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 "exec/cpu-common.h"
  24 #include "qemu/thread.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 "exec/user/abitypes.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)(target_ulong)(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     (!RESERVED_VA || (__guest < RESERVED_VA)); \
 209 })
 210 #endif
 211
 212 #define h2g(x) ({ \
 213     unsigned long __ret = (unsigned long)(x) - GUEST_BASE; \
 214     /* Check if given address fits target address space */ \
 215     assert(h2g_valid(x)); \
 216     (abi_ulong)__ret; \
 217 })
 218
 219 #define saddr(x) g2h(x)
 220 #define laddr(x) g2h(x)
 221
 222 #else /* !CONFIG_USER_ONLY */
 223 /* NOTE: we use double casts if pointers and target_ulong have
 224    different sizes */
 225 #define saddr(x) (uint8_t *)(intptr_t)(x)
 226 #define laddr(x) (uint8_t *)(intptr_t)(x)
 227 #endif
 228
 229 #define ldub_raw(p) ldub_p(laddr((p)))
 230 #define ldsb_raw(p) ldsb_p(laddr((p)))
 231 #define lduw_raw(p) lduw_p(laddr((p)))
 232 #define ldsw_raw(p) ldsw_p(laddr((p)))
 233 #define ldl_raw(p) ldl_p(laddr((p)))
 234 #define ldq_raw(p) ldq_p(laddr((p)))
 235 #define ldfl_raw(p) ldfl_p(laddr((p)))
 236 #define ldfq_raw(p) ldfq_p(laddr((p)))
 237 #define stb_raw(p, v) stb_p(saddr((p)), v)
 238 #define stw_raw(p, v) stw_p(saddr((p)), v)
 239 #define stl_raw(p, v) stl_p(saddr((p)), v)
 240 #define stq_raw(p, v) stq_p(saddr((p)), v)
 241 #define stfl_raw(p, v) stfl_p(saddr((p)), v)
 242 #define stfq_raw(p, v) stfq_p(saddr((p)), v)
 243
 244
 245 #if defined(CONFIG_USER_ONLY)
 246
 247 /* if user mode, no other memory access functions */
 248 #define ldub(p) ldub_raw(p)
 249 #define ldsb(p) ldsb_raw(p)
 250 #define lduw(p) lduw_raw(p)
 251 #define ldsw(p) ldsw_raw(p)
 252 #define ldl(p) ldl_raw(p)
 253 #define ldq(p) ldq_raw(p)
 254 #define ldfl(p) ldfl_raw(p)
 255 #define ldfq(p) ldfq_raw(p)
 256 #define stb(p, v) stb_raw(p, v)
 257 #define stw(p, v) stw_raw(p, v)
 258 #define stl(p, v) stl_raw(p, v)
 259 #define stq(p, v) stq_raw(p, v)
 260 #define stfl(p, v) stfl_raw(p, v)
 261 #define stfq(p, v) stfq_raw(p, v)
 262
 263 #define cpu_ldub_code(env1, p) ldub_raw(p)
 264 #define cpu_ldsb_code(env1, p) ldsb_raw(p)
 265 #define cpu_lduw_code(env1, p) lduw_raw(p)
 266 #define cpu_ldsw_code(env1, p) ldsw_raw(p)
 267 #define cpu_ldl_code(env1, p) ldl_raw(p)
 268 #define cpu_ldq_code(env1, p) ldq_raw(p)
 269
 270 #define cpu_ldub_data(env, addr) ldub_raw(addr)
 271 #define cpu_lduw_data(env, addr) lduw_raw(addr)
 272 #define cpu_ldsw_data(env, addr) ldsw_raw(addr)
 273 #define cpu_ldl_data(env, addr) ldl_raw(addr)
 274 #define cpu_ldq_data(env, addr) ldq_raw(addr)
 275
 276 #define cpu_stb_data(env, addr, data) stb_raw(addr, data)
 277 #define cpu_stw_data(env, addr, data) stw_raw(addr, data)
 278 #define cpu_stl_data(env, addr, data) stl_raw(addr, data)
 279 #define cpu_stq_data(env, addr, data) stq_raw(addr, data)
 280
 281 #define cpu_ldub_kernel(env, addr) ldub_raw(addr)
 282 #define cpu_lduw_kernel(env, addr) lduw_raw(addr)
 283 #define cpu_ldsw_kernel(env, addr) ldsw_raw(addr)
 284 #define cpu_ldl_kernel(env, addr) ldl_raw(addr)
 285 #define cpu_ldq_kernel(env, addr) ldq_raw(addr)
 286
 287 #define cpu_stb_kernel(env, addr, data) stb_raw(addr, data)
 288 #define cpu_stw_kernel(env, addr, data) stw_raw(addr, data)
 289 #define cpu_stl_kernel(env, addr, data) stl_raw(addr, data)
 290 #define cpu_stq_kernel(env, addr, data) stq_raw(addr, data)
 291
 292 #define ldub_kernel(p) ldub_raw(p)
 293 #define ldsb_kernel(p) ldsb_raw(p)
 294 #define lduw_kernel(p) lduw_raw(p)
 295 #define ldsw_kernel(p) ldsw_raw(p)
 296 #define ldl_kernel(p) ldl_raw(p)
 297 #define ldq_kernel(p) ldq_raw(p)
 298 #define ldfl_kernel(p) ldfl_raw(p)
 299 #define ldfq_kernel(p) ldfq_raw(p)
 300 #define stb_kernel(p, v) stb_raw(p, v)
 301 #define stw_kernel(p, v) stw_raw(p, v)
 302 #define stl_kernel(p, v) stl_raw(p, v)
 303 #define stq_kernel(p, v) stq_raw(p, v)
 304 #define stfl_kernel(p, v) stfl_raw(p, v)
 305 #define stfq_kernel(p, vt) stfq_raw(p, v)
 306
 307 #define cpu_ldub_data(env, addr) ldub_raw(addr)
 308 #define cpu_lduw_data(env, addr) lduw_raw(addr)
 309 #define cpu_ldl_data(env, addr) ldl_raw(addr)
 310
 311 #define cpu_stb_data(env, addr, data) stb_raw(addr, data)
 312 #define cpu_stw_data(env, addr, data) stw_raw(addr, data)
 313 #define cpu_stl_data(env, addr, data) stl_raw(addr, data)
 314 #endif /* defined(CONFIG_USER_ONLY) */
 315
 316 /* page related stuff */
 317
 318 #define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)
 319 #define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)
 320 #define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)
 321
 322 /* ??? These should be the larger of uintptr_t and target_ulong.  */
 323 extern uintptr_t qemu_real_host_page_size;
 324 extern uintptr_t qemu_host_page_size;
 325 extern uintptr_t qemu_host_page_mask;
 326
 327 #define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask)
 328
 329 /* same as PROT_xxx */
 330 #define PAGE_READ      0x0001
 331 #define PAGE_WRITE     0x0002
 332 #define PAGE_EXEC      0x0004
 333 #define PAGE_BITS      (PAGE_READ | PAGE_WRITE | PAGE_EXEC)
 334 #define PAGE_VALID     0x0008
 335 /* original state of the write flag (used when tracking self-modifying
 336    code */
 337 #define PAGE_WRITE_ORG 0x0010
 338 #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
 339 /* FIXME: Code that sets/uses this is broken and needs to go away.  */
 340 #define PAGE_RESERVED  0x0020
 341 #endif
 342
 343 #if defined(CONFIG_USER_ONLY)
 344 void page_dump(FILE *f);
 345
 346 typedef int (*walk_memory_regions_fn)(void *, abi_ulong,
 347                                       abi_ulong, unsigned long);
 348 int walk_memory_regions(void *, walk_memory_regions_fn);
 349
 350 int page_get_flags(target_ulong address);
 351 void page_set_flags(target_ulong start, target_ulong end, int flags);
 352 int page_check_range(target_ulong start, target_ulong len, int flags);
 353 #endif
 354
 355 CPUArchState *cpu_copy(CPUArchState *env);
 356
 357 void QEMU_NORETURN cpu_abort(CPUArchState *env, const char *fmt, ...)
 358     GCC_FMT_ATTR(2, 3);
 359
 360 /* Flags for use in ENV->INTERRUPT_PENDING.
 361
 362    The numbers assigned here are non-sequential in order to preserve
 363    binary compatibility with the vmstate dump.  Bit 0 (0x0001) was
 364    previously used for CPU_INTERRUPT_EXIT, and is cleared when loading
 365    the vmstate dump.  */
 366
 367 /* External hardware interrupt pending.  This is typically used for
 368    interrupts from devices.  */
 369 #define CPU_INTERRUPT_HARD        0x0002
 370
 371 /* Exit the current TB.  This is typically used when some system-level device
 372    makes some change to the memory mapping.  E.g. the a20 line change.  */
 373 #define CPU_INTERRUPT_EXITTB      0x0004
 374
 375 /* Halt the CPU.  */
 376 #define CPU_INTERRUPT_HALT        0x0020
 377
 378 /* Debug event pending.  */
 379 #define CPU_INTERRUPT_DEBUG       0x0080
 380
 381 /* Several target-specific external hardware interrupts.  Each target/cpu.h
 382    should define proper names based on these defines.  */
 383 #define CPU_INTERRUPT_TGT_EXT_0   0x0008
 384 #define CPU_INTERRUPT_TGT_EXT_1   0x0010
 385 #define CPU_INTERRUPT_TGT_EXT_2   0x0040
 386 #define CPU_INTERRUPT_TGT_EXT_3   0x0200
 387 #define CPU_INTERRUPT_TGT_EXT_4   0x1000
 388
 389 /* Several target-specific internal interrupts.  These differ from the
 390    preceding target-specific interrupts in that they are intended to
 391    originate from within the cpu itself, typically in response to some
 392    instruction being executed.  These, therefore, are not masked while
 393    single-stepping within the debugger.  */
 394 #define CPU_INTERRUPT_TGT_INT_0   0x0100
 395 #define CPU_INTERRUPT_TGT_INT_1   0x0400
 396 #define CPU_INTERRUPT_TGT_INT_2   0x0800
 397 #define CPU_INTERRUPT_TGT_INT_3   0x2000
 398
 399 /* First unused bit: 0x4000.  */
 400
 401 /* The set of all bits that should be masked when single-stepping.  */
 402 #define CPU_INTERRUPT_SSTEP_MASK \
 403     (CPU_INTERRUPT_HARD          \
 404      | CPU_INTERRUPT_TGT_EXT_0   \
 405      | CPU_INTERRUPT_TGT_EXT_1   \
 406      | CPU_INTERRUPT_TGT_EXT_2   \
 407      | CPU_INTERRUPT_TGT_EXT_3   \
 408      | CPU_INTERRUPT_TGT_EXT_4)
 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(CPUArchState *env, target_ulong pc, int flags,
 420                           CPUBreakpoint **breakpoint);
 421 int cpu_breakpoint_remove(CPUArchState *env, target_ulong pc, int flags);
 422 void cpu_breakpoint_remove_by_ref(CPUArchState *env, CPUBreakpoint *breakpoint);
 423 void cpu_breakpoint_remove_all(CPUArchState *env, int mask);
 424 int cpu_watchpoint_insert(CPUArchState *env, target_ulong addr, target_ulong len,
 425                           int flags, CPUWatchpoint **watchpoint);
 426 int cpu_watchpoint_remove(CPUArchState *env, target_ulong addr,
 427                           target_ulong len, int flags);
 428 void cpu_watchpoint_remove_by_ref(CPUArchState *env, CPUWatchpoint *watchpoint);
 429 void cpu_watchpoint_remove_all(CPUArchState *env, int mask);
 430
 431 #if !defined(CONFIG_USER_ONLY)
 432
 433 /* memory API */
 434
 435 extern ram_addr_t ram_size;
 436
 437 /* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */
 438 #define RAM_PREALLOC_MASK   (1 << 0)
 439
 440 typedef struct RAMBlock {
 441     struct MemoryRegion *mr;
 442     uint8_t *host;
 443     ram_addr_t offset;
 444     ram_addr_t length;
 445     uint32_t flags;
 446     char idstr[256];
 447     /* Reads can take either the iothread or the ramlist lock.
 448      * Writes must take both locks.
 449      */
 450     QTAILQ_ENTRY(RAMBlock) next;
 451 #if defined(__linux__) && !defined(TARGET_S390X)
 452     int fd;
 453 #endif
 454 } RAMBlock;
 455
 456 typedef struct RAMList {
 457     QemuMutex mutex;
 458     /* Protected by the iothread lock.  */
 459     uint8_t *phys_dirty;
 460     RAMBlock *mru_block;
 461     /* Protected by the ramlist lock.  */
 462     QTAILQ_HEAD(, RAMBlock) blocks;
 463     uint32_t version;
 464 } RAMList;
 465 extern RAMList ram_list;
 466
 467 extern const char *mem_path;
 468 extern int mem_prealloc;
 469
 470 /* Flags stored in the low bits of the TLB virtual address.  These are
 471    defined so that fast path ram access is all zeros.  */
 472 /* Zero if TLB entry is valid.  */
 473 #define TLB_INVALID_MASK   (1 << 3)
 474 /* Set if TLB entry references a clean RAM page.  The iotlb entry will
 475    contain the page physical address.  */
 476 #define TLB_NOTDIRTY    (1 << 4)
 477 /* Set if TLB entry is an IO callback.  */
 478 #define TLB_MMIO        (1 << 5)
 479
 480 void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
 481 ram_addr_t last_ram_offset(void);
 482 void qemu_mutex_lock_ramlist(void);
 483 void qemu_mutex_unlock_ramlist(void);
 484 #endif /* !CONFIG_USER_ONLY */
 485
 486 int cpu_memory_rw_debug(CPUArchState *env, target_ulong addr,
 487                         uint8_t *buf, int len, int is_write);
 488
 489 #endif /* CPU_ALL_H */