root / exec.c @ ef845c3b
History | View | Annotate | Download (109.5 kB)
| 1 |
/*
|
|---|---|
| 2 |
* virtual page mapping and translated block handling
|
| 3 |
*
|
| 4 |
* Copyright (c) 2003 Fabrice Bellard
|
| 5 |
*
|
| 6 |
* This library is free software; you can redistribute it and/or
|
| 7 |
* modify it under the terms of the GNU Lesser General Public
|
| 8 |
* License as published by the Free Software Foundation; either
|
| 9 |
* version 2 of the License, or (at your option) any later version.
|
| 10 |
*
|
| 11 |
* This library is distributed in the hope that it will be useful,
|
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
| 14 |
* Lesser General Public License for more details.
|
| 15 |
*
|
| 16 |
* You should have received a copy of the GNU Lesser General Public
|
| 17 |
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
| 18 |
*/
|
| 19 |
#include "config.h" |
| 20 |
#ifdef _WIN32
|
| 21 |
#include <windows.h> |
| 22 |
#else
|
| 23 |
#include <sys/types.h> |
| 24 |
#include <sys/mman.h> |
| 25 |
#endif
|
| 26 |
#include <stdlib.h> |
| 27 |
#include <stdio.h> |
| 28 |
#include <stdarg.h> |
| 29 |
#include <string.h> |
| 30 |
#include <errno.h> |
| 31 |
#include <unistd.h> |
| 32 |
#include <inttypes.h> |
| 33 |
|
| 34 |
#include "cpu.h" |
| 35 |
#include "exec-all.h" |
| 36 |
#include "qemu-common.h" |
| 37 |
#include "tcg.h" |
| 38 |
#include "hw/hw.h" |
| 39 |
#include "osdep.h" |
| 40 |
#include "kvm.h" |
| 41 |
#if defined(CONFIG_USER_ONLY)
|
| 42 |
#include <qemu.h> |
| 43 |
#endif
|
| 44 |
|
| 45 |
//#define DEBUG_TB_INVALIDATE
|
| 46 |
//#define DEBUG_FLUSH
|
| 47 |
//#define DEBUG_TLB
|
| 48 |
//#define DEBUG_UNASSIGNED
|
| 49 |
|
| 50 |
/* make various TB consistency checks */
|
| 51 |
//#define DEBUG_TB_CHECK
|
| 52 |
//#define DEBUG_TLB_CHECK
|
| 53 |
|
| 54 |
//#define DEBUG_IOPORT
|
| 55 |
//#define DEBUG_SUBPAGE
|
| 56 |
|
| 57 |
#if !defined(CONFIG_USER_ONLY)
|
| 58 |
/* TB consistency checks only implemented for usermode emulation. */
|
| 59 |
#undef DEBUG_TB_CHECK
|
| 60 |
#endif
|
| 61 |
|
| 62 |
#define SMC_BITMAP_USE_THRESHOLD 10 |
| 63 |
|
| 64 |
#if defined(TARGET_SPARC64)
|
| 65 |
#define TARGET_PHYS_ADDR_SPACE_BITS 41 |
| 66 |
#elif defined(TARGET_SPARC)
|
| 67 |
#define TARGET_PHYS_ADDR_SPACE_BITS 36 |
| 68 |
#elif defined(TARGET_ALPHA)
|
| 69 |
#define TARGET_PHYS_ADDR_SPACE_BITS 42 |
| 70 |
#define TARGET_VIRT_ADDR_SPACE_BITS 42 |
| 71 |
#elif defined(TARGET_PPC64)
|
| 72 |
#define TARGET_PHYS_ADDR_SPACE_BITS 42 |
| 73 |
#elif defined(TARGET_X86_64)
|
| 74 |
#define TARGET_PHYS_ADDR_SPACE_BITS 42 |
| 75 |
#elif defined(TARGET_I386)
|
| 76 |
#define TARGET_PHYS_ADDR_SPACE_BITS 36 |
| 77 |
#else
|
| 78 |
#define TARGET_PHYS_ADDR_SPACE_BITS 32 |
| 79 |
#endif
|
| 80 |
|
| 81 |
static TranslationBlock *tbs;
|
| 82 |
int code_gen_max_blocks;
|
| 83 |
TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE]; |
| 84 |
static int nb_tbs; |
| 85 |
/* any access to the tbs or the page table must use this lock */
|
| 86 |
spinlock_t tb_lock = SPIN_LOCK_UNLOCKED; |
| 87 |
|
| 88 |
#if defined(__arm__) || defined(__sparc_v9__)
|
| 89 |
/* The prologue must be reachable with a direct jump. ARM and Sparc64
|
| 90 |
have limited branch ranges (possibly also PPC) so place it in a
|
| 91 |
section close to code segment. */
|
| 92 |
#define code_gen_section \
|
| 93 |
__attribute__((__section__(".gen_code"))) \
|
| 94 |
__attribute__((aligned (32)))
|
| 95 |
#elif defined(_WIN32)
|
| 96 |
/* Maximum alignment for Win32 is 16. */
|
| 97 |
#define code_gen_section \
|
| 98 |
__attribute__((aligned (16)))
|
| 99 |
#else
|
| 100 |
#define code_gen_section \
|
| 101 |
__attribute__((aligned (32)))
|
| 102 |
#endif
|
| 103 |
|
| 104 |
uint8_t code_gen_prologue[1024] code_gen_section;
|
| 105 |
static uint8_t *code_gen_buffer;
|
| 106 |
static unsigned long code_gen_buffer_size; |
| 107 |
/* threshold to flush the translated code buffer */
|
| 108 |
static unsigned long code_gen_buffer_max_size; |
| 109 |
uint8_t *code_gen_ptr; |
| 110 |
|
| 111 |
#if !defined(CONFIG_USER_ONLY)
|
| 112 |
int phys_ram_fd;
|
| 113 |
uint8_t *phys_ram_dirty; |
| 114 |
static int in_migration; |
| 115 |
|
| 116 |
typedef struct RAMBlock { |
| 117 |
uint8_t *host; |
| 118 |
ram_addr_t offset; |
| 119 |
ram_addr_t length; |
| 120 |
struct RAMBlock *next;
|
| 121 |
} RAMBlock; |
| 122 |
|
| 123 |
static RAMBlock *ram_blocks;
|
| 124 |
/* TODO: When we implement (and use) ram deallocation (e.g. for hotplug)
|
| 125 |
then we can no longer assume contiguous ram offsets, and external uses
|
| 126 |
of this variable will break. */
|
| 127 |
ram_addr_t last_ram_offset; |
| 128 |
#endif
|
| 129 |
|
| 130 |
CPUState *first_cpu; |
| 131 |
/* current CPU in the current thread. It is only valid inside
|
| 132 |
cpu_exec() */
|
| 133 |
CPUState *cpu_single_env; |
| 134 |
/* 0 = Do not count executed instructions.
|
| 135 |
1 = Precise instruction counting.
|
| 136 |
2 = Adaptive rate instruction counting. */
|
| 137 |
int use_icount = 0; |
| 138 |
/* Current instruction counter. While executing translated code this may
|
| 139 |
include some instructions that have not yet been executed. */
|
| 140 |
int64_t qemu_icount; |
| 141 |
|
| 142 |
typedef struct PageDesc { |
| 143 |
/* list of TBs intersecting this ram page */
|
| 144 |
TranslationBlock *first_tb; |
| 145 |
/* in order to optimize self modifying code, we count the number
|
| 146 |
of lookups we do to a given page to use a bitmap */
|
| 147 |
unsigned int code_write_count; |
| 148 |
uint8_t *code_bitmap; |
| 149 |
#if defined(CONFIG_USER_ONLY)
|
| 150 |
unsigned long flags; |
| 151 |
#endif
|
| 152 |
} PageDesc; |
| 153 |
|
| 154 |
typedef struct PhysPageDesc { |
| 155 |
/* offset in host memory of the page + io_index in the low bits */
|
| 156 |
ram_addr_t phys_offset; |
| 157 |
ram_addr_t region_offset; |
| 158 |
} PhysPageDesc; |
| 159 |
|
| 160 |
#define L2_BITS 10 |
| 161 |
#if defined(CONFIG_USER_ONLY) && defined(TARGET_VIRT_ADDR_SPACE_BITS)
|
| 162 |
/* XXX: this is a temporary hack for alpha target.
|
| 163 |
* In the future, this is to be replaced by a multi-level table
|
| 164 |
* to actually be able to handle the complete 64 bits address space.
|
| 165 |
*/
|
| 166 |
#define L1_BITS (TARGET_VIRT_ADDR_SPACE_BITS - L2_BITS - TARGET_PAGE_BITS)
|
| 167 |
#else
|
| 168 |
#define L1_BITS (32 - L2_BITS - TARGET_PAGE_BITS) |
| 169 |
#endif
|
| 170 |
|
| 171 |
#define L1_SIZE (1 << L1_BITS) |
| 172 |
#define L2_SIZE (1 << L2_BITS) |
| 173 |
|
| 174 |
unsigned long qemu_real_host_page_size; |
| 175 |
unsigned long qemu_host_page_bits; |
| 176 |
unsigned long qemu_host_page_size; |
| 177 |
unsigned long qemu_host_page_mask; |
| 178 |
|
| 179 |
/* XXX: for system emulation, it could just be an array */
|
| 180 |
static PageDesc *l1_map[L1_SIZE];
|
| 181 |
static PhysPageDesc **l1_phys_map;
|
| 182 |
|
| 183 |
#if !defined(CONFIG_USER_ONLY)
|
| 184 |
static void io_mem_init(void); |
| 185 |
|
| 186 |
/* io memory support */
|
| 187 |
CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
|
| 188 |
CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
|
| 189 |
void *io_mem_opaque[IO_MEM_NB_ENTRIES];
|
| 190 |
static char io_mem_used[IO_MEM_NB_ENTRIES]; |
| 191 |
static int io_mem_watch; |
| 192 |
#endif
|
| 193 |
|
| 194 |
/* log support */
|
| 195 |
static const char *logfilename = "/tmp/qemu.log"; |
| 196 |
FILE *logfile; |
| 197 |
int loglevel;
|
| 198 |
static int log_append = 0; |
| 199 |
|
| 200 |
/* statistics */
|
| 201 |
static int tlb_flush_count; |
| 202 |
static int tb_flush_count; |
| 203 |
static int tb_phys_invalidate_count; |
| 204 |
|
| 205 |
#define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK)
|
| 206 |
typedef struct subpage_t { |
| 207 |
target_phys_addr_t base; |
| 208 |
CPUReadMemoryFunc * const *mem_read[TARGET_PAGE_SIZE][4]; |
| 209 |
CPUWriteMemoryFunc * const *mem_write[TARGET_PAGE_SIZE][4]; |
| 210 |
void *opaque[TARGET_PAGE_SIZE][2][4]; |
| 211 |
ram_addr_t region_offset[TARGET_PAGE_SIZE][2][4]; |
| 212 |
} subpage_t; |
| 213 |
|
| 214 |
#ifdef _WIN32
|
| 215 |
static void map_exec(void *addr, long size) |
| 216 |
{
|
| 217 |
DWORD old_protect; |
| 218 |
VirtualProtect(addr, size, |
| 219 |
PAGE_EXECUTE_READWRITE, &old_protect); |
| 220 |
|
| 221 |
} |
| 222 |
#else
|
| 223 |
static void map_exec(void *addr, long size) |
| 224 |
{
|
| 225 |
unsigned long start, end, page_size; |
| 226 |
|
| 227 |
page_size = getpagesize(); |
| 228 |
start = (unsigned long)addr; |
| 229 |
start &= ~(page_size - 1);
|
| 230 |
|
| 231 |
end = (unsigned long)addr + size; |
| 232 |
end += page_size - 1;
|
| 233 |
end &= ~(page_size - 1);
|
| 234 |
|
| 235 |
mprotect((void *)start, end - start,
|
| 236 |
PROT_READ | PROT_WRITE | PROT_EXEC); |
| 237 |
} |
| 238 |
#endif
|
| 239 |
|
| 240 |
static void page_init(void) |
| 241 |
{
|
| 242 |
/* NOTE: we can always suppose that qemu_host_page_size >=
|
| 243 |
TARGET_PAGE_SIZE */
|
| 244 |
#ifdef _WIN32
|
| 245 |
{
|
| 246 |
SYSTEM_INFO system_info; |
| 247 |
|
| 248 |
GetSystemInfo(&system_info); |
| 249 |
qemu_real_host_page_size = system_info.dwPageSize; |
| 250 |
} |
| 251 |
#else
|
| 252 |
qemu_real_host_page_size = getpagesize(); |
| 253 |
#endif
|
| 254 |
if (qemu_host_page_size == 0) |
| 255 |
qemu_host_page_size = qemu_real_host_page_size; |
| 256 |
if (qemu_host_page_size < TARGET_PAGE_SIZE)
|
| 257 |
qemu_host_page_size = TARGET_PAGE_SIZE; |
| 258 |
qemu_host_page_bits = 0;
|
| 259 |
while ((1 << qemu_host_page_bits) < qemu_host_page_size) |
| 260 |
qemu_host_page_bits++; |
| 261 |
qemu_host_page_mask = ~(qemu_host_page_size - 1);
|
| 262 |
l1_phys_map = qemu_vmalloc(L1_SIZE * sizeof(void *)); |
| 263 |
memset(l1_phys_map, 0, L1_SIZE * sizeof(void *)); |
| 264 |
|
| 265 |
#if !defined(_WIN32) && defined(CONFIG_USER_ONLY)
|
| 266 |
{
|
| 267 |
long long startaddr, endaddr; |
| 268 |
FILE *f; |
| 269 |
int n;
|
| 270 |
|
| 271 |
mmap_lock(); |
| 272 |
last_brk = (unsigned long)sbrk(0); |
| 273 |
f = fopen("/proc/self/maps", "r"); |
| 274 |
if (f) {
|
| 275 |
do {
|
| 276 |
n = fscanf (f, "%llx-%llx %*[^\n]\n", &startaddr, &endaddr);
|
| 277 |
if (n == 2) { |
| 278 |
startaddr = MIN(startaddr, |
| 279 |
(1ULL << TARGET_PHYS_ADDR_SPACE_BITS) - 1); |
| 280 |
endaddr = MIN(endaddr, |
| 281 |
(1ULL << TARGET_PHYS_ADDR_SPACE_BITS) - 1); |
| 282 |
page_set_flags(startaddr & TARGET_PAGE_MASK, |
| 283 |
TARGET_PAGE_ALIGN(endaddr), |
| 284 |
PAGE_RESERVED); |
| 285 |
} |
| 286 |
} while (!feof(f));
|
| 287 |
fclose(f); |
| 288 |
} |
| 289 |
mmap_unlock(); |
| 290 |
} |
| 291 |
#endif
|
| 292 |
} |
| 293 |
|
| 294 |
static inline PageDesc **page_l1_map(target_ulong index) |
| 295 |
{
|
| 296 |
#if TARGET_LONG_BITS > 32 |
| 297 |
/* Host memory outside guest VM. For 32-bit targets we have already
|
| 298 |
excluded high addresses. */
|
| 299 |
if (index > ((target_ulong)L2_SIZE * L1_SIZE))
|
| 300 |
return NULL; |
| 301 |
#endif
|
| 302 |
return &l1_map[index >> L2_BITS];
|
| 303 |
} |
| 304 |
|
| 305 |
static inline PageDesc *page_find_alloc(target_ulong index) |
| 306 |
{
|
| 307 |
PageDesc **lp, *p; |
| 308 |
lp = page_l1_map(index); |
| 309 |
if (!lp)
|
| 310 |
return NULL; |
| 311 |
|
| 312 |
p = *lp; |
| 313 |
if (!p) {
|
| 314 |
/* allocate if not found */
|
| 315 |
#if defined(CONFIG_USER_ONLY)
|
| 316 |
size_t len = sizeof(PageDesc) * L2_SIZE;
|
| 317 |
/* Don't use qemu_malloc because it may recurse. */
|
| 318 |
p = mmap(NULL, len, PROT_READ | PROT_WRITE,
|
| 319 |
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 320 |
*lp = p; |
| 321 |
if (h2g_valid(p)) {
|
| 322 |
unsigned long addr = h2g(p); |
| 323 |
page_set_flags(addr & TARGET_PAGE_MASK, |
| 324 |
TARGET_PAGE_ALIGN(addr + len), |
| 325 |
PAGE_RESERVED); |
| 326 |
} |
| 327 |
#else
|
| 328 |
p = qemu_mallocz(sizeof(PageDesc) * L2_SIZE);
|
| 329 |
*lp = p; |
| 330 |
#endif
|
| 331 |
} |
| 332 |
return p + (index & (L2_SIZE - 1)); |
| 333 |
} |
| 334 |
|
| 335 |
static inline PageDesc *page_find(target_ulong index) |
| 336 |
{
|
| 337 |
PageDesc **lp, *p; |
| 338 |
lp = page_l1_map(index); |
| 339 |
if (!lp)
|
| 340 |
return NULL; |
| 341 |
|
| 342 |
p = *lp; |
| 343 |
if (!p) {
|
| 344 |
return NULL; |
| 345 |
} |
| 346 |
return p + (index & (L2_SIZE - 1)); |
| 347 |
} |
| 348 |
|
| 349 |
static PhysPageDesc *phys_page_find_alloc(target_phys_addr_t index, int alloc) |
| 350 |
{
|
| 351 |
void **lp, **p;
|
| 352 |
PhysPageDesc *pd; |
| 353 |
|
| 354 |
p = (void **)l1_phys_map;
|
| 355 |
#if TARGET_PHYS_ADDR_SPACE_BITS > 32 |
| 356 |
|
| 357 |
#if TARGET_PHYS_ADDR_SPACE_BITS > (32 + L1_BITS) |
| 358 |
#error unsupported TARGET_PHYS_ADDR_SPACE_BITS
|
| 359 |
#endif
|
| 360 |
lp = p + ((index >> (L1_BITS + L2_BITS)) & (L1_SIZE - 1));
|
| 361 |
p = *lp; |
| 362 |
if (!p) {
|
| 363 |
/* allocate if not found */
|
| 364 |
if (!alloc)
|
| 365 |
return NULL; |
| 366 |
p = qemu_vmalloc(sizeof(void *) * L1_SIZE); |
| 367 |
memset(p, 0, sizeof(void *) * L1_SIZE); |
| 368 |
*lp = p; |
| 369 |
} |
| 370 |
#endif
|
| 371 |
lp = p + ((index >> L2_BITS) & (L1_SIZE - 1));
|
| 372 |
pd = *lp; |
| 373 |
if (!pd) {
|
| 374 |
int i;
|
| 375 |
/* allocate if not found */
|
| 376 |
if (!alloc)
|
| 377 |
return NULL; |
| 378 |
pd = qemu_vmalloc(sizeof(PhysPageDesc) * L2_SIZE);
|
| 379 |
*lp = pd; |
| 380 |
for (i = 0; i < L2_SIZE; i++) { |
| 381 |
pd[i].phys_offset = IO_MEM_UNASSIGNED; |
| 382 |
pd[i].region_offset = (index + i) << TARGET_PAGE_BITS; |
| 383 |
} |
| 384 |
} |
| 385 |
return ((PhysPageDesc *)pd) + (index & (L2_SIZE - 1)); |
| 386 |
} |
| 387 |
|
| 388 |
static inline PhysPageDesc *phys_page_find(target_phys_addr_t index) |
| 389 |
{
|
| 390 |
return phys_page_find_alloc(index, 0); |
| 391 |
} |
| 392 |
|
| 393 |
#if !defined(CONFIG_USER_ONLY)
|
| 394 |
static void tlb_protect_code(ram_addr_t ram_addr); |
| 395 |
static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr, |
| 396 |
target_ulong vaddr); |
| 397 |
#define mmap_lock() do { } while(0) |
| 398 |
#define mmap_unlock() do { } while(0) |
| 399 |
#endif
|
| 400 |
|
| 401 |
#define DEFAULT_CODE_GEN_BUFFER_SIZE (32 * 1024 * 1024) |
| 402 |
|
| 403 |
#if defined(CONFIG_USER_ONLY)
|
| 404 |
/* Currently it is not recommended to allocate big chunks of data in
|
| 405 |
user mode. It will change when a dedicated libc will be used */
|
| 406 |
#define USE_STATIC_CODE_GEN_BUFFER
|
| 407 |
#endif
|
| 408 |
|
| 409 |
#ifdef USE_STATIC_CODE_GEN_BUFFER
|
| 410 |
static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE];
|
| 411 |
#endif
|
| 412 |
|
| 413 |
static void code_gen_alloc(unsigned long tb_size) |
| 414 |
{
|
| 415 |
#ifdef USE_STATIC_CODE_GEN_BUFFER
|
| 416 |
code_gen_buffer = static_code_gen_buffer; |
| 417 |
code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE; |
| 418 |
map_exec(code_gen_buffer, code_gen_buffer_size); |
| 419 |
#else
|
| 420 |
code_gen_buffer_size = tb_size; |
| 421 |
if (code_gen_buffer_size == 0) { |
| 422 |
#if defined(CONFIG_USER_ONLY)
|
| 423 |
/* in user mode, phys_ram_size is not meaningful */
|
| 424 |
code_gen_buffer_size = DEFAULT_CODE_GEN_BUFFER_SIZE; |
| 425 |
#else
|
| 426 |
/* XXX: needs adjustments */
|
| 427 |
code_gen_buffer_size = (unsigned long)(ram_size / 4); |
| 428 |
#endif
|
| 429 |
} |
| 430 |
if (code_gen_buffer_size < MIN_CODE_GEN_BUFFER_SIZE)
|
| 431 |
code_gen_buffer_size = MIN_CODE_GEN_BUFFER_SIZE; |
| 432 |
/* The code gen buffer location may have constraints depending on
|
| 433 |
the host cpu and OS */
|
| 434 |
#if defined(__linux__)
|
| 435 |
{
|
| 436 |
int flags;
|
| 437 |
void *start = NULL; |
| 438 |
|
| 439 |
flags = MAP_PRIVATE | MAP_ANONYMOUS; |
| 440 |
#if defined(__x86_64__)
|
| 441 |
flags |= MAP_32BIT; |
| 442 |
/* Cannot map more than that */
|
| 443 |
if (code_gen_buffer_size > (800 * 1024 * 1024)) |
| 444 |
code_gen_buffer_size = (800 * 1024 * 1024); |
| 445 |
#elif defined(__sparc_v9__)
|
| 446 |
// Map the buffer below 2G, so we can use direct calls and branches
|
| 447 |
flags |= MAP_FIXED; |
| 448 |
start = (void *) 0x60000000UL; |
| 449 |
if (code_gen_buffer_size > (512 * 1024 * 1024)) |
| 450 |
code_gen_buffer_size = (512 * 1024 * 1024); |
| 451 |
#elif defined(__arm__)
|
| 452 |
/* Map the buffer below 32M, so we can use direct calls and branches */
|
| 453 |
flags |= MAP_FIXED; |
| 454 |
start = (void *) 0x01000000UL; |
| 455 |
if (code_gen_buffer_size > 16 * 1024 * 1024) |
| 456 |
code_gen_buffer_size = 16 * 1024 * 1024; |
| 457 |
#endif
|
| 458 |
code_gen_buffer = mmap(start, code_gen_buffer_size, |
| 459 |
PROT_WRITE | PROT_READ | PROT_EXEC, |
| 460 |
flags, -1, 0); |
| 461 |
if (code_gen_buffer == MAP_FAILED) {
|
| 462 |
fprintf(stderr, "Could not allocate dynamic translator buffer\n");
|
| 463 |
exit(1);
|
| 464 |
} |
| 465 |
} |
| 466 |
#elif defined(__FreeBSD__) || defined(__DragonFly__)
|
| 467 |
{
|
| 468 |
int flags;
|
| 469 |
void *addr = NULL; |
| 470 |
flags = MAP_PRIVATE | MAP_ANONYMOUS; |
| 471 |
#if defined(__x86_64__)
|
| 472 |
/* FreeBSD doesn't have MAP_32BIT, use MAP_FIXED and assume
|
| 473 |
* 0x40000000 is free */
|
| 474 |
flags |= MAP_FIXED; |
| 475 |
addr = (void *)0x40000000; |
| 476 |
/* Cannot map more than that */
|
| 477 |
if (code_gen_buffer_size > (800 * 1024 * 1024)) |
| 478 |
code_gen_buffer_size = (800 * 1024 * 1024); |
| 479 |
#endif
|
| 480 |
code_gen_buffer = mmap(addr, code_gen_buffer_size, |
| 481 |
PROT_WRITE | PROT_READ | PROT_EXEC, |
| 482 |
flags, -1, 0); |
| 483 |
if (code_gen_buffer == MAP_FAILED) {
|
| 484 |
fprintf(stderr, "Could not allocate dynamic translator buffer\n");
|
| 485 |
exit(1);
|
| 486 |
} |
| 487 |
} |
| 488 |
#else
|
| 489 |
code_gen_buffer = qemu_malloc(code_gen_buffer_size); |
| 490 |
map_exec(code_gen_buffer, code_gen_buffer_size); |
| 491 |
#endif
|
| 492 |
#endif /* !USE_STATIC_CODE_GEN_BUFFER */ |
| 493 |
map_exec(code_gen_prologue, sizeof(code_gen_prologue));
|
| 494 |
code_gen_buffer_max_size = code_gen_buffer_size - |
| 495 |
code_gen_max_block_size(); |
| 496 |
code_gen_max_blocks = code_gen_buffer_size / CODE_GEN_AVG_BLOCK_SIZE; |
| 497 |
tbs = qemu_malloc(code_gen_max_blocks * sizeof(TranslationBlock));
|
| 498 |
} |
| 499 |
|
| 500 |
/* Must be called before using the QEMU cpus. 'tb_size' is the size
|
| 501 |
(in bytes) allocated to the translation buffer. Zero means default
|
| 502 |
size. */
|
| 503 |
void cpu_exec_init_all(unsigned long tb_size) |
| 504 |
{
|
| 505 |
cpu_gen_init(); |
| 506 |
code_gen_alloc(tb_size); |
| 507 |
code_gen_ptr = code_gen_buffer; |
| 508 |
page_init(); |
| 509 |
#if !defined(CONFIG_USER_ONLY)
|
| 510 |
io_mem_init(); |
| 511 |
#endif
|
| 512 |
} |
| 513 |
|
| 514 |
#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
|
| 515 |
|
| 516 |
static void cpu_common_pre_save(void *opaque) |
| 517 |
{
|
| 518 |
CPUState *env = opaque; |
| 519 |
|
| 520 |
cpu_synchronize_state(env); |
| 521 |
} |
| 522 |
|
| 523 |
static int cpu_common_pre_load(void *opaque) |
| 524 |
{
|
| 525 |
CPUState *env = opaque; |
| 526 |
|
| 527 |
cpu_synchronize_state(env); |
| 528 |
return 0; |
| 529 |
} |
| 530 |
|
| 531 |
static int cpu_common_post_load(void *opaque, int version_id) |
| 532 |
{
|
| 533 |
CPUState *env = opaque; |
| 534 |
|
| 535 |
/* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
|
| 536 |
version_id is increased. */
|
| 537 |
env->interrupt_request &= ~0x01;
|
| 538 |
tlb_flush(env, 1);
|
| 539 |
|
| 540 |
return 0; |
| 541 |
} |
| 542 |
|
| 543 |
static const VMStateDescription vmstate_cpu_common = { |
| 544 |
.name = "cpu_common",
|
| 545 |
.version_id = 1,
|
| 546 |
.minimum_version_id = 1,
|
| 547 |
.minimum_version_id_old = 1,
|
| 548 |
.pre_save = cpu_common_pre_save, |
| 549 |
.pre_load = cpu_common_pre_load, |
| 550 |
.post_load = cpu_common_post_load, |
| 551 |
.fields = (VMStateField []) {
|
| 552 |
VMSTATE_UINT32(halted, CPUState), |
| 553 |
VMSTATE_UINT32(interrupt_request, CPUState), |
| 554 |
VMSTATE_END_OF_LIST() |
| 555 |
} |
| 556 |
}; |
| 557 |
#endif
|
| 558 |
|
| 559 |
CPUState *qemu_get_cpu(int cpu)
|
| 560 |
{
|
| 561 |
CPUState *env = first_cpu; |
| 562 |
|
| 563 |
while (env) {
|
| 564 |
if (env->cpu_index == cpu)
|
| 565 |
break;
|
| 566 |
env = env->next_cpu; |
| 567 |
} |
| 568 |
|
| 569 |
return env;
|
| 570 |
} |
| 571 |
|
| 572 |
void cpu_exec_init(CPUState *env)
|
| 573 |
{
|
| 574 |
CPUState **penv; |
| 575 |
int cpu_index;
|
| 576 |
|
| 577 |
#if defined(CONFIG_USER_ONLY)
|
| 578 |
cpu_list_lock(); |
| 579 |
#endif
|
| 580 |
env->next_cpu = NULL;
|
| 581 |
penv = &first_cpu; |
| 582 |
cpu_index = 0;
|
| 583 |
while (*penv != NULL) { |
| 584 |
penv = &(*penv)->next_cpu; |
| 585 |
cpu_index++; |
| 586 |
} |
| 587 |
env->cpu_index = cpu_index; |
| 588 |
env->numa_node = 0;
|
| 589 |
QTAILQ_INIT(&env->breakpoints); |
| 590 |
QTAILQ_INIT(&env->watchpoints); |
| 591 |
*penv = env; |
| 592 |
#if defined(CONFIG_USER_ONLY)
|
| 593 |
cpu_list_unlock(); |
| 594 |
#endif
|
| 595 |
#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
|
| 596 |
vmstate_register(cpu_index, &vmstate_cpu_common, env); |
| 597 |
register_savevm("cpu", cpu_index, CPU_SAVE_VERSION,
|
| 598 |
cpu_save, cpu_load, env); |
| 599 |
#endif
|
| 600 |
} |
| 601 |
|
| 602 |
static inline void invalidate_page_bitmap(PageDesc *p) |
| 603 |
{
|
| 604 |
if (p->code_bitmap) {
|
| 605 |
qemu_free(p->code_bitmap); |
| 606 |
p->code_bitmap = NULL;
|
| 607 |
} |
| 608 |
p->code_write_count = 0;
|
| 609 |
} |
| 610 |
|
| 611 |
/* set to NULL all the 'first_tb' fields in all PageDescs */
|
| 612 |
static void page_flush_tb(void) |
| 613 |
{
|
| 614 |
int i, j;
|
| 615 |
PageDesc *p; |
| 616 |
|
| 617 |
for(i = 0; i < L1_SIZE; i++) { |
| 618 |
p = l1_map[i]; |
| 619 |
if (p) {
|
| 620 |
for(j = 0; j < L2_SIZE; j++) { |
| 621 |
p->first_tb = NULL;
|
| 622 |
invalidate_page_bitmap(p); |
| 623 |
p++; |
| 624 |
} |
| 625 |
} |
| 626 |
} |
| 627 |
} |
| 628 |
|
| 629 |
/* flush all the translation blocks */
|
| 630 |
/* XXX: tb_flush is currently not thread safe */
|
| 631 |
void tb_flush(CPUState *env1)
|
| 632 |
{
|
| 633 |
CPUState *env; |
| 634 |
#if defined(DEBUG_FLUSH)
|
| 635 |
printf("qemu: flush code_size=%ld nb_tbs=%d avg_tb_size=%ld\n",
|
| 636 |
(unsigned long)(code_gen_ptr - code_gen_buffer), |
| 637 |
nb_tbs, nb_tbs > 0 ?
|
| 638 |
((unsigned long)(code_gen_ptr - code_gen_buffer)) / nb_tbs : 0); |
| 639 |
#endif
|
| 640 |
if ((unsigned long)(code_gen_ptr - code_gen_buffer) > code_gen_buffer_size) |
| 641 |
cpu_abort(env1, "Internal error: code buffer overflow\n");
|
| 642 |
|
| 643 |
nb_tbs = 0;
|
| 644 |
|
| 645 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
| 646 |
memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *)); |
| 647 |
} |
| 648 |
|
| 649 |
memset (tb_phys_hash, 0, CODE_GEN_PHYS_HASH_SIZE * sizeof (void *)); |
| 650 |
page_flush_tb(); |
| 651 |
|
| 652 |
code_gen_ptr = code_gen_buffer; |
| 653 |
/* XXX: flush processor icache at this point if cache flush is
|
| 654 |
expensive */
|
| 655 |
tb_flush_count++; |
| 656 |
} |
| 657 |
|
| 658 |
#ifdef DEBUG_TB_CHECK
|
| 659 |
|
| 660 |
static void tb_invalidate_check(target_ulong address) |
| 661 |
{
|
| 662 |
TranslationBlock *tb; |
| 663 |
int i;
|
| 664 |
address &= TARGET_PAGE_MASK; |
| 665 |
for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) { |
| 666 |
for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) { |
| 667 |
if (!(address + TARGET_PAGE_SIZE <= tb->pc ||
|
| 668 |
address >= tb->pc + tb->size)) {
|
| 669 |
printf("ERROR invalidate: address=" TARGET_FMT_lx
|
| 670 |
" PC=%08lx size=%04x\n",
|
| 671 |
address, (long)tb->pc, tb->size);
|
| 672 |
} |
| 673 |
} |
| 674 |
} |
| 675 |
} |
| 676 |
|
| 677 |
/* verify that all the pages have correct rights for code */
|
| 678 |
static void tb_page_check(void) |
| 679 |
{
|
| 680 |
TranslationBlock *tb; |
| 681 |
int i, flags1, flags2;
|
| 682 |
|
| 683 |
for(i = 0;i < CODE_GEN_PHYS_HASH_SIZE; i++) { |
| 684 |
for(tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) { |
| 685 |
flags1 = page_get_flags(tb->pc); |
| 686 |
flags2 = page_get_flags(tb->pc + tb->size - 1);
|
| 687 |
if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) {
|
| 688 |
printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n",
|
| 689 |
(long)tb->pc, tb->size, flags1, flags2);
|
| 690 |
} |
| 691 |
} |
| 692 |
} |
| 693 |
} |
| 694 |
|
| 695 |
#endif
|
| 696 |
|
| 697 |
/* invalidate one TB */
|
| 698 |
static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb, |
| 699 |
int next_offset)
|
| 700 |
{
|
| 701 |
TranslationBlock *tb1; |
| 702 |
for(;;) {
|
| 703 |
tb1 = *ptb; |
| 704 |
if (tb1 == tb) {
|
| 705 |
*ptb = *(TranslationBlock **)((char *)tb1 + next_offset);
|
| 706 |
break;
|
| 707 |
} |
| 708 |
ptb = (TranslationBlock **)((char *)tb1 + next_offset);
|
| 709 |
} |
| 710 |
} |
| 711 |
|
| 712 |
static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb) |
| 713 |
{
|
| 714 |
TranslationBlock *tb1; |
| 715 |
unsigned int n1; |
| 716 |
|
| 717 |
for(;;) {
|
| 718 |
tb1 = *ptb; |
| 719 |
n1 = (long)tb1 & 3; |
| 720 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 721 |
if (tb1 == tb) {
|
| 722 |
*ptb = tb1->page_next[n1]; |
| 723 |
break;
|
| 724 |
} |
| 725 |
ptb = &tb1->page_next[n1]; |
| 726 |
} |
| 727 |
} |
| 728 |
|
| 729 |
static inline void tb_jmp_remove(TranslationBlock *tb, int n) |
| 730 |
{
|
| 731 |
TranslationBlock *tb1, **ptb; |
| 732 |
unsigned int n1; |
| 733 |
|
| 734 |
ptb = &tb->jmp_next[n]; |
| 735 |
tb1 = *ptb; |
| 736 |
if (tb1) {
|
| 737 |
/* find tb(n) in circular list */
|
| 738 |
for(;;) {
|
| 739 |
tb1 = *ptb; |
| 740 |
n1 = (long)tb1 & 3; |
| 741 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 742 |
if (n1 == n && tb1 == tb)
|
| 743 |
break;
|
| 744 |
if (n1 == 2) { |
| 745 |
ptb = &tb1->jmp_first; |
| 746 |
} else {
|
| 747 |
ptb = &tb1->jmp_next[n1]; |
| 748 |
} |
| 749 |
} |
| 750 |
/* now we can suppress tb(n) from the list */
|
| 751 |
*ptb = tb->jmp_next[n]; |
| 752 |
|
| 753 |
tb->jmp_next[n] = NULL;
|
| 754 |
} |
| 755 |
} |
| 756 |
|
| 757 |
/* reset the jump entry 'n' of a TB so that it is not chained to
|
| 758 |
another TB */
|
| 759 |
static inline void tb_reset_jump(TranslationBlock *tb, int n) |
| 760 |
{
|
| 761 |
tb_set_jmp_target(tb, n, (unsigned long)(tb->tc_ptr + tb->tb_next_offset[n])); |
| 762 |
} |
| 763 |
|
| 764 |
void tb_phys_invalidate(TranslationBlock *tb, target_ulong page_addr)
|
| 765 |
{
|
| 766 |
CPUState *env; |
| 767 |
PageDesc *p; |
| 768 |
unsigned int h, n1; |
| 769 |
target_phys_addr_t phys_pc; |
| 770 |
TranslationBlock *tb1, *tb2; |
| 771 |
|
| 772 |
/* remove the TB from the hash list */
|
| 773 |
phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
| 774 |
h = tb_phys_hash_func(phys_pc); |
| 775 |
tb_remove(&tb_phys_hash[h], tb, |
| 776 |
offsetof(TranslationBlock, phys_hash_next)); |
| 777 |
|
| 778 |
/* remove the TB from the page list */
|
| 779 |
if (tb->page_addr[0] != page_addr) { |
| 780 |
p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
|
| 781 |
tb_page_remove(&p->first_tb, tb); |
| 782 |
invalidate_page_bitmap(p); |
| 783 |
} |
| 784 |
if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) { |
| 785 |
p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
|
| 786 |
tb_page_remove(&p->first_tb, tb); |
| 787 |
invalidate_page_bitmap(p); |
| 788 |
} |
| 789 |
|
| 790 |
tb_invalidated_flag = 1;
|
| 791 |
|
| 792 |
/* remove the TB from the hash list */
|
| 793 |
h = tb_jmp_cache_hash_func(tb->pc); |
| 794 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
| 795 |
if (env->tb_jmp_cache[h] == tb)
|
| 796 |
env->tb_jmp_cache[h] = NULL;
|
| 797 |
} |
| 798 |
|
| 799 |
/* suppress this TB from the two jump lists */
|
| 800 |
tb_jmp_remove(tb, 0);
|
| 801 |
tb_jmp_remove(tb, 1);
|
| 802 |
|
| 803 |
/* suppress any remaining jumps to this TB */
|
| 804 |
tb1 = tb->jmp_first; |
| 805 |
for(;;) {
|
| 806 |
n1 = (long)tb1 & 3; |
| 807 |
if (n1 == 2) |
| 808 |
break;
|
| 809 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 810 |
tb2 = tb1->jmp_next[n1]; |
| 811 |
tb_reset_jump(tb1, n1); |
| 812 |
tb1->jmp_next[n1] = NULL;
|
| 813 |
tb1 = tb2; |
| 814 |
} |
| 815 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); /* fail safe */ |
| 816 |
|
| 817 |
tb_phys_invalidate_count++; |
| 818 |
} |
| 819 |
|
| 820 |
static inline void set_bits(uint8_t *tab, int start, int len) |
| 821 |
{
|
| 822 |
int end, mask, end1;
|
| 823 |
|
| 824 |
end = start + len; |
| 825 |
tab += start >> 3;
|
| 826 |
mask = 0xff << (start & 7); |
| 827 |
if ((start & ~7) == (end & ~7)) { |
| 828 |
if (start < end) {
|
| 829 |
mask &= ~(0xff << (end & 7)); |
| 830 |
*tab |= mask; |
| 831 |
} |
| 832 |
} else {
|
| 833 |
*tab++ |= mask; |
| 834 |
start = (start + 8) & ~7; |
| 835 |
end1 = end & ~7;
|
| 836 |
while (start < end1) {
|
| 837 |
*tab++ = 0xff;
|
| 838 |
start += 8;
|
| 839 |
} |
| 840 |
if (start < end) {
|
| 841 |
mask = ~(0xff << (end & 7)); |
| 842 |
*tab |= mask; |
| 843 |
} |
| 844 |
} |
| 845 |
} |
| 846 |
|
| 847 |
static void build_page_bitmap(PageDesc *p) |
| 848 |
{
|
| 849 |
int n, tb_start, tb_end;
|
| 850 |
TranslationBlock *tb; |
| 851 |
|
| 852 |
p->code_bitmap = qemu_mallocz(TARGET_PAGE_SIZE / 8);
|
| 853 |
|
| 854 |
tb = p->first_tb; |
| 855 |
while (tb != NULL) { |
| 856 |
n = (long)tb & 3; |
| 857 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 858 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
| 859 |
if (n == 0) { |
| 860 |
/* NOTE: tb_end may be after the end of the page, but
|
| 861 |
it is not a problem */
|
| 862 |
tb_start = tb->pc & ~TARGET_PAGE_MASK; |
| 863 |
tb_end = tb_start + tb->size; |
| 864 |
if (tb_end > TARGET_PAGE_SIZE)
|
| 865 |
tb_end = TARGET_PAGE_SIZE; |
| 866 |
} else {
|
| 867 |
tb_start = 0;
|
| 868 |
tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| 869 |
} |
| 870 |
set_bits(p->code_bitmap, tb_start, tb_end - tb_start); |
| 871 |
tb = tb->page_next[n]; |
| 872 |
} |
| 873 |
} |
| 874 |
|
| 875 |
TranslationBlock *tb_gen_code(CPUState *env, |
| 876 |
target_ulong pc, target_ulong cs_base, |
| 877 |
int flags, int cflags) |
| 878 |
{
|
| 879 |
TranslationBlock *tb; |
| 880 |
uint8_t *tc_ptr; |
| 881 |
target_ulong phys_pc, phys_page2, virt_page2; |
| 882 |
int code_gen_size;
|
| 883 |
|
| 884 |
phys_pc = get_phys_addr_code(env, pc); |
| 885 |
tb = tb_alloc(pc); |
| 886 |
if (!tb) {
|
| 887 |
/* flush must be done */
|
| 888 |
tb_flush(env); |
| 889 |
/* cannot fail at this point */
|
| 890 |
tb = tb_alloc(pc); |
| 891 |
/* Don't forget to invalidate previous TB info. */
|
| 892 |
tb_invalidated_flag = 1;
|
| 893 |
} |
| 894 |
tc_ptr = code_gen_ptr; |
| 895 |
tb->tc_ptr = tc_ptr; |
| 896 |
tb->cs_base = cs_base; |
| 897 |
tb->flags = flags; |
| 898 |
tb->cflags = cflags; |
| 899 |
cpu_gen_code(env, tb, &code_gen_size); |
| 900 |
code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1)); |
| 901 |
|
| 902 |
/* check next page if needed */
|
| 903 |
virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
|
| 904 |
phys_page2 = -1;
|
| 905 |
if ((pc & TARGET_PAGE_MASK) != virt_page2) {
|
| 906 |
phys_page2 = get_phys_addr_code(env, virt_page2); |
| 907 |
} |
| 908 |
tb_link_phys(tb, phys_pc, phys_page2); |
| 909 |
return tb;
|
| 910 |
} |
| 911 |
|
| 912 |
/* invalidate all TBs which intersect with the target physical page
|
| 913 |
starting in range [start;end[. NOTE: start and end must refer to
|
| 914 |
the same physical page. 'is_cpu_write_access' should be true if called
|
| 915 |
from a real cpu write access: the virtual CPU will exit the current
|
| 916 |
TB if code is modified inside this TB. */
|
| 917 |
void tb_invalidate_phys_page_range(target_phys_addr_t start, target_phys_addr_t end,
|
| 918 |
int is_cpu_write_access)
|
| 919 |
{
|
| 920 |
TranslationBlock *tb, *tb_next, *saved_tb; |
| 921 |
CPUState *env = cpu_single_env; |
| 922 |
target_ulong tb_start, tb_end; |
| 923 |
PageDesc *p; |
| 924 |
int n;
|
| 925 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 926 |
int current_tb_not_found = is_cpu_write_access;
|
| 927 |
TranslationBlock *current_tb = NULL;
|
| 928 |
int current_tb_modified = 0; |
| 929 |
target_ulong current_pc = 0;
|
| 930 |
target_ulong current_cs_base = 0;
|
| 931 |
int current_flags = 0; |
| 932 |
#endif /* TARGET_HAS_PRECISE_SMC */ |
| 933 |
|
| 934 |
p = page_find(start >> TARGET_PAGE_BITS); |
| 935 |
if (!p)
|
| 936 |
return;
|
| 937 |
if (!p->code_bitmap &&
|
| 938 |
++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD && |
| 939 |
is_cpu_write_access) {
|
| 940 |
/* build code bitmap */
|
| 941 |
build_page_bitmap(p); |
| 942 |
} |
| 943 |
|
| 944 |
/* we remove all the TBs in the range [start, end[ */
|
| 945 |
/* XXX: see if in some cases it could be faster to invalidate all the code */
|
| 946 |
tb = p->first_tb; |
| 947 |
while (tb != NULL) { |
| 948 |
n = (long)tb & 3; |
| 949 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 950 |
tb_next = tb->page_next[n]; |
| 951 |
/* NOTE: this is subtle as a TB may span two physical pages */
|
| 952 |
if (n == 0) { |
| 953 |
/* NOTE: tb_end may be after the end of the page, but
|
| 954 |
it is not a problem */
|
| 955 |
tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
|
| 956 |
tb_end = tb_start + tb->size; |
| 957 |
} else {
|
| 958 |
tb_start = tb->page_addr[1];
|
| 959 |
tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK); |
| 960 |
} |
| 961 |
if (!(tb_end <= start || tb_start >= end)) {
|
| 962 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 963 |
if (current_tb_not_found) {
|
| 964 |
current_tb_not_found = 0;
|
| 965 |
current_tb = NULL;
|
| 966 |
if (env->mem_io_pc) {
|
| 967 |
/* now we have a real cpu fault */
|
| 968 |
current_tb = tb_find_pc(env->mem_io_pc); |
| 969 |
} |
| 970 |
} |
| 971 |
if (current_tb == tb &&
|
| 972 |
(current_tb->cflags & CF_COUNT_MASK) != 1) {
|
| 973 |
/* If we are modifying the current TB, we must stop
|
| 974 |
its execution. We could be more precise by checking
|
| 975 |
that the modification is after the current PC, but it
|
| 976 |
would require a specialized function to partially
|
| 977 |
restore the CPU state */
|
| 978 |
|
| 979 |
current_tb_modified = 1;
|
| 980 |
cpu_restore_state(current_tb, env, |
| 981 |
env->mem_io_pc, NULL);
|
| 982 |
cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, |
| 983 |
¤t_flags); |
| 984 |
} |
| 985 |
#endif /* TARGET_HAS_PRECISE_SMC */ |
| 986 |
/* we need to do that to handle the case where a signal
|
| 987 |
occurs while doing tb_phys_invalidate() */
|
| 988 |
saved_tb = NULL;
|
| 989 |
if (env) {
|
| 990 |
saved_tb = env->current_tb; |
| 991 |
env->current_tb = NULL;
|
| 992 |
} |
| 993 |
tb_phys_invalidate(tb, -1);
|
| 994 |
if (env) {
|
| 995 |
env->current_tb = saved_tb; |
| 996 |
if (env->interrupt_request && env->current_tb)
|
| 997 |
cpu_interrupt(env, env->interrupt_request); |
| 998 |
} |
| 999 |
} |
| 1000 |
tb = tb_next; |
| 1001 |
} |
| 1002 |
#if !defined(CONFIG_USER_ONLY)
|
| 1003 |
/* if no code remaining, no need to continue to use slow writes */
|
| 1004 |
if (!p->first_tb) {
|
| 1005 |
invalidate_page_bitmap(p); |
| 1006 |
if (is_cpu_write_access) {
|
| 1007 |
tlb_unprotect_code_phys(env, start, env->mem_io_vaddr); |
| 1008 |
} |
| 1009 |
} |
| 1010 |
#endif
|
| 1011 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 1012 |
if (current_tb_modified) {
|
| 1013 |
/* we generate a block containing just the instruction
|
| 1014 |
modifying the memory. It will ensure that it cannot modify
|
| 1015 |
itself */
|
| 1016 |
env->current_tb = NULL;
|
| 1017 |
tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
|
| 1018 |
cpu_resume_from_signal(env, NULL);
|
| 1019 |
} |
| 1020 |
#endif
|
| 1021 |
} |
| 1022 |
|
| 1023 |
/* len must be <= 8 and start must be a multiple of len */
|
| 1024 |
static inline void tb_invalidate_phys_page_fast(target_phys_addr_t start, int len) |
| 1025 |
{
|
| 1026 |
PageDesc *p; |
| 1027 |
int offset, b;
|
| 1028 |
#if 0
|
| 1029 |
if (1) {
|
| 1030 |
qemu_log("modifying code at 0x%x size=%d EIP=%x PC=%08x\n",
|
| 1031 |
cpu_single_env->mem_io_vaddr, len,
|
| 1032 |
cpu_single_env->eip,
|
| 1033 |
cpu_single_env->eip + (long)cpu_single_env->segs[R_CS].base);
|
| 1034 |
}
|
| 1035 |
#endif
|
| 1036 |
p = page_find(start >> TARGET_PAGE_BITS); |
| 1037 |
if (!p)
|
| 1038 |
return;
|
| 1039 |
if (p->code_bitmap) {
|
| 1040 |
offset = start & ~TARGET_PAGE_MASK; |
| 1041 |
b = p->code_bitmap[offset >> 3] >> (offset & 7); |
| 1042 |
if (b & ((1 << len) - 1)) |
| 1043 |
goto do_invalidate;
|
| 1044 |
} else {
|
| 1045 |
do_invalidate:
|
| 1046 |
tb_invalidate_phys_page_range(start, start + len, 1);
|
| 1047 |
} |
| 1048 |
} |
| 1049 |
|
| 1050 |
#if !defined(CONFIG_SOFTMMU)
|
| 1051 |
static void tb_invalidate_phys_page(target_phys_addr_t addr, |
| 1052 |
unsigned long pc, void *puc) |
| 1053 |
{
|
| 1054 |
TranslationBlock *tb; |
| 1055 |
PageDesc *p; |
| 1056 |
int n;
|
| 1057 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 1058 |
TranslationBlock *current_tb = NULL;
|
| 1059 |
CPUState *env = cpu_single_env; |
| 1060 |
int current_tb_modified = 0; |
| 1061 |
target_ulong current_pc = 0;
|
| 1062 |
target_ulong current_cs_base = 0;
|
| 1063 |
int current_flags = 0; |
| 1064 |
#endif
|
| 1065 |
|
| 1066 |
addr &= TARGET_PAGE_MASK; |
| 1067 |
p = page_find(addr >> TARGET_PAGE_BITS); |
| 1068 |
if (!p)
|
| 1069 |
return;
|
| 1070 |
tb = p->first_tb; |
| 1071 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 1072 |
if (tb && pc != 0) { |
| 1073 |
current_tb = tb_find_pc(pc); |
| 1074 |
} |
| 1075 |
#endif
|
| 1076 |
while (tb != NULL) { |
| 1077 |
n = (long)tb & 3; |
| 1078 |
tb = (TranslationBlock *)((long)tb & ~3); |
| 1079 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 1080 |
if (current_tb == tb &&
|
| 1081 |
(current_tb->cflags & CF_COUNT_MASK) != 1) {
|
| 1082 |
/* If we are modifying the current TB, we must stop
|
| 1083 |
its execution. We could be more precise by checking
|
| 1084 |
that the modification is after the current PC, but it
|
| 1085 |
would require a specialized function to partially
|
| 1086 |
restore the CPU state */
|
| 1087 |
|
| 1088 |
current_tb_modified = 1;
|
| 1089 |
cpu_restore_state(current_tb, env, pc, puc); |
| 1090 |
cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base, |
| 1091 |
¤t_flags); |
| 1092 |
} |
| 1093 |
#endif /* TARGET_HAS_PRECISE_SMC */ |
| 1094 |
tb_phys_invalidate(tb, addr); |
| 1095 |
tb = tb->page_next[n]; |
| 1096 |
} |
| 1097 |
p->first_tb = NULL;
|
| 1098 |
#ifdef TARGET_HAS_PRECISE_SMC
|
| 1099 |
if (current_tb_modified) {
|
| 1100 |
/* we generate a block containing just the instruction
|
| 1101 |
modifying the memory. It will ensure that it cannot modify
|
| 1102 |
itself */
|
| 1103 |
env->current_tb = NULL;
|
| 1104 |
tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
|
| 1105 |
cpu_resume_from_signal(env, puc); |
| 1106 |
} |
| 1107 |
#endif
|
| 1108 |
} |
| 1109 |
#endif
|
| 1110 |
|
| 1111 |
/* add the tb in the target page and protect it if necessary */
|
| 1112 |
static inline void tb_alloc_page(TranslationBlock *tb, |
| 1113 |
unsigned int n, target_ulong page_addr) |
| 1114 |
{
|
| 1115 |
PageDesc *p; |
| 1116 |
TranslationBlock *last_first_tb; |
| 1117 |
|
| 1118 |
tb->page_addr[n] = page_addr; |
| 1119 |
p = page_find_alloc(page_addr >> TARGET_PAGE_BITS); |
| 1120 |
tb->page_next[n] = p->first_tb; |
| 1121 |
last_first_tb = p->first_tb; |
| 1122 |
p->first_tb = (TranslationBlock *)((long)tb | n);
|
| 1123 |
invalidate_page_bitmap(p); |
| 1124 |
|
| 1125 |
#if defined(TARGET_HAS_SMC) || 1 |
| 1126 |
|
| 1127 |
#if defined(CONFIG_USER_ONLY)
|
| 1128 |
if (p->flags & PAGE_WRITE) {
|
| 1129 |
target_ulong addr; |
| 1130 |
PageDesc *p2; |
| 1131 |
int prot;
|
| 1132 |
|
| 1133 |
/* force the host page as non writable (writes will have a
|
| 1134 |
page fault + mprotect overhead) */
|
| 1135 |
page_addr &= qemu_host_page_mask; |
| 1136 |
prot = 0;
|
| 1137 |
for(addr = page_addr; addr < page_addr + qemu_host_page_size;
|
| 1138 |
addr += TARGET_PAGE_SIZE) {
|
| 1139 |
|
| 1140 |
p2 = page_find (addr >> TARGET_PAGE_BITS); |
| 1141 |
if (!p2)
|
| 1142 |
continue;
|
| 1143 |
prot |= p2->flags; |
| 1144 |
p2->flags &= ~PAGE_WRITE; |
| 1145 |
page_get_flags(addr); |
| 1146 |
} |
| 1147 |
mprotect(g2h(page_addr), qemu_host_page_size, |
| 1148 |
(prot & PAGE_BITS) & ~PAGE_WRITE); |
| 1149 |
#ifdef DEBUG_TB_INVALIDATE
|
| 1150 |
printf("protecting code page: 0x" TARGET_FMT_lx "\n", |
| 1151 |
page_addr); |
| 1152 |
#endif
|
| 1153 |
} |
| 1154 |
#else
|
| 1155 |
/* if some code is already present, then the pages are already
|
| 1156 |
protected. So we handle the case where only the first TB is
|
| 1157 |
allocated in a physical page */
|
| 1158 |
if (!last_first_tb) {
|
| 1159 |
tlb_protect_code(page_addr); |
| 1160 |
} |
| 1161 |
#endif
|
| 1162 |
|
| 1163 |
#endif /* TARGET_HAS_SMC */ |
| 1164 |
} |
| 1165 |
|
| 1166 |
/* Allocate a new translation block. Flush the translation buffer if
|
| 1167 |
too many translation blocks or too much generated code. */
|
| 1168 |
TranslationBlock *tb_alloc(target_ulong pc) |
| 1169 |
{
|
| 1170 |
TranslationBlock *tb; |
| 1171 |
|
| 1172 |
if (nb_tbs >= code_gen_max_blocks ||
|
| 1173 |
(code_gen_ptr - code_gen_buffer) >= code_gen_buffer_max_size) |
| 1174 |
return NULL; |
| 1175 |
tb = &tbs[nb_tbs++]; |
| 1176 |
tb->pc = pc; |
| 1177 |
tb->cflags = 0;
|
| 1178 |
return tb;
|
| 1179 |
} |
| 1180 |
|
| 1181 |
void tb_free(TranslationBlock *tb)
|
| 1182 |
{
|
| 1183 |
/* In practice this is mostly used for single use temporary TB
|
| 1184 |
Ignore the hard cases and just back up if this TB happens to
|
| 1185 |
be the last one generated. */
|
| 1186 |
if (nb_tbs > 0 && tb == &tbs[nb_tbs - 1]) { |
| 1187 |
code_gen_ptr = tb->tc_ptr; |
| 1188 |
nb_tbs--; |
| 1189 |
} |
| 1190 |
} |
| 1191 |
|
| 1192 |
/* add a new TB and link it to the physical page tables. phys_page2 is
|
| 1193 |
(-1) to indicate that only one page contains the TB. */
|
| 1194 |
void tb_link_phys(TranslationBlock *tb,
|
| 1195 |
target_ulong phys_pc, target_ulong phys_page2) |
| 1196 |
{
|
| 1197 |
unsigned int h; |
| 1198 |
TranslationBlock **ptb; |
| 1199 |
|
| 1200 |
/* Grab the mmap lock to stop another thread invalidating this TB
|
| 1201 |
before we are done. */
|
| 1202 |
mmap_lock(); |
| 1203 |
/* add in the physical hash table */
|
| 1204 |
h = tb_phys_hash_func(phys_pc); |
| 1205 |
ptb = &tb_phys_hash[h]; |
| 1206 |
tb->phys_hash_next = *ptb; |
| 1207 |
*ptb = tb; |
| 1208 |
|
| 1209 |
/* add in the page list */
|
| 1210 |
tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK);
|
| 1211 |
if (phys_page2 != -1) |
| 1212 |
tb_alloc_page(tb, 1, phys_page2);
|
| 1213 |
else
|
| 1214 |
tb->page_addr[1] = -1; |
| 1215 |
|
| 1216 |
tb->jmp_first = (TranslationBlock *)((long)tb | 2); |
| 1217 |
tb->jmp_next[0] = NULL; |
| 1218 |
tb->jmp_next[1] = NULL; |
| 1219 |
|
| 1220 |
/* init original jump addresses */
|
| 1221 |
if (tb->tb_next_offset[0] != 0xffff) |
| 1222 |
tb_reset_jump(tb, 0);
|
| 1223 |
if (tb->tb_next_offset[1] != 0xffff) |
| 1224 |
tb_reset_jump(tb, 1);
|
| 1225 |
|
| 1226 |
#ifdef DEBUG_TB_CHECK
|
| 1227 |
tb_page_check(); |
| 1228 |
#endif
|
| 1229 |
mmap_unlock(); |
| 1230 |
} |
| 1231 |
|
| 1232 |
/* find the TB 'tb' such that tb[0].tc_ptr <= tc_ptr <
|
| 1233 |
tb[1].tc_ptr. Return NULL if not found */
|
| 1234 |
TranslationBlock *tb_find_pc(unsigned long tc_ptr) |
| 1235 |
{
|
| 1236 |
int m_min, m_max, m;
|
| 1237 |
unsigned long v; |
| 1238 |
TranslationBlock *tb; |
| 1239 |
|
| 1240 |
if (nb_tbs <= 0) |
| 1241 |
return NULL; |
| 1242 |
if (tc_ptr < (unsigned long)code_gen_buffer || |
| 1243 |
tc_ptr >= (unsigned long)code_gen_ptr) |
| 1244 |
return NULL; |
| 1245 |
/* binary search (cf Knuth) */
|
| 1246 |
m_min = 0;
|
| 1247 |
m_max = nb_tbs - 1;
|
| 1248 |
while (m_min <= m_max) {
|
| 1249 |
m = (m_min + m_max) >> 1;
|
| 1250 |
tb = &tbs[m]; |
| 1251 |
v = (unsigned long)tb->tc_ptr; |
| 1252 |
if (v == tc_ptr)
|
| 1253 |
return tb;
|
| 1254 |
else if (tc_ptr < v) { |
| 1255 |
m_max = m - 1;
|
| 1256 |
} else {
|
| 1257 |
m_min = m + 1;
|
| 1258 |
} |
| 1259 |
} |
| 1260 |
return &tbs[m_max];
|
| 1261 |
} |
| 1262 |
|
| 1263 |
static void tb_reset_jump_recursive(TranslationBlock *tb); |
| 1264 |
|
| 1265 |
static inline void tb_reset_jump_recursive2(TranslationBlock *tb, int n) |
| 1266 |
{
|
| 1267 |
TranslationBlock *tb1, *tb_next, **ptb; |
| 1268 |
unsigned int n1; |
| 1269 |
|
| 1270 |
tb1 = tb->jmp_next[n]; |
| 1271 |
if (tb1 != NULL) { |
| 1272 |
/* find head of list */
|
| 1273 |
for(;;) {
|
| 1274 |
n1 = (long)tb1 & 3; |
| 1275 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 1276 |
if (n1 == 2) |
| 1277 |
break;
|
| 1278 |
tb1 = tb1->jmp_next[n1]; |
| 1279 |
} |
| 1280 |
/* we are now sure now that tb jumps to tb1 */
|
| 1281 |
tb_next = tb1; |
| 1282 |
|
| 1283 |
/* remove tb from the jmp_first list */
|
| 1284 |
ptb = &tb_next->jmp_first; |
| 1285 |
for(;;) {
|
| 1286 |
tb1 = *ptb; |
| 1287 |
n1 = (long)tb1 & 3; |
| 1288 |
tb1 = (TranslationBlock *)((long)tb1 & ~3); |
| 1289 |
if (n1 == n && tb1 == tb)
|
| 1290 |
break;
|
| 1291 |
ptb = &tb1->jmp_next[n1]; |
| 1292 |
} |
| 1293 |
*ptb = tb->jmp_next[n]; |
| 1294 |
tb->jmp_next[n] = NULL;
|
| 1295 |
|
| 1296 |
/* suppress the jump to next tb in generated code */
|
| 1297 |
tb_reset_jump(tb, n); |
| 1298 |
|
| 1299 |
/* suppress jumps in the tb on which we could have jumped */
|
| 1300 |
tb_reset_jump_recursive(tb_next); |
| 1301 |
} |
| 1302 |
} |
| 1303 |
|
| 1304 |
static void tb_reset_jump_recursive(TranslationBlock *tb) |
| 1305 |
{
|
| 1306 |
tb_reset_jump_recursive2(tb, 0);
|
| 1307 |
tb_reset_jump_recursive2(tb, 1);
|
| 1308 |
} |
| 1309 |
|
| 1310 |
#if defined(TARGET_HAS_ICE)
|
| 1311 |
static void breakpoint_invalidate(CPUState *env, target_ulong pc) |
| 1312 |
{
|
| 1313 |
target_phys_addr_t addr; |
| 1314 |
target_ulong pd; |
| 1315 |
ram_addr_t ram_addr; |
| 1316 |
PhysPageDesc *p; |
| 1317 |
|
| 1318 |
addr = cpu_get_phys_page_debug(env, pc); |
| 1319 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
| 1320 |
if (!p) {
|
| 1321 |
pd = IO_MEM_UNASSIGNED; |
| 1322 |
} else {
|
| 1323 |
pd = p->phys_offset; |
| 1324 |
} |
| 1325 |
ram_addr = (pd & TARGET_PAGE_MASK) | (pc & ~TARGET_PAGE_MASK); |
| 1326 |
tb_invalidate_phys_page_range(ram_addr, ram_addr + 1, 0); |
| 1327 |
} |
| 1328 |
#endif
|
| 1329 |
|
| 1330 |
/* Add a watchpoint. */
|
| 1331 |
int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len,
|
| 1332 |
int flags, CPUWatchpoint **watchpoint)
|
| 1333 |
{
|
| 1334 |
target_ulong len_mask = ~(len - 1);
|
| 1335 |
CPUWatchpoint *wp; |
| 1336 |
|
| 1337 |
/* sanity checks: allow power-of-2 lengths, deny unaligned watchpoints */
|
| 1338 |
if ((len != 1 && len != 2 && len != 4 && len != 8) || (addr & ~len_mask)) { |
| 1339 |
fprintf(stderr, "qemu: tried to set invalid watchpoint at "
|
| 1340 |
TARGET_FMT_lx ", len=" TARGET_FMT_lu "\n", addr, len); |
| 1341 |
return -EINVAL;
|
| 1342 |
} |
| 1343 |
wp = qemu_malloc(sizeof(*wp));
|
| 1344 |
|
| 1345 |
wp->vaddr = addr; |
| 1346 |
wp->len_mask = len_mask; |
| 1347 |
wp->flags = flags; |
| 1348 |
|
| 1349 |
/* keep all GDB-injected watchpoints in front */
|
| 1350 |
if (flags & BP_GDB)
|
| 1351 |
QTAILQ_INSERT_HEAD(&env->watchpoints, wp, entry); |
| 1352 |
else
|
| 1353 |
QTAILQ_INSERT_TAIL(&env->watchpoints, wp, entry); |
| 1354 |
|
| 1355 |
tlb_flush_page(env, addr); |
| 1356 |
|
| 1357 |
if (watchpoint)
|
| 1358 |
*watchpoint = wp; |
| 1359 |
return 0; |
| 1360 |
} |
| 1361 |
|
| 1362 |
/* Remove a specific watchpoint. */
|
| 1363 |
int cpu_watchpoint_remove(CPUState *env, target_ulong addr, target_ulong len,
|
| 1364 |
int flags)
|
| 1365 |
{
|
| 1366 |
target_ulong len_mask = ~(len - 1);
|
| 1367 |
CPUWatchpoint *wp; |
| 1368 |
|
| 1369 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
|
| 1370 |
if (addr == wp->vaddr && len_mask == wp->len_mask
|
| 1371 |
&& flags == (wp->flags & ~BP_WATCHPOINT_HIT)) {
|
| 1372 |
cpu_watchpoint_remove_by_ref(env, wp); |
| 1373 |
return 0; |
| 1374 |
} |
| 1375 |
} |
| 1376 |
return -ENOENT;
|
| 1377 |
} |
| 1378 |
|
| 1379 |
/* Remove a specific watchpoint by reference. */
|
| 1380 |
void cpu_watchpoint_remove_by_ref(CPUState *env, CPUWatchpoint *watchpoint)
|
| 1381 |
{
|
| 1382 |
QTAILQ_REMOVE(&env->watchpoints, watchpoint, entry); |
| 1383 |
|
| 1384 |
tlb_flush_page(env, watchpoint->vaddr); |
| 1385 |
|
| 1386 |
qemu_free(watchpoint); |
| 1387 |
} |
| 1388 |
|
| 1389 |
/* Remove all matching watchpoints. */
|
| 1390 |
void cpu_watchpoint_remove_all(CPUState *env, int mask) |
| 1391 |
{
|
| 1392 |
CPUWatchpoint *wp, *next; |
| 1393 |
|
| 1394 |
QTAILQ_FOREACH_SAFE(wp, &env->watchpoints, entry, next) {
|
| 1395 |
if (wp->flags & mask)
|
| 1396 |
cpu_watchpoint_remove_by_ref(env, wp); |
| 1397 |
} |
| 1398 |
} |
| 1399 |
|
| 1400 |
/* Add a breakpoint. */
|
| 1401 |
int cpu_breakpoint_insert(CPUState *env, target_ulong pc, int flags, |
| 1402 |
CPUBreakpoint **breakpoint) |
| 1403 |
{
|
| 1404 |
#if defined(TARGET_HAS_ICE)
|
| 1405 |
CPUBreakpoint *bp; |
| 1406 |
|
| 1407 |
bp = qemu_malloc(sizeof(*bp));
|
| 1408 |
|
| 1409 |
bp->pc = pc; |
| 1410 |
bp->flags = flags; |
| 1411 |
|
| 1412 |
/* keep all GDB-injected breakpoints in front */
|
| 1413 |
if (flags & BP_GDB)
|
| 1414 |
QTAILQ_INSERT_HEAD(&env->breakpoints, bp, entry); |
| 1415 |
else
|
| 1416 |
QTAILQ_INSERT_TAIL(&env->breakpoints, bp, entry); |
| 1417 |
|
| 1418 |
breakpoint_invalidate(env, pc); |
| 1419 |
|
| 1420 |
if (breakpoint)
|
| 1421 |
*breakpoint = bp; |
| 1422 |
return 0; |
| 1423 |
#else
|
| 1424 |
return -ENOSYS;
|
| 1425 |
#endif
|
| 1426 |
} |
| 1427 |
|
| 1428 |
/* Remove a specific breakpoint. */
|
| 1429 |
int cpu_breakpoint_remove(CPUState *env, target_ulong pc, int flags) |
| 1430 |
{
|
| 1431 |
#if defined(TARGET_HAS_ICE)
|
| 1432 |
CPUBreakpoint *bp; |
| 1433 |
|
| 1434 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
|
| 1435 |
if (bp->pc == pc && bp->flags == flags) {
|
| 1436 |
cpu_breakpoint_remove_by_ref(env, bp); |
| 1437 |
return 0; |
| 1438 |
} |
| 1439 |
} |
| 1440 |
return -ENOENT;
|
| 1441 |
#else
|
| 1442 |
return -ENOSYS;
|
| 1443 |
#endif
|
| 1444 |
} |
| 1445 |
|
| 1446 |
/* Remove a specific breakpoint by reference. */
|
| 1447 |
void cpu_breakpoint_remove_by_ref(CPUState *env, CPUBreakpoint *breakpoint)
|
| 1448 |
{
|
| 1449 |
#if defined(TARGET_HAS_ICE)
|
| 1450 |
QTAILQ_REMOVE(&env->breakpoints, breakpoint, entry); |
| 1451 |
|
| 1452 |
breakpoint_invalidate(env, breakpoint->pc); |
| 1453 |
|
| 1454 |
qemu_free(breakpoint); |
| 1455 |
#endif
|
| 1456 |
} |
| 1457 |
|
| 1458 |
/* Remove all matching breakpoints. */
|
| 1459 |
void cpu_breakpoint_remove_all(CPUState *env, int mask) |
| 1460 |
{
|
| 1461 |
#if defined(TARGET_HAS_ICE)
|
| 1462 |
CPUBreakpoint *bp, *next; |
| 1463 |
|
| 1464 |
QTAILQ_FOREACH_SAFE(bp, &env->breakpoints, entry, next) {
|
| 1465 |
if (bp->flags & mask)
|
| 1466 |
cpu_breakpoint_remove_by_ref(env, bp); |
| 1467 |
} |
| 1468 |
#endif
|
| 1469 |
} |
| 1470 |
|
| 1471 |
/* enable or disable single step mode. EXCP_DEBUG is returned by the
|
| 1472 |
CPU loop after each instruction */
|
| 1473 |
void cpu_single_step(CPUState *env, int enabled) |
| 1474 |
{
|
| 1475 |
#if defined(TARGET_HAS_ICE)
|
| 1476 |
if (env->singlestep_enabled != enabled) {
|
| 1477 |
env->singlestep_enabled = enabled; |
| 1478 |
if (kvm_enabled())
|
| 1479 |
kvm_update_guest_debug(env, 0);
|
| 1480 |
else {
|
| 1481 |
/* must flush all the translated code to avoid inconsistencies */
|
| 1482 |
/* XXX: only flush what is necessary */
|
| 1483 |
tb_flush(env); |
| 1484 |
} |
| 1485 |
} |
| 1486 |
#endif
|
| 1487 |
} |
| 1488 |
|
| 1489 |
/* enable or disable low levels log */
|
| 1490 |
void cpu_set_log(int log_flags) |
| 1491 |
{
|
| 1492 |
loglevel = log_flags; |
| 1493 |
if (loglevel && !logfile) {
|
| 1494 |
logfile = fopen(logfilename, log_append ? "a" : "w"); |
| 1495 |
if (!logfile) {
|
| 1496 |
perror(logfilename); |
| 1497 |
_exit(1);
|
| 1498 |
} |
| 1499 |
#if !defined(CONFIG_SOFTMMU)
|
| 1500 |
/* must avoid mmap() usage of glibc by setting a buffer "by hand" */
|
| 1501 |
{
|
| 1502 |
static char logfile_buf[4096]; |
| 1503 |
setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
|
| 1504 |
} |
| 1505 |
#elif !defined(_WIN32)
|
| 1506 |
/* Win32 doesn't support line-buffering and requires size >= 2 */
|
| 1507 |
setvbuf(logfile, NULL, _IOLBF, 0); |
| 1508 |
#endif
|
| 1509 |
log_append = 1;
|
| 1510 |
} |
| 1511 |
if (!loglevel && logfile) {
|
| 1512 |
fclose(logfile); |
| 1513 |
logfile = NULL;
|
| 1514 |
} |
| 1515 |
} |
| 1516 |
|
| 1517 |
void cpu_set_log_filename(const char *filename) |
| 1518 |
{
|
| 1519 |
logfilename = strdup(filename); |
| 1520 |
if (logfile) {
|
| 1521 |
fclose(logfile); |
| 1522 |
logfile = NULL;
|
| 1523 |
} |
| 1524 |
cpu_set_log(loglevel); |
| 1525 |
} |
| 1526 |
|
| 1527 |
static void cpu_unlink_tb(CPUState *env) |
| 1528 |
{
|
| 1529 |
#if defined(CONFIG_USE_NPTL)
|
| 1530 |
/* FIXME: TB unchaining isn't SMP safe. For now just ignore the
|
| 1531 |
problem and hope the cpu will stop of its own accord. For userspace
|
| 1532 |
emulation this often isn't actually as bad as it sounds. Often
|
| 1533 |
signals are used primarily to interrupt blocking syscalls. */
|
| 1534 |
#else
|
| 1535 |
TranslationBlock *tb; |
| 1536 |
static spinlock_t interrupt_lock = SPIN_LOCK_UNLOCKED;
|
| 1537 |
|
| 1538 |
tb = env->current_tb; |
| 1539 |
/* if the cpu is currently executing code, we must unlink it and
|
| 1540 |
all the potentially executing TB */
|
| 1541 |
if (tb && !testandset(&interrupt_lock)) {
|
| 1542 |
env->current_tb = NULL;
|
| 1543 |
tb_reset_jump_recursive(tb); |
| 1544 |
resetlock(&interrupt_lock); |
| 1545 |
} |
| 1546 |
#endif
|
| 1547 |
} |
| 1548 |
|
| 1549 |
/* mask must never be zero, except for A20 change call */
|
| 1550 |
void cpu_interrupt(CPUState *env, int mask) |
| 1551 |
{
|
| 1552 |
int old_mask;
|
| 1553 |
|
| 1554 |
old_mask = env->interrupt_request; |
| 1555 |
env->interrupt_request |= mask; |
| 1556 |
|
| 1557 |
#ifndef CONFIG_USER_ONLY
|
| 1558 |
/*
|
| 1559 |
* If called from iothread context, wake the target cpu in
|
| 1560 |
* case its halted.
|
| 1561 |
*/
|
| 1562 |
if (!qemu_cpu_self(env)) {
|
| 1563 |
qemu_cpu_kick(env); |
| 1564 |
return;
|
| 1565 |
} |
| 1566 |
#endif
|
| 1567 |
|
| 1568 |
if (use_icount) {
|
| 1569 |
env->icount_decr.u16.high = 0xffff;
|
| 1570 |
#ifndef CONFIG_USER_ONLY
|
| 1571 |
if (!can_do_io(env)
|
| 1572 |
&& (mask & ~old_mask) != 0) {
|
| 1573 |
cpu_abort(env, "Raised interrupt while not in I/O function");
|
| 1574 |
} |
| 1575 |
#endif
|
| 1576 |
} else {
|
| 1577 |
cpu_unlink_tb(env); |
| 1578 |
} |
| 1579 |
} |
| 1580 |
|
| 1581 |
void cpu_reset_interrupt(CPUState *env, int mask) |
| 1582 |
{
|
| 1583 |
env->interrupt_request &= ~mask; |
| 1584 |
} |
| 1585 |
|
| 1586 |
void cpu_exit(CPUState *env)
|
| 1587 |
{
|
| 1588 |
env->exit_request = 1;
|
| 1589 |
cpu_unlink_tb(env); |
| 1590 |
} |
| 1591 |
|
| 1592 |
const CPULogItem cpu_log_items[] = {
|
| 1593 |
{ CPU_LOG_TB_OUT_ASM, "out_asm",
|
| 1594 |
"show generated host assembly code for each compiled TB" },
|
| 1595 |
{ CPU_LOG_TB_IN_ASM, "in_asm",
|
| 1596 |
"show target assembly code for each compiled TB" },
|
| 1597 |
{ CPU_LOG_TB_OP, "op",
|
| 1598 |
"show micro ops for each compiled TB" },
|
| 1599 |
{ CPU_LOG_TB_OP_OPT, "op_opt",
|
| 1600 |
"show micro ops "
|
| 1601 |
#ifdef TARGET_I386
|
| 1602 |
"before eflags optimization and "
|
| 1603 |
#endif
|
| 1604 |
"after liveness analysis" },
|
| 1605 |
{ CPU_LOG_INT, "int",
|
| 1606 |
"show interrupts/exceptions in short format" },
|
| 1607 |
{ CPU_LOG_EXEC, "exec",
|
| 1608 |
"show trace before each executed TB (lots of logs)" },
|
| 1609 |
{ CPU_LOG_TB_CPU, "cpu",
|
| 1610 |
"show CPU state before block translation" },
|
| 1611 |
#ifdef TARGET_I386
|
| 1612 |
{ CPU_LOG_PCALL, "pcall",
|
| 1613 |
"show protected mode far calls/returns/exceptions" },
|
| 1614 |
{ CPU_LOG_RESET, "cpu_reset",
|
| 1615 |
"show CPU state before CPU resets" },
|
| 1616 |
#endif
|
| 1617 |
#ifdef DEBUG_IOPORT
|
| 1618 |
{ CPU_LOG_IOPORT, "ioport",
|
| 1619 |
"show all i/o ports accesses" },
|
| 1620 |
#endif
|
| 1621 |
{ 0, NULL, NULL },
|
| 1622 |
}; |
| 1623 |
|
| 1624 |
static int cmp1(const char *s1, int n, const char *s2) |
| 1625 |
{
|
| 1626 |
if (strlen(s2) != n)
|
| 1627 |
return 0; |
| 1628 |
return memcmp(s1, s2, n) == 0; |
| 1629 |
} |
| 1630 |
|
| 1631 |
/* takes a comma separated list of log masks. Return 0 if error. */
|
| 1632 |
int cpu_str_to_log_mask(const char *str) |
| 1633 |
{
|
| 1634 |
const CPULogItem *item;
|
| 1635 |
int mask;
|
| 1636 |
const char *p, *p1; |
| 1637 |
|
| 1638 |
p = str; |
| 1639 |
mask = 0;
|
| 1640 |
for(;;) {
|
| 1641 |
p1 = strchr(p, ',');
|
| 1642 |
if (!p1)
|
| 1643 |
p1 = p + strlen(p); |
| 1644 |
if(cmp1(p,p1-p,"all")) { |
| 1645 |
for(item = cpu_log_items; item->mask != 0; item++) { |
| 1646 |
mask |= item->mask; |
| 1647 |
} |
| 1648 |
} else {
|
| 1649 |
for(item = cpu_log_items; item->mask != 0; item++) { |
| 1650 |
if (cmp1(p, p1 - p, item->name))
|
| 1651 |
goto found;
|
| 1652 |
} |
| 1653 |
return 0; |
| 1654 |
} |
| 1655 |
found:
|
| 1656 |
mask |= item->mask; |
| 1657 |
if (*p1 != ',') |
| 1658 |
break;
|
| 1659 |
p = p1 + 1;
|
| 1660 |
} |
| 1661 |
return mask;
|
| 1662 |
} |
| 1663 |
|
| 1664 |
void cpu_abort(CPUState *env, const char *fmt, ...) |
| 1665 |
{
|
| 1666 |
va_list ap; |
| 1667 |
va_list ap2; |
| 1668 |
|
| 1669 |
va_start(ap, fmt); |
| 1670 |
va_copy(ap2, ap); |
| 1671 |
fprintf(stderr, "qemu: fatal: ");
|
| 1672 |
vfprintf(stderr, fmt, ap); |
| 1673 |
fprintf(stderr, "\n");
|
| 1674 |
#ifdef TARGET_I386
|
| 1675 |
cpu_dump_state(env, stderr, fprintf, X86_DUMP_FPU | X86_DUMP_CCOP); |
| 1676 |
#else
|
| 1677 |
cpu_dump_state(env, stderr, fprintf, 0);
|
| 1678 |
#endif
|
| 1679 |
if (qemu_log_enabled()) {
|
| 1680 |
qemu_log("qemu: fatal: ");
|
| 1681 |
qemu_log_vprintf(fmt, ap2); |
| 1682 |
qemu_log("\n");
|
| 1683 |
#ifdef TARGET_I386
|
| 1684 |
log_cpu_state(env, X86_DUMP_FPU | X86_DUMP_CCOP); |
| 1685 |
#else
|
| 1686 |
log_cpu_state(env, 0);
|
| 1687 |
#endif
|
| 1688 |
qemu_log_flush(); |
| 1689 |
qemu_log_close(); |
| 1690 |
} |
| 1691 |
va_end(ap2); |
| 1692 |
va_end(ap); |
| 1693 |
abort(); |
| 1694 |
} |
| 1695 |
|
| 1696 |
CPUState *cpu_copy(CPUState *env) |
| 1697 |
{
|
| 1698 |
CPUState *new_env = cpu_init(env->cpu_model_str); |
| 1699 |
CPUState *next_cpu = new_env->next_cpu; |
| 1700 |
int cpu_index = new_env->cpu_index;
|
| 1701 |
#if defined(TARGET_HAS_ICE)
|
| 1702 |
CPUBreakpoint *bp; |
| 1703 |
CPUWatchpoint *wp; |
| 1704 |
#endif
|
| 1705 |
|
| 1706 |
memcpy(new_env, env, sizeof(CPUState));
|
| 1707 |
|
| 1708 |
/* Preserve chaining and index. */
|
| 1709 |
new_env->next_cpu = next_cpu; |
| 1710 |
new_env->cpu_index = cpu_index; |
| 1711 |
|
| 1712 |
/* Clone all break/watchpoints.
|
| 1713 |
Note: Once we support ptrace with hw-debug register access, make sure
|
| 1714 |
BP_CPU break/watchpoints are handled correctly on clone. */
|
| 1715 |
QTAILQ_INIT(&env->breakpoints); |
| 1716 |
QTAILQ_INIT(&env->watchpoints); |
| 1717 |
#if defined(TARGET_HAS_ICE)
|
| 1718 |
QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
|
| 1719 |
cpu_breakpoint_insert(new_env, bp->pc, bp->flags, NULL);
|
| 1720 |
} |
| 1721 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
|
| 1722 |
cpu_watchpoint_insert(new_env, wp->vaddr, (~wp->len_mask) + 1,
|
| 1723 |
wp->flags, NULL);
|
| 1724 |
} |
| 1725 |
#endif
|
| 1726 |
|
| 1727 |
return new_env;
|
| 1728 |
} |
| 1729 |
|
| 1730 |
#if !defined(CONFIG_USER_ONLY)
|
| 1731 |
|
| 1732 |
static inline void tlb_flush_jmp_cache(CPUState *env, target_ulong addr) |
| 1733 |
{
|
| 1734 |
unsigned int i; |
| 1735 |
|
| 1736 |
/* Discard jump cache entries for any tb which might potentially
|
| 1737 |
overlap the flushed page. */
|
| 1738 |
i = tb_jmp_cache_hash_page(addr - TARGET_PAGE_SIZE); |
| 1739 |
memset (&env->tb_jmp_cache[i], 0,
|
| 1740 |
TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *));
|
| 1741 |
|
| 1742 |
i = tb_jmp_cache_hash_page(addr); |
| 1743 |
memset (&env->tb_jmp_cache[i], 0,
|
| 1744 |
TB_JMP_PAGE_SIZE * sizeof(TranslationBlock *));
|
| 1745 |
} |
| 1746 |
|
| 1747 |
static CPUTLBEntry s_cputlb_empty_entry = {
|
| 1748 |
.addr_read = -1,
|
| 1749 |
.addr_write = -1,
|
| 1750 |
.addr_code = -1,
|
| 1751 |
.addend = -1,
|
| 1752 |
}; |
| 1753 |
|
| 1754 |
/* NOTE: if flush_global is true, also flush global entries (not
|
| 1755 |
implemented yet) */
|
| 1756 |
void tlb_flush(CPUState *env, int flush_global) |
| 1757 |
{
|
| 1758 |
int i;
|
| 1759 |
|
| 1760 |
#if defined(DEBUG_TLB)
|
| 1761 |
printf("tlb_flush:\n");
|
| 1762 |
#endif
|
| 1763 |
/* must reset current TB so that interrupts cannot modify the
|
| 1764 |
links while we are modifying them */
|
| 1765 |
env->current_tb = NULL;
|
| 1766 |
|
| 1767 |
for(i = 0; i < CPU_TLB_SIZE; i++) { |
| 1768 |
int mmu_idx;
|
| 1769 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { |
| 1770 |
env->tlb_table[mmu_idx][i] = s_cputlb_empty_entry; |
| 1771 |
} |
| 1772 |
} |
| 1773 |
|
| 1774 |
memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *)); |
| 1775 |
|
| 1776 |
tlb_flush_count++; |
| 1777 |
} |
| 1778 |
|
| 1779 |
static inline void tlb_flush_entry(CPUTLBEntry *tlb_entry, target_ulong addr) |
| 1780 |
{
|
| 1781 |
if (addr == (tlb_entry->addr_read &
|
| 1782 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) || |
| 1783 |
addr == (tlb_entry->addr_write & |
| 1784 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) || |
| 1785 |
addr == (tlb_entry->addr_code & |
| 1786 |
(TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
|
| 1787 |
*tlb_entry = s_cputlb_empty_entry; |
| 1788 |
} |
| 1789 |
} |
| 1790 |
|
| 1791 |
void tlb_flush_page(CPUState *env, target_ulong addr)
|
| 1792 |
{
|
| 1793 |
int i;
|
| 1794 |
int mmu_idx;
|
| 1795 |
|
| 1796 |
#if defined(DEBUG_TLB)
|
| 1797 |
printf("tlb_flush_page: " TARGET_FMT_lx "\n", addr); |
| 1798 |
#endif
|
| 1799 |
/* must reset current TB so that interrupts cannot modify the
|
| 1800 |
links while we are modifying them */
|
| 1801 |
env->current_tb = NULL;
|
| 1802 |
|
| 1803 |
addr &= TARGET_PAGE_MASK; |
| 1804 |
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 1805 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) |
| 1806 |
tlb_flush_entry(&env->tlb_table[mmu_idx][i], addr); |
| 1807 |
|
| 1808 |
tlb_flush_jmp_cache(env, addr); |
| 1809 |
} |
| 1810 |
|
| 1811 |
/* update the TLBs so that writes to code in the virtual page 'addr'
|
| 1812 |
can be detected */
|
| 1813 |
static void tlb_protect_code(ram_addr_t ram_addr) |
| 1814 |
{
|
| 1815 |
cpu_physical_memory_reset_dirty(ram_addr, |
| 1816 |
ram_addr + TARGET_PAGE_SIZE, |
| 1817 |
CODE_DIRTY_FLAG); |
| 1818 |
} |
| 1819 |
|
| 1820 |
/* update the TLB so that writes in physical page 'phys_addr' are no longer
|
| 1821 |
tested for self modifying code */
|
| 1822 |
static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr, |
| 1823 |
target_ulong vaddr) |
| 1824 |
{
|
| 1825 |
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] |= CODE_DIRTY_FLAG; |
| 1826 |
} |
| 1827 |
|
| 1828 |
static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry, |
| 1829 |
unsigned long start, unsigned long length) |
| 1830 |
{
|
| 1831 |
unsigned long addr; |
| 1832 |
if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
|
| 1833 |
addr = (tlb_entry->addr_write & TARGET_PAGE_MASK) + tlb_entry->addend; |
| 1834 |
if ((addr - start) < length) {
|
| 1835 |
tlb_entry->addr_write = (tlb_entry->addr_write & TARGET_PAGE_MASK) | TLB_NOTDIRTY; |
| 1836 |
} |
| 1837 |
} |
| 1838 |
} |
| 1839 |
|
| 1840 |
/* Note: start and end must be within the same ram block. */
|
| 1841 |
void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
|
| 1842 |
int dirty_flags)
|
| 1843 |
{
|
| 1844 |
CPUState *env; |
| 1845 |
unsigned long length, start1; |
| 1846 |
int i, mask, len;
|
| 1847 |
uint8_t *p; |
| 1848 |
|
| 1849 |
start &= TARGET_PAGE_MASK; |
| 1850 |
end = TARGET_PAGE_ALIGN(end); |
| 1851 |
|
| 1852 |
length = end - start; |
| 1853 |
if (length == 0) |
| 1854 |
return;
|
| 1855 |
len = length >> TARGET_PAGE_BITS; |
| 1856 |
mask = ~dirty_flags; |
| 1857 |
p = phys_ram_dirty + (start >> TARGET_PAGE_BITS); |
| 1858 |
for(i = 0; i < len; i++) |
| 1859 |
p[i] &= mask; |
| 1860 |
|
| 1861 |
/* we modify the TLB cache so that the dirty bit will be set again
|
| 1862 |
when accessing the range */
|
| 1863 |
start1 = (unsigned long)qemu_get_ram_ptr(start); |
| 1864 |
/* Chek that we don't span multiple blocks - this breaks the
|
| 1865 |
address comparisons below. */
|
| 1866 |
if ((unsigned long)qemu_get_ram_ptr(end - 1) - start1 |
| 1867 |
!= (end - 1) - start) {
|
| 1868 |
abort(); |
| 1869 |
} |
| 1870 |
|
| 1871 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
| 1872 |
int mmu_idx;
|
| 1873 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { |
| 1874 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
| 1875 |
tlb_reset_dirty_range(&env->tlb_table[mmu_idx][i], |
| 1876 |
start1, length); |
| 1877 |
} |
| 1878 |
} |
| 1879 |
} |
| 1880 |
|
| 1881 |
int cpu_physical_memory_set_dirty_tracking(int enable) |
| 1882 |
{
|
| 1883 |
in_migration = enable; |
| 1884 |
if (kvm_enabled()) {
|
| 1885 |
return kvm_set_migration_log(enable);
|
| 1886 |
} |
| 1887 |
return 0; |
| 1888 |
} |
| 1889 |
|
| 1890 |
int cpu_physical_memory_get_dirty_tracking(void) |
| 1891 |
{
|
| 1892 |
return in_migration;
|
| 1893 |
} |
| 1894 |
|
| 1895 |
int cpu_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
|
| 1896 |
target_phys_addr_t end_addr) |
| 1897 |
{
|
| 1898 |
int ret = 0; |
| 1899 |
|
| 1900 |
if (kvm_enabled())
|
| 1901 |
ret = kvm_physical_sync_dirty_bitmap(start_addr, end_addr); |
| 1902 |
return ret;
|
| 1903 |
} |
| 1904 |
|
| 1905 |
static inline void tlb_update_dirty(CPUTLBEntry *tlb_entry) |
| 1906 |
{
|
| 1907 |
ram_addr_t ram_addr; |
| 1908 |
void *p;
|
| 1909 |
|
| 1910 |
if ((tlb_entry->addr_write & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
|
| 1911 |
p = (void *)(unsigned long)((tlb_entry->addr_write & TARGET_PAGE_MASK) |
| 1912 |
+ tlb_entry->addend); |
| 1913 |
ram_addr = qemu_ram_addr_from_host(p); |
| 1914 |
if (!cpu_physical_memory_is_dirty(ram_addr)) {
|
| 1915 |
tlb_entry->addr_write |= TLB_NOTDIRTY; |
| 1916 |
} |
| 1917 |
} |
| 1918 |
} |
| 1919 |
|
| 1920 |
/* update the TLB according to the current state of the dirty bits */
|
| 1921 |
void cpu_tlb_update_dirty(CPUState *env)
|
| 1922 |
{
|
| 1923 |
int i;
|
| 1924 |
int mmu_idx;
|
| 1925 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { |
| 1926 |
for(i = 0; i < CPU_TLB_SIZE; i++) |
| 1927 |
tlb_update_dirty(&env->tlb_table[mmu_idx][i]); |
| 1928 |
} |
| 1929 |
} |
| 1930 |
|
| 1931 |
static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry, target_ulong vaddr) |
| 1932 |
{
|
| 1933 |
if (tlb_entry->addr_write == (vaddr | TLB_NOTDIRTY))
|
| 1934 |
tlb_entry->addr_write = vaddr; |
| 1935 |
} |
| 1936 |
|
| 1937 |
/* update the TLB corresponding to virtual page vaddr
|
| 1938 |
so that it is no longer dirty */
|
| 1939 |
static inline void tlb_set_dirty(CPUState *env, target_ulong vaddr) |
| 1940 |
{
|
| 1941 |
int i;
|
| 1942 |
int mmu_idx;
|
| 1943 |
|
| 1944 |
vaddr &= TARGET_PAGE_MASK; |
| 1945 |
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 1946 |
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) |
| 1947 |
tlb_set_dirty1(&env->tlb_table[mmu_idx][i], vaddr); |
| 1948 |
} |
| 1949 |
|
| 1950 |
/* add a new TLB entry. At most one entry for a given virtual address
|
| 1951 |
is permitted. Return 0 if OK or 2 if the page could not be mapped
|
| 1952 |
(can only happen in non SOFTMMU mode for I/O pages or pages
|
| 1953 |
conflicting with the host address space). */
|
| 1954 |
int tlb_set_page_exec(CPUState *env, target_ulong vaddr,
|
| 1955 |
target_phys_addr_t paddr, int prot,
|
| 1956 |
int mmu_idx, int is_softmmu) |
| 1957 |
{
|
| 1958 |
PhysPageDesc *p; |
| 1959 |
unsigned long pd; |
| 1960 |
unsigned int index; |
| 1961 |
target_ulong address; |
| 1962 |
target_ulong code_address; |
| 1963 |
target_phys_addr_t addend; |
| 1964 |
int ret;
|
| 1965 |
CPUTLBEntry *te; |
| 1966 |
CPUWatchpoint *wp; |
| 1967 |
target_phys_addr_t iotlb; |
| 1968 |
|
| 1969 |
p = phys_page_find(paddr >> TARGET_PAGE_BITS); |
| 1970 |
if (!p) {
|
| 1971 |
pd = IO_MEM_UNASSIGNED; |
| 1972 |
} else {
|
| 1973 |
pd = p->phys_offset; |
| 1974 |
} |
| 1975 |
#if defined(DEBUG_TLB)
|
| 1976 |
printf("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x%08x prot=%x idx=%d smmu=%d pd=0x%08lx\n", |
| 1977 |
vaddr, (int)paddr, prot, mmu_idx, is_softmmu, pd);
|
| 1978 |
#endif
|
| 1979 |
|
| 1980 |
ret = 0;
|
| 1981 |
address = vaddr; |
| 1982 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) {
|
| 1983 |
/* IO memory case (romd handled later) */
|
| 1984 |
address |= TLB_MMIO; |
| 1985 |
} |
| 1986 |
addend = (unsigned long)qemu_get_ram_ptr(pd & TARGET_PAGE_MASK); |
| 1987 |
if ((pd & ~TARGET_PAGE_MASK) <= IO_MEM_ROM) {
|
| 1988 |
/* Normal RAM. */
|
| 1989 |
iotlb = pd & TARGET_PAGE_MASK; |
| 1990 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM)
|
| 1991 |
iotlb |= IO_MEM_NOTDIRTY; |
| 1992 |
else
|
| 1993 |
iotlb |= IO_MEM_ROM; |
| 1994 |
} else {
|
| 1995 |
/* IO handlers are currently passed a physical address.
|
| 1996 |
It would be nice to pass an offset from the base address
|
| 1997 |
of that region. This would avoid having to special case RAM,
|
| 1998 |
and avoid full address decoding in every device.
|
| 1999 |
We can't use the high bits of pd for this because
|
| 2000 |
IO_MEM_ROMD uses these as a ram address. */
|
| 2001 |
iotlb = (pd & ~TARGET_PAGE_MASK); |
| 2002 |
if (p) {
|
| 2003 |
iotlb += p->region_offset; |
| 2004 |
} else {
|
| 2005 |
iotlb += paddr; |
| 2006 |
} |
| 2007 |
} |
| 2008 |
|
| 2009 |
code_address = address; |
| 2010 |
/* Make accesses to pages with watchpoints go via the
|
| 2011 |
watchpoint trap routines. */
|
| 2012 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
|
| 2013 |
if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) {
|
| 2014 |
iotlb = io_mem_watch + paddr; |
| 2015 |
/* TODO: The memory case can be optimized by not trapping
|
| 2016 |
reads of pages with a write breakpoint. */
|
| 2017 |
address |= TLB_MMIO; |
| 2018 |
} |
| 2019 |
} |
| 2020 |
|
| 2021 |
index = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
| 2022 |
env->iotlb[mmu_idx][index] = iotlb - vaddr; |
| 2023 |
te = &env->tlb_table[mmu_idx][index]; |
| 2024 |
te->addend = addend - vaddr; |
| 2025 |
if (prot & PAGE_READ) {
|
| 2026 |
te->addr_read = address; |
| 2027 |
} else {
|
| 2028 |
te->addr_read = -1;
|
| 2029 |
} |
| 2030 |
|
| 2031 |
if (prot & PAGE_EXEC) {
|
| 2032 |
te->addr_code = code_address; |
| 2033 |
} else {
|
| 2034 |
te->addr_code = -1;
|
| 2035 |
} |
| 2036 |
if (prot & PAGE_WRITE) {
|
| 2037 |
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM ||
|
| 2038 |
(pd & IO_MEM_ROMD)) {
|
| 2039 |
/* Write access calls the I/O callback. */
|
| 2040 |
te->addr_write = address | TLB_MMIO; |
| 2041 |
} else if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM && |
| 2042 |
!cpu_physical_memory_is_dirty(pd)) {
|
| 2043 |
te->addr_write = address | TLB_NOTDIRTY; |
| 2044 |
} else {
|
| 2045 |
te->addr_write = address; |
| 2046 |
} |
| 2047 |
} else {
|
| 2048 |
te->addr_write = -1;
|
| 2049 |
} |
| 2050 |
return ret;
|
| 2051 |
} |
| 2052 |
|
| 2053 |
#else
|
| 2054 |
|
| 2055 |
void tlb_flush(CPUState *env, int flush_global) |
| 2056 |
{
|
| 2057 |
} |
| 2058 |
|
| 2059 |
void tlb_flush_page(CPUState *env, target_ulong addr)
|
| 2060 |
{
|
| 2061 |
} |
| 2062 |
|
| 2063 |
int tlb_set_page_exec(CPUState *env, target_ulong vaddr,
|
| 2064 |
target_phys_addr_t paddr, int prot,
|
| 2065 |
int mmu_idx, int is_softmmu) |
| 2066 |
{
|
| 2067 |
return 0; |
| 2068 |
} |
| 2069 |
|
| 2070 |
/*
|
| 2071 |
* Walks guest process memory "regions" one by one
|
| 2072 |
* and calls callback function 'fn' for each region.
|
| 2073 |
*/
|
| 2074 |
int walk_memory_regions(void *priv, |
| 2075 |
int (*fn)(void *, unsigned long, unsigned long, unsigned long)) |
| 2076 |
{
|
| 2077 |
unsigned long start, end; |
| 2078 |
PageDesc *p = NULL;
|
| 2079 |
int i, j, prot, prot1;
|
| 2080 |
int rc = 0; |
| 2081 |
|
| 2082 |
start = end = -1;
|
| 2083 |
prot = 0;
|
| 2084 |
|
| 2085 |
for (i = 0; i <= L1_SIZE; i++) { |
| 2086 |
p = (i < L1_SIZE) ? l1_map[i] : NULL;
|
| 2087 |
for (j = 0; j < L2_SIZE; j++) { |
| 2088 |
prot1 = (p == NULL) ? 0 : p[j].flags; |
| 2089 |
/*
|
| 2090 |
* "region" is one continuous chunk of memory
|
| 2091 |
* that has same protection flags set.
|
| 2092 |
*/
|
| 2093 |
if (prot1 != prot) {
|
| 2094 |
end = (i << (32 - L1_BITS)) | (j << TARGET_PAGE_BITS);
|
| 2095 |
if (start != -1) { |
| 2096 |
rc = (*fn)(priv, start, end, prot); |
| 2097 |
/* callback can stop iteration by returning != 0 */
|
| 2098 |
if (rc != 0) |
| 2099 |
return (rc);
|
| 2100 |
} |
| 2101 |
if (prot1 != 0) |
| 2102 |
start = end; |
| 2103 |
else
|
| 2104 |
start = -1;
|
| 2105 |
prot = prot1; |
| 2106 |
} |
| 2107 |
if (p == NULL) |
| 2108 |
break;
|
| 2109 |
} |
| 2110 |
} |
| 2111 |
return (rc);
|
| 2112 |
} |
| 2113 |
|
| 2114 |
static int dump_region(void *priv, unsigned long start, |
| 2115 |
unsigned long end, unsigned long prot) |
| 2116 |
{
|
| 2117 |
FILE *f = (FILE *)priv; |
| 2118 |
|
| 2119 |
(void) fprintf(f, "%08lx-%08lx %08lx %c%c%c\n", |
| 2120 |
start, end, end - start, |
| 2121 |
((prot & PAGE_READ) ? 'r' : '-'), |
| 2122 |
((prot & PAGE_WRITE) ? 'w' : '-'), |
| 2123 |
((prot & PAGE_EXEC) ? 'x' : '-')); |
| 2124 |
|
| 2125 |
return (0); |
| 2126 |
} |
| 2127 |
|
| 2128 |
/* dump memory mappings */
|
| 2129 |
void page_dump(FILE *f)
|
| 2130 |
{
|
| 2131 |
(void) fprintf(f, "%-8s %-8s %-8s %s\n", |
| 2132 |
"start", "end", "size", "prot"); |
| 2133 |
walk_memory_regions(f, dump_region); |
| 2134 |
} |
| 2135 |
|
| 2136 |
int page_get_flags(target_ulong address)
|
| 2137 |
{
|
| 2138 |
PageDesc *p; |
| 2139 |
|
| 2140 |
p = page_find(address >> TARGET_PAGE_BITS); |
| 2141 |
if (!p)
|
| 2142 |
return 0; |
| 2143 |
return p->flags;
|
| 2144 |
} |
| 2145 |
|
| 2146 |
/* modify the flags of a page and invalidate the code if
|
| 2147 |
necessary. The flag PAGE_WRITE_ORG is positioned automatically
|
| 2148 |
depending on PAGE_WRITE */
|
| 2149 |
void page_set_flags(target_ulong start, target_ulong end, int flags) |
| 2150 |
{
|
| 2151 |
PageDesc *p; |
| 2152 |
target_ulong addr; |
| 2153 |
|
| 2154 |
/* mmap_lock should already be held. */
|
| 2155 |
start = start & TARGET_PAGE_MASK; |
| 2156 |
end = TARGET_PAGE_ALIGN(end); |
| 2157 |
if (flags & PAGE_WRITE)
|
| 2158 |
flags |= PAGE_WRITE_ORG; |
| 2159 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
| 2160 |
p = page_find_alloc(addr >> TARGET_PAGE_BITS); |
| 2161 |
/* We may be called for host regions that are outside guest
|
| 2162 |
address space. */
|
| 2163 |
if (!p)
|
| 2164 |
return;
|
| 2165 |
/* if the write protection is set, then we invalidate the code
|
| 2166 |
inside */
|
| 2167 |
if (!(p->flags & PAGE_WRITE) &&
|
| 2168 |
(flags & PAGE_WRITE) && |
| 2169 |
p->first_tb) {
|
| 2170 |
tb_invalidate_phys_page(addr, 0, NULL); |
| 2171 |
} |
| 2172 |
p->flags = flags; |
| 2173 |
} |
| 2174 |
} |
| 2175 |
|
| 2176 |
int page_check_range(target_ulong start, target_ulong len, int flags) |
| 2177 |
{
|
| 2178 |
PageDesc *p; |
| 2179 |
target_ulong end; |
| 2180 |
target_ulong addr; |
| 2181 |
|
| 2182 |
if (start + len < start)
|
| 2183 |
/* we've wrapped around */
|
| 2184 |
return -1; |
| 2185 |
|
| 2186 |
end = TARGET_PAGE_ALIGN(start+len); /* must do before we loose bits in the next step */
|
| 2187 |
start = start & TARGET_PAGE_MASK; |
| 2188 |
|
| 2189 |
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
|
| 2190 |
p = page_find(addr >> TARGET_PAGE_BITS); |
| 2191 |
if( !p )
|
| 2192 |
return -1; |
| 2193 |
if( !(p->flags & PAGE_VALID) )
|
| 2194 |
return -1; |
| 2195 |
|
| 2196 |
if ((flags & PAGE_READ) && !(p->flags & PAGE_READ))
|
| 2197 |
return -1; |
| 2198 |
if (flags & PAGE_WRITE) {
|
| 2199 |
if (!(p->flags & PAGE_WRITE_ORG))
|
| 2200 |
return -1; |
| 2201 |
/* unprotect the page if it was put read-only because it
|
| 2202 |
contains translated code */
|
| 2203 |
if (!(p->flags & PAGE_WRITE)) {
|
| 2204 |
if (!page_unprotect(addr, 0, NULL)) |
| 2205 |
return -1; |
| 2206 |
} |
| 2207 |
return 0; |
| 2208 |
} |
| 2209 |
} |
| 2210 |
return 0; |
| 2211 |
} |
| 2212 |
|
| 2213 |
/* called from signal handler: invalidate the code and unprotect the
|
| 2214 |
page. Return TRUE if the fault was successfully handled. */
|
| 2215 |
int page_unprotect(target_ulong address, unsigned long pc, void *puc) |
| 2216 |
{
|
| 2217 |
unsigned int page_index, prot, pindex; |
| 2218 |
PageDesc *p, *p1; |
| 2219 |
target_ulong host_start, host_end, addr; |
| 2220 |
|
| 2221 |
/* Technically this isn't safe inside a signal handler. However we
|
| 2222 |
know this only ever happens in a synchronous SEGV handler, so in
|
| 2223 |
practice it seems to be ok. */
|
| 2224 |
mmap_lock(); |
| 2225 |
|
| 2226 |
host_start = address & qemu_host_page_mask; |
| 2227 |
page_index = host_start >> TARGET_PAGE_BITS; |
| 2228 |
p1 = page_find(page_index); |
| 2229 |
if (!p1) {
|
| 2230 |
mmap_unlock(); |
| 2231 |
return 0; |
| 2232 |
} |
| 2233 |
host_end = host_start + qemu_host_page_size; |
| 2234 |
p = p1; |
| 2235 |
prot = 0;
|
| 2236 |
for(addr = host_start;addr < host_end; addr += TARGET_PAGE_SIZE) {
|
| 2237 |
prot |= p->flags; |
| 2238 |
p++; |
| 2239 |
} |
| 2240 |
/* if the page was really writable, then we change its
|
| 2241 |
protection back to writable */
|
| 2242 |
if (prot & PAGE_WRITE_ORG) {
|
| 2243 |
pindex = (address - host_start) >> TARGET_PAGE_BITS; |
| 2244 |
if (!(p1[pindex].flags & PAGE_WRITE)) {
|
| 2245 |
mprotect((void *)g2h(host_start), qemu_host_page_size,
|
| 2246 |
(prot & PAGE_BITS) | PAGE_WRITE); |
| 2247 |
p1[pindex].flags |= PAGE_WRITE; |
| 2248 |
/* and since the content will be modified, we must invalidate
|
| 2249 |
the corresponding translated code. */
|
| 2250 |
tb_invalidate_phys_page(address, pc, puc); |
| 2251 |
#ifdef DEBUG_TB_CHECK
|
| 2252 |
tb_invalidate_check(address); |
| 2253 |
#endif
|
| 2254 |
mmap_unlock(); |
| 2255 |
return 1; |
| 2256 |
} |
| 2257 |
} |
| 2258 |
mmap_unlock(); |
| 2259 |
return 0; |
| 2260 |
} |
| 2261 |
|
| 2262 |
static inline void tlb_set_dirty(CPUState *env, |
| 2263 |
unsigned long addr, target_ulong vaddr) |
| 2264 |
{
|
| 2265 |
} |
| 2266 |
#endif /* defined(CONFIG_USER_ONLY) */ |
| 2267 |
|
| 2268 |
#if !defined(CONFIG_USER_ONLY)
|
| 2269 |
|
| 2270 |
static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
| 2271 |
ram_addr_t memory, ram_addr_t region_offset); |
| 2272 |
static void *subpage_init (target_phys_addr_t base, ram_addr_t *phys, |
| 2273 |
ram_addr_t orig_memory, ram_addr_t region_offset); |
| 2274 |
#define CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, end_addr2, \
|
| 2275 |
need_subpage) \ |
| 2276 |
do { \
|
| 2277 |
if (addr > start_addr) \
|
| 2278 |
start_addr2 = 0; \
|
| 2279 |
else { \
|
| 2280 |
start_addr2 = start_addr & ~TARGET_PAGE_MASK; \ |
| 2281 |
if (start_addr2 > 0) \ |
| 2282 |
need_subpage = 1; \
|
| 2283 |
} \ |
| 2284 |
\ |
| 2285 |
if ((start_addr + orig_size) - addr >= TARGET_PAGE_SIZE) \
|
| 2286 |
end_addr2 = TARGET_PAGE_SIZE - 1; \
|
| 2287 |
else { \
|
| 2288 |
end_addr2 = (start_addr + orig_size - 1) & ~TARGET_PAGE_MASK; \
|
| 2289 |
if (end_addr2 < TARGET_PAGE_SIZE - 1) \ |
| 2290 |
need_subpage = 1; \
|
| 2291 |
} \ |
| 2292 |
} while (0) |
| 2293 |
|
| 2294 |
/* register physical memory.
|
| 2295 |
For RAM, 'size' must be a multiple of the target page size.
|
| 2296 |
If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
|
| 2297 |
io memory page. The address used when calling the IO function is
|
| 2298 |
the offset from the start of the region, plus region_offset. Both
|
| 2299 |
start_addr and region_offset are rounded down to a page boundary
|
| 2300 |
before calculating this offset. This should not be a problem unless
|
| 2301 |
the low bits of start_addr and region_offset differ. */
|
| 2302 |
void cpu_register_physical_memory_offset(target_phys_addr_t start_addr,
|
| 2303 |
ram_addr_t size, |
| 2304 |
ram_addr_t phys_offset, |
| 2305 |
ram_addr_t region_offset) |
| 2306 |
{
|
| 2307 |
target_phys_addr_t addr, end_addr; |
| 2308 |
PhysPageDesc *p; |
| 2309 |
CPUState *env; |
| 2310 |
ram_addr_t orig_size = size; |
| 2311 |
void *subpage;
|
| 2312 |
|
| 2313 |
if (kvm_enabled())
|
| 2314 |
kvm_set_phys_mem(start_addr, size, phys_offset); |
| 2315 |
|
| 2316 |
if (phys_offset == IO_MEM_UNASSIGNED) {
|
| 2317 |
region_offset = start_addr; |
| 2318 |
} |
| 2319 |
region_offset &= TARGET_PAGE_MASK; |
| 2320 |
size = (size + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK;
|
| 2321 |
end_addr = start_addr + (target_phys_addr_t)size; |
| 2322 |
for(addr = start_addr; addr != end_addr; addr += TARGET_PAGE_SIZE) {
|
| 2323 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
| 2324 |
if (p && p->phys_offset != IO_MEM_UNASSIGNED) {
|
| 2325 |
ram_addr_t orig_memory = p->phys_offset; |
| 2326 |
target_phys_addr_t start_addr2, end_addr2; |
| 2327 |
int need_subpage = 0; |
| 2328 |
|
| 2329 |
CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, end_addr2, |
| 2330 |
need_subpage); |
| 2331 |
if (need_subpage || phys_offset & IO_MEM_SUBWIDTH) {
|
| 2332 |
if (!(orig_memory & IO_MEM_SUBPAGE)) {
|
| 2333 |
subpage = subpage_init((addr & TARGET_PAGE_MASK), |
| 2334 |
&p->phys_offset, orig_memory, |
| 2335 |
p->region_offset); |
| 2336 |
} else {
|
| 2337 |
subpage = io_mem_opaque[(orig_memory & ~TARGET_PAGE_MASK) |
| 2338 |
>> IO_MEM_SHIFT]; |
| 2339 |
} |
| 2340 |
subpage_register(subpage, start_addr2, end_addr2, phys_offset, |
| 2341 |
region_offset); |
| 2342 |
p->region_offset = 0;
|
| 2343 |
} else {
|
| 2344 |
p->phys_offset = phys_offset; |
| 2345 |
if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM ||
|
| 2346 |
(phys_offset & IO_MEM_ROMD)) |
| 2347 |
phys_offset += TARGET_PAGE_SIZE; |
| 2348 |
} |
| 2349 |
} else {
|
| 2350 |
p = phys_page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
|
| 2351 |
p->phys_offset = phys_offset; |
| 2352 |
p->region_offset = region_offset; |
| 2353 |
if ((phys_offset & ~TARGET_PAGE_MASK) <= IO_MEM_ROM ||
|
| 2354 |
(phys_offset & IO_MEM_ROMD)) {
|
| 2355 |
phys_offset += TARGET_PAGE_SIZE; |
| 2356 |
} else {
|
| 2357 |
target_phys_addr_t start_addr2, end_addr2; |
| 2358 |
int need_subpage = 0; |
| 2359 |
|
| 2360 |
CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, |
| 2361 |
end_addr2, need_subpage); |
| 2362 |
|
| 2363 |
if (need_subpage || phys_offset & IO_MEM_SUBWIDTH) {
|
| 2364 |
subpage = subpage_init((addr & TARGET_PAGE_MASK), |
| 2365 |
&p->phys_offset, IO_MEM_UNASSIGNED, |
| 2366 |
addr & TARGET_PAGE_MASK); |
| 2367 |
subpage_register(subpage, start_addr2, end_addr2, |
| 2368 |
phys_offset, region_offset); |
| 2369 |
p->region_offset = 0;
|
| 2370 |
} |
| 2371 |
} |
| 2372 |
} |
| 2373 |
region_offset += TARGET_PAGE_SIZE; |
| 2374 |
} |
| 2375 |
|
| 2376 |
/* since each CPU stores ram addresses in its TLB cache, we must
|
| 2377 |
reset the modified entries */
|
| 2378 |
/* XXX: slow ! */
|
| 2379 |
for(env = first_cpu; env != NULL; env = env->next_cpu) { |
| 2380 |
tlb_flush(env, 1);
|
| 2381 |
} |
| 2382 |
} |
| 2383 |
|
| 2384 |
/* XXX: temporary until new memory mapping API */
|
| 2385 |
ram_addr_t cpu_get_physical_page_desc(target_phys_addr_t addr) |
| 2386 |
{
|
| 2387 |
PhysPageDesc *p; |
| 2388 |
|
| 2389 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
| 2390 |
if (!p)
|
| 2391 |
return IO_MEM_UNASSIGNED;
|
| 2392 |
return p->phys_offset;
|
| 2393 |
} |
| 2394 |
|
| 2395 |
void qemu_register_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size)
|
| 2396 |
{
|
| 2397 |
if (kvm_enabled())
|
| 2398 |
kvm_coalesce_mmio_region(addr, size); |
| 2399 |
} |
| 2400 |
|
| 2401 |
void qemu_unregister_coalesced_mmio(target_phys_addr_t addr, ram_addr_t size)
|
| 2402 |
{
|
| 2403 |
if (kvm_enabled())
|
| 2404 |
kvm_uncoalesce_mmio_region(addr, size); |
| 2405 |
} |
| 2406 |
|
| 2407 |
ram_addr_t qemu_ram_alloc(ram_addr_t size) |
| 2408 |
{
|
| 2409 |
RAMBlock *new_block; |
| 2410 |
|
| 2411 |
size = TARGET_PAGE_ALIGN(size); |
| 2412 |
new_block = qemu_malloc(sizeof(*new_block));
|
| 2413 |
|
| 2414 |
new_block->host = qemu_vmalloc(size); |
| 2415 |
new_block->offset = last_ram_offset; |
| 2416 |
new_block->length = size; |
| 2417 |
|
| 2418 |
new_block->next = ram_blocks; |
| 2419 |
ram_blocks = new_block; |
| 2420 |
|
| 2421 |
phys_ram_dirty = qemu_realloc(phys_ram_dirty, |
| 2422 |
(last_ram_offset + size) >> TARGET_PAGE_BITS); |
| 2423 |
memset(phys_ram_dirty + (last_ram_offset >> TARGET_PAGE_BITS), |
| 2424 |
0xff, size >> TARGET_PAGE_BITS);
|
| 2425 |
|
| 2426 |
last_ram_offset += size; |
| 2427 |
|
| 2428 |
if (kvm_enabled())
|
| 2429 |
kvm_setup_guest_memory(new_block->host, size); |
| 2430 |
|
| 2431 |
return new_block->offset;
|
| 2432 |
} |
| 2433 |
|
| 2434 |
void qemu_ram_free(ram_addr_t addr)
|
| 2435 |
{
|
| 2436 |
/* TODO: implement this. */
|
| 2437 |
} |
| 2438 |
|
| 2439 |
/* Return a host pointer to ram allocated with qemu_ram_alloc.
|
| 2440 |
With the exception of the softmmu code in this file, this should
|
| 2441 |
only be used for local memory (e.g. video ram) that the device owns,
|
| 2442 |
and knows it isn't going to access beyond the end of the block.
|
| 2443 |
|
| 2444 |
It should not be used for general purpose DMA.
|
| 2445 |
Use cpu_physical_memory_map/cpu_physical_memory_rw instead.
|
| 2446 |
*/
|
| 2447 |
void *qemu_get_ram_ptr(ram_addr_t addr)
|
| 2448 |
{
|
| 2449 |
RAMBlock *prev; |
| 2450 |
RAMBlock **prevp; |
| 2451 |
RAMBlock *block; |
| 2452 |
|
| 2453 |
prev = NULL;
|
| 2454 |
prevp = &ram_blocks; |
| 2455 |
block = ram_blocks; |
| 2456 |
while (block && (block->offset > addr
|
| 2457 |
|| block->offset + block->length <= addr)) {
|
| 2458 |
if (prev)
|
| 2459 |
prevp = &prev->next; |
| 2460 |
prev = block; |
| 2461 |
block = block->next; |
| 2462 |
} |
| 2463 |
if (!block) {
|
| 2464 |
fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); |
| 2465 |
abort(); |
| 2466 |
} |
| 2467 |
/* Move this entry to to start of the list. */
|
| 2468 |
if (prev) {
|
| 2469 |
prev->next = block->next; |
| 2470 |
block->next = *prevp; |
| 2471 |
*prevp = block; |
| 2472 |
} |
| 2473 |
return block->host + (addr - block->offset);
|
| 2474 |
} |
| 2475 |
|
| 2476 |
/* Some of the softmmu routines need to translate from a host pointer
|
| 2477 |
(typically a TLB entry) back to a ram offset. */
|
| 2478 |
ram_addr_t qemu_ram_addr_from_host(void *ptr)
|
| 2479 |
{
|
| 2480 |
RAMBlock *prev; |
| 2481 |
RAMBlock **prevp; |
| 2482 |
RAMBlock *block; |
| 2483 |
uint8_t *host = ptr; |
| 2484 |
|
| 2485 |
prev = NULL;
|
| 2486 |
prevp = &ram_blocks; |
| 2487 |
block = ram_blocks; |
| 2488 |
while (block && (block->host > host
|
| 2489 |
|| block->host + block->length <= host)) {
|
| 2490 |
if (prev)
|
| 2491 |
prevp = &prev->next; |
| 2492 |
prev = block; |
| 2493 |
block = block->next; |
| 2494 |
} |
| 2495 |
if (!block) {
|
| 2496 |
fprintf(stderr, "Bad ram pointer %p\n", ptr);
|
| 2497 |
abort(); |
| 2498 |
} |
| 2499 |
return block->offset + (host - block->host);
|
| 2500 |
} |
| 2501 |
|
| 2502 |
static uint32_t unassigned_mem_readb(void *opaque, target_phys_addr_t addr) |
| 2503 |
{
|
| 2504 |
#ifdef DEBUG_UNASSIGNED
|
| 2505 |
printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); |
| 2506 |
#endif
|
| 2507 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
| 2508 |
do_unassigned_access(addr, 0, 0, 0, 1); |
| 2509 |
#endif
|
| 2510 |
return 0; |
| 2511 |
} |
| 2512 |
|
| 2513 |
static uint32_t unassigned_mem_readw(void *opaque, target_phys_addr_t addr) |
| 2514 |
{
|
| 2515 |
#ifdef DEBUG_UNASSIGNED
|
| 2516 |
printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); |
| 2517 |
#endif
|
| 2518 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
| 2519 |
do_unassigned_access(addr, 0, 0, 0, 2); |
| 2520 |
#endif
|
| 2521 |
return 0; |
| 2522 |
} |
| 2523 |
|
| 2524 |
static uint32_t unassigned_mem_readl(void *opaque, target_phys_addr_t addr) |
| 2525 |
{
|
| 2526 |
#ifdef DEBUG_UNASSIGNED
|
| 2527 |
printf("Unassigned mem read " TARGET_FMT_plx "\n", addr); |
| 2528 |
#endif
|
| 2529 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
| 2530 |
do_unassigned_access(addr, 0, 0, 0, 4); |
| 2531 |
#endif
|
| 2532 |
return 0; |
| 2533 |
} |
| 2534 |
|
| 2535 |
static void unassigned_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val) |
| 2536 |
{
|
| 2537 |
#ifdef DEBUG_UNASSIGNED
|
| 2538 |
printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val); |
| 2539 |
#endif
|
| 2540 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
| 2541 |
do_unassigned_access(addr, 1, 0, 0, 1); |
| 2542 |
#endif
|
| 2543 |
} |
| 2544 |
|
| 2545 |
static void unassigned_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val) |
| 2546 |
{
|
| 2547 |
#ifdef DEBUG_UNASSIGNED
|
| 2548 |
printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val); |
| 2549 |
#endif
|
| 2550 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
| 2551 |
do_unassigned_access(addr, 1, 0, 0, 2); |
| 2552 |
#endif
|
| 2553 |
} |
| 2554 |
|
| 2555 |
static void unassigned_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) |
| 2556 |
{
|
| 2557 |
#ifdef DEBUG_UNASSIGNED
|
| 2558 |
printf("Unassigned mem write " TARGET_FMT_plx " = 0x%x\n", addr, val); |
| 2559 |
#endif
|
| 2560 |
#if defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
|
| 2561 |
do_unassigned_access(addr, 1, 0, 0, 4); |
| 2562 |
#endif
|
| 2563 |
} |
| 2564 |
|
| 2565 |
static CPUReadMemoryFunc * const unassigned_mem_read[3] = { |
| 2566 |
unassigned_mem_readb, |
| 2567 |
unassigned_mem_readw, |
| 2568 |
unassigned_mem_readl, |
| 2569 |
}; |
| 2570 |
|
| 2571 |
static CPUWriteMemoryFunc * const unassigned_mem_write[3] = { |
| 2572 |
unassigned_mem_writeb, |
| 2573 |
unassigned_mem_writew, |
| 2574 |
unassigned_mem_writel, |
| 2575 |
}; |
| 2576 |
|
| 2577 |
static void notdirty_mem_writeb(void *opaque, target_phys_addr_t ram_addr, |
| 2578 |
uint32_t val) |
| 2579 |
{
|
| 2580 |
int dirty_flags;
|
| 2581 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
| 2582 |
if (!(dirty_flags & CODE_DIRTY_FLAG)) {
|
| 2583 |
#if !defined(CONFIG_USER_ONLY)
|
| 2584 |
tb_invalidate_phys_page_fast(ram_addr, 1);
|
| 2585 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
| 2586 |
#endif
|
| 2587 |
} |
| 2588 |
stb_p(qemu_get_ram_ptr(ram_addr), val); |
| 2589 |
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
|
| 2590 |
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags; |
| 2591 |
/* we remove the notdirty callback only if the code has been
|
| 2592 |
flushed */
|
| 2593 |
if (dirty_flags == 0xff) |
| 2594 |
tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr); |
| 2595 |
} |
| 2596 |
|
| 2597 |
static void notdirty_mem_writew(void *opaque, target_phys_addr_t ram_addr, |
| 2598 |
uint32_t val) |
| 2599 |
{
|
| 2600 |
int dirty_flags;
|
| 2601 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
| 2602 |
if (!(dirty_flags & CODE_DIRTY_FLAG)) {
|
| 2603 |
#if !defined(CONFIG_USER_ONLY)
|
| 2604 |
tb_invalidate_phys_page_fast(ram_addr, 2);
|
| 2605 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
| 2606 |
#endif
|
| 2607 |
} |
| 2608 |
stw_p(qemu_get_ram_ptr(ram_addr), val); |
| 2609 |
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
|
| 2610 |
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags; |
| 2611 |
/* we remove the notdirty callback only if the code has been
|
| 2612 |
flushed */
|
| 2613 |
if (dirty_flags == 0xff) |
| 2614 |
tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr); |
| 2615 |
} |
| 2616 |
|
| 2617 |
static void notdirty_mem_writel(void *opaque, target_phys_addr_t ram_addr, |
| 2618 |
uint32_t val) |
| 2619 |
{
|
| 2620 |
int dirty_flags;
|
| 2621 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
| 2622 |
if (!(dirty_flags & CODE_DIRTY_FLAG)) {
|
| 2623 |
#if !defined(CONFIG_USER_ONLY)
|
| 2624 |
tb_invalidate_phys_page_fast(ram_addr, 4);
|
| 2625 |
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS]; |
| 2626 |
#endif
|
| 2627 |
} |
| 2628 |
stl_p(qemu_get_ram_ptr(ram_addr), val); |
| 2629 |
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
|
| 2630 |
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags; |
| 2631 |
/* we remove the notdirty callback only if the code has been
|
| 2632 |
flushed */
|
| 2633 |
if (dirty_flags == 0xff) |
| 2634 |
tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr); |
| 2635 |
} |
| 2636 |
|
| 2637 |
static CPUReadMemoryFunc * const error_mem_read[3] = { |
| 2638 |
NULL, /* never used */ |
| 2639 |
NULL, /* never used */ |
| 2640 |
NULL, /* never used */ |
| 2641 |
}; |
| 2642 |
|
| 2643 |
static CPUWriteMemoryFunc * const notdirty_mem_write[3] = { |
| 2644 |
notdirty_mem_writeb, |
| 2645 |
notdirty_mem_writew, |
| 2646 |
notdirty_mem_writel, |
| 2647 |
}; |
| 2648 |
|
| 2649 |
/* Generate a debug exception if a watchpoint has been hit. */
|
| 2650 |
static void check_watchpoint(int offset, int len_mask, int flags) |
| 2651 |
{
|
| 2652 |
CPUState *env = cpu_single_env; |
| 2653 |
target_ulong pc, cs_base; |
| 2654 |
TranslationBlock *tb; |
| 2655 |
target_ulong vaddr; |
| 2656 |
CPUWatchpoint *wp; |
| 2657 |
int cpu_flags;
|
| 2658 |
|
| 2659 |
if (env->watchpoint_hit) {
|
| 2660 |
/* We re-entered the check after replacing the TB. Now raise
|
| 2661 |
* the debug interrupt so that is will trigger after the
|
| 2662 |
* current instruction. */
|
| 2663 |
cpu_interrupt(env, CPU_INTERRUPT_DEBUG); |
| 2664 |
return;
|
| 2665 |
} |
| 2666 |
vaddr = (env->mem_io_vaddr & TARGET_PAGE_MASK) + offset; |
| 2667 |
QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
|
| 2668 |
if ((vaddr == (wp->vaddr & len_mask) ||
|
| 2669 |
(vaddr & wp->len_mask) == wp->vaddr) && (wp->flags & flags)) {
|
| 2670 |
wp->flags |= BP_WATCHPOINT_HIT; |
| 2671 |
if (!env->watchpoint_hit) {
|
| 2672 |
env->watchpoint_hit = wp; |
| 2673 |
tb = tb_find_pc(env->mem_io_pc); |
| 2674 |
if (!tb) {
|
| 2675 |
cpu_abort(env, "check_watchpoint: could not find TB for "
|
| 2676 |
"pc=%p", (void *)env->mem_io_pc); |
| 2677 |
} |
| 2678 |
cpu_restore_state(tb, env, env->mem_io_pc, NULL);
|
| 2679 |
tb_phys_invalidate(tb, -1);
|
| 2680 |
if (wp->flags & BP_STOP_BEFORE_ACCESS) {
|
| 2681 |
env->exception_index = EXCP_DEBUG; |
| 2682 |
} else {
|
| 2683 |
cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags); |
| 2684 |
tb_gen_code(env, pc, cs_base, cpu_flags, 1);
|
| 2685 |
} |
| 2686 |
cpu_resume_from_signal(env, NULL);
|
| 2687 |
} |
| 2688 |
} else {
|
| 2689 |
wp->flags &= ~BP_WATCHPOINT_HIT; |
| 2690 |
} |
| 2691 |
} |
| 2692 |
} |
| 2693 |
|
| 2694 |
/* Watchpoint access routines. Watchpoints are inserted using TLB tricks,
|
| 2695 |
so these check for a hit then pass through to the normal out-of-line
|
| 2696 |
phys routines. */
|
| 2697 |
static uint32_t watch_mem_readb(void *opaque, target_phys_addr_t addr) |
| 2698 |
{
|
| 2699 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x0, BP_MEM_READ);
|
| 2700 |
return ldub_phys(addr);
|
| 2701 |
} |
| 2702 |
|
| 2703 |
static uint32_t watch_mem_readw(void *opaque, target_phys_addr_t addr) |
| 2704 |
{
|
| 2705 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x1, BP_MEM_READ);
|
| 2706 |
return lduw_phys(addr);
|
| 2707 |
} |
| 2708 |
|
| 2709 |
static uint32_t watch_mem_readl(void *opaque, target_phys_addr_t addr) |
| 2710 |
{
|
| 2711 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x3, BP_MEM_READ);
|
| 2712 |
return ldl_phys(addr);
|
| 2713 |
} |
| 2714 |
|
| 2715 |
static void watch_mem_writeb(void *opaque, target_phys_addr_t addr, |
| 2716 |
uint32_t val) |
| 2717 |
{
|
| 2718 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x0, BP_MEM_WRITE);
|
| 2719 |
stb_phys(addr, val); |
| 2720 |
} |
| 2721 |
|
| 2722 |
static void watch_mem_writew(void *opaque, target_phys_addr_t addr, |
| 2723 |
uint32_t val) |
| 2724 |
{
|
| 2725 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x1, BP_MEM_WRITE);
|
| 2726 |
stw_phys(addr, val); |
| 2727 |
} |
| 2728 |
|
| 2729 |
static void watch_mem_writel(void *opaque, target_phys_addr_t addr, |
| 2730 |
uint32_t val) |
| 2731 |
{
|
| 2732 |
check_watchpoint(addr & ~TARGET_PAGE_MASK, ~0x3, BP_MEM_WRITE);
|
| 2733 |
stl_phys(addr, val); |
| 2734 |
} |
| 2735 |
|
| 2736 |
static CPUReadMemoryFunc * const watch_mem_read[3] = { |
| 2737 |
watch_mem_readb, |
| 2738 |
watch_mem_readw, |
| 2739 |
watch_mem_readl, |
| 2740 |
}; |
| 2741 |
|
| 2742 |
static CPUWriteMemoryFunc * const watch_mem_write[3] = { |
| 2743 |
watch_mem_writeb, |
| 2744 |
watch_mem_writew, |
| 2745 |
watch_mem_writel, |
| 2746 |
}; |
| 2747 |
|
| 2748 |
static inline uint32_t subpage_readlen (subpage_t *mmio, target_phys_addr_t addr, |
| 2749 |
unsigned int len) |
| 2750 |
{
|
| 2751 |
uint32_t ret; |
| 2752 |
unsigned int idx; |
| 2753 |
|
| 2754 |
idx = SUBPAGE_IDX(addr); |
| 2755 |
#if defined(DEBUG_SUBPAGE)
|
| 2756 |
printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d\n", __func__, |
| 2757 |
mmio, len, addr, idx); |
| 2758 |
#endif
|
| 2759 |
ret = (**mmio->mem_read[idx][len])(mmio->opaque[idx][0][len],
|
| 2760 |
addr + mmio->region_offset[idx][0][len]);
|
| 2761 |
|
| 2762 |
return ret;
|
| 2763 |
} |
| 2764 |
|
| 2765 |
static inline void subpage_writelen (subpage_t *mmio, target_phys_addr_t addr, |
| 2766 |
uint32_t value, unsigned int len) |
| 2767 |
{
|
| 2768 |
unsigned int idx; |
| 2769 |
|
| 2770 |
idx = SUBPAGE_IDX(addr); |
| 2771 |
#if defined(DEBUG_SUBPAGE)
|
| 2772 |
printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d value %08x\n", __func__, |
| 2773 |
mmio, len, addr, idx, value); |
| 2774 |
#endif
|
| 2775 |
(**mmio->mem_write[idx][len])(mmio->opaque[idx][1][len],
|
| 2776 |
addr + mmio->region_offset[idx][1][len],
|
| 2777 |
value); |
| 2778 |
} |
| 2779 |
|
| 2780 |
static uint32_t subpage_readb (void *opaque, target_phys_addr_t addr) |
| 2781 |
{
|
| 2782 |
#if defined(DEBUG_SUBPAGE)
|
| 2783 |
printf("%s: addr " TARGET_FMT_plx "\n", __func__, addr); |
| 2784 |
#endif
|
| 2785 |
|
| 2786 |
return subpage_readlen(opaque, addr, 0); |
| 2787 |
} |
| 2788 |
|
| 2789 |
static void subpage_writeb (void *opaque, target_phys_addr_t addr, |
| 2790 |
uint32_t value) |
| 2791 |
{
|
| 2792 |
#if defined(DEBUG_SUBPAGE)
|
| 2793 |
printf("%s: addr " TARGET_FMT_plx " val %08x\n", __func__, addr, value); |
| 2794 |
#endif
|
| 2795 |
subpage_writelen(opaque, addr, value, 0);
|
| 2796 |
} |
| 2797 |
|
| 2798 |
static uint32_t subpage_readw (void *opaque, target_phys_addr_t addr) |
| 2799 |
{
|
| 2800 |
#if defined(DEBUG_SUBPAGE)
|
| 2801 |
printf("%s: addr " TARGET_FMT_plx "\n", __func__, addr); |
| 2802 |
#endif
|
| 2803 |
|
| 2804 |
return subpage_readlen(opaque, addr, 1); |
| 2805 |
} |
| 2806 |
|
| 2807 |
static void subpage_writew (void *opaque, target_phys_addr_t addr, |
| 2808 |
uint32_t value) |
| 2809 |
{
|
| 2810 |
#if defined(DEBUG_SUBPAGE)
|
| 2811 |
printf("%s: addr " TARGET_FMT_plx " val %08x\n", __func__, addr, value); |
| 2812 |
#endif
|
| 2813 |
subpage_writelen(opaque, addr, value, 1);
|
| 2814 |
} |
| 2815 |
|
| 2816 |
static uint32_t subpage_readl (void *opaque, target_phys_addr_t addr) |
| 2817 |
{
|
| 2818 |
#if defined(DEBUG_SUBPAGE)
|
| 2819 |
printf("%s: addr " TARGET_FMT_plx "\n", __func__, addr); |
| 2820 |
#endif
|
| 2821 |
|
| 2822 |
return subpage_readlen(opaque, addr, 2); |
| 2823 |
} |
| 2824 |
|
| 2825 |
static void subpage_writel (void *opaque, |
| 2826 |
target_phys_addr_t addr, uint32_t value) |
| 2827 |
{
|
| 2828 |
#if defined(DEBUG_SUBPAGE)
|
| 2829 |
printf("%s: addr " TARGET_FMT_plx " val %08x\n", __func__, addr, value); |
| 2830 |
#endif
|
| 2831 |
subpage_writelen(opaque, addr, value, 2);
|
| 2832 |
} |
| 2833 |
|
| 2834 |
static CPUReadMemoryFunc * const subpage_read[] = { |
| 2835 |
&subpage_readb, |
| 2836 |
&subpage_readw, |
| 2837 |
&subpage_readl, |
| 2838 |
}; |
| 2839 |
|
| 2840 |
static CPUWriteMemoryFunc * const subpage_write[] = { |
| 2841 |
&subpage_writeb, |
| 2842 |
&subpage_writew, |
| 2843 |
&subpage_writel, |
| 2844 |
}; |
| 2845 |
|
| 2846 |
static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
| 2847 |
ram_addr_t memory, ram_addr_t region_offset) |
| 2848 |
{
|
| 2849 |
int idx, eidx;
|
| 2850 |
unsigned int i; |
| 2851 |
|
| 2852 |
if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE)
|
| 2853 |
return -1; |
| 2854 |
idx = SUBPAGE_IDX(start); |
| 2855 |
eidx = SUBPAGE_IDX(end); |
| 2856 |
#if defined(DEBUG_SUBPAGE)
|
| 2857 |
printf("%s: %p start %08x end %08x idx %08x eidx %08x mem %ld\n", __func__,
|
| 2858 |
mmio, start, end, idx, eidx, memory); |
| 2859 |
#endif
|
| 2860 |
memory >>= IO_MEM_SHIFT; |
| 2861 |
for (; idx <= eidx; idx++) {
|
| 2862 |
for (i = 0; i < 4; i++) { |
| 2863 |
if (io_mem_read[memory][i]) {
|
| 2864 |
mmio->mem_read[idx][i] = &io_mem_read[memory][i]; |
| 2865 |
mmio->opaque[idx][0][i] = io_mem_opaque[memory];
|
| 2866 |
mmio->region_offset[idx][0][i] = region_offset;
|
| 2867 |
} |
| 2868 |
if (io_mem_write[memory][i]) {
|
| 2869 |
mmio->mem_write[idx][i] = &io_mem_write[memory][i]; |
| 2870 |
mmio->opaque[idx][1][i] = io_mem_opaque[memory];
|
| 2871 |
mmio->region_offset[idx][1][i] = region_offset;
|
| 2872 |
} |
| 2873 |
} |
| 2874 |
} |
| 2875 |
|
| 2876 |
return 0; |
| 2877 |
} |
| 2878 |
|
| 2879 |
static void *subpage_init (target_phys_addr_t base, ram_addr_t *phys, |
| 2880 |
ram_addr_t orig_memory, ram_addr_t region_offset) |
| 2881 |
{
|
| 2882 |
subpage_t *mmio; |
| 2883 |
int subpage_memory;
|
| 2884 |
|
| 2885 |
mmio = qemu_mallocz(sizeof(subpage_t));
|
| 2886 |
|
| 2887 |
mmio->base = base; |
| 2888 |
subpage_memory = cpu_register_io_memory(subpage_read, subpage_write, mmio); |
| 2889 |
#if defined(DEBUG_SUBPAGE)
|
| 2890 |
printf("%s: %p base " TARGET_FMT_plx " len %08x %d\n", __func__, |
| 2891 |
mmio, base, TARGET_PAGE_SIZE, subpage_memory); |
| 2892 |
#endif
|
| 2893 |
*phys = subpage_memory | IO_MEM_SUBPAGE; |
| 2894 |
subpage_register(mmio, 0, TARGET_PAGE_SIZE - 1, orig_memory, |
| 2895 |
region_offset); |
| 2896 |
|
| 2897 |
return mmio;
|
| 2898 |
} |
| 2899 |
|
| 2900 |
static int get_free_io_mem_idx(void) |
| 2901 |
{
|
| 2902 |
int i;
|
| 2903 |
|
| 2904 |
for (i = 0; i<IO_MEM_NB_ENTRIES; i++) |
| 2905 |
if (!io_mem_used[i]) {
|
| 2906 |
io_mem_used[i] = 1;
|
| 2907 |
return i;
|
| 2908 |
} |
| 2909 |
|
| 2910 |
return -1; |
| 2911 |
} |
| 2912 |
|
| 2913 |
/* mem_read and mem_write are arrays of functions containing the
|
| 2914 |
function to access byte (index 0), word (index 1) and dword (index
|
| 2915 |
2). Functions can be omitted with a NULL function pointer.
|
| 2916 |
If io_index is non zero, the corresponding io zone is
|
| 2917 |
modified. If it is zero, a new io zone is allocated. The return
|
| 2918 |
value can be used with cpu_register_physical_memory(). (-1) is
|
| 2919 |
returned if error. */
|
| 2920 |
static int cpu_register_io_memory_fixed(int io_index, |
| 2921 |
CPUReadMemoryFunc * const *mem_read,
|
| 2922 |
CPUWriteMemoryFunc * const *mem_write,
|
| 2923 |
void *opaque)
|
| 2924 |
{
|
| 2925 |
int i, subwidth = 0; |
| 2926 |
|
| 2927 |
if (io_index <= 0) { |
| 2928 |
io_index = get_free_io_mem_idx(); |
| 2929 |
if (io_index == -1) |
| 2930 |
return io_index;
|
| 2931 |
} else {
|
| 2932 |
io_index >>= IO_MEM_SHIFT; |
| 2933 |
if (io_index >= IO_MEM_NB_ENTRIES)
|
| 2934 |
return -1; |
| 2935 |
} |
| 2936 |
|
| 2937 |
for(i = 0;i < 3; i++) { |
| 2938 |
if (!mem_read[i] || !mem_write[i])
|
| 2939 |
subwidth = IO_MEM_SUBWIDTH; |
| 2940 |
io_mem_read[io_index][i] = mem_read[i]; |
| 2941 |
io_mem_write[io_index][i] = mem_write[i]; |
| 2942 |
} |
| 2943 |
io_mem_opaque[io_index] = opaque; |
| 2944 |
return (io_index << IO_MEM_SHIFT) | subwidth;
|
| 2945 |
} |
| 2946 |
|
| 2947 |
int cpu_register_io_memory(CPUReadMemoryFunc * const *mem_read, |
| 2948 |
CPUWriteMemoryFunc * const *mem_write,
|
| 2949 |
void *opaque)
|
| 2950 |
{
|
| 2951 |
return cpu_register_io_memory_fixed(0, mem_read, mem_write, opaque); |
| 2952 |
} |
| 2953 |
|
| 2954 |
void cpu_unregister_io_memory(int io_table_address) |
| 2955 |
{
|
| 2956 |
int i;
|
| 2957 |
int io_index = io_table_address >> IO_MEM_SHIFT;
|
| 2958 |
|
| 2959 |
for (i=0;i < 3; i++) { |
| 2960 |
io_mem_read[io_index][i] = unassigned_mem_read[i]; |
| 2961 |
io_mem_write[io_index][i] = unassigned_mem_write[i]; |
| 2962 |
} |
| 2963 |
io_mem_opaque[io_index] = NULL;
|
| 2964 |
io_mem_used[io_index] = 0;
|
| 2965 |
} |
| 2966 |
|
| 2967 |
static void io_mem_init(void) |
| 2968 |
{
|
| 2969 |
int i;
|
| 2970 |
|
| 2971 |
cpu_register_io_memory_fixed(IO_MEM_ROM, error_mem_read, unassigned_mem_write, NULL);
|
| 2972 |
cpu_register_io_memory_fixed(IO_MEM_UNASSIGNED, unassigned_mem_read, unassigned_mem_write, NULL);
|
| 2973 |
cpu_register_io_memory_fixed(IO_MEM_NOTDIRTY, error_mem_read, notdirty_mem_write, NULL);
|
| 2974 |
for (i=0; i<5; i++) |
| 2975 |
io_mem_used[i] = 1;
|
| 2976 |
|
| 2977 |
io_mem_watch = cpu_register_io_memory(watch_mem_read, |
| 2978 |
watch_mem_write, NULL);
|
| 2979 |
} |
| 2980 |
|
| 2981 |
#endif /* !defined(CONFIG_USER_ONLY) */ |
| 2982 |
|
| 2983 |
/* physical memory access (slow version, mainly for debug) */
|
| 2984 |
#if defined(CONFIG_USER_ONLY)
|
| 2985 |
void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
|
| 2986 |
int len, int is_write) |
| 2987 |
{
|
| 2988 |
int l, flags;
|
| 2989 |
target_ulong page; |
| 2990 |
void * p;
|
| 2991 |
|
| 2992 |
while (len > 0) { |
| 2993 |
page = addr & TARGET_PAGE_MASK; |
| 2994 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 2995 |
if (l > len)
|
| 2996 |
l = len; |
| 2997 |
flags = page_get_flags(page); |
| 2998 |
if (!(flags & PAGE_VALID))
|
| 2999 |
return;
|
| 3000 |
if (is_write) {
|
| 3001 |
if (!(flags & PAGE_WRITE))
|
| 3002 |
return;
|
| 3003 |
/* XXX: this code should not depend on lock_user */
|
| 3004 |
if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) |
| 3005 |
/* FIXME - should this return an error rather than just fail? */
|
| 3006 |
return;
|
| 3007 |
memcpy(p, buf, l); |
| 3008 |
unlock_user(p, addr, l); |
| 3009 |
} else {
|
| 3010 |
if (!(flags & PAGE_READ))
|
| 3011 |
return;
|
| 3012 |
/* XXX: this code should not depend on lock_user */
|
| 3013 |
if (!(p = lock_user(VERIFY_READ, addr, l, 1))) |
| 3014 |
/* FIXME - should this return an error rather than just fail? */
|
| 3015 |
return;
|
| 3016 |
memcpy(buf, p, l); |
| 3017 |
unlock_user(p, addr, 0);
|
| 3018 |
} |
| 3019 |
len -= l; |
| 3020 |
buf += l; |
| 3021 |
addr += l; |
| 3022 |
} |
| 3023 |
} |
| 3024 |
|
| 3025 |
#else
|
| 3026 |
void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
|
| 3027 |
int len, int is_write) |
| 3028 |
{
|
| 3029 |
int l, io_index;
|
| 3030 |
uint8_t *ptr; |
| 3031 |
uint32_t val; |
| 3032 |
target_phys_addr_t page; |
| 3033 |
unsigned long pd; |
| 3034 |
PhysPageDesc *p; |
| 3035 |
|
| 3036 |
while (len > 0) { |
| 3037 |
page = addr & TARGET_PAGE_MASK; |
| 3038 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 3039 |
if (l > len)
|
| 3040 |
l = len; |
| 3041 |
p = phys_page_find(page >> TARGET_PAGE_BITS); |
| 3042 |
if (!p) {
|
| 3043 |
pd = IO_MEM_UNASSIGNED; |
| 3044 |
} else {
|
| 3045 |
pd = p->phys_offset; |
| 3046 |
} |
| 3047 |
|
| 3048 |
if (is_write) {
|
| 3049 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
|
| 3050 |
target_phys_addr_t addr1 = addr; |
| 3051 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
| 3052 |
if (p)
|
| 3053 |
addr1 = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
| 3054 |
/* XXX: could force cpu_single_env to NULL to avoid
|
| 3055 |
potential bugs */
|
| 3056 |
if (l >= 4 && ((addr1 & 3) == 0)) { |
| 3057 |
/* 32 bit write access */
|
| 3058 |
val = ldl_p(buf); |
| 3059 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr1, val);
|
| 3060 |
l = 4;
|
| 3061 |
} else if (l >= 2 && ((addr1 & 1) == 0)) { |
| 3062 |
/* 16 bit write access */
|
| 3063 |
val = lduw_p(buf); |
| 3064 |
io_mem_write[io_index][1](io_mem_opaque[io_index], addr1, val);
|
| 3065 |
l = 2;
|
| 3066 |
} else {
|
| 3067 |
/* 8 bit write access */
|
| 3068 |
val = ldub_p(buf); |
| 3069 |
io_mem_write[io_index][0](io_mem_opaque[io_index], addr1, val);
|
| 3070 |
l = 1;
|
| 3071 |
} |
| 3072 |
} else {
|
| 3073 |
unsigned long addr1; |
| 3074 |
addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
| 3075 |
/* RAM case */
|
| 3076 |
ptr = qemu_get_ram_ptr(addr1); |
| 3077 |
memcpy(ptr, buf, l); |
| 3078 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
| 3079 |
/* invalidate code */
|
| 3080 |
tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
|
| 3081 |
/* set dirty bit */
|
| 3082 |
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |= |
| 3083 |
(0xff & ~CODE_DIRTY_FLAG);
|
| 3084 |
} |
| 3085 |
} |
| 3086 |
} else {
|
| 3087 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
|
| 3088 |
!(pd & IO_MEM_ROMD)) {
|
| 3089 |
target_phys_addr_t addr1 = addr; |
| 3090 |
/* I/O case */
|
| 3091 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
| 3092 |
if (p)
|
| 3093 |
addr1 = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
| 3094 |
if (l >= 4 && ((addr1 & 3) == 0)) { |
| 3095 |
/* 32 bit read access */
|
| 3096 |
val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr1);
|
| 3097 |
stl_p(buf, val); |
| 3098 |
l = 4;
|
| 3099 |
} else if (l >= 2 && ((addr1 & 1) == 0)) { |
| 3100 |
/* 16 bit read access */
|
| 3101 |
val = io_mem_read[io_index][1](io_mem_opaque[io_index], addr1);
|
| 3102 |
stw_p(buf, val); |
| 3103 |
l = 2;
|
| 3104 |
} else {
|
| 3105 |
/* 8 bit read access */
|
| 3106 |
val = io_mem_read[io_index][0](io_mem_opaque[io_index], addr1);
|
| 3107 |
stb_p(buf, val); |
| 3108 |
l = 1;
|
| 3109 |
} |
| 3110 |
} else {
|
| 3111 |
/* RAM case */
|
| 3112 |
ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) + |
| 3113 |
(addr & ~TARGET_PAGE_MASK); |
| 3114 |
memcpy(buf, ptr, l); |
| 3115 |
} |
| 3116 |
} |
| 3117 |
len -= l; |
| 3118 |
buf += l; |
| 3119 |
addr += l; |
| 3120 |
} |
| 3121 |
} |
| 3122 |
|
| 3123 |
/* used for ROM loading : can write in RAM and ROM */
|
| 3124 |
void cpu_physical_memory_write_rom(target_phys_addr_t addr,
|
| 3125 |
const uint8_t *buf, int len) |
| 3126 |
{
|
| 3127 |
int l;
|
| 3128 |
uint8_t *ptr; |
| 3129 |
target_phys_addr_t page; |
| 3130 |
unsigned long pd; |
| 3131 |
PhysPageDesc *p; |
| 3132 |
|
| 3133 |
while (len > 0) { |
| 3134 |
page = addr & TARGET_PAGE_MASK; |
| 3135 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 3136 |
if (l > len)
|
| 3137 |
l = len; |
| 3138 |
p = phys_page_find(page >> TARGET_PAGE_BITS); |
| 3139 |
if (!p) {
|
| 3140 |
pd = IO_MEM_UNASSIGNED; |
| 3141 |
} else {
|
| 3142 |
pd = p->phys_offset; |
| 3143 |
} |
| 3144 |
|
| 3145 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM &&
|
| 3146 |
(pd & ~TARGET_PAGE_MASK) != IO_MEM_ROM && |
| 3147 |
!(pd & IO_MEM_ROMD)) {
|
| 3148 |
/* do nothing */
|
| 3149 |
} else {
|
| 3150 |
unsigned long addr1; |
| 3151 |
addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
| 3152 |
/* ROM/RAM case */
|
| 3153 |
ptr = qemu_get_ram_ptr(addr1); |
| 3154 |
memcpy(ptr, buf, l); |
| 3155 |
} |
| 3156 |
len -= l; |
| 3157 |
buf += l; |
| 3158 |
addr += l; |
| 3159 |
} |
| 3160 |
} |
| 3161 |
|
| 3162 |
typedef struct { |
| 3163 |
void *buffer;
|
| 3164 |
target_phys_addr_t addr; |
| 3165 |
target_phys_addr_t len; |
| 3166 |
} BounceBuffer; |
| 3167 |
|
| 3168 |
static BounceBuffer bounce;
|
| 3169 |
|
| 3170 |
typedef struct MapClient { |
| 3171 |
void *opaque;
|
| 3172 |
void (*callback)(void *opaque); |
| 3173 |
QLIST_ENTRY(MapClient) link; |
| 3174 |
} MapClient; |
| 3175 |
|
| 3176 |
static QLIST_HEAD(map_client_list, MapClient) map_client_list
|
| 3177 |
= QLIST_HEAD_INITIALIZER(map_client_list); |
| 3178 |
|
| 3179 |
void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque)) |
| 3180 |
{
|
| 3181 |
MapClient *client = qemu_malloc(sizeof(*client));
|
| 3182 |
|
| 3183 |
client->opaque = opaque; |
| 3184 |
client->callback = callback; |
| 3185 |
QLIST_INSERT_HEAD(&map_client_list, client, link); |
| 3186 |
return client;
|
| 3187 |
} |
| 3188 |
|
| 3189 |
void cpu_unregister_map_client(void *_client) |
| 3190 |
{
|
| 3191 |
MapClient *client = (MapClient *)_client; |
| 3192 |
|
| 3193 |
QLIST_REMOVE(client, link); |
| 3194 |
qemu_free(client); |
| 3195 |
} |
| 3196 |
|
| 3197 |
static void cpu_notify_map_clients(void) |
| 3198 |
{
|
| 3199 |
MapClient *client; |
| 3200 |
|
| 3201 |
while (!QLIST_EMPTY(&map_client_list)) {
|
| 3202 |
client = QLIST_FIRST(&map_client_list); |
| 3203 |
client->callback(client->opaque); |
| 3204 |
cpu_unregister_map_client(client); |
| 3205 |
} |
| 3206 |
} |
| 3207 |
|
| 3208 |
/* Map a physical memory region into a host virtual address.
|
| 3209 |
* May map a subset of the requested range, given by and returned in *plen.
|
| 3210 |
* May return NULL if resources needed to perform the mapping are exhausted.
|
| 3211 |
* Use only for reads OR writes - not for read-modify-write operations.
|
| 3212 |
* Use cpu_register_map_client() to know when retrying the map operation is
|
| 3213 |
* likely to succeed.
|
| 3214 |
*/
|
| 3215 |
void *cpu_physical_memory_map(target_phys_addr_t addr,
|
| 3216 |
target_phys_addr_t *plen, |
| 3217 |
int is_write)
|
| 3218 |
{
|
| 3219 |
target_phys_addr_t len = *plen; |
| 3220 |
target_phys_addr_t done = 0;
|
| 3221 |
int l;
|
| 3222 |
uint8_t *ret = NULL;
|
| 3223 |
uint8_t *ptr; |
| 3224 |
target_phys_addr_t page; |
| 3225 |
unsigned long pd; |
| 3226 |
PhysPageDesc *p; |
| 3227 |
unsigned long addr1; |
| 3228 |
|
| 3229 |
while (len > 0) { |
| 3230 |
page = addr & TARGET_PAGE_MASK; |
| 3231 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 3232 |
if (l > len)
|
| 3233 |
l = len; |
| 3234 |
p = phys_page_find(page >> TARGET_PAGE_BITS); |
| 3235 |
if (!p) {
|
| 3236 |
pd = IO_MEM_UNASSIGNED; |
| 3237 |
} else {
|
| 3238 |
pd = p->phys_offset; |
| 3239 |
} |
| 3240 |
|
| 3241 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
|
| 3242 |
if (done || bounce.buffer) {
|
| 3243 |
break;
|
| 3244 |
} |
| 3245 |
bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, TARGET_PAGE_SIZE); |
| 3246 |
bounce.addr = addr; |
| 3247 |
bounce.len = l; |
| 3248 |
if (!is_write) {
|
| 3249 |
cpu_physical_memory_rw(addr, bounce.buffer, l, 0);
|
| 3250 |
} |
| 3251 |
ptr = bounce.buffer; |
| 3252 |
} else {
|
| 3253 |
addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
| 3254 |
ptr = qemu_get_ram_ptr(addr1); |
| 3255 |
} |
| 3256 |
if (!done) {
|
| 3257 |
ret = ptr; |
| 3258 |
} else if (ret + done != ptr) { |
| 3259 |
break;
|
| 3260 |
} |
| 3261 |
|
| 3262 |
len -= l; |
| 3263 |
addr += l; |
| 3264 |
done += l; |
| 3265 |
} |
| 3266 |
*plen = done; |
| 3267 |
return ret;
|
| 3268 |
} |
| 3269 |
|
| 3270 |
/* Unmaps a memory region previously mapped by cpu_physical_memory_map().
|
| 3271 |
* Will also mark the memory as dirty if is_write == 1. access_len gives
|
| 3272 |
* the amount of memory that was actually read or written by the caller.
|
| 3273 |
*/
|
| 3274 |
void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len, |
| 3275 |
int is_write, target_phys_addr_t access_len)
|
| 3276 |
{
|
| 3277 |
if (buffer != bounce.buffer) {
|
| 3278 |
if (is_write) {
|
| 3279 |
ram_addr_t addr1 = qemu_ram_addr_from_host(buffer); |
| 3280 |
while (access_len) {
|
| 3281 |
unsigned l;
|
| 3282 |
l = TARGET_PAGE_SIZE; |
| 3283 |
if (l > access_len)
|
| 3284 |
l = access_len; |
| 3285 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
| 3286 |
/* invalidate code */
|
| 3287 |
tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
|
| 3288 |
/* set dirty bit */
|
| 3289 |
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |= |
| 3290 |
(0xff & ~CODE_DIRTY_FLAG);
|
| 3291 |
} |
| 3292 |
addr1 += l; |
| 3293 |
access_len -= l; |
| 3294 |
} |
| 3295 |
} |
| 3296 |
return;
|
| 3297 |
} |
| 3298 |
if (is_write) {
|
| 3299 |
cpu_physical_memory_write(bounce.addr, bounce.buffer, access_len); |
| 3300 |
} |
| 3301 |
qemu_free(bounce.buffer); |
| 3302 |
bounce.buffer = NULL;
|
| 3303 |
cpu_notify_map_clients(); |
| 3304 |
} |
| 3305 |
|
| 3306 |
/* warning: addr must be aligned */
|
| 3307 |
uint32_t ldl_phys(target_phys_addr_t addr) |
| 3308 |
{
|
| 3309 |
int io_index;
|
| 3310 |
uint8_t *ptr; |
| 3311 |
uint32_t val; |
| 3312 |
unsigned long pd; |
| 3313 |
PhysPageDesc *p; |
| 3314 |
|
| 3315 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
| 3316 |
if (!p) {
|
| 3317 |
pd = IO_MEM_UNASSIGNED; |
| 3318 |
} else {
|
| 3319 |
pd = p->phys_offset; |
| 3320 |
} |
| 3321 |
|
| 3322 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
|
| 3323 |
!(pd & IO_MEM_ROMD)) {
|
| 3324 |
/* I/O case */
|
| 3325 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
| 3326 |
if (p)
|
| 3327 |
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
| 3328 |
val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
|
| 3329 |
} else {
|
| 3330 |
/* RAM case */
|
| 3331 |
ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) + |
| 3332 |
(addr & ~TARGET_PAGE_MASK); |
| 3333 |
val = ldl_p(ptr); |
| 3334 |
} |
| 3335 |
return val;
|
| 3336 |
} |
| 3337 |
|
| 3338 |
/* warning: addr must be aligned */
|
| 3339 |
uint64_t ldq_phys(target_phys_addr_t addr) |
| 3340 |
{
|
| 3341 |
int io_index;
|
| 3342 |
uint8_t *ptr; |
| 3343 |
uint64_t val; |
| 3344 |
unsigned long pd; |
| 3345 |
PhysPageDesc *p; |
| 3346 |
|
| 3347 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
| 3348 |
if (!p) {
|
| 3349 |
pd = IO_MEM_UNASSIGNED; |
| 3350 |
} else {
|
| 3351 |
pd = p->phys_offset; |
| 3352 |
} |
| 3353 |
|
| 3354 |
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
|
| 3355 |
!(pd & IO_MEM_ROMD)) {
|
| 3356 |
/* I/O case */
|
| 3357 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
| 3358 |
if (p)
|
| 3359 |
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
| 3360 |
#ifdef TARGET_WORDS_BIGENDIAN
|
| 3361 |
val = (uint64_t)io_mem_read[io_index][2](io_mem_opaque[io_index], addr) << 32; |
| 3362 |
val |= io_mem_read[io_index][2](io_mem_opaque[io_index], addr + 4); |
| 3363 |
#else
|
| 3364 |
val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
|
| 3365 |
val |= (uint64_t)io_mem_read[io_index][2](io_mem_opaque[io_index], addr + 4) << 32; |
| 3366 |
#endif
|
| 3367 |
} else {
|
| 3368 |
/* RAM case */
|
| 3369 |
ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) + |
| 3370 |
(addr & ~TARGET_PAGE_MASK); |
| 3371 |
val = ldq_p(ptr); |
| 3372 |
} |
| 3373 |
return val;
|
| 3374 |
} |
| 3375 |
|
| 3376 |
/* XXX: optimize */
|
| 3377 |
uint32_t ldub_phys(target_phys_addr_t addr) |
| 3378 |
{
|
| 3379 |
uint8_t val; |
| 3380 |
cpu_physical_memory_read(addr, &val, 1);
|
| 3381 |
return val;
|
| 3382 |
} |
| 3383 |
|
| 3384 |
/* XXX: optimize */
|
| 3385 |
uint32_t lduw_phys(target_phys_addr_t addr) |
| 3386 |
{
|
| 3387 |
uint16_t val; |
| 3388 |
cpu_physical_memory_read(addr, (uint8_t *)&val, 2);
|
| 3389 |
return tswap16(val);
|
| 3390 |
} |
| 3391 |
|
| 3392 |
/* warning: addr must be aligned. The ram page is not masked as dirty
|
| 3393 |
and the code inside is not invalidated. It is useful if the dirty
|
| 3394 |
bits are used to track modified PTEs */
|
| 3395 |
void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val)
|
| 3396 |
{
|
| 3397 |
int io_index;
|
| 3398 |
uint8_t *ptr; |
| 3399 |
unsigned long pd; |
| 3400 |
PhysPageDesc *p; |
| 3401 |
|
| 3402 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
| 3403 |
if (!p) {
|
| 3404 |
pd = IO_MEM_UNASSIGNED; |
| 3405 |
} else {
|
| 3406 |
pd = p->phys_offset; |
| 3407 |
} |
| 3408 |
|
| 3409 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
|
| 3410 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
| 3411 |
if (p)
|
| 3412 |
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
| 3413 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
|
| 3414 |
} else {
|
| 3415 |
unsigned long addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
| 3416 |
ptr = qemu_get_ram_ptr(addr1); |
| 3417 |
stl_p(ptr, val); |
| 3418 |
|
| 3419 |
if (unlikely(in_migration)) {
|
| 3420 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
| 3421 |
/* invalidate code */
|
| 3422 |
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); |
| 3423 |
/* set dirty bit */
|
| 3424 |
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |= |
| 3425 |
(0xff & ~CODE_DIRTY_FLAG);
|
| 3426 |
} |
| 3427 |
} |
| 3428 |
} |
| 3429 |
} |
| 3430 |
|
| 3431 |
void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val)
|
| 3432 |
{
|
| 3433 |
int io_index;
|
| 3434 |
uint8_t *ptr; |
| 3435 |
unsigned long pd; |
| 3436 |
PhysPageDesc *p; |
| 3437 |
|
| 3438 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
| 3439 |
if (!p) {
|
| 3440 |
pd = IO_MEM_UNASSIGNED; |
| 3441 |
} else {
|
| 3442 |
pd = p->phys_offset; |
| 3443 |
} |
| 3444 |
|
| 3445 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
|
| 3446 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
| 3447 |
if (p)
|
| 3448 |
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
| 3449 |
#ifdef TARGET_WORDS_BIGENDIAN
|
| 3450 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val >> 32); |
| 3451 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr + 4, val); |
| 3452 |
#else
|
| 3453 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
|
| 3454 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr + 4, val >> 32); |
| 3455 |
#endif
|
| 3456 |
} else {
|
| 3457 |
ptr = qemu_get_ram_ptr(pd & TARGET_PAGE_MASK) + |
| 3458 |
(addr & ~TARGET_PAGE_MASK); |
| 3459 |
stq_p(ptr, val); |
| 3460 |
} |
| 3461 |
} |
| 3462 |
|
| 3463 |
/* warning: addr must be aligned */
|
| 3464 |
void stl_phys(target_phys_addr_t addr, uint32_t val)
|
| 3465 |
{
|
| 3466 |
int io_index;
|
| 3467 |
uint8_t *ptr; |
| 3468 |
unsigned long pd; |
| 3469 |
PhysPageDesc *p; |
| 3470 |
|
| 3471 |
p = phys_page_find(addr >> TARGET_PAGE_BITS); |
| 3472 |
if (!p) {
|
| 3473 |
pd = IO_MEM_UNASSIGNED; |
| 3474 |
} else {
|
| 3475 |
pd = p->phys_offset; |
| 3476 |
} |
| 3477 |
|
| 3478 |
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
|
| 3479 |
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
| 3480 |
if (p)
|
| 3481 |
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset; |
| 3482 |
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
|
| 3483 |
} else {
|
| 3484 |
unsigned long addr1; |
| 3485 |
addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK); |
| 3486 |
/* RAM case */
|
| 3487 |
ptr = qemu_get_ram_ptr(addr1); |
| 3488 |
stl_p(ptr, val); |
| 3489 |
if (!cpu_physical_memory_is_dirty(addr1)) {
|
| 3490 |
/* invalidate code */
|
| 3491 |
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0); |
| 3492 |
/* set dirty bit */
|
| 3493 |
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] |= |
| 3494 |
(0xff & ~CODE_DIRTY_FLAG);
|
| 3495 |
} |
| 3496 |
} |
| 3497 |
} |
| 3498 |
|
| 3499 |
/* XXX: optimize */
|
| 3500 |
void stb_phys(target_phys_addr_t addr, uint32_t val)
|
| 3501 |
{
|
| 3502 |
uint8_t v = val; |
| 3503 |
cpu_physical_memory_write(addr, &v, 1);
|
| 3504 |
} |
| 3505 |
|
| 3506 |
/* XXX: optimize */
|
| 3507 |
void stw_phys(target_phys_addr_t addr, uint32_t val)
|
| 3508 |
{
|
| 3509 |
uint16_t v = tswap16(val); |
| 3510 |
cpu_physical_memory_write(addr, (const uint8_t *)&v, 2); |
| 3511 |
} |
| 3512 |
|
| 3513 |
/* XXX: optimize */
|
| 3514 |
void stq_phys(target_phys_addr_t addr, uint64_t val)
|
| 3515 |
{
|
| 3516 |
val = tswap64(val); |
| 3517 |
cpu_physical_memory_write(addr, (const uint8_t *)&val, 8); |
| 3518 |
} |
| 3519 |
|
| 3520 |
#endif
|
| 3521 |
|
| 3522 |
/* virtual memory access for debug (includes writing to ROM) */
|
| 3523 |
int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
|
| 3524 |
uint8_t *buf, int len, int is_write) |
| 3525 |
{
|
| 3526 |
int l;
|
| 3527 |
target_phys_addr_t phys_addr; |
| 3528 |
target_ulong page; |
| 3529 |
|
| 3530 |
while (len > 0) { |
| 3531 |
page = addr & TARGET_PAGE_MASK; |
| 3532 |
phys_addr = cpu_get_phys_page_debug(env, page); |
| 3533 |
/* if no physical page mapped, return an error */
|
| 3534 |
if (phys_addr == -1) |
| 3535 |
return -1; |
| 3536 |
l = (page + TARGET_PAGE_SIZE) - addr; |
| 3537 |
if (l > len)
|
| 3538 |
l = len; |
| 3539 |
phys_addr += (addr & ~TARGET_PAGE_MASK); |
| 3540 |
#if !defined(CONFIG_USER_ONLY)
|
| 3541 |
if (is_write)
|
| 3542 |
cpu_physical_memory_write_rom(phys_addr, buf, l); |
| 3543 |
else
|
| 3544 |
#endif
|
| 3545 |
cpu_physical_memory_rw(phys_addr, buf, l, is_write); |
| 3546 |
len -= l; |
| 3547 |
buf += l; |
| 3548 |
addr += l; |
| 3549 |
} |
| 3550 |
return 0; |
| 3551 |
} |
| 3552 |
|
| 3553 |
/* in deterministic execution mode, instructions doing device I/Os
|
| 3554 |
must be at the end of the TB */
|
| 3555 |
void cpu_io_recompile(CPUState *env, void *retaddr) |
| 3556 |
{
|
| 3557 |
TranslationBlock *tb; |
| 3558 |
uint32_t n, cflags; |
| 3559 |
target_ulong pc, cs_base; |
| 3560 |
uint64_t flags; |
| 3561 |
|
| 3562 |
tb = tb_find_pc((unsigned long)retaddr); |
| 3563 |
if (!tb) {
|
| 3564 |
cpu_abort(env, "cpu_io_recompile: could not find TB for pc=%p",
|
| 3565 |
retaddr); |
| 3566 |
} |
| 3567 |
n = env->icount_decr.u16.low + tb->icount; |
| 3568 |
cpu_restore_state(tb, env, (unsigned long)retaddr, NULL); |
| 3569 |
/* Calculate how many instructions had been executed before the fault
|
| 3570 |
occurred. */
|
| 3571 |
n = n - env->icount_decr.u16.low; |
| 3572 |
/* Generate a new TB ending on the I/O insn. */
|
| 3573 |
n++; |
| 3574 |
/* On MIPS and SH, delay slot instructions can only be restarted if
|
| 3575 |
they were already the first instruction in the TB. If this is not
|
| 3576 |
the first instruction in a TB then re-execute the preceding
|
| 3577 |
branch. */
|
| 3578 |
#if defined(TARGET_MIPS)
|
| 3579 |
if ((env->hflags & MIPS_HFLAG_BMASK) != 0 && n > 1) { |
| 3580 |
env->active_tc.PC -= 4;
|
| 3581 |
env->icount_decr.u16.low++; |
| 3582 |
env->hflags &= ~MIPS_HFLAG_BMASK; |
| 3583 |
} |
| 3584 |
#elif defined(TARGET_SH4)
|
| 3585 |
if ((env->flags & ((DELAY_SLOT | DELAY_SLOT_CONDITIONAL))) != 0 |
| 3586 |
&& n > 1) {
|
| 3587 |
env->pc -= 2;
|
| 3588 |
env->icount_decr.u16.low++; |
| 3589 |
env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL); |
| 3590 |
} |
| 3591 |
#endif
|
| 3592 |
/* This should never happen. */
|
| 3593 |
if (n > CF_COUNT_MASK)
|
| 3594 |
cpu_abort(env, "TB too big during recompile");
|
| 3595 |
|
| 3596 |
cflags = n | CF_LAST_IO; |
| 3597 |
pc = tb->pc; |
| 3598 |
cs_base = tb->cs_base; |
| 3599 |
flags = tb->flags; |
| 3600 |
tb_phys_invalidate(tb, -1);
|
| 3601 |
/* FIXME: In theory this could raise an exception. In practice
|
| 3602 |
we have already translated the block once so it's probably ok. */
|
| 3603 |
tb_gen_code(env, pc, cs_base, flags, cflags); |
| 3604 |
/* TODO: If env->pc != tb->pc (i.e. the faulting instruction was not
|
| 3605 |
the first in the TB) then we end up generating a whole new TB and
|
| 3606 |
repeating the fault, which is horribly inefficient.
|
| 3607 |
Better would be to execute just this insn uncached, or generate a
|
| 3608 |
second new TB. */
|
| 3609 |
cpu_resume_from_signal(env, NULL);
|
| 3610 |
} |
| 3611 |
|
| 3612 |
void dump_exec_info(FILE *f,
|
| 3613 |
int (*cpu_fprintf)(FILE *f, const char *fmt, ...)) |
| 3614 |
{
|
| 3615 |
int i, target_code_size, max_target_code_size;
|
| 3616 |
int direct_jmp_count, direct_jmp2_count, cross_page;
|
| 3617 |
TranslationBlock *tb; |
| 3618 |
|
| 3619 |
target_code_size = 0;
|
| 3620 |
max_target_code_size = 0;
|
| 3621 |
cross_page = 0;
|
| 3622 |
direct_jmp_count = 0;
|
| 3623 |
direct_jmp2_count = 0;
|
| 3624 |
for(i = 0; i < nb_tbs; i++) { |
| 3625 |
tb = &tbs[i]; |
| 3626 |
target_code_size += tb->size; |
| 3627 |
if (tb->size > max_target_code_size)
|
| 3628 |
max_target_code_size = tb->size; |
| 3629 |
if (tb->page_addr[1] != -1) |
| 3630 |
cross_page++; |
| 3631 |
if (tb->tb_next_offset[0] != 0xffff) { |
| 3632 |
direct_jmp_count++; |
| 3633 |
if (tb->tb_next_offset[1] != 0xffff) { |
| 3634 |
direct_jmp2_count++; |
| 3635 |
} |
| 3636 |
} |
| 3637 |
} |
| 3638 |
/* XXX: avoid using doubles ? */
|
| 3639 |
cpu_fprintf(f, "Translation buffer state:\n");
|
| 3640 |
cpu_fprintf(f, "gen code size %ld/%ld\n",
|
| 3641 |
code_gen_ptr - code_gen_buffer, code_gen_buffer_max_size); |
| 3642 |
cpu_fprintf(f, "TB count %d/%d\n",
|
| 3643 |
nb_tbs, code_gen_max_blocks); |
| 3644 |
cpu_fprintf(f, "TB avg target size %d max=%d bytes\n",
|
| 3645 |
nb_tbs ? target_code_size / nb_tbs : 0,
|
| 3646 |
max_target_code_size); |
| 3647 |
cpu_fprintf(f, "TB avg host size %d bytes (expansion ratio: %0.1f)\n",
|
| 3648 |
nb_tbs ? (code_gen_ptr - code_gen_buffer) / nb_tbs : 0,
|
| 3649 |
target_code_size ? (double) (code_gen_ptr - code_gen_buffer) / target_code_size : 0); |
| 3650 |
cpu_fprintf(f, "cross page TB count %d (%d%%)\n",
|
| 3651 |
cross_page, |
| 3652 |
nb_tbs ? (cross_page * 100) / nb_tbs : 0); |
| 3653 |
cpu_fprintf(f, "direct jump count %d (%d%%) (2 jumps=%d %d%%)\n",
|
| 3654 |
direct_jmp_count, |
| 3655 |
nb_tbs ? (direct_jmp_count * 100) / nb_tbs : 0, |
| 3656 |
direct_jmp2_count, |
| 3657 |
nb_tbs ? (direct_jmp2_count * 100) / nb_tbs : 0); |
| 3658 |
cpu_fprintf(f, "\nStatistics:\n");
|
| 3659 |
cpu_fprintf(f, "TB flush count %d\n", tb_flush_count);
|
| 3660 |
cpu_fprintf(f, "TB invalidate count %d\n", tb_phys_invalidate_count);
|
| 3661 |
cpu_fprintf(f, "TLB flush count %d\n", tlb_flush_count);
|
| 3662 |
tcg_dump_info(f, cpu_fprintf); |
| 3663 |
} |
| 3664 |
|
| 3665 |
#if !defined(CONFIG_USER_ONLY)
|
| 3666 |
|
| 3667 |
#define MMUSUFFIX _cmmu
|
| 3668 |
#define GETPC() NULL |
| 3669 |
#define env cpu_single_env
|
| 3670 |
#define SOFTMMU_CODE_ACCESS
|
| 3671 |
|
| 3672 |
#define SHIFT 0 |
| 3673 |
#include "softmmu_template.h" |
| 3674 |
|
| 3675 |
#define SHIFT 1 |
| 3676 |
#include "softmmu_template.h" |
| 3677 |
|
| 3678 |
#define SHIFT 2 |
| 3679 |
#include "softmmu_template.h" |
| 3680 |
|
| 3681 |
#define SHIFT 3 |
| 3682 |
#include "softmmu_template.h" |
| 3683 |
|
| 3684 |
#undef env
|
| 3685 |
|
| 3686 |
#endif
|