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 #endif
 202
 203 /* page related stuff */
 204
 205 #define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)
 206 #define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)
 207 #define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)
 208
 209 /* ??? These should be the larger of uintptr_t and target_ulong.  */
 210 extern uintptr_t qemu_real_host_page_size;
 211 extern uintptr_t qemu_host_page_size;
 212 extern uintptr_t qemu_host_page_mask;
 213
 214 #define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask)
 215
 216 /* same as PROT_xxx */
 217 #define PAGE_READ      0x0001
 218 #define PAGE_WRITE     0x0002
 219 #define PAGE_EXEC      0x0004
 220 #define PAGE_BITS      (PAGE_READ | PAGE_WRITE | PAGE_EXEC)
 221 #define PAGE_VALID     0x0008
 222 /* original state of the write flag (used when tracking self-modifying
 223    code */
 224 #define PAGE_WRITE_ORG 0x0010
 225 #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
 226 /* FIXME: Code that sets/uses this is broken and needs to go away.  */
 227 #define PAGE_RESERVED  0x0020
 228 #endif
 229
 230 #if defined(CONFIG_USER_ONLY)
 231 void page_dump(FILE *f);
 232
 233 typedef int (*walk_memory_regions_fn)(void *, abi_ulong,
 234                                       abi_ulong, unsigned long);
 235 int walk_memory_regions(void *, walk_memory_regions_fn);
 236
 237 int page_get_flags(target_ulong address);
 238 void page_set_flags(target_ulong start, target_ulong end, int flags);
 239 int page_check_range(target_ulong start, target_ulong len, int flags);
 240 #endif
 241
 242 CPUArchState *cpu_copy(CPUArchState *env);
 243
 244 /* Flags for use in ENV->INTERRUPT_PENDING.
 245
 246    The numbers assigned here are non-sequential in order to preserve
 247    binary compatibility with the vmstate dump.  Bit 0 (0x0001) was
 248    previously used for CPU_INTERRUPT_EXIT, and is cleared when loading
 249    the vmstate dump.  */
 250
 251 /* External hardware interrupt pending.  This is typically used for
 252    interrupts from devices.  */
 253 #define CPU_INTERRUPT_HARD        0x0002
 254
 255 /* Exit the current TB.  This is typically used when some system-level device
 256    makes some change to the memory mapping.  E.g. the a20 line change.  */
 257 #define CPU_INTERRUPT_EXITTB      0x0004
 258
 259 /* Halt the CPU.  */
 260 #define CPU_INTERRUPT_HALT        0x0020
 261
 262 /* Debug event pending.  */
 263 #define CPU_INTERRUPT_DEBUG       0x0080
 264
 265 /* Reset signal.  */
 266 #define CPU_INTERRUPT_RESET       0x0400
 267
 268 /* Several target-specific external hardware interrupts.  Each target/cpu.h
 269    should define proper names based on these defines.  */
 270 #define CPU_INTERRUPT_TGT_EXT_0   0x0008
 271 #define CPU_INTERRUPT_TGT_EXT_1   0x0010
 272 #define CPU_INTERRUPT_TGT_EXT_2   0x0040
 273 #define CPU_INTERRUPT_TGT_EXT_3   0x0200
 274 #define CPU_INTERRUPT_TGT_EXT_4   0x1000
 275
 276 /* Several target-specific internal interrupts.  These differ from the
 277    preceding target-specific interrupts in that they are intended to
 278    originate from within the cpu itself, typically in response to some
 279    instruction being executed.  These, therefore, are not masked while
 280    single-stepping within the debugger.  */
 281 #define CPU_INTERRUPT_TGT_INT_0   0x0100
 282 #define CPU_INTERRUPT_TGT_INT_1   0x0800
 283 #define CPU_INTERRUPT_TGT_INT_2   0x2000
 284
 285 /* First unused bit: 0x4000.  */
 286
 287 /* The set of all bits that should be masked when single-stepping.  */
 288 #define CPU_INTERRUPT_SSTEP_MASK \
 289     (CPU_INTERRUPT_HARD          \
 290      | CPU_INTERRUPT_TGT_EXT_0   \
 291      | CPU_INTERRUPT_TGT_EXT_1   \
 292      | CPU_INTERRUPT_TGT_EXT_2   \
 293      | CPU_INTERRUPT_TGT_EXT_3   \
 294      | CPU_INTERRUPT_TGT_EXT_4)
 295
 296 #if !defined(CONFIG_USER_ONLY)
 297
 298 /* memory API */
 299
 300 extern ram_addr_t ram_size;
 301
 302 /* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */
 303 #define RAM_PREALLOC_MASK   (1 << 0)
 304
 305 typedef struct RAMBlock {
 306     struct MemoryRegion *mr;
 307     uint8_t *host;
 308     ram_addr_t offset;
 309     ram_addr_t length;
 310     uint32_t flags;
 311     char idstr[256];
 312     /* Reads can take either the iothread or the ramlist lock.
 313      * Writes must take both locks.
 314      */
 315     QTAILQ_ENTRY(RAMBlock) next;
 316     int fd;
 317 } RAMBlock;
 318
 319 typedef struct RAMList {
 320     QemuMutex mutex;
 321     /* Protected by the iothread lock.  */
 322     unsigned long *dirty_memory[DIRTY_MEMORY_NUM];
 323     RAMBlock *mru_block;
 324     /* Protected by the ramlist lock.  */
 325     QTAILQ_HEAD(, RAMBlock) blocks;
 326     uint32_t version;
 327 } RAMList;
 328 extern RAMList ram_list;
 329
 330 extern const char *mem_path;
 331 extern int mem_prealloc;
 332
 333 /* Flags stored in the low bits of the TLB virtual address.  These are
 334    defined so that fast path ram access is all zeros.  */
 335 /* Zero if TLB entry is valid.  */
 336 #define TLB_INVALID_MASK   (1 << 3)
 337 /* Set if TLB entry references a clean RAM page.  The iotlb entry will
 338    contain the page physical address.  */
 339 #define TLB_NOTDIRTY    (1 << 4)
 340 /* Set if TLB entry is an IO callback.  */
 341 #define TLB_MMIO        (1 << 5)
 342
 343 void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
 344 ram_addr_t last_ram_offset(void);
 345 void qemu_mutex_lock_ramlist(void);
 346 void qemu_mutex_unlock_ramlist(void);
 347 #endif /* !CONFIG_USER_ONLY */
 348
 349 int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
 350                         uint8_t *buf, int len, int is_write);
 351
 352 #endif /* CPU_ALL_H */