tcg_temp_local_new();
tcg_gen_xor_i32(cmp1, REG(B7_4), REG(B11_8));
tcg_gen_andi_i32(cmp2, cmp1, 0xff000000);
tcg_gen_brcondi_i32(TCG_COND_EQ, cmp2, 0, label1);
int label2 = gen_new_label();
int label3 = gen_new_label();
int label4 = gen_new_label();
- TCGv shift = tcg_temp_local_new(TCG_TYPE_I32);
+ TCGv shift = tcg_temp_local_new();
tcg_gen_brcondi_i32(TCG_COND_LT, REG(B7_4), 0, label1);
/* Rm positive, shift to the left */
tcg_gen_andi_i32(shift, REG(B7_4), 0x1f);
int label1 = gen_new_label();
int label2 = gen_new_label();
int label3 = gen_new_label();
- TCGv shift = tcg_temp_local_new(TCG_TYPE_I32);
+ TCGv shift = tcg_temp_local_new();
tcg_gen_brcondi_i32(TCG_COND_LT, REG(B7_4), 0, label1);
/* Rm positive, shift to the left */
tcg_gen_andi_i32(shift, REG(B7_4), 0x1f);
}
}
return;
+ case 0xf00e: /* fmac FR0,RM,Rn */
+ {
+ CHECK_FPU_ENABLED
+ if (ctx->fpscr & FPSCR_PR) {
+ break; /* illegal instruction */
+ } else {
+ gen_helper_fmac_FT(cpu_fregs[FREG(B11_8)],
+ cpu_fregs[FREG(0)], cpu_fregs[FREG(B7_4)], cpu_fregs[FREG(B11_8)]);
+ return;
+ }
+ }
}
switch (ctx->opcode & 0xff00) {
}
return;
case 0x00c3: /* movca.l R0,@Rm */
- tcg_gen_qemu_st32(REG(0), REG(B11_8), ctx->memidx);
+ {
+ TCGv val = tcg_temp_new();
+ tcg_gen_qemu_ld32u(val, REG(B11_8), ctx->memidx);
+ gen_helper_movcal (REG(B11_8), val);
+ tcg_gen_qemu_st32(REG(0), REG(B11_8), ctx->memidx);
+ }
+ ctx->has_movcal = 1;
return;
case 0x40a9:
/* MOVUA.L @Rm,R0 (Rm) -> R0
case 0x0029: /* movt Rn */
tcg_gen_andi_i32(REG(B11_8), cpu_sr, SR_T);
return;
+ case 0x0073:
+ /* MOVCO.L
+ LDST -> T
+ If (T == 1) R0 -> (Rn)
+ 0 -> LDST
+ */
+ if (ctx->features & SH_FEATURE_SH4A) {
+ int label = gen_new_label();
+ gen_clr_t();
+ tcg_gen_or_i32(cpu_sr, cpu_sr, cpu_ldst);
+ tcg_gen_brcondi_i32(TCG_COND_EQ, cpu_ldst, 0, label);
+ tcg_gen_qemu_st32(REG(0), REG(B11_8), ctx->memidx);
+ gen_set_label(label);
+ tcg_gen_movi_i32(cpu_ldst, 0);
+ return;
+ } else
+ break;
+ case 0x0063:
+ /* MOVLI.L @Rm,R0
+ 1 -> LDST
+ (Rm) -> R0
+ When interrupt/exception
+ occurred 0 -> LDST
+ */
+ if (ctx->features & SH_FEATURE_SH4A) {
+ tcg_gen_movi_i32(cpu_ldst, 0);
+ tcg_gen_qemu_ld32s(REG(0), REG(B11_8), ctx->memidx);
+ tcg_gen_movi_i32(cpu_ldst, 1);
+ return;
+ } else
+ break;
case 0x0093: /* ocbi @Rn */
{
- TCGv dummy = tcg_temp_new();
- tcg_gen_qemu_ld32s(dummy, REG(B11_8), ctx->memidx);
- tcg_temp_free(dummy);
+ gen_helper_ocbi (REG(B11_8));
}
return;
case 0x00a3: /* ocbp @Rn */
return;
case 0x0083: /* pref @Rn */
return;
+ case 0x00d3: /* prefi @Rn */
+ if (ctx->features & SH_FEATURE_SH4A)
+ return;
+ else
+ break;
+ case 0x00e3: /* icbi @Rn */
+ if (ctx->features & SH_FEATURE_SH4A)
+ return;
+ else
+ break;
+ case 0x00ab: /* synco */
+ if (ctx->features & SH_FEATURE_SH4A)
+ return;
+ else
+ break;
case 0x4024: /* rotcl Rn */
{
TCGv tmp = tcg_temp_new();
case 0x401b: /* tas.b @Rn */
{
TCGv addr, val;
- addr = tcg_temp_local_new(TCG_TYPE_I32);
+ addr = tcg_temp_local_new();
tcg_gen_mov_i32(addr, REG(B11_8));
- val = tcg_temp_local_new(TCG_TYPE_I32);
+ val = tcg_temp_local_new();
tcg_gen_qemu_ld8u(val, addr, ctx->memidx);
gen_cmp_imm(TCG_COND_EQ, val, 0);
tcg_gen_ori_i32(val, val, 0x80);
}
return;
}
-
+#if 0
fprintf(stderr, "unknown instruction 0x%04x at pc 0x%08x\n",
ctx->opcode, ctx->pc);
+ fflush(stderr);
+#endif
gen_helper_raise_illegal_instruction();
ctx->bstate = BS_EXCP;
}
ctx.delayed_pc = -1; /* use delayed pc from env pointer */
ctx.tb = tb;
ctx.singlestep_enabled = env->singlestep_enabled;
+ ctx.features = env->features;
+ ctx.has_movcal = (tb->flags & TB_FLAG_PENDING_MOVCA);
#ifdef DEBUG_DISAS
- if (loglevel & CPU_LOG_TB_CPU) {
- fprintf(logfile,
- "------------------------------------------------\n");
- cpu_dump_state(env, logfile, fprintf, 0);
- }
+ qemu_log_mask(CPU_LOG_TB_CPU,
+ "------------------------------------------------\n");
+ log_cpu_state_mask(CPU_LOG_TB_CPU, env, 0);
#endif
ii = -1;
break;
if (num_insns >= max_insns)
break;
-#ifdef SH4_SINGLE_STEP
- break;
-#endif
+ if (singlestep)
+ break;
}
if (tb->cflags & CF_LAST_IO)
gen_io_end();
#ifdef DEBUG_DISAS
#ifdef SH4_DEBUG_DISAS
- if (loglevel & CPU_LOG_TB_IN_ASM)
- fprintf(logfile, "\n");
+ qemu_log_mask(CPU_LOG_TB_IN_ASM, "\n");
#endif
- if (loglevel & CPU_LOG_TB_IN_ASM) {
- fprintf(logfile, "IN:\n"); /* , lookup_symbol(pc_start)); */
- target_disas(logfile, pc_start, ctx.pc - pc_start, 0);
- fprintf(logfile, "\n");
+ if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
+ qemu_log("IN:\n"); /* , lookup_symbol(pc_start)); */
+ log_target_disas(pc_start, ctx.pc - pc_start, 0);
+ qemu_log("\n");
}
#endif
}
projects / qemu / blobdiff