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 #include "qemu/rcu.h"
  28
  29 #define EXCP_INTERRUPT  0x10000 /* async interruption */
  30 #define EXCP_HLT        0x10001 /* hlt instruction reached */
  31 #define EXCP_DEBUG      0x10002 /* cpu stopped after a breakpoint or singlestep */
  32 #define EXCP_HALTED     0x10003 /* cpu is halted (waiting for external event) */
  33 #define EXCP_YIELD      0x10004 /* cpu wants to yield timeslice to another */
  34 #define EXCP_ATOMIC     0x10005 /* stop-the-world and emulate atomic */
  35
  36 /* some important defines:
  37  *
  38  * HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
  39  * otherwise little endian.
  40  *
  41  * TARGET_WORDS_BIGENDIAN : same for target cpu
  42  */
  43
  44 #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
  45 #define BSWAP_NEEDED
  46 #endif
  47
  48 #ifdef BSWAP_NEEDED
  49
  50 static inline uint16_t tswap16(uint16_t s)
  51 {
  52     return bswap16(s);
  53 }
  54
  55 static inline uint32_t tswap32(uint32_t s)
  56 {
  57     return bswap32(s);
  58 }
  59
  60 static inline uint64_t tswap64(uint64_t s)
  61 {
  62     return bswap64(s);
  63 }
  64
  65 static inline void tswap16s(uint16_t *s)
  66 {
  67     *s = bswap16(*s);
  68 }
  69
  70 static inline void tswap32s(uint32_t *s)
  71 {
  72     *s = bswap32(*s);
  73 }
  74
  75 static inline void tswap64s(uint64_t *s)
  76 {
  77     *s = bswap64(*s);
  78 }
  79
  80 #else
  81
  82 static inline uint16_t tswap16(uint16_t s)
  83 {
  84     return s;
  85 }
  86
  87 static inline uint32_t tswap32(uint32_t s)
  88 {
  89     return s;
  90 }
  91
  92 static inline uint64_t tswap64(uint64_t s)
  93 {
  94     return s;
  95 }
  96
  97 static inline void tswap16s(uint16_t *s)
  98 {
  99 }
 100
 101 static inline void tswap32s(uint32_t *s)
 102 {
 103 }
 104
 105 static inline void tswap64s(uint64_t *s)
 106 {
 107 }
 108
 109 #endif
 110
 111 #if TARGET_LONG_SIZE == 4
 112 #define tswapl(s) tswap32(s)
 113 #define tswapls(s) tswap32s((uint32_t *)(s))
 114 #define bswaptls(s) bswap32s(s)
 115 #else
 116 #define tswapl(s) tswap64(s)
 117 #define tswapls(s) tswap64s((uint64_t *)(s))
 118 #define bswaptls(s) bswap64s(s)
 119 #endif
 120
 121 /* Target-endianness CPU memory access functions. These fit into the
 122  * {ld,st}{type}{sign}{size}{endian}_p naming scheme described in bswap.h.
 123  */
 124 #if defined(TARGET_WORDS_BIGENDIAN)
 125 #define lduw_p(p) lduw_be_p(p)
 126 #define ldsw_p(p) ldsw_be_p(p)
 127 #define ldl_p(p) ldl_be_p(p)
 128 #define ldq_p(p) ldq_be_p(p)
 129 #define ldfl_p(p) ldfl_be_p(p)
 130 #define ldfq_p(p) ldfq_be_p(p)
 131 #define stw_p(p, v) stw_be_p(p, v)
 132 #define stl_p(p, v) stl_be_p(p, v)
 133 #define stq_p(p, v) stq_be_p(p, v)
 134 #define stfl_p(p, v) stfl_be_p(p, v)
 135 #define stfq_p(p, v) stfq_be_p(p, v)
 136 #define ldn_p(p, sz) ldn_be_p(p, sz)
 137 #define stn_p(p, sz, v) stn_be_p(p, sz, v)
 138 #else
 139 #define lduw_p(p) lduw_le_p(p)
 140 #define ldsw_p(p) ldsw_le_p(p)
 141 #define ldl_p(p) ldl_le_p(p)
 142 #define ldq_p(p) ldq_le_p(p)
 143 #define ldfl_p(p) ldfl_le_p(p)
 144 #define ldfq_p(p) ldfq_le_p(p)
 145 #define stw_p(p, v) stw_le_p(p, v)
 146 #define stl_p(p, v) stl_le_p(p, v)
 147 #define stq_p(p, v) stq_le_p(p, v)
 148 #define stfl_p(p, v) stfl_le_p(p, v)
 149 #define stfq_p(p, v) stfq_le_p(p, v)
 150 #define ldn_p(p, sz) ldn_le_p(p, sz)
 151 #define stn_p(p, sz, v) stn_le_p(p, sz, v)
 152 #endif
 153
 154 /* MMU memory access macros */
 155
 156 #if defined(CONFIG_USER_ONLY)
 157 #include "exec/user/abitypes.h"
 158
 159 /* On some host systems the guest address space is reserved on the host.
 160  * This allows the guest address space to be offset to a convenient location.
 161  */
 162 extern unsigned long guest_base;
 163 extern int have_guest_base;
 164 extern unsigned long reserved_va;
 165
 166 #if HOST_LONG_BITS <= TARGET_VIRT_ADDR_SPACE_BITS
 167 #define GUEST_ADDR_MAX (~0ul)
 168 #else
 169 #define GUEST_ADDR_MAX (reserved_va ? reserved_va - 1 : \
 170                                     (1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)
 171 #endif
 172 #else
 173
 174 #include "exec/hwaddr.h"
 175
 176 #define SUFFIX
 177 #define ARG1         as
 178 #define ARG1_DECL    AddressSpace *as
 179 #define TARGET_ENDIANNESS
 180 #include "exec/memory_ldst.inc.h"
 181
 182 #define SUFFIX       _cached_slow
 183 #define ARG1         cache
 184 #define ARG1_DECL    MemoryRegionCache *cache
 185 #define TARGET_ENDIANNESS
 186 #include "exec/memory_ldst.inc.h"
 187
 188 static inline void stl_phys_notdirty(AddressSpace *as, hwaddr addr, uint32_t val)
 189 {
 190     address_space_stl_notdirty(as, addr, val,
 191                                MEMTXATTRS_UNSPECIFIED, NULL);
 192 }
 193
 194 #define SUFFIX
 195 #define ARG1         as
 196 #define ARG1_DECL    AddressSpace *as
 197 #define TARGET_ENDIANNESS
 198 #include "exec/memory_ldst_phys.inc.h"
 199
 200 /* Inline fast path for direct RAM access.  */
 201 #define ENDIANNESS
 202 #include "exec/memory_ldst_cached.inc.h"
 203
 204 #define SUFFIX       _cached
 205 #define ARG1         cache
 206 #define ARG1_DECL    MemoryRegionCache *cache
 207 #define TARGET_ENDIANNESS
 208 #include "exec/memory_ldst_phys.inc.h"
 209 #endif
 210
 211 /* page related stuff */
 212
 213 #ifdef TARGET_PAGE_BITS_VARY
 214 extern bool target_page_bits_decided;
 215 extern int target_page_bits;
 216 #define TARGET_PAGE_BITS ({ assert(target_page_bits_decided); \
 217                             target_page_bits; })
 218 #else
 219 #define TARGET_PAGE_BITS_MIN TARGET_PAGE_BITS
 220 #endif
 221
 222 #define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)
 223 #define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)
 224 #define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)
 225
 226 /* Using intptr_t ensures that qemu_*_page_mask is sign-extended even
 227  * when intptr_t is 32-bit and we are aligning a long long.
 228  */
 229 extern uintptr_t qemu_host_page_size;
 230 extern intptr_t qemu_host_page_mask;
 231
 232 #define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask)
 233 #define REAL_HOST_PAGE_ALIGN(addr) (((addr) + qemu_real_host_page_size - 1) & \
 234                                     qemu_real_host_page_mask)
 235
 236 /* same as PROT_xxx */
 237 #define PAGE_READ      0x0001
 238 #define PAGE_WRITE     0x0002
 239 #define PAGE_EXEC      0x0004
 240 #define PAGE_BITS      (PAGE_READ | PAGE_WRITE | PAGE_EXEC)
 241 #define PAGE_VALID     0x0008
 242 /* original state of the write flag (used when tracking self-modifying
 243    code */
 244 #define PAGE_WRITE_ORG 0x0010
 245 /* Invalidate the TLB entry immediately, helpful for s390x
 246  * Low-Address-Protection. Used with PAGE_WRITE in tlb_set_page_with_attrs() */
 247 #define PAGE_WRITE_INV 0x0040
 248 #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
 249 /* FIXME: Code that sets/uses this is broken and needs to go away.  */
 250 #define PAGE_RESERVED  0x0020
 251 #endif
 252
 253 #if defined(CONFIG_USER_ONLY)
 254 void page_dump(FILE *f);
 255
 256 typedef int (*walk_memory_regions_fn)(void *, target_ulong,
 257                                       target_ulong, unsigned long);
 258 int walk_memory_regions(void *, walk_memory_regions_fn);
 259
 260 int page_get_flags(target_ulong address);
 261 void page_set_flags(target_ulong start, target_ulong end, int flags);
 262 int page_check_range(target_ulong start, target_ulong len, int flags);
 263 #endif
 264
 265 CPUArchState *cpu_copy(CPUArchState *env);
 266
 267 /* Flags for use in ENV->INTERRUPT_PENDING.
 268
 269    The numbers assigned here are non-sequential in order to preserve
 270    binary compatibility with the vmstate dump.  Bit 0 (0x0001) was
 271    previously used for CPU_INTERRUPT_EXIT, and is cleared when loading
 272    the vmstate dump.  */
 273
 274 /* External hardware interrupt pending.  This is typically used for
 275    interrupts from devices.  */
 276 #define CPU_INTERRUPT_HARD        0x0002
 277
 278 /* Exit the current TB.  This is typically used when some system-level device
 279    makes some change to the memory mapping.  E.g. the a20 line change.  */
 280 #define CPU_INTERRUPT_EXITTB      0x0004
 281
 282 /* Halt the CPU.  */
 283 #define CPU_INTERRUPT_HALT        0x0020
 284
 285 /* Debug event pending.  */
 286 #define CPU_INTERRUPT_DEBUG       0x0080
 287
 288 /* Reset signal.  */
 289 #define CPU_INTERRUPT_RESET       0x0400
 290
 291 /* Several target-specific external hardware interrupts.  Each target/cpu.h
 292    should define proper names based on these defines.  */
 293 #define CPU_INTERRUPT_TGT_EXT_0   0x0008
 294 #define CPU_INTERRUPT_TGT_EXT_1   0x0010
 295 #define CPU_INTERRUPT_TGT_EXT_2   0x0040
 296 #define CPU_INTERRUPT_TGT_EXT_3   0x0200
 297 #define CPU_INTERRUPT_TGT_EXT_4   0x1000
 298
 299 /* Several target-specific internal interrupts.  These differ from the
 300    preceding target-specific interrupts in that they are intended to
 301    originate from within the cpu itself, typically in response to some
 302    instruction being executed.  These, therefore, are not masked while
 303    single-stepping within the debugger.  */
 304 #define CPU_INTERRUPT_TGT_INT_0   0x0100
 305 #define CPU_INTERRUPT_TGT_INT_1   0x0800
 306 #define CPU_INTERRUPT_TGT_INT_2   0x2000
 307
 308 /* First unused bit: 0x4000.  */
 309
 310 /* The set of all bits that should be masked when single-stepping.  */
 311 #define CPU_INTERRUPT_SSTEP_MASK \
 312     (CPU_INTERRUPT_HARD          \
 313      | CPU_INTERRUPT_TGT_EXT_0   \
 314      | CPU_INTERRUPT_TGT_EXT_1   \
 315      | CPU_INTERRUPT_TGT_EXT_2   \
 316      | CPU_INTERRUPT_TGT_EXT_3   \
 317      | CPU_INTERRUPT_TGT_EXT_4)
 318
 319 #if !defined(CONFIG_USER_ONLY)
 320
 321 /* Flags stored in the low bits of the TLB virtual address.  These are
 322  * defined so that fast path ram access is all zeros.
 323  * The flags all must be between TARGET_PAGE_BITS and
 324  * maximum address alignment bit.
 325  */
 326 /* Zero if TLB entry is valid.  */
 327 #define TLB_INVALID_MASK    (1 << (TARGET_PAGE_BITS - 1))
 328 /* Set if TLB entry references a clean RAM page.  The iotlb entry will
 329    contain the page physical address.  */
 330 #define TLB_NOTDIRTY        (1 << (TARGET_PAGE_BITS - 2))
 331 /* Set if TLB entry is an IO callback.  */
 332 #define TLB_MMIO            (1 << (TARGET_PAGE_BITS - 3))
 333 /* Set if TLB entry must have MMU lookup repeated for every access */
 334 #define TLB_RECHECK         (1 << (TARGET_PAGE_BITS - 4))
 335
 336 /* Use this mask to check interception with an alignment mask
 337  * in a TCG backend.
 338  */
 339 #define TLB_FLAGS_MASK  (TLB_INVALID_MASK | TLB_NOTDIRTY | TLB_MMIO \
 340                          | TLB_RECHECK)
 341
 342 /**
 343  * tlb_hit_page: return true if page aligned @addr is a hit against the
 344  * TLB entry @tlb_addr
 345  *
 346  * @addr: virtual address to test (must be page aligned)
 347  * @tlb_addr: TLB entry address (a CPUTLBEntry addr_read/write/code value)
 348  */
 349 static inline bool tlb_hit_page(target_ulong tlb_addr, target_ulong addr)
 350 {
 351     return addr == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK));
 352 }
 353
 354 /**
 355  * tlb_hit: return true if @addr is a hit against the TLB entry @tlb_addr
 356  *
 357  * @addr: virtual address to test (need not be page aligned)
 358  * @tlb_addr: TLB entry address (a CPUTLBEntry addr_read/write/code value)
 359  */
 360 static inline bool tlb_hit(target_ulong tlb_addr, target_ulong addr)
 361 {
 362     return tlb_hit_page(tlb_addr, addr & TARGET_PAGE_MASK);
 363 }
 364
 365 void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
 366 void dump_opcount_info(FILE *f, fprintf_function cpu_fprintf);
 367 #endif /* !CONFIG_USER_ONLY */
 368
 369 int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
 370                         uint8_t *buf, int len, int is_write);
 371
 372 int cpu_exec(CPUState *cpu);
 373
 374 #endif /* CPU_ALL_H */