cpu-all.h

   1 /*
   2  * defines common to all virtual CPUs
   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 #ifndef CPU_ALL_H
  20 #define CPU_ALL_H
  21
  22 #include "qemu-common.h"
  23 #include "qemu-tls.h"
  24 #include "cpu-common.h"
  25
  26 /* some important defines:
  27  *
  28  * WORDS_ALIGNED : if defined, the host cpu can only make word aligned
  29  * memory accesses.
  30  *
  31  * HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
  32  * otherwise little endian.
  33  *
  34  * (TARGET_WORDS_ALIGNED : same for target cpu (not supported yet))
  35  *
  36  * TARGET_WORDS_BIGENDIAN : same for target cpu
  37  */
  38
  39 #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
  40 #define BSWAP_NEEDED
  41 #endif
  42
  43 #ifdef BSWAP_NEEDED
  44
  45 static inline uint16_t tswap16(uint16_t s)
  46 {
  47     return bswap16(s);
  48 }
  49
  50 static inline uint32_t tswap32(uint32_t s)
  51 {
  52     return bswap32(s);
  53 }
  54
  55 static inline uint64_t tswap64(uint64_t s)
  56 {
  57     return bswap64(s);
  58 }
  59
  60 static inline void tswap16s(uint16_t *s)
  61 {
  62     *s = bswap16(*s);
  63 }
  64
  65 static inline void tswap32s(uint32_t *s)
  66 {
  67     *s = bswap32(*s);
  68 }
  69
  70 static inline void tswap64s(uint64_t *s)
  71 {
  72     *s = bswap64(*s);
  73 }
  74
  75 #else
  76
  77 static inline uint16_t tswap16(uint16_t s)
  78 {
  79     return s;
  80 }
  81
  82 static inline uint32_t tswap32(uint32_t s)
  83 {
  84     return s;
  85 }
  86
  87 static inline uint64_t tswap64(uint64_t s)
  88 {
  89     return s;
  90 }
  91
  92 static inline void tswap16s(uint16_t *s)
  93 {
  94 }
  95
  96 static inline void tswap32s(uint32_t *s)
  97 {
  98 }
  99
 100 static inline void tswap64s(uint64_t *s)
 101 {
 102 }
 103
 104 #endif
 105
 106 #if TARGET_LONG_SIZE == 4
 107 #define tswapl(s) tswap32(s)
 108 #define tswapls(s) tswap32s((uint32_t *)(s))
 109 #define bswaptls(s) bswap32s(s)
 110 #else
 111 #define tswapl(s) tswap64(s)
 112 #define tswapls(s) tswap64s((uint64_t *)(s))
 113 #define bswaptls(s) bswap64s(s)
 114 #endif
 115
 116 /* CPU memory access without any memory or io remapping */
 117
 118 /*
 119  * the generic syntax for the memory accesses is:
 120  *
 121  * load: ld{type}{sign}{size}{endian}_{access_type}(ptr)
 122  *
 123  * store: st{type}{size}{endian}_{access_type}(ptr, val)
 124  *
 125  * type is:
 126  * (empty): integer access
 127  *   f    : float access
 128  *
 129  * sign is:
 130  * (empty): for floats or 32 bit size
 131  *   u    : unsigned
 132  *   s    : signed
 133  *
 134  * size is:
 135  *   b: 8 bits
 136  *   w: 16 bits
 137  *   l: 32 bits
 138  *   q: 64 bits
 139  *
 140  * endian is:
 141  * (empty): target cpu endianness or 8 bit access
 142  *   r    : reversed target cpu endianness (not implemented yet)
 143  *   be   : big endian (not implemented yet)
 144  *   le   : little endian (not implemented yet)
 145  *
 146  * access_type is:
 147  *   raw    : host memory access
 148  *   user   : user mode access using soft MMU
 149  *   kernel : kernel mode access using soft MMU
 150  */
 151
 152 /* target-endianness CPU memory access functions */
 153 #if defined(TARGET_WORDS_BIGENDIAN)
 154 #define lduw_p(p) lduw_be_p(p)
 155 #define ldsw_p(p) ldsw_be_p(p)
 156 #define ldl_p(p) ldl_be_p(p)
 157 #define ldq_p(p) ldq_be_p(p)
 158 #define ldfl_p(p) ldfl_be_p(p)
 159 #define ldfq_p(p) ldfq_be_p(p)
 160 #define stw_p(p, v) stw_be_p(p, v)
 161 #define stl_p(p, v) stl_be_p(p, v)
 162 #define stq_p(p, v) stq_be_p(p, v)
 163 #define stfl_p(p, v) stfl_be_p(p, v)
 164 #define stfq_p(p, v) stfq_be_p(p, v)
 165 #else
 166 #define lduw_p(p) lduw_le_p(p)
 167 #define ldsw_p(p) ldsw_le_p(p)
 168 #define ldl_p(p) ldl_le_p(p)
 169 #define ldq_p(p) ldq_le_p(p)
 170 #define ldfl_p(p) ldfl_le_p(p)
 171 #define ldfq_p(p) ldfq_le_p(p)
 172 #define stw_p(p, v) stw_le_p(p, v)
 173 #define stl_p(p, v) stl_le_p(p, v)
 174 #define stq_p(p, v) stq_le_p(p, v)
 175 #define stfl_p(p, v) stfl_le_p(p, v)
 176 #define stfq_p(p, v) stfq_le_p(p, v)
 177 #endif
 178
 179 /* MMU memory access macros */
 180
 181 #if defined(CONFIG_USER_ONLY)
 182 #include <assert.h>
 183 #include "qemu-types.h"
 184
 185 /* On some host systems the guest address space is reserved on the host.
 186  * This allows the guest address space to be offset to a convenient location.
 187  */
 188 #if defined(CONFIG_USE_GUEST_BASE)
 189 extern unsigned long guest_base;
 190 extern int have_guest_base;
 191 extern unsigned long reserved_va;
 192 #define GUEST_BASE guest_base
 193 #define RESERVED_VA reserved_va
 194 #else
 195 #define GUEST_BASE 0ul
 196 #define RESERVED_VA 0ul
 197 #endif
 198
 199 /* All direct uses of g2h and h2g need to go away for usermode softmmu.  */
 200 #define g2h(x) ((void *)((unsigned long)(x) + GUEST_BASE))
 201
 202 #if HOST_LONG_BITS <= TARGET_VIRT_ADDR_SPACE_BITS
 203 #define h2g_valid(x) 1
 204 #else
 205 #define h2g_valid(x) ({ \
 206     unsigned long __guest = (unsigned long)(x) - GUEST_BASE; \
 207     __guest < (1ul << TARGET_VIRT_ADDR_SPACE_BITS); \
 208 })
 209 #endif
 210
 211 #define h2g(x) ({ \
 212     unsigned long __ret = (unsigned long)(x) - GUEST_BASE; \
 213     /* Check if given address fits target address space */ \
 214     assert(h2g_valid(x)); \
 215     (abi_ulong)__ret; \
 216 })
 217
 218 #define saddr(x) g2h(x)
 219 #define laddr(x) g2h(x)
 220
 221 #else /* !CONFIG_USER_ONLY */
 222 /* NOTE: we use double casts if pointers and target_ulong have
 223    different sizes */
 224 #define saddr(x) (uint8_t *)(long)(x)
 225 #define laddr(x) (uint8_t *)(long)(x)
 226 #endif
 227
 228 #define ldub_raw(p) ldub_p(laddr((p)))
 229 #define ldsb_raw(p) ldsb_p(laddr((p)))
 230 #define lduw_raw(p) lduw_p(laddr((p)))
 231 #define ldsw_raw(p) ldsw_p(laddr((p)))
 232 #define ldl_raw(p) ldl_p(laddr((p)))
 233 #define ldq_raw(p) ldq_p(laddr((p)))
 234 #define ldfl_raw(p) ldfl_p(laddr((p)))
 235 #define ldfq_raw(p) ldfq_p(laddr((p)))
 236 #define stb_raw(p, v) stb_p(saddr((p)), v)
 237 #define stw_raw(p, v) stw_p(saddr((p)), v)
 238 #define stl_raw(p, v) stl_p(saddr((p)), v)
 239 #define stq_raw(p, v) stq_p(saddr((p)), v)
 240 #define stfl_raw(p, v) stfl_p(saddr((p)), v)
 241 #define stfq_raw(p, v) stfq_p(saddr((p)), v)
 242
 243
 244 #if defined(CONFIG_USER_ONLY)
 245
 246 /* if user mode, no other memory access functions */
 247 #define ldub(p) ldub_raw(p)
 248 #define ldsb(p) ldsb_raw(p)
 249 #define lduw(p) lduw_raw(p)
 250 #define ldsw(p) ldsw_raw(p)
 251 #define ldl(p) ldl_raw(p)
 252 #define ldq(p) ldq_raw(p)
 253 #define ldfl(p) ldfl_raw(p)
 254 #define ldfq(p) ldfq_raw(p)
 255 #define stb(p, v) stb_raw(p, v)
 256 #define stw(p, v) stw_raw(p, v)
 257 #define stl(p, v) stl_raw(p, v)
 258 #define stq(p, v) stq_raw(p, v)
 259 #define stfl(p, v) stfl_raw(p, v)
 260 #define stfq(p, v) stfq_raw(p, v)
 261
 262 #define ldub_code(p) ldub_raw(p)
 263 #define ldsb_code(p) ldsb_raw(p)
 264 #define lduw_code(p) lduw_raw(p)
 265 #define ldsw_code(p) ldsw_raw(p)
 266 #define ldl_code(p) ldl_raw(p)
 267 #define ldq_code(p) ldq_raw(p)
 268
 269 #define ldub_kernel(p) ldub_raw(p)
 270 #define ldsb_kernel(p) ldsb_raw(p)
 271 #define lduw_kernel(p) lduw_raw(p)
 272 #define ldsw_kernel(p) ldsw_raw(p)
 273 #define ldl_kernel(p) ldl_raw(p)
 274 #define ldq_kernel(p) ldq_raw(p)
 275 #define ldfl_kernel(p) ldfl_raw(p)
 276 #define ldfq_kernel(p) ldfq_raw(p)
 277 #define stb_kernel(p, v) stb_raw(p, v)
 278 #define stw_kernel(p, v) stw_raw(p, v)
 279 #define stl_kernel(p, v) stl_raw(p, v)
 280 #define stq_kernel(p, v) stq_raw(p, v)
 281 #define stfl_kernel(p, v) stfl_raw(p, v)
 282 #define stfq_kernel(p, vt) stfq_raw(p, v)
 283
 284 #endif /* defined(CONFIG_USER_ONLY) */
 285
 286 /* page related stuff */
 287
 288 #define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)
 289 #define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)
 290 #define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)
 291
 292 /* ??? These should be the larger of unsigned long and target_ulong.  */
 293 extern unsigned long qemu_real_host_page_size;
 294 extern unsigned long qemu_host_page_size;
 295 extern unsigned long qemu_host_page_mask;
 296
 297 #define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask)
 298
 299 /* same as PROT_xxx */
 300 #define PAGE_READ      0x0001
 301 #define PAGE_WRITE     0x0002
 302 #define PAGE_EXEC      0x0004
 303 #define PAGE_BITS      (PAGE_READ | PAGE_WRITE | PAGE_EXEC)
 304 #define PAGE_VALID     0x0008
 305 /* original state of the write flag (used when tracking self-modifying
 306    code */
 307 #define PAGE_WRITE_ORG 0x0010
 308 #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
 309 /* FIXME: Code that sets/uses this is broken and needs to go away.  */
 310 #define PAGE_RESERVED  0x0020
 311 #endif
 312
 313 #if defined(CONFIG_USER_ONLY)
 314 void page_dump(FILE *f);
 315
 316 typedef int (*walk_memory_regions_fn)(void *, abi_ulong,
 317                                       abi_ulong, unsigned long);
 318 int walk_memory_regions(void *, walk_memory_regions_fn);
 319
 320 int page_get_flags(target_ulong address);
 321 void page_set_flags(target_ulong start, target_ulong end, int flags);
 322 int page_check_range(target_ulong start, target_ulong len, int flags);
 323 #endif
 324
 325 CPUState *cpu_copy(CPUState *env);
 326 CPUState *qemu_get_cpu(int cpu);
 327
 328 #define CPU_DUMP_CODE 0x00010000
 329
 330 void cpu_dump_state(CPUState *env, FILE *f, fprintf_function cpu_fprintf,
 331                     int flags);
 332 void cpu_dump_statistics(CPUState *env, FILE *f, fprintf_function cpu_fprintf,
 333                          int flags);
 334
 335 void QEMU_NORETURN cpu_abort(CPUState *env, const char *fmt, ...)
 336     GCC_FMT_ATTR(2, 3);
 337 extern CPUState *first_cpu;
 338 DECLARE_TLS(CPUState *,cpu_single_env);
 339 #define cpu_single_env tls_var(cpu_single_env)
 340
 341 /* Flags for use in ENV->INTERRUPT_PENDING.
 342
 343    The numbers assigned here are non-sequential in order to preserve
 344    binary compatibility with the vmstate dump.  Bit 0 (0x0001) was
 345    previously used for CPU_INTERRUPT_EXIT, and is cleared when loading
 346    the vmstate dump.  */
 347
 348 /* External hardware interrupt pending.  This is typically used for
 349    interrupts from devices.  */
 350 #define CPU_INTERRUPT_HARD        0x0002
 351
 352 /* Exit the current TB.  This is typically used when some system-level device
 353    makes some change to the memory mapping.  E.g. the a20 line change.  */
 354 #define CPU_INTERRUPT_EXITTB      0x0004
 355
 356 /* Halt the CPU.  */
 357 #define CPU_INTERRUPT_HALT        0x0020
 358
 359 /* Debug event pending.  */
 360 #define CPU_INTERRUPT_DEBUG       0x0080
 361
 362 /* Several target-specific external hardware interrupts.  Each target/cpu.h
 363    should define proper names based on these defines.  */
 364 #define CPU_INTERRUPT_TGT_EXT_0   0x0008
 365 #define CPU_INTERRUPT_TGT_EXT_1   0x0010
 366 #define CPU_INTERRUPT_TGT_EXT_2   0x0040
 367 #define CPU_INTERRUPT_TGT_EXT_3   0x0200
 368 #define CPU_INTERRUPT_TGT_EXT_4   0x1000
 369
 370 /* Several target-specific internal interrupts.  These differ from the
 371    preceding target-specific interrupts in that they are intended to
 372    originate from within the cpu itself, typically in response to some
 373    instruction being executed.  These, therefore, are not masked while
 374    single-stepping within the debugger.  */
 375 #define CPU_INTERRUPT_TGT_INT_0   0x0100
 376 #define CPU_INTERRUPT_TGT_INT_1   0x0400
 377 #define CPU_INTERRUPT_TGT_INT_2   0x0800
 378 #define CPU_INTERRUPT_TGT_INT_3   0x2000
 379
 380 /* First unused bit: 0x4000.  */
 381
 382 /* The set of all bits that should be masked when single-stepping.  */
 383 #define CPU_INTERRUPT_SSTEP_MASK \
 384     (CPU_INTERRUPT_HARD          \
 385      | CPU_INTERRUPT_TGT_EXT_0   \
 386      | CPU_INTERRUPT_TGT_EXT_1   \
 387      | CPU_INTERRUPT_TGT_EXT_2   \
 388      | CPU_INTERRUPT_TGT_EXT_3   \
 389      | CPU_INTERRUPT_TGT_EXT_4)
 390
 391 #ifndef CONFIG_USER_ONLY
 392 typedef void (*CPUInterruptHandler)(CPUState *, int);
 393
 394 extern CPUInterruptHandler cpu_interrupt_handler;
 395
 396 static inline void cpu_interrupt(CPUState *s, int mask)
 397 {
 398     cpu_interrupt_handler(s, mask);
 399 }
 400 #else /* USER_ONLY */
 401 void cpu_interrupt(CPUState *env, int mask);
 402 #endif /* USER_ONLY */
 403
 404 void cpu_reset_interrupt(CPUState *env, int mask);
 405
 406 void cpu_exit(CPUState *s);
 407
 408 bool qemu_cpu_has_work(CPUState *env);
 409
 410 /* Breakpoint/watchpoint flags */
 411 #define BP_MEM_READ           0x01
 412 #define BP_MEM_WRITE          0x02
 413 #define BP_MEM_ACCESS         (BP_MEM_READ | BP_MEM_WRITE)
 414 #define BP_STOP_BEFORE_ACCESS 0x04
 415 #define BP_WATCHPOINT_HIT     0x08
 416 #define BP_GDB                0x10
 417 #define BP_CPU                0x20
 418
 419 int cpu_breakpoint_insert(CPUState *env, target_ulong pc, int flags,
 420                           CPUBreakpoint **breakpoint);
 421 int cpu_breakpoint_remove(CPUState *env, target_ulong pc, int flags);
 422 void cpu_breakpoint_remove_by_ref(CPUState *env, CPUBreakpoint *breakpoint);
 423 void cpu_breakpoint_remove_all(CPUState *env, int mask);
 424 int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len,
 425                           int flags, CPUWatchpoint **watchpoint);
 426 int cpu_watchpoint_remove(CPUState *env, target_ulong addr,
 427                           target_ulong len, int flags);
 428 void cpu_watchpoint_remove_by_ref(CPUState *env, CPUWatchpoint *watchpoint);
 429 void cpu_watchpoint_remove_all(CPUState *env, int mask);
 430
 431 #define SSTEP_ENABLE  0x1  /* Enable simulated HW single stepping */
 432 #define SSTEP_NOIRQ   0x2  /* Do not use IRQ while single stepping */
 433 #define SSTEP_NOTIMER 0x4  /* Do not Timers while single stepping */
 434
 435 void cpu_single_step(CPUState *env, int enabled);
 436 void cpu_reset(CPUState *s);
 437 int cpu_is_stopped(CPUState *env);
 438 void run_on_cpu(CPUState *env, void (*func)(void *data), void *data);
 439
 440 #define CPU_LOG_TB_OUT_ASM (1 << 0)
 441 #define CPU_LOG_TB_IN_ASM  (1 << 1)
 442 #define CPU_LOG_TB_OP      (1 << 2)
 443 #define CPU_LOG_TB_OP_OPT  (1 << 3)
 444 #define CPU_LOG_INT        (1 << 4)
 445 #define CPU_LOG_EXEC       (1 << 5)
 446 #define CPU_LOG_PCALL      (1 << 6)
 447 #define CPU_LOG_IOPORT     (1 << 7)
 448 #define CPU_LOG_TB_CPU     (1 << 8)
 449 #define CPU_LOG_RESET      (1 << 9)
 450
 451 /* define log items */
 452 typedef struct CPULogItem {
 453     int mask;
 454     const char *name;
 455     const char *help;
 456 } CPULogItem;
 457
 458 extern const CPULogItem cpu_log_items[];
 459
 460 void cpu_set_log(int log_flags);
 461 void cpu_set_log_filename(const char *filename);
 462 int cpu_str_to_log_mask(const char *str);
 463
 464 #if !defined(CONFIG_USER_ONLY)
 465
 466 /* Return the physical page corresponding to a virtual one. Use it
 467    only for debugging because no protection checks are done. Return -1
 468    if no page found. */
 469 target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr);
 470
 471 /* memory API */
 472
 473 extern int phys_ram_fd;
 474 extern ram_addr_t ram_size;
 475
 476 /* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */
 477 #define RAM_PREALLOC_MASK   (1 << 0)
 478
 479 typedef struct RAMBlock {
 480     struct MemoryRegion *mr;
 481     uint8_t *host;
 482     ram_addr_t offset;
 483     ram_addr_t length;
 484     uint32_t flags;
 485     char idstr[256];
 486     QLIST_ENTRY(RAMBlock) next;
 487 #if defined(__linux__) && !defined(TARGET_S390X)
 488     int fd;
 489 #endif
 490 } RAMBlock;
 491
 492 typedef struct RAMList {
 493     uint8_t *phys_dirty;
 494     QLIST_HEAD(, RAMBlock) blocks;
 495 } RAMList;
 496 extern RAMList ram_list;
 497
 498 extern const char *mem_path;
 499 extern int mem_prealloc;
 500
 501 /* physical memory access */
 502
 503 /* MMIO pages are identified by a combination of an IO device index and
 504    3 flags.  The ROMD code stores the page ram offset in iotlb entry,
 505    so only a limited number of ids are avaiable.  */
 506
 507 #define IO_MEM_NB_ENTRIES  (1 << TARGET_PAGE_BITS)
 508
 509 /* Flags stored in the low bits of the TLB virtual address.  These are
 510    defined so that fast path ram access is all zeros.  */
 511 /* Zero if TLB entry is valid.  */
 512 #define TLB_INVALID_MASK   (1 << 3)
 513 /* Set if TLB entry references a clean RAM page.  The iotlb entry will
 514    contain the page physical address.  */
 515 #define TLB_NOTDIRTY    (1 << 4)
 516 /* Set if TLB entry is an IO callback.  */
 517 #define TLB_MMIO        (1 << 5)
 518
 519 void cpu_tlb_update_dirty(CPUState *env);
 520
 521 void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
 522 #endif /* !CONFIG_USER_ONLY */
 523
 524 int cpu_memory_rw_debug(CPUState *env, target_ulong addr,
 525                         uint8_t *buf, int len, int is_write);
 526
 527 #endif /* CPU_ALL_H */