include/exec/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 "exec/cpu-common.h"
  25 #include "qemu/thread.h"
  26
  27 /* some important defines:
  28  *
  29  * WORDS_ALIGNED : if defined, the host cpu can only make word aligned
  30  * memory accesses.
  31  *
  32  * HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
  33  * otherwise little endian.
  34  *
  35  * (TARGET_WORDS_ALIGNED : same for target cpu (not supported yet))
  36  *
  37  * TARGET_WORDS_BIGENDIAN : same for target cpu
  38  */
  39
  40 #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
  41 #define BSWAP_NEEDED
  42 #endif
  43
  44 #ifdef BSWAP_NEEDED
  45
  46 static inline uint16_t tswap16(uint16_t s)
  47 {
  48     return bswap16(s);
  49 }
  50
  51 static inline uint32_t tswap32(uint32_t s)
  52 {
  53     return bswap32(s);
  54 }
  55
  56 static inline uint64_t tswap64(uint64_t s)
  57 {
  58     return bswap64(s);
  59 }
  60
  61 static inline void tswap16s(uint16_t *s)
  62 {
  63     *s = bswap16(*s);
  64 }
  65
  66 static inline void tswap32s(uint32_t *s)
  67 {
  68     *s = bswap32(*s);
  69 }
  70
  71 static inline void tswap64s(uint64_t *s)
  72 {
  73     *s = bswap64(*s);
  74 }
  75
  76 #else
  77
  78 static inline uint16_t tswap16(uint16_t s)
  79 {
  80     return s;
  81 }
  82
  83 static inline uint32_t tswap32(uint32_t s)
  84 {
  85     return s;
  86 }
  87
  88 static inline uint64_t tswap64(uint64_t s)
  89 {
  90     return s;
  91 }
  92
  93 static inline void tswap16s(uint16_t *s)
  94 {
  95 }
  96
  97 static inline void tswap32s(uint32_t *s)
  98 {
  99 }
 100
 101 static inline void tswap64s(uint64_t *s)
 102 {
 103 }
 104
 105 #endif
 106
 107 #if TARGET_LONG_SIZE == 4
 108 #define tswapl(s) tswap32(s)
 109 #define tswapls(s) tswap32s((uint32_t *)(s))
 110 #define bswaptls(s) bswap32s(s)
 111 #else
 112 #define tswapl(s) tswap64(s)
 113 #define tswapls(s) tswap64s((uint64_t *)(s))
 114 #define bswaptls(s) bswap64s(s)
 115 #endif
 116
 117 /* CPU memory access without any memory or io remapping */
 118
 119 /*
 120  * the generic syntax for the memory accesses is:
 121  *
 122  * load: ld{type}{sign}{size}{endian}_{access_type}(ptr)
 123  *
 124  * store: st{type}{size}{endian}_{access_type}(ptr, val)
 125  *
 126  * type is:
 127  * (empty): integer access
 128  *   f    : float access
 129  *
 130  * sign is:
 131  * (empty): for floats or 32 bit size
 132  *   u    : unsigned
 133  *   s    : signed
 134  *
 135  * size is:
 136  *   b: 8 bits
 137  *   w: 16 bits
 138  *   l: 32 bits
 139  *   q: 64 bits
 140  *
 141  * endian is:
 142  * (empty): target cpu endianness or 8 bit access
 143  *   r    : reversed target cpu endianness (not implemented yet)
 144  *   be   : big endian (not implemented yet)
 145  *   le   : little endian (not implemented yet)
 146  *
 147  * access_type is:
 148  *   raw    : host memory access
 149  *   user   : user mode access using soft MMU
 150  *   kernel : kernel mode access using soft MMU
 151  */
 152
 153 /* target-endianness CPU memory access functions */
 154 #if defined(TARGET_WORDS_BIGENDIAN)
 155 #define lduw_p(p) lduw_be_p(p)
 156 #define ldsw_p(p) ldsw_be_p(p)
 157 #define ldl_p(p) ldl_be_p(p)
 158 #define ldq_p(p) ldq_be_p(p)
 159 #define ldfl_p(p) ldfl_be_p(p)
 160 #define ldfq_p(p) ldfq_be_p(p)
 161 #define stw_p(p, v) stw_be_p(p, v)
 162 #define stl_p(p, v) stl_be_p(p, v)
 163 #define stq_p(p, v) stq_be_p(p, v)
 164 #define stfl_p(p, v) stfl_be_p(p, v)
 165 #define stfq_p(p, v) stfq_be_p(p, v)
 166 #else
 167 #define lduw_p(p) lduw_le_p(p)
 168 #define ldsw_p(p) ldsw_le_p(p)
 169 #define ldl_p(p) ldl_le_p(p)
 170 #define ldq_p(p) ldq_le_p(p)
 171 #define ldfl_p(p) ldfl_le_p(p)
 172 #define ldfq_p(p) ldfq_le_p(p)
 173 #define stw_p(p, v) stw_le_p(p, v)
 174 #define stl_p(p, v) stl_le_p(p, v)
 175 #define stq_p(p, v) stq_le_p(p, v)
 176 #define stfl_p(p, v) stfl_le_p(p, v)
 177 #define stfq_p(p, v) stfq_le_p(p, v)
 178 #endif
 179
 180 /* MMU memory access macros */
 181
 182 #if defined(CONFIG_USER_ONLY)
 183 #include <assert.h>
 184 #include "exec/user/abitypes.h"
 185
 186 /* On some host systems the guest address space is reserved on the host.
 187  * This allows the guest address space to be offset to a convenient location.
 188  */
 189 #if defined(CONFIG_USE_GUEST_BASE)
 190 extern unsigned long guest_base;
 191 extern int have_guest_base;
 192 extern unsigned long reserved_va;
 193 #define GUEST_BASE guest_base
 194 #define RESERVED_VA reserved_va
 195 #else
 196 #define GUEST_BASE 0ul
 197 #define RESERVED_VA 0ul
 198 #endif
 199
 200 /* All direct uses of g2h and h2g need to go away for usermode softmmu.  */
 201 #define g2h(x) ((void *)((unsigned long)(target_ulong)(x) + GUEST_BASE))
 202
 203 #if HOST_LONG_BITS <= TARGET_VIRT_ADDR_SPACE_BITS
 204 #define h2g_valid(x) 1
 205 #else
 206 #define h2g_valid(x) ({ \
 207     unsigned long __guest = (unsigned long)(x) - GUEST_BASE; \
 208     (__guest < (1ul << TARGET_VIRT_ADDR_SPACE_BITS)) && \
 209     (!RESERVED_VA || (__guest < RESERVED_VA)); \
 210 })
 211 #endif
 212
 213 #define h2g(x) ({ \
 214     unsigned long __ret = (unsigned long)(x) - GUEST_BASE; \
 215     /* Check if given address fits target address space */ \
 216     assert(h2g_valid(x)); \
 217     (abi_ulong)__ret; \
 218 })
 219
 220 #define saddr(x) g2h(x)
 221 #define laddr(x) g2h(x)
 222
 223 #else /* !CONFIG_USER_ONLY */
 224 /* NOTE: we use double casts if pointers and target_ulong have
 225    different sizes */
 226 #define saddr(x) (uint8_t *)(intptr_t)(x)
 227 #define laddr(x) (uint8_t *)(intptr_t)(x)
 228 #endif
 229
 230 #define ldub_raw(p) ldub_p(laddr((p)))
 231 #define ldsb_raw(p) ldsb_p(laddr((p)))
 232 #define lduw_raw(p) lduw_p(laddr((p)))
 233 #define ldsw_raw(p) ldsw_p(laddr((p)))
 234 #define ldl_raw(p) ldl_p(laddr((p)))
 235 #define ldq_raw(p) ldq_p(laddr((p)))
 236 #define ldfl_raw(p) ldfl_p(laddr((p)))
 237 #define ldfq_raw(p) ldfq_p(laddr((p)))
 238 #define stb_raw(p, v) stb_p(saddr((p)), v)
 239 #define stw_raw(p, v) stw_p(saddr((p)), v)
 240 #define stl_raw(p, v) stl_p(saddr((p)), v)
 241 #define stq_raw(p, v) stq_p(saddr((p)), v)
 242 #define stfl_raw(p, v) stfl_p(saddr((p)), v)
 243 #define stfq_raw(p, v) stfq_p(saddr((p)), v)
 244
 245
 246 #if defined(CONFIG_USER_ONLY)
 247
 248 /* if user mode, no other memory access functions */
 249 #define ldub(p) ldub_raw(p)
 250 #define ldsb(p) ldsb_raw(p)
 251 #define lduw(p) lduw_raw(p)
 252 #define ldsw(p) ldsw_raw(p)
 253 #define ldl(p) ldl_raw(p)
 254 #define ldq(p) ldq_raw(p)
 255 #define ldfl(p) ldfl_raw(p)
 256 #define ldfq(p) ldfq_raw(p)
 257 #define stb(p, v) stb_raw(p, v)
 258 #define stw(p, v) stw_raw(p, v)
 259 #define stl(p, v) stl_raw(p, v)
 260 #define stq(p, v) stq_raw(p, v)
 261 #define stfl(p, v) stfl_raw(p, v)
 262 #define stfq(p, v) stfq_raw(p, v)
 263
 264 #define cpu_ldub_code(env1, p) ldub_raw(p)
 265 #define cpu_ldsb_code(env1, p) ldsb_raw(p)
 266 #define cpu_lduw_code(env1, p) lduw_raw(p)
 267 #define cpu_ldsw_code(env1, p) ldsw_raw(p)
 268 #define cpu_ldl_code(env1, p) ldl_raw(p)
 269 #define cpu_ldq_code(env1, p) ldq_raw(p)
 270
 271 #define cpu_ldub_data(env, addr) ldub_raw(addr)
 272 #define cpu_lduw_data(env, addr) lduw_raw(addr)
 273 #define cpu_ldsw_data(env, addr) ldsw_raw(addr)
 274 #define cpu_ldl_data(env, addr) ldl_raw(addr)
 275 #define cpu_ldq_data(env, addr) ldq_raw(addr)
 276
 277 #define cpu_stb_data(env, addr, data) stb_raw(addr, data)
 278 #define cpu_stw_data(env, addr, data) stw_raw(addr, data)
 279 #define cpu_stl_data(env, addr, data) stl_raw(addr, data)
 280 #define cpu_stq_data(env, addr, data) stq_raw(addr, data)
 281
 282 #define cpu_ldub_kernel(env, addr) ldub_raw(addr)
 283 #define cpu_lduw_kernel(env, addr) lduw_raw(addr)
 284 #define cpu_ldsw_kernel(env, addr) ldsw_raw(addr)
 285 #define cpu_ldl_kernel(env, addr) ldl_raw(addr)
 286 #define cpu_ldq_kernel(env, addr) ldq_raw(addr)
 287
 288 #define cpu_stb_kernel(env, addr, data) stb_raw(addr, data)
 289 #define cpu_stw_kernel(env, addr, data) stw_raw(addr, data)
 290 #define cpu_stl_kernel(env, addr, data) stl_raw(addr, data)
 291 #define cpu_stq_kernel(env, addr, data) stq_raw(addr, data)
 292
 293 #define ldub_kernel(p) ldub_raw(p)
 294 #define ldsb_kernel(p) ldsb_raw(p)
 295 #define lduw_kernel(p) lduw_raw(p)
 296 #define ldsw_kernel(p) ldsw_raw(p)
 297 #define ldl_kernel(p) ldl_raw(p)
 298 #define ldq_kernel(p) ldq_raw(p)
 299 #define ldfl_kernel(p) ldfl_raw(p)
 300 #define ldfq_kernel(p) ldfq_raw(p)
 301 #define stb_kernel(p, v) stb_raw(p, v)
 302 #define stw_kernel(p, v) stw_raw(p, v)
 303 #define stl_kernel(p, v) stl_raw(p, v)
 304 #define stq_kernel(p, v) stq_raw(p, v)
 305 #define stfl_kernel(p, v) stfl_raw(p, v)
 306 #define stfq_kernel(p, vt) stfq_raw(p, v)
 307
 308 #define cpu_ldub_data(env, addr) ldub_raw(addr)
 309 #define cpu_lduw_data(env, addr) lduw_raw(addr)
 310 #define cpu_ldl_data(env, addr) ldl_raw(addr)
 311
 312 #define cpu_stb_data(env, addr, data) stb_raw(addr, data)
 313 #define cpu_stw_data(env, addr, data) stw_raw(addr, data)
 314 #define cpu_stl_data(env, addr, data) stl_raw(addr, data)
 315 #endif /* defined(CONFIG_USER_ONLY) */
 316
 317 /* page related stuff */
 318
 319 #define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)
 320 #define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)
 321 #define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)
 322
 323 /* ??? These should be the larger of uintptr_t and target_ulong.  */
 324 extern uintptr_t qemu_real_host_page_size;
 325 extern uintptr_t qemu_host_page_size;
 326 extern uintptr_t qemu_host_page_mask;
 327
 328 #define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask)
 329
 330 /* same as PROT_xxx */
 331 #define PAGE_READ      0x0001
 332 #define PAGE_WRITE     0x0002
 333 #define PAGE_EXEC      0x0004
 334 #define PAGE_BITS      (PAGE_READ | PAGE_WRITE | PAGE_EXEC)
 335 #define PAGE_VALID     0x0008
 336 /* original state of the write flag (used when tracking self-modifying
 337    code */
 338 #define PAGE_WRITE_ORG 0x0010
 339 #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
 340 /* FIXME: Code that sets/uses this is broken and needs to go away.  */
 341 #define PAGE_RESERVED  0x0020
 342 #endif
 343
 344 #if defined(CONFIG_USER_ONLY)
 345 void page_dump(FILE *f);
 346
 347 typedef int (*walk_memory_regions_fn)(void *, abi_ulong,
 348                                       abi_ulong, unsigned long);
 349 int walk_memory_regions(void *, walk_memory_regions_fn);
 350
 351 int page_get_flags(target_ulong address);
 352 void page_set_flags(target_ulong start, target_ulong end, int flags);
 353 int page_check_range(target_ulong start, target_ulong len, int flags);
 354 #endif
 355
 356 CPUArchState *cpu_copy(CPUArchState *env);
 357
 358 void QEMU_NORETURN cpu_abort(CPUArchState *env, const char *fmt, ...)
 359     GCC_FMT_ATTR(2, 3);
 360 extern CPUArchState *first_cpu;
 361 DECLARE_TLS(CPUArchState *,cpu_single_env);
 362 #define cpu_single_env tls_var(cpu_single_env)
 363
 364 /* Flags for use in ENV->INTERRUPT_PENDING.
 365
 366    The numbers assigned here are non-sequential in order to preserve
 367    binary compatibility with the vmstate dump.  Bit 0 (0x0001) was
 368    previously used for CPU_INTERRUPT_EXIT, and is cleared when loading
 369    the vmstate dump.  */
 370
 371 /* External hardware interrupt pending.  This is typically used for
 372    interrupts from devices.  */
 373 #define CPU_INTERRUPT_HARD        0x0002
 374
 375 /* Exit the current TB.  This is typically used when some system-level device
 376    makes some change to the memory mapping.  E.g. the a20 line change.  */
 377 #define CPU_INTERRUPT_EXITTB      0x0004
 378
 379 /* Halt the CPU.  */
 380 #define CPU_INTERRUPT_HALT        0x0020
 381
 382 /* Debug event pending.  */
 383 #define CPU_INTERRUPT_DEBUG       0x0080
 384
 385 /* Several target-specific external hardware interrupts.  Each target/cpu.h
 386    should define proper names based on these defines.  */
 387 #define CPU_INTERRUPT_TGT_EXT_0   0x0008
 388 #define CPU_INTERRUPT_TGT_EXT_1   0x0010
 389 #define CPU_INTERRUPT_TGT_EXT_2   0x0040
 390 #define CPU_INTERRUPT_TGT_EXT_3   0x0200
 391 #define CPU_INTERRUPT_TGT_EXT_4   0x1000
 392
 393 /* Several target-specific internal interrupts.  These differ from the
 394    preceding target-specific interrupts in that they are intended to
 395    originate from within the cpu itself, typically in response to some
 396    instruction being executed.  These, therefore, are not masked while
 397    single-stepping within the debugger.  */
 398 #define CPU_INTERRUPT_TGT_INT_0   0x0100
 399 #define CPU_INTERRUPT_TGT_INT_1   0x0400
 400 #define CPU_INTERRUPT_TGT_INT_2   0x0800
 401 #define CPU_INTERRUPT_TGT_INT_3   0x2000
 402
 403 /* First unused bit: 0x4000.  */
 404
 405 /* The set of all bits that should be masked when single-stepping.  */
 406 #define CPU_INTERRUPT_SSTEP_MASK \
 407     (CPU_INTERRUPT_HARD          \
 408      | CPU_INTERRUPT_TGT_EXT_0   \
 409      | CPU_INTERRUPT_TGT_EXT_1   \
 410      | CPU_INTERRUPT_TGT_EXT_2   \
 411      | CPU_INTERRUPT_TGT_EXT_3   \
 412      | CPU_INTERRUPT_TGT_EXT_4)
 413
 414 /* Breakpoint/watchpoint flags */
 415 #define BP_MEM_READ           0x01
 416 #define BP_MEM_WRITE          0x02
 417 #define BP_MEM_ACCESS         (BP_MEM_READ | BP_MEM_WRITE)
 418 #define BP_STOP_BEFORE_ACCESS 0x04
 419 #define BP_WATCHPOINT_HIT     0x08
 420 #define BP_GDB                0x10
 421 #define BP_CPU                0x20
 422
 423 int cpu_breakpoint_insert(CPUArchState *env, target_ulong pc, int flags,
 424                           CPUBreakpoint **breakpoint);
 425 int cpu_breakpoint_remove(CPUArchState *env, target_ulong pc, int flags);
 426 void cpu_breakpoint_remove_by_ref(CPUArchState *env, CPUBreakpoint *breakpoint);
 427 void cpu_breakpoint_remove_all(CPUArchState *env, int mask);
 428 int cpu_watchpoint_insert(CPUArchState *env, target_ulong addr, target_ulong len,
 429                           int flags, CPUWatchpoint **watchpoint);
 430 int cpu_watchpoint_remove(CPUArchState *env, target_ulong addr,
 431                           target_ulong len, int flags);
 432 void cpu_watchpoint_remove_by_ref(CPUArchState *env, CPUWatchpoint *watchpoint);
 433 void cpu_watchpoint_remove_all(CPUArchState *env, int mask);
 434
 435 #define SSTEP_ENABLE  0x1  /* Enable simulated HW single stepping */
 436 #define SSTEP_NOIRQ   0x2  /* Do not use IRQ while single stepping */
 437 #define SSTEP_NOTIMER 0x4  /* Do not Timers while single stepping */
 438
 439 void cpu_single_step(CPUArchState *env, int enabled);
 440
 441 #if !defined(CONFIG_USER_ONLY)
 442
 443 /* Return the physical page corresponding to a virtual one. Use it
 444    only for debugging because no protection checks are done. Return -1
 445    if no page found. */
 446 hwaddr cpu_get_phys_page_debug(CPUArchState *env, target_ulong addr);
 447
 448 /* memory API */
 449
 450 extern ram_addr_t ram_size;
 451
 452 /* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */
 453 #define RAM_PREALLOC_MASK   (1 << 0)
 454
 455 typedef struct RAMBlock {
 456     struct MemoryRegion *mr;
 457     uint8_t *host;
 458     ram_addr_t offset;
 459     ram_addr_t length;
 460     uint32_t flags;
 461     char idstr[256];
 462     /* Reads can take either the iothread or the ramlist lock.
 463      * Writes must take both locks.
 464      */
 465     QTAILQ_ENTRY(RAMBlock) next;
 466 #if defined(__linux__) && !defined(TARGET_S390X)
 467     int fd;
 468 #endif
 469 } RAMBlock;
 470
 471 typedef struct RAMList {
 472     QemuMutex mutex;
 473     /* Protected by the iothread lock.  */
 474     uint8_t *phys_dirty;
 475     RAMBlock *mru_block;
 476     /* Protected by the ramlist lock.  */
 477     QTAILQ_HEAD(, RAMBlock) blocks;
 478     uint32_t version;
 479 } RAMList;
 480 extern RAMList ram_list;
 481
 482 extern const char *mem_path;
 483 extern int mem_prealloc;
 484
 485 /* Flags stored in the low bits of the TLB virtual address.  These are
 486    defined so that fast path ram access is all zeros.  */
 487 /* Zero if TLB entry is valid.  */
 488 #define TLB_INVALID_MASK   (1 << 3)
 489 /* Set if TLB entry references a clean RAM page.  The iotlb entry will
 490    contain the page physical address.  */
 491 #define TLB_NOTDIRTY    (1 << 4)
 492 /* Set if TLB entry is an IO callback.  */
 493 #define TLB_MMIO        (1 << 5)
 494
 495 void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
 496 ram_addr_t last_ram_offset(void);
 497 void qemu_mutex_lock_ramlist(void);
 498 void qemu_mutex_unlock_ramlist(void);
 499 #endif /* !CONFIG_USER_ONLY */
 500
 501 int cpu_memory_rw_debug(CPUArchState *env, target_ulong addr,
 502                         uint8_t *buf, int len, int is_write);
 503
 504 #endif /* CPU_ALL_H */