root / target-arm / helper.c @ ad69471c
History | View | Annotate | Download (67.4 kB)
| 1 |
#include <stdio.h> |
|---|---|
| 2 |
#include <stdlib.h> |
| 3 |
#include <string.h> |
| 4 |
|
| 5 |
#include "cpu.h" |
| 6 |
#include "exec-all.h" |
| 7 |
#include "gdbstub.h" |
| 8 |
#include "helpers.h" |
| 9 |
|
| 10 |
static uint32_t cortexa8_cp15_c0_c1[8] = |
| 11 |
{ 0x1031, 0x11, 0x400, 0, 0x31100003, 0x20000000, 0x01202000, 0x11 };
|
| 12 |
|
| 13 |
static uint32_t cortexa8_cp15_c0_c2[8] = |
| 14 |
{ 0x00101111, 0x12112111, 0x21232031, 0x11112131, 0x00111142, 0, 0, 0 };
|
| 15 |
|
| 16 |
static uint32_t mpcore_cp15_c0_c1[8] = |
| 17 |
{ 0x111, 0x1, 0, 0x2, 0x01100103, 0x10020302, 0x01222000, 0 };
|
| 18 |
|
| 19 |
static uint32_t mpcore_cp15_c0_c2[8] = |
| 20 |
{ 0x00100011, 0x12002111, 0x11221011, 0x01102131, 0x141, 0, 0, 0 };
|
| 21 |
|
| 22 |
static uint32_t arm1136_cp15_c0_c1[8] = |
| 23 |
{ 0x111, 0x1, 0x2, 0x3, 0x01130003, 0x10030302, 0x01222110, 0 };
|
| 24 |
|
| 25 |
static uint32_t arm1136_cp15_c0_c2[8] = |
| 26 |
{ 0x00140011, 0x12002111, 0x11231111, 0x01102131, 0x141, 0, 0, 0 };
|
| 27 |
|
| 28 |
static uint32_t cpu_arm_find_by_name(const char *name); |
| 29 |
|
| 30 |
static inline void set_feature(CPUARMState *env, int feature) |
| 31 |
{
|
| 32 |
env->features |= 1u << feature;
|
| 33 |
} |
| 34 |
|
| 35 |
static void cpu_reset_model_id(CPUARMState *env, uint32_t id) |
| 36 |
{
|
| 37 |
env->cp15.c0_cpuid = id; |
| 38 |
switch (id) {
|
| 39 |
case ARM_CPUID_ARM926:
|
| 40 |
set_feature(env, ARM_FEATURE_VFP); |
| 41 |
env->vfp.xregs[ARM_VFP_FPSID] = 0x41011090;
|
| 42 |
env->cp15.c0_cachetype = 0x1dd20d2;
|
| 43 |
env->cp15.c1_sys = 0x00090078;
|
| 44 |
break;
|
| 45 |
case ARM_CPUID_ARM946:
|
| 46 |
set_feature(env, ARM_FEATURE_MPU); |
| 47 |
env->cp15.c0_cachetype = 0x0f004006;
|
| 48 |
env->cp15.c1_sys = 0x00000078;
|
| 49 |
break;
|
| 50 |
case ARM_CPUID_ARM1026:
|
| 51 |
set_feature(env, ARM_FEATURE_VFP); |
| 52 |
set_feature(env, ARM_FEATURE_AUXCR); |
| 53 |
env->vfp.xregs[ARM_VFP_FPSID] = 0x410110a0;
|
| 54 |
env->cp15.c0_cachetype = 0x1dd20d2;
|
| 55 |
env->cp15.c1_sys = 0x00090078;
|
| 56 |
break;
|
| 57 |
case ARM_CPUID_ARM1136:
|
| 58 |
set_feature(env, ARM_FEATURE_V6); |
| 59 |
set_feature(env, ARM_FEATURE_VFP); |
| 60 |
set_feature(env, ARM_FEATURE_AUXCR); |
| 61 |
env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
|
| 62 |
env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
|
| 63 |
env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
|
| 64 |
memcpy(env->cp15.c0_c1, arm1136_cp15_c0_c1, 8 * sizeof(uint32_t)); |
| 65 |
memcpy(env->cp15.c0_c1, arm1136_cp15_c0_c2, 8 * sizeof(uint32_t)); |
| 66 |
env->cp15.c0_cachetype = 0x1dd20d2;
|
| 67 |
break;
|
| 68 |
case ARM_CPUID_ARM11MPCORE:
|
| 69 |
set_feature(env, ARM_FEATURE_V6); |
| 70 |
set_feature(env, ARM_FEATURE_V6K); |
| 71 |
set_feature(env, ARM_FEATURE_VFP); |
| 72 |
set_feature(env, ARM_FEATURE_AUXCR); |
| 73 |
env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
|
| 74 |
env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
|
| 75 |
env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
|
| 76 |
memcpy(env->cp15.c0_c1, mpcore_cp15_c0_c1, 8 * sizeof(uint32_t)); |
| 77 |
memcpy(env->cp15.c0_c1, mpcore_cp15_c0_c2, 8 * sizeof(uint32_t)); |
| 78 |
env->cp15.c0_cachetype = 0x1dd20d2;
|
| 79 |
break;
|
| 80 |
case ARM_CPUID_CORTEXA8:
|
| 81 |
set_feature(env, ARM_FEATURE_V6); |
| 82 |
set_feature(env, ARM_FEATURE_V6K); |
| 83 |
set_feature(env, ARM_FEATURE_V7); |
| 84 |
set_feature(env, ARM_FEATURE_AUXCR); |
| 85 |
set_feature(env, ARM_FEATURE_THUMB2); |
| 86 |
set_feature(env, ARM_FEATURE_VFP); |
| 87 |
set_feature(env, ARM_FEATURE_VFP3); |
| 88 |
set_feature(env, ARM_FEATURE_NEON); |
| 89 |
env->vfp.xregs[ARM_VFP_FPSID] = 0x410330c0;
|
| 90 |
env->vfp.xregs[ARM_VFP_MVFR0] = 0x11110222;
|
| 91 |
env->vfp.xregs[ARM_VFP_MVFR1] = 0x00011100;
|
| 92 |
memcpy(env->cp15.c0_c1, cortexa8_cp15_c0_c1, 8 * sizeof(uint32_t)); |
| 93 |
memcpy(env->cp15.c0_c1, cortexa8_cp15_c0_c2, 8 * sizeof(uint32_t)); |
| 94 |
env->cp15.c0_cachetype = 0x1dd20d2;
|
| 95 |
break;
|
| 96 |
case ARM_CPUID_CORTEXM3:
|
| 97 |
set_feature(env, ARM_FEATURE_V6); |
| 98 |
set_feature(env, ARM_FEATURE_THUMB2); |
| 99 |
set_feature(env, ARM_FEATURE_V7); |
| 100 |
set_feature(env, ARM_FEATURE_M); |
| 101 |
set_feature(env, ARM_FEATURE_DIV); |
| 102 |
break;
|
| 103 |
case ARM_CPUID_ANY: /* For userspace emulation. */ |
| 104 |
set_feature(env, ARM_FEATURE_V6); |
| 105 |
set_feature(env, ARM_FEATURE_V6K); |
| 106 |
set_feature(env, ARM_FEATURE_V7); |
| 107 |
set_feature(env, ARM_FEATURE_THUMB2); |
| 108 |
set_feature(env, ARM_FEATURE_VFP); |
| 109 |
set_feature(env, ARM_FEATURE_VFP3); |
| 110 |
set_feature(env, ARM_FEATURE_NEON); |
| 111 |
set_feature(env, ARM_FEATURE_DIV); |
| 112 |
break;
|
| 113 |
case ARM_CPUID_TI915T:
|
| 114 |
case ARM_CPUID_TI925T:
|
| 115 |
set_feature(env, ARM_FEATURE_OMAPCP); |
| 116 |
env->cp15.c0_cpuid = ARM_CPUID_TI925T; /* Depends on wiring. */
|
| 117 |
env->cp15.c0_cachetype = 0x5109149;
|
| 118 |
env->cp15.c1_sys = 0x00000070;
|
| 119 |
env->cp15.c15_i_max = 0x000;
|
| 120 |
env->cp15.c15_i_min = 0xff0;
|
| 121 |
break;
|
| 122 |
case ARM_CPUID_PXA250:
|
| 123 |
case ARM_CPUID_PXA255:
|
| 124 |
case ARM_CPUID_PXA260:
|
| 125 |
case ARM_CPUID_PXA261:
|
| 126 |
case ARM_CPUID_PXA262:
|
| 127 |
set_feature(env, ARM_FEATURE_XSCALE); |
| 128 |
/* JTAG_ID is ((id << 28) | 0x09265013) */
|
| 129 |
env->cp15.c0_cachetype = 0xd172172;
|
| 130 |
env->cp15.c1_sys = 0x00000078;
|
| 131 |
break;
|
| 132 |
case ARM_CPUID_PXA270_A0:
|
| 133 |
case ARM_CPUID_PXA270_A1:
|
| 134 |
case ARM_CPUID_PXA270_B0:
|
| 135 |
case ARM_CPUID_PXA270_B1:
|
| 136 |
case ARM_CPUID_PXA270_C0:
|
| 137 |
case ARM_CPUID_PXA270_C5:
|
| 138 |
set_feature(env, ARM_FEATURE_XSCALE); |
| 139 |
/* JTAG_ID is ((id << 28) | 0x09265013) */
|
| 140 |
set_feature(env, ARM_FEATURE_IWMMXT); |
| 141 |
env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q'; |
| 142 |
env->cp15.c0_cachetype = 0xd172172;
|
| 143 |
env->cp15.c1_sys = 0x00000078;
|
| 144 |
break;
|
| 145 |
default:
|
| 146 |
cpu_abort(env, "Bad CPU ID: %x\n", id);
|
| 147 |
break;
|
| 148 |
} |
| 149 |
} |
| 150 |
|
| 151 |
void cpu_reset(CPUARMState *env)
|
| 152 |
{
|
| 153 |
uint32_t id; |
| 154 |
id = env->cp15.c0_cpuid; |
| 155 |
memset(env, 0, offsetof(CPUARMState, breakpoints));
|
| 156 |
if (id)
|
| 157 |
cpu_reset_model_id(env, id); |
| 158 |
#if defined (CONFIG_USER_ONLY)
|
| 159 |
env->uncached_cpsr = ARM_CPU_MODE_USR; |
| 160 |
env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30; |
| 161 |
#else
|
| 162 |
/* SVC mode with interrupts disabled. */
|
| 163 |
env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I; |
| 164 |
/* On ARMv7-M the CPSR_I is the value of the PRIMASK register, and is
|
| 165 |
clear at reset. */
|
| 166 |
if (IS_M(env))
|
| 167 |
env->uncached_cpsr &= ~CPSR_I; |
| 168 |
env->vfp.xregs[ARM_VFP_FPEXC] = 0;
|
| 169 |
#endif
|
| 170 |
env->regs[15] = 0; |
| 171 |
tlb_flush(env, 1);
|
| 172 |
} |
| 173 |
|
| 174 |
CPUARMState *cpu_arm_init(const char *cpu_model) |
| 175 |
{
|
| 176 |
CPUARMState *env; |
| 177 |
uint32_t id; |
| 178 |
static int inited = 0; |
| 179 |
|
| 180 |
id = cpu_arm_find_by_name(cpu_model); |
| 181 |
if (id == 0) |
| 182 |
return NULL; |
| 183 |
env = qemu_mallocz(sizeof(CPUARMState));
|
| 184 |
if (!env)
|
| 185 |
return NULL; |
| 186 |
cpu_exec_init(env); |
| 187 |
if (!inited) {
|
| 188 |
inited = 1;
|
| 189 |
arm_translate_init(); |
| 190 |
} |
| 191 |
|
| 192 |
env->cpu_model_str = cpu_model; |
| 193 |
env->cp15.c0_cpuid = id; |
| 194 |
cpu_reset(env); |
| 195 |
return env;
|
| 196 |
} |
| 197 |
|
| 198 |
struct arm_cpu_t {
|
| 199 |
uint32_t id; |
| 200 |
const char *name; |
| 201 |
}; |
| 202 |
|
| 203 |
static const struct arm_cpu_t arm_cpu_names[] = { |
| 204 |
{ ARM_CPUID_ARM926, "arm926"},
|
| 205 |
{ ARM_CPUID_ARM946, "arm946"},
|
| 206 |
{ ARM_CPUID_ARM1026, "arm1026"},
|
| 207 |
{ ARM_CPUID_ARM1136, "arm1136"},
|
| 208 |
{ ARM_CPUID_ARM11MPCORE, "arm11mpcore"},
|
| 209 |
{ ARM_CPUID_CORTEXM3, "cortex-m3"},
|
| 210 |
{ ARM_CPUID_CORTEXA8, "cortex-a8"},
|
| 211 |
{ ARM_CPUID_TI925T, "ti925t" },
|
| 212 |
{ ARM_CPUID_PXA250, "pxa250" },
|
| 213 |
{ ARM_CPUID_PXA255, "pxa255" },
|
| 214 |
{ ARM_CPUID_PXA260, "pxa260" },
|
| 215 |
{ ARM_CPUID_PXA261, "pxa261" },
|
| 216 |
{ ARM_CPUID_PXA262, "pxa262" },
|
| 217 |
{ ARM_CPUID_PXA270, "pxa270" },
|
| 218 |
{ ARM_CPUID_PXA270_A0, "pxa270-a0" },
|
| 219 |
{ ARM_CPUID_PXA270_A1, "pxa270-a1" },
|
| 220 |
{ ARM_CPUID_PXA270_B0, "pxa270-b0" },
|
| 221 |
{ ARM_CPUID_PXA270_B1, "pxa270-b1" },
|
| 222 |
{ ARM_CPUID_PXA270_C0, "pxa270-c0" },
|
| 223 |
{ ARM_CPUID_PXA270_C5, "pxa270-c5" },
|
| 224 |
{ ARM_CPUID_ANY, "any"},
|
| 225 |
{ 0, NULL}
|
| 226 |
}; |
| 227 |
|
| 228 |
void arm_cpu_list(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...)) |
| 229 |
{
|
| 230 |
int i;
|
| 231 |
|
| 232 |
(*cpu_fprintf)(f, "Available CPUs:\n");
|
| 233 |
for (i = 0; arm_cpu_names[i].name; i++) { |
| 234 |
(*cpu_fprintf)(f, " %s\n", arm_cpu_names[i].name);
|
| 235 |
} |
| 236 |
} |
| 237 |
|
| 238 |
/* return 0 if not found */
|
| 239 |
static uint32_t cpu_arm_find_by_name(const char *name) |
| 240 |
{
|
| 241 |
int i;
|
| 242 |
uint32_t id; |
| 243 |
|
| 244 |
id = 0;
|
| 245 |
for (i = 0; arm_cpu_names[i].name; i++) { |
| 246 |
if (strcmp(name, arm_cpu_names[i].name) == 0) { |
| 247 |
id = arm_cpu_names[i].id; |
| 248 |
break;
|
| 249 |
} |
| 250 |
} |
| 251 |
return id;
|
| 252 |
} |
| 253 |
|
| 254 |
void cpu_arm_close(CPUARMState *env)
|
| 255 |
{
|
| 256 |
free(env); |
| 257 |
} |
| 258 |
|
| 259 |
uint32_t cpsr_read(CPUARMState *env) |
| 260 |
{
|
| 261 |
int ZF;
|
| 262 |
ZF = (env->NZF == 0);
|
| 263 |
return env->uncached_cpsr | (env->NZF & 0x80000000) | (ZF << 30) | |
| 264 |
(env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27) |
| 265 |
| (env->thumb << 5) | ((env->condexec_bits & 3) << 25) |
| 266 |
| ((env->condexec_bits & 0xfc) << 8) |
| 267 |
| (env->GE << 16);
|
| 268 |
} |
| 269 |
|
| 270 |
void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
|
| 271 |
{
|
| 272 |
/* NOTE: N = 1 and Z = 1 cannot be stored currently */
|
| 273 |
if (mask & CPSR_NZCV) {
|
| 274 |
env->NZF = (val & 0xc0000000) ^ 0x40000000; |
| 275 |
env->CF = (val >> 29) & 1; |
| 276 |
env->VF = (val << 3) & 0x80000000; |
| 277 |
} |
| 278 |
if (mask & CPSR_Q)
|
| 279 |
env->QF = ((val & CPSR_Q) != 0);
|
| 280 |
if (mask & CPSR_T)
|
| 281 |
env->thumb = ((val & CPSR_T) != 0);
|
| 282 |
if (mask & CPSR_IT_0_1) {
|
| 283 |
env->condexec_bits &= ~3;
|
| 284 |
env->condexec_bits |= (val >> 25) & 3; |
| 285 |
} |
| 286 |
if (mask & CPSR_IT_2_7) {
|
| 287 |
env->condexec_bits &= 3;
|
| 288 |
env->condexec_bits |= (val >> 8) & 0xfc; |
| 289 |
} |
| 290 |
if (mask & CPSR_GE) {
|
| 291 |
env->GE = (val >> 16) & 0xf; |
| 292 |
} |
| 293 |
|
| 294 |
if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
|
| 295 |
switch_mode(env, val & CPSR_M); |
| 296 |
} |
| 297 |
mask &= ~CACHED_CPSR_BITS; |
| 298 |
env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask); |
| 299 |
} |
| 300 |
|
| 301 |
/* Sign/zero extend */
|
| 302 |
uint32_t HELPER(sxtb16)(uint32_t x) |
| 303 |
{
|
| 304 |
uint32_t res; |
| 305 |
res = (uint16_t)(int8_t)x; |
| 306 |
res |= (uint32_t)(int8_t)(x >> 16) << 16; |
| 307 |
return res;
|
| 308 |
} |
| 309 |
|
| 310 |
uint32_t HELPER(uxtb16)(uint32_t x) |
| 311 |
{
|
| 312 |
uint32_t res; |
| 313 |
res = (uint16_t)(uint8_t)x; |
| 314 |
res |= (uint32_t)(uint8_t)(x >> 16) << 16; |
| 315 |
return res;
|
| 316 |
} |
| 317 |
|
| 318 |
uint32_t HELPER(clz)(uint32_t x) |
| 319 |
{
|
| 320 |
int count;
|
| 321 |
for (count = 32; x; count--) |
| 322 |
x >>= 1;
|
| 323 |
return count;
|
| 324 |
} |
| 325 |
|
| 326 |
int32_t HELPER(sdiv)(int32_t num, int32_t den) |
| 327 |
{
|
| 328 |
if (den == 0) |
| 329 |
return 0; |
| 330 |
return num / den;
|
| 331 |
} |
| 332 |
|
| 333 |
uint32_t HELPER(udiv)(uint32_t num, uint32_t den) |
| 334 |
{
|
| 335 |
if (den == 0) |
| 336 |
return 0; |
| 337 |
return num / den;
|
| 338 |
} |
| 339 |
|
| 340 |
uint32_t HELPER(rbit)(uint32_t x) |
| 341 |
{
|
| 342 |
x = ((x & 0xff000000) >> 24) |
| 343 |
| ((x & 0x00ff0000) >> 8) |
| 344 |
| ((x & 0x0000ff00) << 8) |
| 345 |
| ((x & 0x000000ff) << 24); |
| 346 |
x = ((x & 0xf0f0f0f0) >> 4) |
| 347 |
| ((x & 0x0f0f0f0f) << 4); |
| 348 |
x = ((x & 0x88888888) >> 3) |
| 349 |
| ((x & 0x44444444) >> 1) |
| 350 |
| ((x & 0x22222222) << 1) |
| 351 |
| ((x & 0x11111111) << 3); |
| 352 |
return x;
|
| 353 |
} |
| 354 |
|
| 355 |
uint32_t HELPER(abs)(uint32_t x) |
| 356 |
{
|
| 357 |
return ((int32_t)x < 0) ? -x : x; |
| 358 |
} |
| 359 |
|
| 360 |
#if defined(CONFIG_USER_ONLY)
|
| 361 |
|
| 362 |
void do_interrupt (CPUState *env)
|
| 363 |
{
|
| 364 |
env->exception_index = -1;
|
| 365 |
} |
| 366 |
|
| 367 |
/* Structure used to record exclusive memory locations. */
|
| 368 |
typedef struct mmon_state { |
| 369 |
struct mmon_state *next;
|
| 370 |
CPUARMState *cpu_env; |
| 371 |
uint32_t addr; |
| 372 |
} mmon_state; |
| 373 |
|
| 374 |
/* Chain of current locks. */
|
| 375 |
static mmon_state* mmon_head = NULL; |
| 376 |
|
| 377 |
int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address, int rw, |
| 378 |
int mmu_idx, int is_softmmu) |
| 379 |
{
|
| 380 |
if (rw == 2) { |
| 381 |
env->exception_index = EXCP_PREFETCH_ABORT; |
| 382 |
env->cp15.c6_insn = address; |
| 383 |
} else {
|
| 384 |
env->exception_index = EXCP_DATA_ABORT; |
| 385 |
env->cp15.c6_data = address; |
| 386 |
} |
| 387 |
return 1; |
| 388 |
} |
| 389 |
|
| 390 |
static void allocate_mmon_state(CPUState *env) |
| 391 |
{
|
| 392 |
env->mmon_entry = malloc(sizeof (mmon_state));
|
| 393 |
if (!env->mmon_entry)
|
| 394 |
abort(); |
| 395 |
memset (env->mmon_entry, 0, sizeof (mmon_state)); |
| 396 |
env->mmon_entry->cpu_env = env; |
| 397 |
mmon_head = env->mmon_entry; |
| 398 |
} |
| 399 |
|
| 400 |
/* Flush any monitor locks for the specified address. */
|
| 401 |
static void flush_mmon(uint32_t addr) |
| 402 |
{
|
| 403 |
mmon_state *mon; |
| 404 |
|
| 405 |
for (mon = mmon_head; mon; mon = mon->next)
|
| 406 |
{
|
| 407 |
if (mon->addr != addr)
|
| 408 |
continue;
|
| 409 |
|
| 410 |
mon->addr = 0;
|
| 411 |
break;
|
| 412 |
} |
| 413 |
} |
| 414 |
|
| 415 |
/* Mark an address for exclusive access. */
|
| 416 |
void HELPER(mark_exclusive)(CPUState *env, uint32_t addr)
|
| 417 |
{
|
| 418 |
if (!env->mmon_entry)
|
| 419 |
allocate_mmon_state(env); |
| 420 |
/* Clear any previous locks. */
|
| 421 |
flush_mmon(addr); |
| 422 |
env->mmon_entry->addr = addr; |
| 423 |
} |
| 424 |
|
| 425 |
/* Test if an exclusive address is still exclusive. Returns zero
|
| 426 |
if the address is still exclusive. */
|
| 427 |
uint32_t HELPER(test_exclusive)(CPUState *env, uint32_t addr) |
| 428 |
{
|
| 429 |
int res;
|
| 430 |
|
| 431 |
if (!env->mmon_entry)
|
| 432 |
return 1; |
| 433 |
if (env->mmon_entry->addr == addr)
|
| 434 |
res = 0;
|
| 435 |
else
|
| 436 |
res = 1;
|
| 437 |
flush_mmon(addr); |
| 438 |
return res;
|
| 439 |
} |
| 440 |
|
| 441 |
void HELPER(clrex)(CPUState *env)
|
| 442 |
{
|
| 443 |
if (!(env->mmon_entry && env->mmon_entry->addr))
|
| 444 |
return;
|
| 445 |
flush_mmon(env->mmon_entry->addr); |
| 446 |
} |
| 447 |
|
| 448 |
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) |
| 449 |
{
|
| 450 |
return addr;
|
| 451 |
} |
| 452 |
|
| 453 |
/* These should probably raise undefined insn exceptions. */
|
| 454 |
void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val)
|
| 455 |
{
|
| 456 |
int op1 = (insn >> 8) & 0xf; |
| 457 |
cpu_abort(env, "cp%i insn %08x\n", op1, insn);
|
| 458 |
return;
|
| 459 |
} |
| 460 |
|
| 461 |
uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn) |
| 462 |
{
|
| 463 |
int op1 = (insn >> 8) & 0xf; |
| 464 |
cpu_abort(env, "cp%i insn %08x\n", op1, insn);
|
| 465 |
return 0; |
| 466 |
} |
| 467 |
|
| 468 |
void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
|
| 469 |
{
|
| 470 |
cpu_abort(env, "cp15 insn %08x\n", insn);
|
| 471 |
} |
| 472 |
|
| 473 |
uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn) |
| 474 |
{
|
| 475 |
cpu_abort(env, "cp15 insn %08x\n", insn);
|
| 476 |
return 0; |
| 477 |
} |
| 478 |
|
| 479 |
/* These should probably raise undefined insn exceptions. */
|
| 480 |
void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val)
|
| 481 |
{
|
| 482 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
| 483 |
} |
| 484 |
|
| 485 |
uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg) |
| 486 |
{
|
| 487 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
| 488 |
return 0; |
| 489 |
} |
| 490 |
|
| 491 |
void switch_mode(CPUState *env, int mode) |
| 492 |
{
|
| 493 |
if (mode != ARM_CPU_MODE_USR)
|
| 494 |
cpu_abort(env, "Tried to switch out of user mode\n");
|
| 495 |
} |
| 496 |
|
| 497 |
void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val)
|
| 498 |
{
|
| 499 |
cpu_abort(env, "banked r13 write\n");
|
| 500 |
} |
| 501 |
|
| 502 |
uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode) |
| 503 |
{
|
| 504 |
cpu_abort(env, "banked r13 read\n");
|
| 505 |
return 0; |
| 506 |
} |
| 507 |
|
| 508 |
#else
|
| 509 |
|
| 510 |
extern int semihosting_enabled; |
| 511 |
|
| 512 |
/* Map CPU modes onto saved register banks. */
|
| 513 |
static inline int bank_number (int mode) |
| 514 |
{
|
| 515 |
switch (mode) {
|
| 516 |
case ARM_CPU_MODE_USR:
|
| 517 |
case ARM_CPU_MODE_SYS:
|
| 518 |
return 0; |
| 519 |
case ARM_CPU_MODE_SVC:
|
| 520 |
return 1; |
| 521 |
case ARM_CPU_MODE_ABT:
|
| 522 |
return 2; |
| 523 |
case ARM_CPU_MODE_UND:
|
| 524 |
return 3; |
| 525 |
case ARM_CPU_MODE_IRQ:
|
| 526 |
return 4; |
| 527 |
case ARM_CPU_MODE_FIQ:
|
| 528 |
return 5; |
| 529 |
} |
| 530 |
cpu_abort(cpu_single_env, "Bad mode %x\n", mode);
|
| 531 |
return -1; |
| 532 |
} |
| 533 |
|
| 534 |
void switch_mode(CPUState *env, int mode) |
| 535 |
{
|
| 536 |
int old_mode;
|
| 537 |
int i;
|
| 538 |
|
| 539 |
old_mode = env->uncached_cpsr & CPSR_M; |
| 540 |
if (mode == old_mode)
|
| 541 |
return;
|
| 542 |
|
| 543 |
if (old_mode == ARM_CPU_MODE_FIQ) {
|
| 544 |
memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
| 545 |
memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t)); |
| 546 |
} else if (mode == ARM_CPU_MODE_FIQ) { |
| 547 |
memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
| 548 |
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t)); |
| 549 |
} |
| 550 |
|
| 551 |
i = bank_number(old_mode); |
| 552 |
env->banked_r13[i] = env->regs[13];
|
| 553 |
env->banked_r14[i] = env->regs[14];
|
| 554 |
env->banked_spsr[i] = env->spsr; |
| 555 |
|
| 556 |
i = bank_number(mode); |
| 557 |
env->regs[13] = env->banked_r13[i];
|
| 558 |
env->regs[14] = env->banked_r14[i];
|
| 559 |
env->spsr = env->banked_spsr[i]; |
| 560 |
} |
| 561 |
|
| 562 |
static void v7m_push(CPUARMState *env, uint32_t val) |
| 563 |
{
|
| 564 |
env->regs[13] -= 4; |
| 565 |
stl_phys(env->regs[13], val);
|
| 566 |
} |
| 567 |
|
| 568 |
static uint32_t v7m_pop(CPUARMState *env)
|
| 569 |
{
|
| 570 |
uint32_t val; |
| 571 |
val = ldl_phys(env->regs[13]);
|
| 572 |
env->regs[13] += 4; |
| 573 |
return val;
|
| 574 |
} |
| 575 |
|
| 576 |
/* Switch to V7M main or process stack pointer. */
|
| 577 |
static void switch_v7m_sp(CPUARMState *env, int process) |
| 578 |
{
|
| 579 |
uint32_t tmp; |
| 580 |
if (env->v7m.current_sp != process) {
|
| 581 |
tmp = env->v7m.other_sp; |
| 582 |
env->v7m.other_sp = env->regs[13];
|
| 583 |
env->regs[13] = tmp;
|
| 584 |
env->v7m.current_sp = process; |
| 585 |
} |
| 586 |
} |
| 587 |
|
| 588 |
static void do_v7m_exception_exit(CPUARMState *env) |
| 589 |
{
|
| 590 |
uint32_t type; |
| 591 |
uint32_t xpsr; |
| 592 |
|
| 593 |
type = env->regs[15];
|
| 594 |
if (env->v7m.exception != 0) |
| 595 |
armv7m_nvic_complete_irq(env->v7m.nvic, env->v7m.exception); |
| 596 |
|
| 597 |
/* Switch to the target stack. */
|
| 598 |
switch_v7m_sp(env, (type & 4) != 0); |
| 599 |
/* Pop registers. */
|
| 600 |
env->regs[0] = v7m_pop(env);
|
| 601 |
env->regs[1] = v7m_pop(env);
|
| 602 |
env->regs[2] = v7m_pop(env);
|
| 603 |
env->regs[3] = v7m_pop(env);
|
| 604 |
env->regs[12] = v7m_pop(env);
|
| 605 |
env->regs[14] = v7m_pop(env);
|
| 606 |
env->regs[15] = v7m_pop(env);
|
| 607 |
xpsr = v7m_pop(env); |
| 608 |
xpsr_write(env, xpsr, 0xfffffdff);
|
| 609 |
/* Undo stack alignment. */
|
| 610 |
if (xpsr & 0x200) |
| 611 |
env->regs[13] |= 4; |
| 612 |
/* ??? The exception return type specifies Thread/Handler mode. However
|
| 613 |
this is also implied by the xPSR value. Not sure what to do
|
| 614 |
if there is a mismatch. */
|
| 615 |
/* ??? Likewise for mismatches between the CONTROL register and the stack
|
| 616 |
pointer. */
|
| 617 |
} |
| 618 |
|
| 619 |
void do_interrupt_v7m(CPUARMState *env)
|
| 620 |
{
|
| 621 |
uint32_t xpsr = xpsr_read(env); |
| 622 |
uint32_t lr; |
| 623 |
uint32_t addr; |
| 624 |
|
| 625 |
lr = 0xfffffff1;
|
| 626 |
if (env->v7m.current_sp)
|
| 627 |
lr |= 4;
|
| 628 |
if (env->v7m.exception == 0) |
| 629 |
lr |= 8;
|
| 630 |
|
| 631 |
/* For exceptions we just mark as pending on the NVIC, and let that
|
| 632 |
handle it. */
|
| 633 |
/* TODO: Need to escalate if the current priority is higher than the
|
| 634 |
one we're raising. */
|
| 635 |
switch (env->exception_index) {
|
| 636 |
case EXCP_UDEF:
|
| 637 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_USAGE); |
| 638 |
return;
|
| 639 |
case EXCP_SWI:
|
| 640 |
env->regs[15] += 2; |
| 641 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_SVC); |
| 642 |
return;
|
| 643 |
case EXCP_PREFETCH_ABORT:
|
| 644 |
case EXCP_DATA_ABORT:
|
| 645 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_MEM); |
| 646 |
return;
|
| 647 |
case EXCP_BKPT:
|
| 648 |
if (semihosting_enabled) {
|
| 649 |
int nr;
|
| 650 |
nr = lduw_code(env->regs[15]) & 0xff; |
| 651 |
if (nr == 0xab) { |
| 652 |
env->regs[15] += 2; |
| 653 |
env->regs[0] = do_arm_semihosting(env);
|
| 654 |
return;
|
| 655 |
} |
| 656 |
} |
| 657 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_DEBUG); |
| 658 |
return;
|
| 659 |
case EXCP_IRQ:
|
| 660 |
env->v7m.exception = armv7m_nvic_acknowledge_irq(env->v7m.nvic); |
| 661 |
break;
|
| 662 |
case EXCP_EXCEPTION_EXIT:
|
| 663 |
do_v7m_exception_exit(env); |
| 664 |
return;
|
| 665 |
default:
|
| 666 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
| 667 |
return; /* Never happens. Keep compiler happy. */ |
| 668 |
} |
| 669 |
|
| 670 |
/* Align stack pointer. */
|
| 671 |
/* ??? Should only do this if Configuration Control Register
|
| 672 |
STACKALIGN bit is set. */
|
| 673 |
if (env->regs[13] & 4) { |
| 674 |
env->regs[13] += 4; |
| 675 |
xpsr |= 0x200;
|
| 676 |
} |
| 677 |
/* Switch to the hander mode. */
|
| 678 |
v7m_push(env, xpsr); |
| 679 |
v7m_push(env, env->regs[15]);
|
| 680 |
v7m_push(env, env->regs[14]);
|
| 681 |
v7m_push(env, env->regs[12]);
|
| 682 |
v7m_push(env, env->regs[3]);
|
| 683 |
v7m_push(env, env->regs[2]);
|
| 684 |
v7m_push(env, env->regs[1]);
|
| 685 |
v7m_push(env, env->regs[0]);
|
| 686 |
switch_v7m_sp(env, 0);
|
| 687 |
env->uncached_cpsr &= ~CPSR_IT; |
| 688 |
env->regs[14] = lr;
|
| 689 |
addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4);
|
| 690 |
env->regs[15] = addr & 0xfffffffe; |
| 691 |
env->thumb = addr & 1;
|
| 692 |
} |
| 693 |
|
| 694 |
/* Handle a CPU exception. */
|
| 695 |
void do_interrupt(CPUARMState *env)
|
| 696 |
{
|
| 697 |
uint32_t addr; |
| 698 |
uint32_t mask; |
| 699 |
int new_mode;
|
| 700 |
uint32_t offset; |
| 701 |
|
| 702 |
if (IS_M(env)) {
|
| 703 |
do_interrupt_v7m(env); |
| 704 |
return;
|
| 705 |
} |
| 706 |
/* TODO: Vectored interrupt controller. */
|
| 707 |
switch (env->exception_index) {
|
| 708 |
case EXCP_UDEF:
|
| 709 |
new_mode = ARM_CPU_MODE_UND; |
| 710 |
addr = 0x04;
|
| 711 |
mask = CPSR_I; |
| 712 |
if (env->thumb)
|
| 713 |
offset = 2;
|
| 714 |
else
|
| 715 |
offset = 4;
|
| 716 |
break;
|
| 717 |
case EXCP_SWI:
|
| 718 |
if (semihosting_enabled) {
|
| 719 |
/* Check for semihosting interrupt. */
|
| 720 |
if (env->thumb) {
|
| 721 |
mask = lduw_code(env->regs[15] - 2) & 0xff; |
| 722 |
} else {
|
| 723 |
mask = ldl_code(env->regs[15] - 4) & 0xffffff; |
| 724 |
} |
| 725 |
/* Only intercept calls from privileged modes, to provide some
|
| 726 |
semblance of security. */
|
| 727 |
if (((mask == 0x123456 && !env->thumb) |
| 728 |
|| (mask == 0xab && env->thumb))
|
| 729 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
|
| 730 |
env->regs[0] = do_arm_semihosting(env);
|
| 731 |
return;
|
| 732 |
} |
| 733 |
} |
| 734 |
new_mode = ARM_CPU_MODE_SVC; |
| 735 |
addr = 0x08;
|
| 736 |
mask = CPSR_I; |
| 737 |
/* The PC already points to the next instructon. */
|
| 738 |
offset = 0;
|
| 739 |
break;
|
| 740 |
case EXCP_BKPT:
|
| 741 |
/* See if this is a semihosting syscall. */
|
| 742 |
if (env->thumb && semihosting_enabled) {
|
| 743 |
mask = lduw_code(env->regs[15]) & 0xff; |
| 744 |
if (mask == 0xab |
| 745 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
|
| 746 |
env->regs[15] += 2; |
| 747 |
env->regs[0] = do_arm_semihosting(env);
|
| 748 |
return;
|
| 749 |
} |
| 750 |
} |
| 751 |
/* Fall through to prefetch abort. */
|
| 752 |
case EXCP_PREFETCH_ABORT:
|
| 753 |
new_mode = ARM_CPU_MODE_ABT; |
| 754 |
addr = 0x0c;
|
| 755 |
mask = CPSR_A | CPSR_I; |
| 756 |
offset = 4;
|
| 757 |
break;
|
| 758 |
case EXCP_DATA_ABORT:
|
| 759 |
new_mode = ARM_CPU_MODE_ABT; |
| 760 |
addr = 0x10;
|
| 761 |
mask = CPSR_A | CPSR_I; |
| 762 |
offset = 8;
|
| 763 |
break;
|
| 764 |
case EXCP_IRQ:
|
| 765 |
new_mode = ARM_CPU_MODE_IRQ; |
| 766 |
addr = 0x18;
|
| 767 |
/* Disable IRQ and imprecise data aborts. */
|
| 768 |
mask = CPSR_A | CPSR_I; |
| 769 |
offset = 4;
|
| 770 |
break;
|
| 771 |
case EXCP_FIQ:
|
| 772 |
new_mode = ARM_CPU_MODE_FIQ; |
| 773 |
addr = 0x1c;
|
| 774 |
/* Disable FIQ, IRQ and imprecise data aborts. */
|
| 775 |
mask = CPSR_A | CPSR_I | CPSR_F; |
| 776 |
offset = 4;
|
| 777 |
break;
|
| 778 |
default:
|
| 779 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
| 780 |
return; /* Never happens. Keep compiler happy. */ |
| 781 |
} |
| 782 |
/* High vectors. */
|
| 783 |
if (env->cp15.c1_sys & (1 << 13)) { |
| 784 |
addr += 0xffff0000;
|
| 785 |
} |
| 786 |
switch_mode (env, new_mode); |
| 787 |
env->spsr = cpsr_read(env); |
| 788 |
/* Clear IT bits. */
|
| 789 |
env->condexec_bits = 0;
|
| 790 |
/* Switch to the new mode, and switch to Arm mode. */
|
| 791 |
/* ??? Thumb interrupt handlers not implemented. */
|
| 792 |
env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode; |
| 793 |
env->uncached_cpsr |= mask; |
| 794 |
env->thumb = 0;
|
| 795 |
env->regs[14] = env->regs[15] + offset; |
| 796 |
env->regs[15] = addr;
|
| 797 |
env->interrupt_request |= CPU_INTERRUPT_EXITTB; |
| 798 |
} |
| 799 |
|
| 800 |
/* Check section/page access permissions.
|
| 801 |
Returns the page protection flags, or zero if the access is not
|
| 802 |
permitted. */
|
| 803 |
static inline int check_ap(CPUState *env, int ap, int domain, int access_type, |
| 804 |
int is_user)
|
| 805 |
{
|
| 806 |
int prot_ro;
|
| 807 |
|
| 808 |
if (domain == 3) |
| 809 |
return PAGE_READ | PAGE_WRITE;
|
| 810 |
|
| 811 |
if (access_type == 1) |
| 812 |
prot_ro = 0;
|
| 813 |
else
|
| 814 |
prot_ro = PAGE_READ; |
| 815 |
|
| 816 |
switch (ap) {
|
| 817 |
case 0: |
| 818 |
if (access_type == 1) |
| 819 |
return 0; |
| 820 |
switch ((env->cp15.c1_sys >> 8) & 3) { |
| 821 |
case 1: |
| 822 |
return is_user ? 0 : PAGE_READ; |
| 823 |
case 2: |
| 824 |
return PAGE_READ;
|
| 825 |
default:
|
| 826 |
return 0; |
| 827 |
} |
| 828 |
case 1: |
| 829 |
return is_user ? 0 : PAGE_READ | PAGE_WRITE; |
| 830 |
case 2: |
| 831 |
if (is_user)
|
| 832 |
return prot_ro;
|
| 833 |
else
|
| 834 |
return PAGE_READ | PAGE_WRITE;
|
| 835 |
case 3: |
| 836 |
return PAGE_READ | PAGE_WRITE;
|
| 837 |
case 4: case 7: /* Reserved. */ |
| 838 |
return 0; |
| 839 |
case 5: |
| 840 |
return is_user ? 0 : prot_ro; |
| 841 |
case 6: |
| 842 |
return prot_ro;
|
| 843 |
default:
|
| 844 |
abort(); |
| 845 |
} |
| 846 |
} |
| 847 |
|
| 848 |
static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type, |
| 849 |
int is_user, uint32_t *phys_ptr, int *prot) |
| 850 |
{
|
| 851 |
int code;
|
| 852 |
uint32_t table; |
| 853 |
uint32_t desc; |
| 854 |
int type;
|
| 855 |
int ap;
|
| 856 |
int domain;
|
| 857 |
uint32_t phys_addr; |
| 858 |
|
| 859 |
/* Pagetable walk. */
|
| 860 |
/* Lookup l1 descriptor. */
|
| 861 |
if (address & env->cp15.c2_mask)
|
| 862 |
table = env->cp15.c2_base1; |
| 863 |
else
|
| 864 |
table = env->cp15.c2_base0; |
| 865 |
table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc); |
| 866 |
desc = ldl_phys(table); |
| 867 |
type = (desc & 3);
|
| 868 |
domain = (env->cp15.c3 >> ((desc >> 4) & 0x1e)) & 3; |
| 869 |
if (type == 0) { |
| 870 |
/* Secton translation fault. */
|
| 871 |
code = 5;
|
| 872 |
goto do_fault;
|
| 873 |
} |
| 874 |
if (domain == 0 || domain == 2) { |
| 875 |
if (type == 2) |
| 876 |
code = 9; /* Section domain fault. */ |
| 877 |
else
|
| 878 |
code = 11; /* Page domain fault. */ |
| 879 |
goto do_fault;
|
| 880 |
} |
| 881 |
if (type == 2) { |
| 882 |
/* 1Mb section. */
|
| 883 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
| 884 |
ap = (desc >> 10) & 3; |
| 885 |
code = 13;
|
| 886 |
} else {
|
| 887 |
/* Lookup l2 entry. */
|
| 888 |
if (type == 1) { |
| 889 |
/* Coarse pagetable. */
|
| 890 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
| 891 |
} else {
|
| 892 |
/* Fine pagetable. */
|
| 893 |
table = (desc & 0xfffff000) | ((address >> 8) & 0xffc); |
| 894 |
} |
| 895 |
desc = ldl_phys(table); |
| 896 |
switch (desc & 3) { |
| 897 |
case 0: /* Page translation fault. */ |
| 898 |
code = 7;
|
| 899 |
goto do_fault;
|
| 900 |
case 1: /* 64k page. */ |
| 901 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
| 902 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
| 903 |
break;
|
| 904 |
case 2: /* 4k page. */ |
| 905 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
| 906 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
| 907 |
break;
|
| 908 |
case 3: /* 1k page. */ |
| 909 |
if (type == 1) { |
| 910 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
| 911 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
| 912 |
} else {
|
| 913 |
/* Page translation fault. */
|
| 914 |
code = 7;
|
| 915 |
goto do_fault;
|
| 916 |
} |
| 917 |
} else {
|
| 918 |
phys_addr = (desc & 0xfffffc00) | (address & 0x3ff); |
| 919 |
} |
| 920 |
ap = (desc >> 4) & 3; |
| 921 |
break;
|
| 922 |
default:
|
| 923 |
/* Never happens, but compiler isn't smart enough to tell. */
|
| 924 |
abort(); |
| 925 |
} |
| 926 |
code = 15;
|
| 927 |
} |
| 928 |
*prot = check_ap(env, ap, domain, access_type, is_user); |
| 929 |
if (!*prot) {
|
| 930 |
/* Access permission fault. */
|
| 931 |
goto do_fault;
|
| 932 |
} |
| 933 |
*phys_ptr = phys_addr; |
| 934 |
return 0; |
| 935 |
do_fault:
|
| 936 |
return code | (domain << 4); |
| 937 |
} |
| 938 |
|
| 939 |
static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type, |
| 940 |
int is_user, uint32_t *phys_ptr, int *prot) |
| 941 |
{
|
| 942 |
int code;
|
| 943 |
uint32_t table; |
| 944 |
uint32_t desc; |
| 945 |
uint32_t xn; |
| 946 |
int type;
|
| 947 |
int ap;
|
| 948 |
int domain;
|
| 949 |
uint32_t phys_addr; |
| 950 |
|
| 951 |
/* Pagetable walk. */
|
| 952 |
/* Lookup l1 descriptor. */
|
| 953 |
if (address & env->cp15.c2_mask)
|
| 954 |
table = env->cp15.c2_base1; |
| 955 |
else
|
| 956 |
table = env->cp15.c2_base0; |
| 957 |
table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc); |
| 958 |
desc = ldl_phys(table); |
| 959 |
type = (desc & 3);
|
| 960 |
if (type == 0) { |
| 961 |
/* Secton translation fault. */
|
| 962 |
code = 5;
|
| 963 |
domain = 0;
|
| 964 |
goto do_fault;
|
| 965 |
} else if (type == 2 && (desc & (1 << 18))) { |
| 966 |
/* Supersection. */
|
| 967 |
domain = 0;
|
| 968 |
} else {
|
| 969 |
/* Section or page. */
|
| 970 |
domain = (desc >> 4) & 0x1e; |
| 971 |
} |
| 972 |
domain = (env->cp15.c3 >> domain) & 3;
|
| 973 |
if (domain == 0 || domain == 2) { |
| 974 |
if (type == 2) |
| 975 |
code = 9; /* Section domain fault. */ |
| 976 |
else
|
| 977 |
code = 11; /* Page domain fault. */ |
| 978 |
goto do_fault;
|
| 979 |
} |
| 980 |
if (type == 2) { |
| 981 |
if (desc & (1 << 18)) { |
| 982 |
/* Supersection. */
|
| 983 |
phys_addr = (desc & 0xff000000) | (address & 0x00ffffff); |
| 984 |
} else {
|
| 985 |
/* Section. */
|
| 986 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
| 987 |
} |
| 988 |
ap = ((desc >> 10) & 3) | ((desc >> 13) & 4); |
| 989 |
xn = desc & (1 << 4); |
| 990 |
code = 13;
|
| 991 |
} else {
|
| 992 |
/* Lookup l2 entry. */
|
| 993 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
| 994 |
desc = ldl_phys(table); |
| 995 |
ap = ((desc >> 4) & 3) | ((desc >> 7) & 4); |
| 996 |
switch (desc & 3) { |
| 997 |
case 0: /* Page translation fault. */ |
| 998 |
code = 7;
|
| 999 |
goto do_fault;
|
| 1000 |
case 1: /* 64k page. */ |
| 1001 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
| 1002 |
xn = desc & (1 << 15); |
| 1003 |
break;
|
| 1004 |
case 2: case 3: /* 4k page. */ |
| 1005 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
| 1006 |
xn = desc & 1;
|
| 1007 |
break;
|
| 1008 |
default:
|
| 1009 |
/* Never happens, but compiler isn't smart enough to tell. */
|
| 1010 |
abort(); |
| 1011 |
} |
| 1012 |
code = 15;
|
| 1013 |
} |
| 1014 |
if (xn && access_type == 2) |
| 1015 |
goto do_fault;
|
| 1016 |
|
| 1017 |
*prot = check_ap(env, ap, domain, access_type, is_user); |
| 1018 |
if (!*prot) {
|
| 1019 |
/* Access permission fault. */
|
| 1020 |
goto do_fault;
|
| 1021 |
} |
| 1022 |
*phys_ptr = phys_addr; |
| 1023 |
return 0; |
| 1024 |
do_fault:
|
| 1025 |
return code | (domain << 4); |
| 1026 |
} |
| 1027 |
|
| 1028 |
static int get_phys_addr_mpu(CPUState *env, uint32_t address, int access_type, |
| 1029 |
int is_user, uint32_t *phys_ptr, int *prot) |
| 1030 |
{
|
| 1031 |
int n;
|
| 1032 |
uint32_t mask; |
| 1033 |
uint32_t base; |
| 1034 |
|
| 1035 |
*phys_ptr = address; |
| 1036 |
for (n = 7; n >= 0; n--) { |
| 1037 |
base = env->cp15.c6_region[n]; |
| 1038 |
if ((base & 1) == 0) |
| 1039 |
continue;
|
| 1040 |
mask = 1 << ((base >> 1) & 0x1f); |
| 1041 |
/* Keep this shift separate from the above to avoid an
|
| 1042 |
(undefined) << 32. */
|
| 1043 |
mask = (mask << 1) - 1; |
| 1044 |
if (((base ^ address) & ~mask) == 0) |
| 1045 |
break;
|
| 1046 |
} |
| 1047 |
if (n < 0) |
| 1048 |
return 2; |
| 1049 |
|
| 1050 |
if (access_type == 2) { |
| 1051 |
mask = env->cp15.c5_insn; |
| 1052 |
} else {
|
| 1053 |
mask = env->cp15.c5_data; |
| 1054 |
} |
| 1055 |
mask = (mask >> (n * 4)) & 0xf; |
| 1056 |
switch (mask) {
|
| 1057 |
case 0: |
| 1058 |
return 1; |
| 1059 |
case 1: |
| 1060 |
if (is_user)
|
| 1061 |
return 1; |
| 1062 |
*prot = PAGE_READ | PAGE_WRITE; |
| 1063 |
break;
|
| 1064 |
case 2: |
| 1065 |
*prot = PAGE_READ; |
| 1066 |
if (!is_user)
|
| 1067 |
*prot |= PAGE_WRITE; |
| 1068 |
break;
|
| 1069 |
case 3: |
| 1070 |
*prot = PAGE_READ | PAGE_WRITE; |
| 1071 |
break;
|
| 1072 |
case 5: |
| 1073 |
if (is_user)
|
| 1074 |
return 1; |
| 1075 |
*prot = PAGE_READ; |
| 1076 |
break;
|
| 1077 |
case 6: |
| 1078 |
*prot = PAGE_READ; |
| 1079 |
break;
|
| 1080 |
default:
|
| 1081 |
/* Bad permission. */
|
| 1082 |
return 1; |
| 1083 |
} |
| 1084 |
return 0; |
| 1085 |
} |
| 1086 |
|
| 1087 |
static inline int get_phys_addr(CPUState *env, uint32_t address, |
| 1088 |
int access_type, int is_user, |
| 1089 |
uint32_t *phys_ptr, int *prot)
|
| 1090 |
{
|
| 1091 |
/* Fast Context Switch Extension. */
|
| 1092 |
if (address < 0x02000000) |
| 1093 |
address += env->cp15.c13_fcse; |
| 1094 |
|
| 1095 |
if ((env->cp15.c1_sys & 1) == 0) { |
| 1096 |
/* MMU/MPU disabled. */
|
| 1097 |
*phys_ptr = address; |
| 1098 |
*prot = PAGE_READ | PAGE_WRITE; |
| 1099 |
return 0; |
| 1100 |
} else if (arm_feature(env, ARM_FEATURE_MPU)) { |
| 1101 |
return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
|
| 1102 |
prot); |
| 1103 |
} else if (env->cp15.c1_sys & (1 << 23)) { |
| 1104 |
return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
|
| 1105 |
prot); |
| 1106 |
} else {
|
| 1107 |
return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
|
| 1108 |
prot); |
| 1109 |
} |
| 1110 |
} |
| 1111 |
|
| 1112 |
int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address,
|
| 1113 |
int access_type, int mmu_idx, int is_softmmu) |
| 1114 |
{
|
| 1115 |
uint32_t phys_addr; |
| 1116 |
int prot;
|
| 1117 |
int ret, is_user;
|
| 1118 |
|
| 1119 |
is_user = mmu_idx == MMU_USER_IDX; |
| 1120 |
ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot); |
| 1121 |
if (ret == 0) { |
| 1122 |
/* Map a single [sub]page. */
|
| 1123 |
phys_addr &= ~(uint32_t)0x3ff;
|
| 1124 |
address &= ~(uint32_t)0x3ff;
|
| 1125 |
return tlb_set_page (env, address, phys_addr, prot, mmu_idx,
|
| 1126 |
is_softmmu); |
| 1127 |
} |
| 1128 |
|
| 1129 |
if (access_type == 2) { |
| 1130 |
env->cp15.c5_insn = ret; |
| 1131 |
env->cp15.c6_insn = address; |
| 1132 |
env->exception_index = EXCP_PREFETCH_ABORT; |
| 1133 |
} else {
|
| 1134 |
env->cp15.c5_data = ret; |
| 1135 |
if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6)) |
| 1136 |
env->cp15.c5_data |= (1 << 11); |
| 1137 |
env->cp15.c6_data = address; |
| 1138 |
env->exception_index = EXCP_DATA_ABORT; |
| 1139 |
} |
| 1140 |
return 1; |
| 1141 |
} |
| 1142 |
|
| 1143 |
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) |
| 1144 |
{
|
| 1145 |
uint32_t phys_addr; |
| 1146 |
int prot;
|
| 1147 |
int ret;
|
| 1148 |
|
| 1149 |
ret = get_phys_addr(env, addr, 0, 0, &phys_addr, &prot); |
| 1150 |
|
| 1151 |
if (ret != 0) |
| 1152 |
return -1; |
| 1153 |
|
| 1154 |
return phys_addr;
|
| 1155 |
} |
| 1156 |
|
| 1157 |
/* Not really implemented. Need to figure out a sane way of doing this.
|
| 1158 |
Maybe add generic watchpoint support and use that. */
|
| 1159 |
|
| 1160 |
void HELPER(mark_exclusive)(CPUState *env, uint32_t addr)
|
| 1161 |
{
|
| 1162 |
env->mmon_addr = addr; |
| 1163 |
} |
| 1164 |
|
| 1165 |
uint32_t HELPER(test_exclusive)(CPUState *env, uint32_t addr) |
| 1166 |
{
|
| 1167 |
return (env->mmon_addr != addr);
|
| 1168 |
} |
| 1169 |
|
| 1170 |
void HELPER(clrex)(CPUState *env)
|
| 1171 |
{
|
| 1172 |
env->mmon_addr = -1;
|
| 1173 |
} |
| 1174 |
|
| 1175 |
void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val)
|
| 1176 |
{
|
| 1177 |
int cp_num = (insn >> 8) & 0xf; |
| 1178 |
int cp_info = (insn >> 5) & 7; |
| 1179 |
int src = (insn >> 16) & 0xf; |
| 1180 |
int operand = insn & 0xf; |
| 1181 |
|
| 1182 |
if (env->cp[cp_num].cp_write)
|
| 1183 |
env->cp[cp_num].cp_write(env->cp[cp_num].opaque, |
| 1184 |
cp_info, src, operand, val); |
| 1185 |
} |
| 1186 |
|
| 1187 |
uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn) |
| 1188 |
{
|
| 1189 |
int cp_num = (insn >> 8) & 0xf; |
| 1190 |
int cp_info = (insn >> 5) & 7; |
| 1191 |
int dest = (insn >> 16) & 0xf; |
| 1192 |
int operand = insn & 0xf; |
| 1193 |
|
| 1194 |
if (env->cp[cp_num].cp_read)
|
| 1195 |
return env->cp[cp_num].cp_read(env->cp[cp_num].opaque,
|
| 1196 |
cp_info, dest, operand); |
| 1197 |
return 0; |
| 1198 |
} |
| 1199 |
|
| 1200 |
/* Return basic MPU access permission bits. */
|
| 1201 |
static uint32_t simple_mpu_ap_bits(uint32_t val)
|
| 1202 |
{
|
| 1203 |
uint32_t ret; |
| 1204 |
uint32_t mask; |
| 1205 |
int i;
|
| 1206 |
ret = 0;
|
| 1207 |
mask = 3;
|
| 1208 |
for (i = 0; i < 16; i += 2) { |
| 1209 |
ret |= (val >> i) & mask; |
| 1210 |
mask <<= 2;
|
| 1211 |
} |
| 1212 |
return ret;
|
| 1213 |
} |
| 1214 |
|
| 1215 |
/* Pad basic MPU access permission bits to extended format. */
|
| 1216 |
static uint32_t extended_mpu_ap_bits(uint32_t val)
|
| 1217 |
{
|
| 1218 |
uint32_t ret; |
| 1219 |
uint32_t mask; |
| 1220 |
int i;
|
| 1221 |
ret = 0;
|
| 1222 |
mask = 3;
|
| 1223 |
for (i = 0; i < 16; i += 2) { |
| 1224 |
ret |= (val & mask) << i; |
| 1225 |
mask <<= 2;
|
| 1226 |
} |
| 1227 |
return ret;
|
| 1228 |
} |
| 1229 |
|
| 1230 |
void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
|
| 1231 |
{
|
| 1232 |
int op1;
|
| 1233 |
int op2;
|
| 1234 |
int crm;
|
| 1235 |
|
| 1236 |
op1 = (insn >> 21) & 7; |
| 1237 |
op2 = (insn >> 5) & 7; |
| 1238 |
crm = insn & 0xf;
|
| 1239 |
switch ((insn >> 16) & 0xf) { |
| 1240 |
case 0: |
| 1241 |
if (((insn >> 21) & 7) == 2) { |
| 1242 |
/* ??? Select cache level. Ignore. */
|
| 1243 |
return;
|
| 1244 |
} |
| 1245 |
/* ID codes. */
|
| 1246 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
| 1247 |
break;
|
| 1248 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1249 |
break;
|
| 1250 |
goto bad_reg;
|
| 1251 |
case 1: /* System configuration. */ |
| 1252 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1253 |
op2 = 0;
|
| 1254 |
switch (op2) {
|
| 1255 |
case 0: |
| 1256 |
if (!arm_feature(env, ARM_FEATURE_XSCALE) || crm == 0) |
| 1257 |
env->cp15.c1_sys = val; |
| 1258 |
/* ??? Lots of these bits are not implemented. */
|
| 1259 |
/* This may enable/disable the MMU, so do a TLB flush. */
|
| 1260 |
tlb_flush(env, 1);
|
| 1261 |
break;
|
| 1262 |
case 1: /* Auxiliary cotrol register. */ |
| 1263 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
| 1264 |
env->cp15.c1_xscaleauxcr = val; |
| 1265 |
break;
|
| 1266 |
} |
| 1267 |
/* Not implemented. */
|
| 1268 |
break;
|
| 1269 |
case 2: |
| 1270 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
| 1271 |
goto bad_reg;
|
| 1272 |
env->cp15.c1_coproc = val; |
| 1273 |
/* ??? Is this safe when called from within a TB? */
|
| 1274 |
tb_flush(env); |
| 1275 |
break;
|
| 1276 |
default:
|
| 1277 |
goto bad_reg;
|
| 1278 |
} |
| 1279 |
break;
|
| 1280 |
case 2: /* MMU Page table control / MPU cache control. */ |
| 1281 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
| 1282 |
switch (op2) {
|
| 1283 |
case 0: |
| 1284 |
env->cp15.c2_data = val; |
| 1285 |
break;
|
| 1286 |
case 1: |
| 1287 |
env->cp15.c2_insn = val; |
| 1288 |
break;
|
| 1289 |
default:
|
| 1290 |
goto bad_reg;
|
| 1291 |
} |
| 1292 |
} else {
|
| 1293 |
switch (op2) {
|
| 1294 |
case 0: |
| 1295 |
env->cp15.c2_base0 = val; |
| 1296 |
break;
|
| 1297 |
case 1: |
| 1298 |
env->cp15.c2_base1 = val; |
| 1299 |
break;
|
| 1300 |
case 2: |
| 1301 |
env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> val);
|
| 1302 |
break;
|
| 1303 |
default:
|
| 1304 |
goto bad_reg;
|
| 1305 |
} |
| 1306 |
} |
| 1307 |
break;
|
| 1308 |
case 3: /* MMU Domain access control / MPU write buffer control. */ |
| 1309 |
env->cp15.c3 = val; |
| 1310 |
tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */ |
| 1311 |
break;
|
| 1312 |
case 4: /* Reserved. */ |
| 1313 |
goto bad_reg;
|
| 1314 |
case 5: /* MMU Fault status / MPU access permission. */ |
| 1315 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1316 |
op2 = 0;
|
| 1317 |
switch (op2) {
|
| 1318 |
case 0: |
| 1319 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
| 1320 |
val = extended_mpu_ap_bits(val); |
| 1321 |
env->cp15.c5_data = val; |
| 1322 |
break;
|
| 1323 |
case 1: |
| 1324 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
| 1325 |
val = extended_mpu_ap_bits(val); |
| 1326 |
env->cp15.c5_insn = val; |
| 1327 |
break;
|
| 1328 |
case 2: |
| 1329 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
| 1330 |
goto bad_reg;
|
| 1331 |
env->cp15.c5_data = val; |
| 1332 |
break;
|
| 1333 |
case 3: |
| 1334 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
| 1335 |
goto bad_reg;
|
| 1336 |
env->cp15.c5_insn = val; |
| 1337 |
break;
|
| 1338 |
default:
|
| 1339 |
goto bad_reg;
|
| 1340 |
} |
| 1341 |
break;
|
| 1342 |
case 6: /* MMU Fault address / MPU base/size. */ |
| 1343 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
| 1344 |
if (crm >= 8) |
| 1345 |
goto bad_reg;
|
| 1346 |
env->cp15.c6_region[crm] = val; |
| 1347 |
} else {
|
| 1348 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1349 |
op2 = 0;
|
| 1350 |
switch (op2) {
|
| 1351 |
case 0: |
| 1352 |
env->cp15.c6_data = val; |
| 1353 |
break;
|
| 1354 |
case 1: /* ??? This is WFAR on armv6 */ |
| 1355 |
case 2: |
| 1356 |
env->cp15.c6_insn = val; |
| 1357 |
break;
|
| 1358 |
default:
|
| 1359 |
goto bad_reg;
|
| 1360 |
} |
| 1361 |
} |
| 1362 |
break;
|
| 1363 |
case 7: /* Cache control. */ |
| 1364 |
env->cp15.c15_i_max = 0x000;
|
| 1365 |
env->cp15.c15_i_min = 0xff0;
|
| 1366 |
/* No cache, so nothing to do. */
|
| 1367 |
/* ??? MPCore has VA to PA translation functions. */
|
| 1368 |
break;
|
| 1369 |
case 8: /* MMU TLB control. */ |
| 1370 |
switch (op2) {
|
| 1371 |
case 0: /* Invalidate all. */ |
| 1372 |
tlb_flush(env, 0);
|
| 1373 |
break;
|
| 1374 |
case 1: /* Invalidate single TLB entry. */ |
| 1375 |
#if 0
|
| 1376 |
/* ??? This is wrong for large pages and sections. */
|
| 1377 |
/* As an ugly hack to make linux work we always flush a 4K
|
| 1378 |
pages. */
|
| 1379 |
val &= 0xfffff000;
|
| 1380 |
tlb_flush_page(env, val);
|
| 1381 |
tlb_flush_page(env, val + 0x400);
|
| 1382 |
tlb_flush_page(env, val + 0x800);
|
| 1383 |
tlb_flush_page(env, val + 0xc00);
|
| 1384 |
#else
|
| 1385 |
tlb_flush(env, 1);
|
| 1386 |
#endif
|
| 1387 |
break;
|
| 1388 |
case 2: /* Invalidate on ASID. */ |
| 1389 |
tlb_flush(env, val == 0);
|
| 1390 |
break;
|
| 1391 |
case 3: /* Invalidate single entry on MVA. */ |
| 1392 |
/* ??? This is like case 1, but ignores ASID. */
|
| 1393 |
tlb_flush(env, 1);
|
| 1394 |
break;
|
| 1395 |
default:
|
| 1396 |
goto bad_reg;
|
| 1397 |
} |
| 1398 |
break;
|
| 1399 |
case 9: |
| 1400 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1401 |
break;
|
| 1402 |
switch (crm) {
|
| 1403 |
case 0: /* Cache lockdown. */ |
| 1404 |
switch (op1) {
|
| 1405 |
case 0: /* L1 cache. */ |
| 1406 |
switch (op2) {
|
| 1407 |
case 0: |
| 1408 |
env->cp15.c9_data = val; |
| 1409 |
break;
|
| 1410 |
case 1: |
| 1411 |
env->cp15.c9_insn = val; |
| 1412 |
break;
|
| 1413 |
default:
|
| 1414 |
goto bad_reg;
|
| 1415 |
} |
| 1416 |
break;
|
| 1417 |
case 1: /* L2 cache. */ |
| 1418 |
/* Ignore writes to L2 lockdown/auxiliary registers. */
|
| 1419 |
break;
|
| 1420 |
default:
|
| 1421 |
goto bad_reg;
|
| 1422 |
} |
| 1423 |
break;
|
| 1424 |
case 1: /* TCM memory region registers. */ |
| 1425 |
/* Not implemented. */
|
| 1426 |
goto bad_reg;
|
| 1427 |
default:
|
| 1428 |
goto bad_reg;
|
| 1429 |
} |
| 1430 |
break;
|
| 1431 |
case 10: /* MMU TLB lockdown. */ |
| 1432 |
/* ??? TLB lockdown not implemented. */
|
| 1433 |
break;
|
| 1434 |
case 12: /* Reserved. */ |
| 1435 |
goto bad_reg;
|
| 1436 |
case 13: /* Process ID. */ |
| 1437 |
switch (op2) {
|
| 1438 |
case 0: |
| 1439 |
/* Unlike real hardware the qemu TLB uses virtual addresses,
|
| 1440 |
not modified virtual addresses, so this causes a TLB flush.
|
| 1441 |
*/
|
| 1442 |
if (env->cp15.c13_fcse != val)
|
| 1443 |
tlb_flush(env, 1);
|
| 1444 |
env->cp15.c13_fcse = val; |
| 1445 |
break;
|
| 1446 |
case 1: |
| 1447 |
/* This changes the ASID, so do a TLB flush. */
|
| 1448 |
if (env->cp15.c13_context != val
|
| 1449 |
&& !arm_feature(env, ARM_FEATURE_MPU)) |
| 1450 |
tlb_flush(env, 0);
|
| 1451 |
env->cp15.c13_context = val; |
| 1452 |
break;
|
| 1453 |
case 2: |
| 1454 |
env->cp15.c13_tls1 = val; |
| 1455 |
break;
|
| 1456 |
case 3: |
| 1457 |
env->cp15.c13_tls2 = val; |
| 1458 |
break;
|
| 1459 |
case 4: |
| 1460 |
env->cp15.c13_tls3 = val; |
| 1461 |
break;
|
| 1462 |
default:
|
| 1463 |
goto bad_reg;
|
| 1464 |
} |
| 1465 |
break;
|
| 1466 |
case 14: /* Reserved. */ |
| 1467 |
goto bad_reg;
|
| 1468 |
case 15: /* Implementation specific. */ |
| 1469 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
| 1470 |
if (op2 == 0 && crm == 1) { |
| 1471 |
if (env->cp15.c15_cpar != (val & 0x3fff)) { |
| 1472 |
/* Changes cp0 to cp13 behavior, so needs a TB flush. */
|
| 1473 |
tb_flush(env); |
| 1474 |
env->cp15.c15_cpar = val & 0x3fff;
|
| 1475 |
} |
| 1476 |
break;
|
| 1477 |
} |
| 1478 |
goto bad_reg;
|
| 1479 |
} |
| 1480 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
| 1481 |
switch (crm) {
|
| 1482 |
case 0: |
| 1483 |
break;
|
| 1484 |
case 1: /* Set TI925T configuration. */ |
| 1485 |
env->cp15.c15_ticonfig = val & 0xe7;
|
| 1486 |
env->cp15.c0_cpuid = (val & (1 << 5)) ? /* OS_TYPE bit */ |
| 1487 |
ARM_CPUID_TI915T : ARM_CPUID_TI925T; |
| 1488 |
break;
|
| 1489 |
case 2: /* Set I_max. */ |
| 1490 |
env->cp15.c15_i_max = val; |
| 1491 |
break;
|
| 1492 |
case 3: /* Set I_min. */ |
| 1493 |
env->cp15.c15_i_min = val; |
| 1494 |
break;
|
| 1495 |
case 4: /* Set thread-ID. */ |
| 1496 |
env->cp15.c15_threadid = val & 0xffff;
|
| 1497 |
break;
|
| 1498 |
case 8: /* Wait-for-interrupt (deprecated). */ |
| 1499 |
cpu_interrupt(env, CPU_INTERRUPT_HALT); |
| 1500 |
break;
|
| 1501 |
default:
|
| 1502 |
goto bad_reg;
|
| 1503 |
} |
| 1504 |
} |
| 1505 |
break;
|
| 1506 |
} |
| 1507 |
return;
|
| 1508 |
bad_reg:
|
| 1509 |
/* ??? For debugging only. Should raise illegal instruction exception. */
|
| 1510 |
cpu_abort(env, "Unimplemented cp15 register write (c%d, c%d, {%d, %d})\n",
|
| 1511 |
(insn >> 16) & 0xf, crm, op1, op2); |
| 1512 |
} |
| 1513 |
|
| 1514 |
uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn) |
| 1515 |
{
|
| 1516 |
int op1;
|
| 1517 |
int op2;
|
| 1518 |
int crm;
|
| 1519 |
|
| 1520 |
op1 = (insn >> 21) & 7; |
| 1521 |
op2 = (insn >> 5) & 7; |
| 1522 |
crm = insn & 0xf;
|
| 1523 |
switch ((insn >> 16) & 0xf) { |
| 1524 |
case 0: /* ID codes. */ |
| 1525 |
switch (op1) {
|
| 1526 |
case 0: |
| 1527 |
switch (crm) {
|
| 1528 |
case 0: |
| 1529 |
switch (op2) {
|
| 1530 |
case 0: /* Device ID. */ |
| 1531 |
return env->cp15.c0_cpuid;
|
| 1532 |
case 1: /* Cache Type. */ |
| 1533 |
return env->cp15.c0_cachetype;
|
| 1534 |
case 2: /* TCM status. */ |
| 1535 |
return 0; |
| 1536 |
case 3: /* TLB type register. */ |
| 1537 |
return 0; /* No lockable TLB entries. */ |
| 1538 |
case 5: /* CPU ID */ |
| 1539 |
return env->cpu_index;
|
| 1540 |
default:
|
| 1541 |
goto bad_reg;
|
| 1542 |
} |
| 1543 |
case 1: |
| 1544 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
| 1545 |
goto bad_reg;
|
| 1546 |
return env->cp15.c0_c1[op2];
|
| 1547 |
case 2: |
| 1548 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
| 1549 |
goto bad_reg;
|
| 1550 |
return env->cp15.c0_c2[op2];
|
| 1551 |
case 3: case 4: case 5: case 6: case 7: |
| 1552 |
return 0; |
| 1553 |
default:
|
| 1554 |
goto bad_reg;
|
| 1555 |
} |
| 1556 |
case 1: |
| 1557 |
/* These registers aren't documented on arm11 cores. However
|
| 1558 |
Linux looks at them anyway. */
|
| 1559 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
| 1560 |
goto bad_reg;
|
| 1561 |
if (crm != 0) |
| 1562 |
goto bad_reg;
|
| 1563 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
| 1564 |
goto bad_reg;
|
| 1565 |
return 0; |
| 1566 |
default:
|
| 1567 |
goto bad_reg;
|
| 1568 |
} |
| 1569 |
case 1: /* System configuration. */ |
| 1570 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1571 |
op2 = 0;
|
| 1572 |
switch (op2) {
|
| 1573 |
case 0: /* Control register. */ |
| 1574 |
return env->cp15.c1_sys;
|
| 1575 |
case 1: /* Auxiliary control register. */ |
| 1576 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
| 1577 |
return env->cp15.c1_xscaleauxcr;
|
| 1578 |
if (!arm_feature(env, ARM_FEATURE_AUXCR))
|
| 1579 |
goto bad_reg;
|
| 1580 |
switch (ARM_CPUID(env)) {
|
| 1581 |
case ARM_CPUID_ARM1026:
|
| 1582 |
return 1; |
| 1583 |
case ARM_CPUID_ARM1136:
|
| 1584 |
return 7; |
| 1585 |
case ARM_CPUID_ARM11MPCORE:
|
| 1586 |
return 1; |
| 1587 |
case ARM_CPUID_CORTEXA8:
|
| 1588 |
return 0; |
| 1589 |
default:
|
| 1590 |
goto bad_reg;
|
| 1591 |
} |
| 1592 |
case 2: /* Coprocessor access register. */ |
| 1593 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
| 1594 |
goto bad_reg;
|
| 1595 |
return env->cp15.c1_coproc;
|
| 1596 |
default:
|
| 1597 |
goto bad_reg;
|
| 1598 |
} |
| 1599 |
case 2: /* MMU Page table control / MPU cache control. */ |
| 1600 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
| 1601 |
switch (op2) {
|
| 1602 |
case 0: |
| 1603 |
return env->cp15.c2_data;
|
| 1604 |
break;
|
| 1605 |
case 1: |
| 1606 |
return env->cp15.c2_insn;
|
| 1607 |
break;
|
| 1608 |
default:
|
| 1609 |
goto bad_reg;
|
| 1610 |
} |
| 1611 |
} else {
|
| 1612 |
switch (op2) {
|
| 1613 |
case 0: |
| 1614 |
return env->cp15.c2_base0;
|
| 1615 |
case 1: |
| 1616 |
return env->cp15.c2_base1;
|
| 1617 |
case 2: |
| 1618 |
{
|
| 1619 |
int n;
|
| 1620 |
uint32_t mask; |
| 1621 |
n = 0;
|
| 1622 |
mask = env->cp15.c2_mask; |
| 1623 |
while (mask) {
|
| 1624 |
n++; |
| 1625 |
mask <<= 1;
|
| 1626 |
} |
| 1627 |
return n;
|
| 1628 |
} |
| 1629 |
default:
|
| 1630 |
goto bad_reg;
|
| 1631 |
} |
| 1632 |
} |
| 1633 |
case 3: /* MMU Domain access control / MPU write buffer control. */ |
| 1634 |
return env->cp15.c3;
|
| 1635 |
case 4: /* Reserved. */ |
| 1636 |
goto bad_reg;
|
| 1637 |
case 5: /* MMU Fault status / MPU access permission. */ |
| 1638 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1639 |
op2 = 0;
|
| 1640 |
switch (op2) {
|
| 1641 |
case 0: |
| 1642 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
| 1643 |
return simple_mpu_ap_bits(env->cp15.c5_data);
|
| 1644 |
return env->cp15.c5_data;
|
| 1645 |
case 1: |
| 1646 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
| 1647 |
return simple_mpu_ap_bits(env->cp15.c5_data);
|
| 1648 |
return env->cp15.c5_insn;
|
| 1649 |
case 2: |
| 1650 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
| 1651 |
goto bad_reg;
|
| 1652 |
return env->cp15.c5_data;
|
| 1653 |
case 3: |
| 1654 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
| 1655 |
goto bad_reg;
|
| 1656 |
return env->cp15.c5_insn;
|
| 1657 |
default:
|
| 1658 |
goto bad_reg;
|
| 1659 |
} |
| 1660 |
case 6: /* MMU Fault address. */ |
| 1661 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
| 1662 |
if (crm >= 8) |
| 1663 |
goto bad_reg;
|
| 1664 |
return env->cp15.c6_region[crm];
|
| 1665 |
} else {
|
| 1666 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1667 |
op2 = 0;
|
| 1668 |
switch (op2) {
|
| 1669 |
case 0: |
| 1670 |
return env->cp15.c6_data;
|
| 1671 |
case 1: |
| 1672 |
if (arm_feature(env, ARM_FEATURE_V6)) {
|
| 1673 |
/* Watchpoint Fault Adrress. */
|
| 1674 |
return 0; /* Not implemented. */ |
| 1675 |
} else {
|
| 1676 |
/* Instruction Fault Adrress. */
|
| 1677 |
/* Arm9 doesn't have an IFAR, but implementing it anyway
|
| 1678 |
shouldn't do any harm. */
|
| 1679 |
return env->cp15.c6_insn;
|
| 1680 |
} |
| 1681 |
case 2: |
| 1682 |
if (arm_feature(env, ARM_FEATURE_V6)) {
|
| 1683 |
/* Instruction Fault Adrress. */
|
| 1684 |
return env->cp15.c6_insn;
|
| 1685 |
} else {
|
| 1686 |
goto bad_reg;
|
| 1687 |
} |
| 1688 |
default:
|
| 1689 |
goto bad_reg;
|
| 1690 |
} |
| 1691 |
} |
| 1692 |
case 7: /* Cache control. */ |
| 1693 |
/* ??? This is for test, clean and invaidate operations that set the
|
| 1694 |
Z flag. We can't represent N = Z = 1, so it also clears
|
| 1695 |
the N flag. Oh well. */
|
| 1696 |
env->NZF = 0;
|
| 1697 |
return 0; |
| 1698 |
case 8: /* MMU TLB control. */ |
| 1699 |
goto bad_reg;
|
| 1700 |
case 9: /* Cache lockdown. */ |
| 1701 |
switch (op1) {
|
| 1702 |
case 0: /* L1 cache. */ |
| 1703 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
| 1704 |
return 0; |
| 1705 |
switch (op2) {
|
| 1706 |
case 0: |
| 1707 |
return env->cp15.c9_data;
|
| 1708 |
case 1: |
| 1709 |
return env->cp15.c9_insn;
|
| 1710 |
default:
|
| 1711 |
goto bad_reg;
|
| 1712 |
} |
| 1713 |
case 1: /* L2 cache */ |
| 1714 |
if (crm != 0) |
| 1715 |
goto bad_reg;
|
| 1716 |
/* L2 Lockdown and Auxiliary control. */
|
| 1717 |
return 0; |
| 1718 |
default:
|
| 1719 |
goto bad_reg;
|
| 1720 |
} |
| 1721 |
case 10: /* MMU TLB lockdown. */ |
| 1722 |
/* ??? TLB lockdown not implemented. */
|
| 1723 |
return 0; |
| 1724 |
case 11: /* TCM DMA control. */ |
| 1725 |
case 12: /* Reserved. */ |
| 1726 |
goto bad_reg;
|
| 1727 |
case 13: /* Process ID. */ |
| 1728 |
switch (op2) {
|
| 1729 |
case 0: |
| 1730 |
return env->cp15.c13_fcse;
|
| 1731 |
case 1: |
| 1732 |
return env->cp15.c13_context;
|
| 1733 |
case 2: |
| 1734 |
return env->cp15.c13_tls1;
|
| 1735 |
case 3: |
| 1736 |
return env->cp15.c13_tls2;
|
| 1737 |
case 4: |
| 1738 |
return env->cp15.c13_tls3;
|
| 1739 |
default:
|
| 1740 |
goto bad_reg;
|
| 1741 |
} |
| 1742 |
case 14: /* Reserved. */ |
| 1743 |
goto bad_reg;
|
| 1744 |
case 15: /* Implementation specific. */ |
| 1745 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
| 1746 |
if (op2 == 0 && crm == 1) |
| 1747 |
return env->cp15.c15_cpar;
|
| 1748 |
|
| 1749 |
goto bad_reg;
|
| 1750 |
} |
| 1751 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
| 1752 |
switch (crm) {
|
| 1753 |
case 0: |
| 1754 |
return 0; |
| 1755 |
case 1: /* Read TI925T configuration. */ |
| 1756 |
return env->cp15.c15_ticonfig;
|
| 1757 |
case 2: /* Read I_max. */ |
| 1758 |
return env->cp15.c15_i_max;
|
| 1759 |
case 3: /* Read I_min. */ |
| 1760 |
return env->cp15.c15_i_min;
|
| 1761 |
case 4: /* Read thread-ID. */ |
| 1762 |
return env->cp15.c15_threadid;
|
| 1763 |
case 8: /* TI925T_status */ |
| 1764 |
return 0; |
| 1765 |
} |
| 1766 |
goto bad_reg;
|
| 1767 |
} |
| 1768 |
return 0; |
| 1769 |
} |
| 1770 |
bad_reg:
|
| 1771 |
/* ??? For debugging only. Should raise illegal instruction exception. */
|
| 1772 |
cpu_abort(env, "Unimplemented cp15 register read (c%d, c%d, {%d, %d})\n",
|
| 1773 |
(insn >> 16) & 0xf, crm, op1, op2); |
| 1774 |
return 0; |
| 1775 |
} |
| 1776 |
|
| 1777 |
void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val)
|
| 1778 |
{
|
| 1779 |
env->banked_r13[bank_number(mode)] = val; |
| 1780 |
} |
| 1781 |
|
| 1782 |
uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode) |
| 1783 |
{
|
| 1784 |
return env->banked_r13[bank_number(mode)];
|
| 1785 |
} |
| 1786 |
|
| 1787 |
uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg) |
| 1788 |
{
|
| 1789 |
switch (reg) {
|
| 1790 |
case 0: /* APSR */ |
| 1791 |
return xpsr_read(env) & 0xf8000000; |
| 1792 |
case 1: /* IAPSR */ |
| 1793 |
return xpsr_read(env) & 0xf80001ff; |
| 1794 |
case 2: /* EAPSR */ |
| 1795 |
return xpsr_read(env) & 0xff00fc00; |
| 1796 |
case 3: /* xPSR */ |
| 1797 |
return xpsr_read(env) & 0xff00fdff; |
| 1798 |
case 5: /* IPSR */ |
| 1799 |
return xpsr_read(env) & 0x000001ff; |
| 1800 |
case 6: /* EPSR */ |
| 1801 |
return xpsr_read(env) & 0x0700fc00; |
| 1802 |
case 7: /* IEPSR */ |
| 1803 |
return xpsr_read(env) & 0x0700edff; |
| 1804 |
case 8: /* MSP */ |
| 1805 |
return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13]; |
| 1806 |
case 9: /* PSP */ |
| 1807 |
return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp; |
| 1808 |
case 16: /* PRIMASK */ |
| 1809 |
return (env->uncached_cpsr & CPSR_I) != 0; |
| 1810 |
case 17: /* FAULTMASK */ |
| 1811 |
return (env->uncached_cpsr & CPSR_F) != 0; |
| 1812 |
case 18: /* BASEPRI */ |
| 1813 |
case 19: /* BASEPRI_MAX */ |
| 1814 |
return env->v7m.basepri;
|
| 1815 |
case 20: /* CONTROL */ |
| 1816 |
return env->v7m.control;
|
| 1817 |
default:
|
| 1818 |
/* ??? For debugging only. */
|
| 1819 |
cpu_abort(env, "Unimplemented system register read (%d)\n", reg);
|
| 1820 |
return 0; |
| 1821 |
} |
| 1822 |
} |
| 1823 |
|
| 1824 |
void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val)
|
| 1825 |
{
|
| 1826 |
switch (reg) {
|
| 1827 |
case 0: /* APSR */ |
| 1828 |
xpsr_write(env, val, 0xf8000000);
|
| 1829 |
break;
|
| 1830 |
case 1: /* IAPSR */ |
| 1831 |
xpsr_write(env, val, 0xf8000000);
|
| 1832 |
break;
|
| 1833 |
case 2: /* EAPSR */ |
| 1834 |
xpsr_write(env, val, 0xfe00fc00);
|
| 1835 |
break;
|
| 1836 |
case 3: /* xPSR */ |
| 1837 |
xpsr_write(env, val, 0xfe00fc00);
|
| 1838 |
break;
|
| 1839 |
case 5: /* IPSR */ |
| 1840 |
/* IPSR bits are readonly. */
|
| 1841 |
break;
|
| 1842 |
case 6: /* EPSR */ |
| 1843 |
xpsr_write(env, val, 0x0600fc00);
|
| 1844 |
break;
|
| 1845 |
case 7: /* IEPSR */ |
| 1846 |
xpsr_write(env, val, 0x0600fc00);
|
| 1847 |
break;
|
| 1848 |
case 8: /* MSP */ |
| 1849 |
if (env->v7m.current_sp)
|
| 1850 |
env->v7m.other_sp = val; |
| 1851 |
else
|
| 1852 |
env->regs[13] = val;
|
| 1853 |
break;
|
| 1854 |
case 9: /* PSP */ |
| 1855 |
if (env->v7m.current_sp)
|
| 1856 |
env->regs[13] = val;
|
| 1857 |
else
|
| 1858 |
env->v7m.other_sp = val; |
| 1859 |
break;
|
| 1860 |
case 16: /* PRIMASK */ |
| 1861 |
if (val & 1) |
| 1862 |
env->uncached_cpsr |= CPSR_I; |
| 1863 |
else
|
| 1864 |
env->uncached_cpsr &= ~CPSR_I; |
| 1865 |
break;
|
| 1866 |
case 17: /* FAULTMASK */ |
| 1867 |
if (val & 1) |
| 1868 |
env->uncached_cpsr |= CPSR_F; |
| 1869 |
else
|
| 1870 |
env->uncached_cpsr &= ~CPSR_F; |
| 1871 |
break;
|
| 1872 |
case 18: /* BASEPRI */ |
| 1873 |
env->v7m.basepri = val & 0xff;
|
| 1874 |
break;
|
| 1875 |
case 19: /* BASEPRI_MAX */ |
| 1876 |
val &= 0xff;
|
| 1877 |
if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0)) |
| 1878 |
env->v7m.basepri = val; |
| 1879 |
break;
|
| 1880 |
case 20: /* CONTROL */ |
| 1881 |
env->v7m.control = val & 3;
|
| 1882 |
switch_v7m_sp(env, (val & 2) != 0); |
| 1883 |
break;
|
| 1884 |
default:
|
| 1885 |
/* ??? For debugging only. */
|
| 1886 |
cpu_abort(env, "Unimplemented system register write (%d)\n", reg);
|
| 1887 |
return;
|
| 1888 |
} |
| 1889 |
} |
| 1890 |
|
| 1891 |
void cpu_arm_set_cp_io(CPUARMState *env, int cpnum, |
| 1892 |
ARMReadCPFunc *cp_read, ARMWriteCPFunc *cp_write, |
| 1893 |
void *opaque)
|
| 1894 |
{
|
| 1895 |
if (cpnum < 0 || cpnum > 14) { |
| 1896 |
cpu_abort(env, "Bad coprocessor number: %i\n", cpnum);
|
| 1897 |
return;
|
| 1898 |
} |
| 1899 |
|
| 1900 |
env->cp[cpnum].cp_read = cp_read; |
| 1901 |
env->cp[cpnum].cp_write = cp_write; |
| 1902 |
env->cp[cpnum].opaque = opaque; |
| 1903 |
} |
| 1904 |
|
| 1905 |
#endif
|
| 1906 |
|
| 1907 |
/* Note that signed overflow is undefined in C. The following routines are
|
| 1908 |
careful to use unsigned types where modulo arithmetic is required.
|
| 1909 |
Failure to do so _will_ break on newer gcc. */
|
| 1910 |
|
| 1911 |
/* Signed saturating arithmetic. */
|
| 1912 |
|
| 1913 |
/* Perform 16-bit signed satruating addition. */
|
| 1914 |
static inline uint16_t add16_sat(uint16_t a, uint16_t b) |
| 1915 |
{
|
| 1916 |
uint16_t res; |
| 1917 |
|
| 1918 |
res = a + b; |
| 1919 |
if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) { |
| 1920 |
if (a & 0x8000) |
| 1921 |
res = 0x8000;
|
| 1922 |
else
|
| 1923 |
res = 0x7fff;
|
| 1924 |
} |
| 1925 |
return res;
|
| 1926 |
} |
| 1927 |
|
| 1928 |
/* Perform 8-bit signed satruating addition. */
|
| 1929 |
static inline uint8_t add8_sat(uint8_t a, uint8_t b) |
| 1930 |
{
|
| 1931 |
uint8_t res; |
| 1932 |
|
| 1933 |
res = a + b; |
| 1934 |
if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) { |
| 1935 |
if (a & 0x80) |
| 1936 |
res = 0x80;
|
| 1937 |
else
|
| 1938 |
res = 0x7f;
|
| 1939 |
} |
| 1940 |
return res;
|
| 1941 |
} |
| 1942 |
|
| 1943 |
/* Perform 16-bit signed satruating subtraction. */
|
| 1944 |
static inline uint16_t sub16_sat(uint16_t a, uint16_t b) |
| 1945 |
{
|
| 1946 |
uint16_t res; |
| 1947 |
|
| 1948 |
res = a - b; |
| 1949 |
if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) { |
| 1950 |
if (a & 0x8000) |
| 1951 |
res = 0x8000;
|
| 1952 |
else
|
| 1953 |
res = 0x7fff;
|
| 1954 |
} |
| 1955 |
return res;
|
| 1956 |
} |
| 1957 |
|
| 1958 |
/* Perform 8-bit signed satruating subtraction. */
|
| 1959 |
static inline uint8_t sub8_sat(uint8_t a, uint8_t b) |
| 1960 |
{
|
| 1961 |
uint8_t res; |
| 1962 |
|
| 1963 |
res = a - b; |
| 1964 |
if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) { |
| 1965 |
if (a & 0x80) |
| 1966 |
res = 0x80;
|
| 1967 |
else
|
| 1968 |
res = 0x7f;
|
| 1969 |
} |
| 1970 |
return res;
|
| 1971 |
} |
| 1972 |
|
| 1973 |
#define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16); |
| 1974 |
#define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16); |
| 1975 |
#define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8); |
| 1976 |
#define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8); |
| 1977 |
#define PFX q
|
| 1978 |
|
| 1979 |
#include "op_addsub.h" |
| 1980 |
|
| 1981 |
/* Unsigned saturating arithmetic. */
|
| 1982 |
static inline uint16_t add16_usat(uint16_t a, uint8_t b) |
| 1983 |
{
|
| 1984 |
uint16_t res; |
| 1985 |
res = a + b; |
| 1986 |
if (res < a)
|
| 1987 |
res = 0xffff;
|
| 1988 |
return res;
|
| 1989 |
} |
| 1990 |
|
| 1991 |
static inline uint16_t sub16_usat(uint16_t a, uint8_t b) |
| 1992 |
{
|
| 1993 |
if (a < b)
|
| 1994 |
return a - b;
|
| 1995 |
else
|
| 1996 |
return 0; |
| 1997 |
} |
| 1998 |
|
| 1999 |
static inline uint8_t add8_usat(uint8_t a, uint8_t b) |
| 2000 |
{
|
| 2001 |
uint8_t res; |
| 2002 |
res = a + b; |
| 2003 |
if (res < a)
|
| 2004 |
res = 0xff;
|
| 2005 |
return res;
|
| 2006 |
} |
| 2007 |
|
| 2008 |
static inline uint8_t sub8_usat(uint8_t a, uint8_t b) |
| 2009 |
{
|
| 2010 |
if (a < b)
|
| 2011 |
return a - b;
|
| 2012 |
else
|
| 2013 |
return 0; |
| 2014 |
} |
| 2015 |
|
| 2016 |
#define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16); |
| 2017 |
#define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16); |
| 2018 |
#define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8); |
| 2019 |
#define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8); |
| 2020 |
#define PFX uq
|
| 2021 |
|
| 2022 |
#include "op_addsub.h" |
| 2023 |
|
| 2024 |
/* Signed modulo arithmetic. */
|
| 2025 |
#define SARITH16(a, b, n, op) do { \ |
| 2026 |
int32_t sum; \ |
| 2027 |
sum = (int16_t)((uint16_t)(a) op (uint16_t)(b)); \ |
| 2028 |
RESULT(sum, n, 16); \
|
| 2029 |
if (sum >= 0) \ |
| 2030 |
ge |= 3 << (n * 2); \ |
| 2031 |
} while(0) |
| 2032 |
|
| 2033 |
#define SARITH8(a, b, n, op) do { \ |
| 2034 |
int32_t sum; \ |
| 2035 |
sum = (int8_t)((uint8_t)(a) op (uint8_t)(b)); \ |
| 2036 |
RESULT(sum, n, 8); \
|
| 2037 |
if (sum >= 0) \ |
| 2038 |
ge |= 1 << n; \
|
| 2039 |
} while(0) |
| 2040 |
|
| 2041 |
|
| 2042 |
#define ADD16(a, b, n) SARITH16(a, b, n, +)
|
| 2043 |
#define SUB16(a, b, n) SARITH16(a, b, n, -)
|
| 2044 |
#define ADD8(a, b, n) SARITH8(a, b, n, +)
|
| 2045 |
#define SUB8(a, b, n) SARITH8(a, b, n, -)
|
| 2046 |
#define PFX s
|
| 2047 |
#define ARITH_GE
|
| 2048 |
|
| 2049 |
#include "op_addsub.h" |
| 2050 |
|
| 2051 |
/* Unsigned modulo arithmetic. */
|
| 2052 |
#define ADD16(a, b, n) do { \ |
| 2053 |
uint32_t sum; \ |
| 2054 |
sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \ |
| 2055 |
RESULT(sum, n, 16); \
|
| 2056 |
if ((sum >> 16) == 0) \ |
| 2057 |
ge |= 3 << (n * 2); \ |
| 2058 |
} while(0) |
| 2059 |
|
| 2060 |
#define ADD8(a, b, n) do { \ |
| 2061 |
uint32_t sum; \ |
| 2062 |
sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \ |
| 2063 |
RESULT(sum, n, 8); \
|
| 2064 |
if ((sum >> 8) == 0) \ |
| 2065 |
ge |= 3 << (n * 2); \ |
| 2066 |
} while(0) |
| 2067 |
|
| 2068 |
#define SUB16(a, b, n) do { \ |
| 2069 |
uint32_t sum; \ |
| 2070 |
sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \ |
| 2071 |
RESULT(sum, n, 16); \
|
| 2072 |
if ((sum >> 16) == 0) \ |
| 2073 |
ge |= 3 << (n * 2); \ |
| 2074 |
} while(0) |
| 2075 |
|
| 2076 |
#define SUB8(a, b, n) do { \ |
| 2077 |
uint32_t sum; \ |
| 2078 |
sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \ |
| 2079 |
RESULT(sum, n, 8); \
|
| 2080 |
if ((sum >> 8) == 0) \ |
| 2081 |
ge |= 3 << (n * 2); \ |
| 2082 |
} while(0) |
| 2083 |
|
| 2084 |
#define PFX u
|
| 2085 |
#define ARITH_GE
|
| 2086 |
|
| 2087 |
#include "op_addsub.h" |
| 2088 |
|
| 2089 |
/* Halved signed arithmetic. */
|
| 2090 |
#define ADD16(a, b, n) \
|
| 2091 |
RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16) |
| 2092 |
#define SUB16(a, b, n) \
|
| 2093 |
RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16) |
| 2094 |
#define ADD8(a, b, n) \
|
| 2095 |
RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8) |
| 2096 |
#define SUB8(a, b, n) \
|
| 2097 |
RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8) |
| 2098 |
#define PFX sh
|
| 2099 |
|
| 2100 |
#include "op_addsub.h" |
| 2101 |
|
| 2102 |
/* Halved unsigned arithmetic. */
|
| 2103 |
#define ADD16(a, b, n) \
|
| 2104 |
RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16) |
| 2105 |
#define SUB16(a, b, n) \
|
| 2106 |
RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16) |
| 2107 |
#define ADD8(a, b, n) \
|
| 2108 |
RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8) |
| 2109 |
#define SUB8(a, b, n) \
|
| 2110 |
RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8) |
| 2111 |
#define PFX uh
|
| 2112 |
|
| 2113 |
#include "op_addsub.h" |
| 2114 |
|
| 2115 |
static inline uint8_t do_usad(uint8_t a, uint8_t b) |
| 2116 |
{
|
| 2117 |
if (a > b)
|
| 2118 |
return a - b;
|
| 2119 |
else
|
| 2120 |
return b - a;
|
| 2121 |
} |
| 2122 |
|
| 2123 |
/* Unsigned sum of absolute byte differences. */
|
| 2124 |
uint32_t HELPER(usad8)(uint32_t a, uint32_t b) |
| 2125 |
{
|
| 2126 |
uint32_t sum; |
| 2127 |
sum = do_usad(a, b); |
| 2128 |
sum += do_usad(a >> 8, b >> 8); |
| 2129 |
sum += do_usad(a >> 16, b >>16); |
| 2130 |
sum += do_usad(a >> 24, b >> 24); |
| 2131 |
return sum;
|
| 2132 |
} |
| 2133 |
|
| 2134 |
/* For ARMv6 SEL instruction. */
|
| 2135 |
uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b) |
| 2136 |
{
|
| 2137 |
uint32_t mask; |
| 2138 |
|
| 2139 |
mask = 0;
|
| 2140 |
if (flags & 1) |
| 2141 |
mask |= 0xff;
|
| 2142 |
if (flags & 2) |
| 2143 |
mask |= 0xff00;
|
| 2144 |
if (flags & 4) |
| 2145 |
mask |= 0xff0000;
|
| 2146 |
if (flags & 8) |
| 2147 |
mask |= 0xff000000;
|
| 2148 |
return (a & mask) | (b & ~mask);
|
| 2149 |
} |
| 2150 |
|
| 2151 |
uint32_t HELPER(logicq_cc)(uint64_t val) |
| 2152 |
{
|
| 2153 |
return (val >> 32) | (val != 0); |
| 2154 |
} |
| 2155 |
|
| 2156 |
/* VFP support. We follow the convention used for VFP instrunctions:
|
| 2157 |
Single precition routines have a "s" suffix, double precision a
|
| 2158 |
"d" suffix. */
|
| 2159 |
|
| 2160 |
/* Convert host exception flags to vfp form. */
|
| 2161 |
static inline int vfp_exceptbits_from_host(int host_bits) |
| 2162 |
{
|
| 2163 |
int target_bits = 0; |
| 2164 |
|
| 2165 |
if (host_bits & float_flag_invalid)
|
| 2166 |
target_bits |= 1;
|
| 2167 |
if (host_bits & float_flag_divbyzero)
|
| 2168 |
target_bits |= 2;
|
| 2169 |
if (host_bits & float_flag_overflow)
|
| 2170 |
target_bits |= 4;
|
| 2171 |
if (host_bits & float_flag_underflow)
|
| 2172 |
target_bits |= 8;
|
| 2173 |
if (host_bits & float_flag_inexact)
|
| 2174 |
target_bits |= 0x10;
|
| 2175 |
return target_bits;
|
| 2176 |
} |
| 2177 |
|
| 2178 |
uint32_t HELPER(vfp_get_fpscr)(CPUState *env) |
| 2179 |
{
|
| 2180 |
int i;
|
| 2181 |
uint32_t fpscr; |
| 2182 |
|
| 2183 |
fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
|
| 2184 |
| (env->vfp.vec_len << 16)
|
| 2185 |
| (env->vfp.vec_stride << 20);
|
| 2186 |
i = get_float_exception_flags(&env->vfp.fp_status); |
| 2187 |
fpscr |= vfp_exceptbits_from_host(i); |
| 2188 |
return fpscr;
|
| 2189 |
} |
| 2190 |
|
| 2191 |
/* Convert vfp exception flags to target form. */
|
| 2192 |
static inline int vfp_exceptbits_to_host(int target_bits) |
| 2193 |
{
|
| 2194 |
int host_bits = 0; |
| 2195 |
|
| 2196 |
if (target_bits & 1) |
| 2197 |
host_bits |= float_flag_invalid; |
| 2198 |
if (target_bits & 2) |
| 2199 |
host_bits |= float_flag_divbyzero; |
| 2200 |
if (target_bits & 4) |
| 2201 |
host_bits |= float_flag_overflow; |
| 2202 |
if (target_bits & 8) |
| 2203 |
host_bits |= float_flag_underflow; |
| 2204 |
if (target_bits & 0x10) |
| 2205 |
host_bits |= float_flag_inexact; |
| 2206 |
return host_bits;
|
| 2207 |
} |
| 2208 |
|
| 2209 |
void HELPER(vfp_set_fpscr)(CPUState *env, uint32_t val)
|
| 2210 |
{
|
| 2211 |
int i;
|
| 2212 |
uint32_t changed; |
| 2213 |
|
| 2214 |
changed = env->vfp.xregs[ARM_VFP_FPSCR]; |
| 2215 |
env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
|
| 2216 |
env->vfp.vec_len = (val >> 16) & 7; |
| 2217 |
env->vfp.vec_stride = (val >> 20) & 3; |
| 2218 |
|
| 2219 |
changed ^= val; |
| 2220 |
if (changed & (3 << 22)) { |
| 2221 |
i = (val >> 22) & 3; |
| 2222 |
switch (i) {
|
| 2223 |
case 0: |
| 2224 |
i = float_round_nearest_even; |
| 2225 |
break;
|
| 2226 |
case 1: |
| 2227 |
i = float_round_up; |
| 2228 |
break;
|
| 2229 |
case 2: |
| 2230 |
i = float_round_down; |
| 2231 |
break;
|
| 2232 |
case 3: |
| 2233 |
i = float_round_to_zero; |
| 2234 |
break;
|
| 2235 |
} |
| 2236 |
set_float_rounding_mode(i, &env->vfp.fp_status); |
| 2237 |
} |
| 2238 |
|
| 2239 |
i = vfp_exceptbits_to_host((val >> 8) & 0x1f); |
| 2240 |
set_float_exception_flags(i, &env->vfp.fp_status); |
| 2241 |
/* XXX: FZ and DN are not implemented. */
|
| 2242 |
} |
| 2243 |
|
| 2244 |
#define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
|
| 2245 |
|
| 2246 |
#define VFP_BINOP(name) \
|
| 2247 |
float32 VFP_HELPER(name, s)(float32 a, float32 b, CPUState *env) \ |
| 2248 |
{ \
|
| 2249 |
return float32_ ## name (a, b, &env->vfp.fp_status); \ |
| 2250 |
} \ |
| 2251 |
float64 VFP_HELPER(name, d)(float64 a, float64 b, CPUState *env) \ |
| 2252 |
{ \
|
| 2253 |
return float64_ ## name (a, b, &env->vfp.fp_status); \ |
| 2254 |
} |
| 2255 |
VFP_BINOP(add) |
| 2256 |
VFP_BINOP(sub) |
| 2257 |
VFP_BINOP(mul) |
| 2258 |
VFP_BINOP(div) |
| 2259 |
#undef VFP_BINOP
|
| 2260 |
|
| 2261 |
float32 VFP_HELPER(neg, s)(float32 a) |
| 2262 |
{
|
| 2263 |
return float32_chs(a);
|
| 2264 |
} |
| 2265 |
|
| 2266 |
float64 VFP_HELPER(neg, d)(float64 a) |
| 2267 |
{
|
| 2268 |
return float32_chs(a);
|
| 2269 |
} |
| 2270 |
|
| 2271 |
float32 VFP_HELPER(abs, s)(float32 a) |
| 2272 |
{
|
| 2273 |
return float32_abs(a);
|
| 2274 |
} |
| 2275 |
|
| 2276 |
float64 VFP_HELPER(abs, d)(float64 a) |
| 2277 |
{
|
| 2278 |
return float32_abs(a);
|
| 2279 |
} |
| 2280 |
|
| 2281 |
float32 VFP_HELPER(sqrt, s)(float32 a, CPUState *env) |
| 2282 |
{
|
| 2283 |
return float32_sqrt(a, &env->vfp.fp_status);
|
| 2284 |
} |
| 2285 |
|
| 2286 |
float64 VFP_HELPER(sqrt, d)(float64 a, CPUState *env) |
| 2287 |
{
|
| 2288 |
return float64_sqrt(a, &env->vfp.fp_status);
|
| 2289 |
} |
| 2290 |
|
| 2291 |
/* XXX: check quiet/signaling case */
|
| 2292 |
#define DO_VFP_cmp(p, type) \
|
| 2293 |
void VFP_HELPER(cmp, p)(type a, type b, CPUState *env) \
|
| 2294 |
{ \
|
| 2295 |
uint32_t flags; \ |
| 2296 |
switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \ |
| 2297 |
case 0: flags = 0x6; break; \ |
| 2298 |
case -1: flags = 0x8; break; \ |
| 2299 |
case 1: flags = 0x2; break; \ |
| 2300 |
default: case 2: flags = 0x3; break; \ |
| 2301 |
} \ |
| 2302 |
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
|
| 2303 |
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
|
| 2304 |
} \ |
| 2305 |
void VFP_HELPER(cmpe, p)(type a, type b, CPUState *env) \
|
| 2306 |
{ \
|
| 2307 |
uint32_t flags; \ |
| 2308 |
switch(type ## _compare(a, b, &env->vfp.fp_status)) { \ |
| 2309 |
case 0: flags = 0x6; break; \ |
| 2310 |
case -1: flags = 0x8; break; \ |
| 2311 |
case 1: flags = 0x2; break; \ |
| 2312 |
default: case 2: flags = 0x3; break; \ |
| 2313 |
} \ |
| 2314 |
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
|
| 2315 |
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
|
| 2316 |
} |
| 2317 |
DO_VFP_cmp(s, float32) |
| 2318 |
DO_VFP_cmp(d, float64) |
| 2319 |
#undef DO_VFP_cmp
|
| 2320 |
|
| 2321 |
/* Helper routines to perform bitwise copies between float and int. */
|
| 2322 |
static inline float32 vfp_itos(uint32_t i) |
| 2323 |
{
|
| 2324 |
union {
|
| 2325 |
uint32_t i; |
| 2326 |
float32 s; |
| 2327 |
} v; |
| 2328 |
|
| 2329 |
v.i = i; |
| 2330 |
return v.s;
|
| 2331 |
} |
| 2332 |
|
| 2333 |
static inline uint32_t vfp_stoi(float32 s) |
| 2334 |
{
|
| 2335 |
union {
|
| 2336 |
uint32_t i; |
| 2337 |
float32 s; |
| 2338 |
} v; |
| 2339 |
|
| 2340 |
v.s = s; |
| 2341 |
return v.i;
|
| 2342 |
} |
| 2343 |
|
| 2344 |
static inline float64 vfp_itod(uint64_t i) |
| 2345 |
{
|
| 2346 |
union {
|
| 2347 |
uint64_t i; |
| 2348 |
float64 d; |
| 2349 |
} v; |
| 2350 |
|
| 2351 |
v.i = i; |
| 2352 |
return v.d;
|
| 2353 |
} |
| 2354 |
|
| 2355 |
static inline uint64_t vfp_dtoi(float64 d) |
| 2356 |
{
|
| 2357 |
union {
|
| 2358 |
uint64_t i; |
| 2359 |
float64 d; |
| 2360 |
} v; |
| 2361 |
|
| 2362 |
v.d = d; |
| 2363 |
return v.i;
|
| 2364 |
} |
| 2365 |
|
| 2366 |
/* Integer to float conversion. */
|
| 2367 |
float32 VFP_HELPER(uito, s)(float32 x, CPUState *env) |
| 2368 |
{
|
| 2369 |
return uint32_to_float32(vfp_stoi(x), &env->vfp.fp_status);
|
| 2370 |
} |
| 2371 |
|
| 2372 |
float64 VFP_HELPER(uito, d)(float32 x, CPUState *env) |
| 2373 |
{
|
| 2374 |
return uint32_to_float64(vfp_stoi(x), &env->vfp.fp_status);
|
| 2375 |
} |
| 2376 |
|
| 2377 |
float32 VFP_HELPER(sito, s)(float32 x, CPUState *env) |
| 2378 |
{
|
| 2379 |
return int32_to_float32(vfp_stoi(x), &env->vfp.fp_status);
|
| 2380 |
} |
| 2381 |
|
| 2382 |
float64 VFP_HELPER(sito, d)(float32 x, CPUState *env) |
| 2383 |
{
|
| 2384 |
return int32_to_float64(vfp_stoi(x), &env->vfp.fp_status);
|
| 2385 |
} |
| 2386 |
|
| 2387 |
/* Float to integer conversion. */
|
| 2388 |
float32 VFP_HELPER(toui, s)(float32 x, CPUState *env) |
| 2389 |
{
|
| 2390 |
return vfp_itos(float32_to_uint32(x, &env->vfp.fp_status));
|
| 2391 |
} |
| 2392 |
|
| 2393 |
float32 VFP_HELPER(toui, d)(float64 x, CPUState *env) |
| 2394 |
{
|
| 2395 |
return vfp_itos(float64_to_uint32(x, &env->vfp.fp_status));
|
| 2396 |
} |
| 2397 |
|
| 2398 |
float32 VFP_HELPER(tosi, s)(float32 x, CPUState *env) |
| 2399 |
{
|
| 2400 |
return vfp_itos(float32_to_int32(x, &env->vfp.fp_status));
|
| 2401 |
} |
| 2402 |
|
| 2403 |
float32 VFP_HELPER(tosi, d)(float64 x, CPUState *env) |
| 2404 |
{
|
| 2405 |
return vfp_itos(float64_to_int32(x, &env->vfp.fp_status));
|
| 2406 |
} |
| 2407 |
|
| 2408 |
float32 VFP_HELPER(touiz, s)(float32 x, CPUState *env) |
| 2409 |
{
|
| 2410 |
return vfp_itos(float32_to_uint32_round_to_zero(x, &env->vfp.fp_status));
|
| 2411 |
} |
| 2412 |
|
| 2413 |
float32 VFP_HELPER(touiz, d)(float64 x, CPUState *env) |
| 2414 |
{
|
| 2415 |
return vfp_itos(float64_to_uint32_round_to_zero(x, &env->vfp.fp_status));
|
| 2416 |
} |
| 2417 |
|
| 2418 |
float32 VFP_HELPER(tosiz, s)(float32 x, CPUState *env) |
| 2419 |
{
|
| 2420 |
return vfp_itos(float32_to_int32_round_to_zero(x, &env->vfp.fp_status));
|
| 2421 |
} |
| 2422 |
|
| 2423 |
float32 VFP_HELPER(tosiz, d)(float64 x, CPUState *env) |
| 2424 |
{
|
| 2425 |
return vfp_itos(float64_to_int32_round_to_zero(x, &env->vfp.fp_status));
|
| 2426 |
} |
| 2427 |
|
| 2428 |
/* floating point conversion */
|
| 2429 |
float64 VFP_HELPER(fcvtd, s)(float32 x, CPUState *env) |
| 2430 |
{
|
| 2431 |
return float32_to_float64(x, &env->vfp.fp_status);
|
| 2432 |
} |
| 2433 |
|
| 2434 |
float32 VFP_HELPER(fcvts, d)(float64 x, CPUState *env) |
| 2435 |
{
|
| 2436 |
return float64_to_float32(x, &env->vfp.fp_status);
|
| 2437 |
} |
| 2438 |
|
| 2439 |
/* VFP3 fixed point conversion. */
|
| 2440 |
#define VFP_CONV_FIX(name, p, ftype, itype, sign) \
|
| 2441 |
ftype VFP_HELPER(name##to, p)(ftype x, uint32_t shift, CPUState *env) \ |
| 2442 |
{ \
|
| 2443 |
ftype tmp; \ |
| 2444 |
tmp = sign##int32_to_##ftype ((itype)vfp_##p##toi(x), \ |
| 2445 |
&env->vfp.fp_status); \ |
| 2446 |
return ftype##_scalbn(tmp, shift, &env->vfp.fp_status); \ |
| 2447 |
} \ |
| 2448 |
ftype VFP_HELPER(to##name, p)(ftype x, uint32_t shift, CPUState *env) \ |
| 2449 |
{ \
|
| 2450 |
ftype tmp; \ |
| 2451 |
tmp = ftype##_scalbn(x, shift, &env->vfp.fp_status); \ |
| 2452 |
return vfp_ito##p((itype)ftype##_to_##sign##int32_round_to_zero(tmp, \ |
| 2453 |
&env->vfp.fp_status)); \ |
| 2454 |
} |
| 2455 |
|
| 2456 |
VFP_CONV_FIX(sh, d, float64, int16, ) |
| 2457 |
VFP_CONV_FIX(sl, d, float64, int32, ) |
| 2458 |
VFP_CONV_FIX(uh, d, float64, uint16, u) |
| 2459 |
VFP_CONV_FIX(ul, d, float64, uint32, u) |
| 2460 |
VFP_CONV_FIX(sh, s, float32, int16, ) |
| 2461 |
VFP_CONV_FIX(sl, s, float32, int32, ) |
| 2462 |
VFP_CONV_FIX(uh, s, float32, uint16, u) |
| 2463 |
VFP_CONV_FIX(ul, s, float32, uint32, u) |
| 2464 |
#undef VFP_CONV_FIX
|
| 2465 |
|
| 2466 |
float32 HELPER(recps_f32)(float32 a, float32 b, CPUState *env) |
| 2467 |
{
|
| 2468 |
float_status *s = &env->vfp.fp_status; |
| 2469 |
float32 two = int32_to_float32(2, s);
|
| 2470 |
return float32_sub(two, float32_mul(a, b, s), s);
|
| 2471 |
} |
| 2472 |
|
| 2473 |
float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUState *env) |
| 2474 |
{
|
| 2475 |
float_status *s = &env->vfp.fp_status; |
| 2476 |
float32 three = int32_to_float32(3, s);
|
| 2477 |
return float32_sub(three, float32_mul(a, b, s), s);
|
| 2478 |
} |
| 2479 |
|
| 2480 |
/* NEON helpers. */
|
| 2481 |
|
| 2482 |
/* TODO: The architecture specifies the value that the estimate functions
|
| 2483 |
should return. We return the exact reciprocal/root instead. */
|
| 2484 |
float32 HELPER(recpe_f32)(float32 a, CPUState *env) |
| 2485 |
{
|
| 2486 |
float_status *s = &env->vfp.fp_status; |
| 2487 |
float32 one = int32_to_float32(1, s);
|
| 2488 |
return float32_div(one, a, s);
|
| 2489 |
} |
| 2490 |
|
| 2491 |
float32 HELPER(rsqrte_f32)(float32 a, CPUState *env) |
| 2492 |
{
|
| 2493 |
float_status *s = &env->vfp.fp_status; |
| 2494 |
float32 one = int32_to_float32(1, s);
|
| 2495 |
return float32_div(one, float32_sqrt(a, s), s);
|
| 2496 |
} |
| 2497 |
|
| 2498 |
uint32_t HELPER(recpe_u32)(uint32_t a, CPUState *env) |
| 2499 |
{
|
| 2500 |
float_status *s = &env->vfp.fp_status; |
| 2501 |
float32 tmp; |
| 2502 |
tmp = int32_to_float32(a, s); |
| 2503 |
tmp = float32_scalbn(tmp, -32, s);
|
| 2504 |
tmp = helper_recpe_f32(tmp, env); |
| 2505 |
tmp = float32_scalbn(tmp, 31, s);
|
| 2506 |
return float32_to_int32(tmp, s);
|
| 2507 |
} |
| 2508 |
|
| 2509 |
uint32_t HELPER(rsqrte_u32)(uint32_t a, CPUState *env) |
| 2510 |
{
|
| 2511 |
float_status *s = &env->vfp.fp_status; |
| 2512 |
float32 tmp; |
| 2513 |
tmp = int32_to_float32(a, s); |
| 2514 |
tmp = float32_scalbn(tmp, -32, s);
|
| 2515 |
tmp = helper_rsqrte_f32(tmp, env); |
| 2516 |
tmp = float32_scalbn(tmp, 31, s);
|
| 2517 |
return float32_to_int32(tmp, s);
|
| 2518 |
} |