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 "exec/memory.h"
  25 #include "qemu/thread.h"
  26 #include "qom/cpu.h"
  27
  28 /* some important defines:
  29  *
  30  * WORDS_ALIGNED : if defined, the host cpu can only make word aligned
  31  * memory accesses.
  32  *
  33  * HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
  34  * otherwise little endian.
  35  *
  36  * (TARGET_WORDS_ALIGNED : same for target cpu (not supported yet))
  37  *
  38  * TARGET_WORDS_BIGENDIAN : same for target cpu
  39  */
  40
  41 #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
  42 #define BSWAP_NEEDED
  43 #endif
  44
  45 #ifdef BSWAP_NEEDED
  46
  47 static inline uint16_t tswap16(uint16_t s)
  48 {
  49     return bswap16(s);
  50 }
  51
  52 static inline uint32_t tswap32(uint32_t s)
  53 {
  54     return bswap32(s);
  55 }
  56
  57 static inline uint64_t tswap64(uint64_t s)
  58 {
  59     return bswap64(s);
  60 }
  61
  62 static inline void tswap16s(uint16_t *s)
  63 {
  64     *s = bswap16(*s);
  65 }
  66
  67 static inline void tswap32s(uint32_t *s)
  68 {
  69     *s = bswap32(*s);
  70 }
  71
  72 static inline void tswap64s(uint64_t *s)
  73 {
  74     *s = bswap64(*s);
  75 }
  76
  77 #else
  78
  79 static inline uint16_t tswap16(uint16_t s)
  80 {
  81     return s;
  82 }
  83
  84 static inline uint32_t tswap32(uint32_t s)
  85 {
  86     return s;
  87 }
  88
  89 static inline uint64_t tswap64(uint64_t s)
  90 {
  91     return s;
  92 }
  93
  94 static inline void tswap16s(uint16_t *s)
  95 {
  96 }
  97
  98 static inline void tswap32s(uint32_t *s)
  99 {
 100 }
 101
 102 static inline void tswap64s(uint64_t *s)
 103 {
 104 }
 105
 106 #endif
 107
 108 #if TARGET_LONG_SIZE == 4
 109 #define tswapl(s) tswap32(s)
 110 #define tswapls(s) tswap32s((uint32_t *)(s))
 111 #define bswaptls(s) bswap32s(s)
 112 #else
 113 #define tswapl(s) tswap64(s)
 114 #define tswapls(s) tswap64s((uint64_t *)(s))
 115 #define bswaptls(s) bswap64s(s)
 116 #endif
 117
 118 /* CPU memory access without any memory or io remapping */
 119
 120 /*
 121  * the generic syntax for the memory accesses is:
 122  *
 123  * load: ld{type}{sign}{size}{endian}_{access_type}(ptr)
 124  *
 125  * store: st{type}{size}{endian}_{access_type}(ptr, val)
 126  *
 127  * type is:
 128  * (empty): integer access
 129  *   f    : float access
 130  *
 131  * sign is:
 132  * (empty): for floats or 32 bit size
 133  *   u    : unsigned
 134  *   s    : signed
 135  *
 136  * size is:
 137  *   b: 8 bits
 138  *   w: 16 bits
 139  *   l: 32 bits
 140  *   q: 64 bits
 141  *
 142  * endian is:
 143  * (empty): target cpu endianness or 8 bit access
 144  *   r    : reversed target cpu endianness (not implemented yet)
 145  *   be   : big endian (not implemented yet)
 146  *   le   : little endian (not implemented yet)
 147  *
 148  * access_type is:
 149  *   raw    : host memory access
 150  *   user   : user mode access using soft MMU
 151  *   kernel : kernel mode access using soft MMU
 152  */
 153
 154 /* target-endianness CPU memory access functions */
 155 #if defined(TARGET_WORDS_BIGENDIAN)
 156 #define lduw_p(p) lduw_be_p(p)
 157 #define ldsw_p(p) ldsw_be_p(p)
 158 #define ldl_p(p) ldl_be_p(p)
 159 #define ldq_p(p) ldq_be_p(p)
 160 #define ldfl_p(p) ldfl_be_p(p)
 161 #define ldfq_p(p) ldfq_be_p(p)
 162 #define stw_p(p, v) stw_be_p(p, v)
 163 #define stl_p(p, v) stl_be_p(p, v)
 164 #define stq_p(p, v) stq_be_p(p, v)
 165 #define stfl_p(p, v) stfl_be_p(p, v)
 166 #define stfq_p(p, v) stfq_be_p(p, v)
 167 #else
 168 #define lduw_p(p) lduw_le_p(p)
 169 #define ldsw_p(p) ldsw_le_p(p)
 170 #define ldl_p(p) ldl_le_p(p)
 171 #define ldq_p(p) ldq_le_p(p)
 172 #define ldfl_p(p) ldfl_le_p(p)
 173 #define ldfq_p(p) ldfq_le_p(p)
 174 #define stw_p(p, v) stw_le_p(p, v)
 175 #define stl_p(p, v) stl_le_p(p, v)
 176 #define stq_p(p, v) stq_le_p(p, v)
 177 #define stfl_p(p, v) stfl_le_p(p, v)
 178 #define stfq_p(p, v) stfq_le_p(p, v)
 179 #endif
 180
 181 /* MMU memory access macros */
 182
 183 #if defined(CONFIG_USER_ONLY)
 184 #include <assert.h>
 185 #include "exec/user/abitypes.h"
 186
 187 /* On some host systems the guest address space is reserved on the host.
 188  * This allows the guest address space to be offset to a convenient location.
 189  */
 190 #if defined(CONFIG_USE_GUEST_BASE)
 191 extern unsigned long guest_base;
 192 extern int have_guest_base;
 193 extern unsigned long reserved_va;
 194 #define GUEST_BASE guest_base
 195 #define RESERVED_VA reserved_va
 196 #else
 197 #define GUEST_BASE 0ul
 198 #define RESERVED_VA 0ul
 199 #endif
 200
 201 #define GUEST_ADDR_MAX (RESERVED_VA ? RESERVED_VA : \
 202                                     (1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)
 203 #endif
 204
 205 /* page related stuff */
 206
 207 #define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)
 208 #define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)
 209 #define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)
 210
 211 /* ??? These should be the larger of uintptr_t and target_ulong.  */
 212 extern uintptr_t qemu_real_host_page_size;
 213 extern uintptr_t qemu_host_page_size;
 214 extern uintptr_t qemu_host_page_mask;
 215
 216 #define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask)
 217
 218 /* same as PROT_xxx */
 219 #define PAGE_READ      0x0001
 220 #define PAGE_WRITE     0x0002
 221 #define PAGE_EXEC      0x0004
 222 #define PAGE_BITS      (PAGE_READ | PAGE_WRITE | PAGE_EXEC)
 223 #define PAGE_VALID     0x0008
 224 /* original state of the write flag (used when tracking self-modifying
 225    code */
 226 #define PAGE_WRITE_ORG 0x0010
 227 #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
 228 /* FIXME: Code that sets/uses this is broken and needs to go away.  */
 229 #define PAGE_RESERVED  0x0020
 230 #endif
 231
 232 #if defined(CONFIG_USER_ONLY)
 233 void page_dump(FILE *f);
 234
 235 typedef int (*walk_memory_regions_fn)(void *, target_ulong,
 236                                       target_ulong, unsigned long);
 237 int walk_memory_regions(void *, walk_memory_regions_fn);
 238
 239 int page_get_flags(target_ulong address);
 240 void page_set_flags(target_ulong start, target_ulong end, int flags);
 241 int page_check_range(target_ulong start, target_ulong len, int flags);
 242 #endif
 243
 244 CPUArchState *cpu_copy(CPUArchState *env);
 245
 246 /* Flags for use in ENV->INTERRUPT_PENDING.
 247
 248    The numbers assigned here are non-sequential in order to preserve
 249    binary compatibility with the vmstate dump.  Bit 0 (0x0001) was
 250    previously used for CPU_INTERRUPT_EXIT, and is cleared when loading
 251    the vmstate dump.  */
 252
 253 /* External hardware interrupt pending.  This is typically used for
 254    interrupts from devices.  */
 255 #define CPU_INTERRUPT_HARD        0x0002
 256
 257 /* Exit the current TB.  This is typically used when some system-level device
 258    makes some change to the memory mapping.  E.g. the a20 line change.  */
 259 #define CPU_INTERRUPT_EXITTB      0x0004
 260
 261 /* Halt the CPU.  */
 262 #define CPU_INTERRUPT_HALT        0x0020
 263
 264 /* Debug event pending.  */
 265 #define CPU_INTERRUPT_DEBUG       0x0080
 266
 267 /* Reset signal.  */
 268 #define CPU_INTERRUPT_RESET       0x0400
 269
 270 /* Several target-specific external hardware interrupts.  Each target/cpu.h
 271    should define proper names based on these defines.  */
 272 #define CPU_INTERRUPT_TGT_EXT_0   0x0008
 273 #define CPU_INTERRUPT_TGT_EXT_1   0x0010
 274 #define CPU_INTERRUPT_TGT_EXT_2   0x0040
 275 #define CPU_INTERRUPT_TGT_EXT_3   0x0200
 276 #define CPU_INTERRUPT_TGT_EXT_4   0x1000
 277
 278 /* Several target-specific internal interrupts.  These differ from the
 279    preceding target-specific interrupts in that they are intended to
 280    originate from within the cpu itself, typically in response to some
 281    instruction being executed.  These, therefore, are not masked while
 282    single-stepping within the debugger.  */
 283 #define CPU_INTERRUPT_TGT_INT_0   0x0100
 284 #define CPU_INTERRUPT_TGT_INT_1   0x0800
 285 #define CPU_INTERRUPT_TGT_INT_2   0x2000
 286
 287 /* First unused bit: 0x4000.  */
 288
 289 /* The set of all bits that should be masked when single-stepping.  */
 290 #define CPU_INTERRUPT_SSTEP_MASK \
 291     (CPU_INTERRUPT_HARD          \
 292      | CPU_INTERRUPT_TGT_EXT_0   \
 293      | CPU_INTERRUPT_TGT_EXT_1   \
 294      | CPU_INTERRUPT_TGT_EXT_2   \
 295      | CPU_INTERRUPT_TGT_EXT_3   \
 296      | CPU_INTERRUPT_TGT_EXT_4)
 297
 298 #if !defined(CONFIG_USER_ONLY)
 299
 300 /* memory API */
 301
 302 typedef struct RAMBlock RAMBlock;
 303
 304 struct RAMBlock {
 305     struct MemoryRegion *mr;
 306     uint8_t *host;
 307     ram_addr_t offset;
 308     ram_addr_t used_length;
 309     ram_addr_t max_length;
 310     void (*resized)(const char*, uint64_t length, void *host);
 311     uint32_t flags;
 312     char idstr[256];
 313     /* Reads can take either the iothread or the ramlist lock.
 314      * Writes must take both locks.
 315      */
 316     QTAILQ_ENTRY(RAMBlock) next;
 317     int fd;
 318 };
 319
 320 static inline void *ramblock_ptr(RAMBlock *block, ram_addr_t offset)
 321 {
 322     assert(offset < block->used_length);
 323     assert(block->host);
 324     return (char *)block->host + offset;
 325 }
 326
 327 typedef struct RAMList {
 328     QemuMutex mutex;
 329     /* Protected by the iothread lock.  */
 330     unsigned long *dirty_memory[DIRTY_MEMORY_NUM];
 331     RAMBlock *mru_block;
 332     /* Protected by the ramlist lock.  */
 333     QTAILQ_HEAD(, RAMBlock) blocks;
 334     uint32_t version;
 335 } RAMList;
 336 extern RAMList ram_list;
 337
 338 /* Flags stored in the low bits of the TLB virtual address.  These are
 339    defined so that fast path ram access is all zeros.  */
 340 /* Zero if TLB entry is valid.  */
 341 #define TLB_INVALID_MASK   (1 << 3)
 342 /* Set if TLB entry references a clean RAM page.  The iotlb entry will
 343    contain the page physical address.  */
 344 #define TLB_NOTDIRTY    (1 << 4)
 345 /* Set if TLB entry is an IO callback.  */
 346 #define TLB_MMIO        (1 << 5)
 347
 348 void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
 349 void dump_opcount_info(FILE *f, fprintf_function cpu_fprintf);
 350 ram_addr_t last_ram_offset(void);
 351 void qemu_mutex_lock_ramlist(void);
 352 void qemu_mutex_unlock_ramlist(void);
 353 #endif /* !CONFIG_USER_ONLY */
 354
 355 int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
 356                         uint8_t *buf, int len, int is_write);
 357
 358 #endif /* CPU_ALL_H */