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
  35 /* some important defines:
  36  *
  37  * WORDS_ALIGNED : if defined, the host cpu can only make word aligned
  38  * memory accesses.
  39  *
  40  * HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
  41  * otherwise little endian.
  42  *
  43  * (TARGET_WORDS_ALIGNED : same for target cpu (not supported yet))
  44  *
  45  * TARGET_WORDS_BIGENDIAN : same for target cpu
  46  */
  47
  48 #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
  49 #define BSWAP_NEEDED
  50 #endif
  51
  52 #ifdef BSWAP_NEEDED
  53
  54 static inline uint16_t tswap16(uint16_t s)
  55 {
  56     return bswap16(s);
  57 }
  58
  59 static inline uint32_t tswap32(uint32_t s)
  60 {
  61     return bswap32(s);
  62 }
  63
  64 static inline uint64_t tswap64(uint64_t s)
  65 {
  66     return bswap64(s);
  67 }
  68
  69 static inline void tswap16s(uint16_t *s)
  70 {
  71     *s = bswap16(*s);
  72 }
  73
  74 static inline void tswap32s(uint32_t *s)
  75 {
  76     *s = bswap32(*s);
  77 }
  78
  79 static inline void tswap64s(uint64_t *s)
  80 {
  81     *s = bswap64(*s);
  82 }
  83
  84 #else
  85
  86 static inline uint16_t tswap16(uint16_t s)
  87 {
  88     return s;
  89 }
  90
  91 static inline uint32_t tswap32(uint32_t s)
  92 {
  93     return s;
  94 }
  95
  96 static inline uint64_t tswap64(uint64_t s)
  97 {
  98     return s;
  99 }
 100
 101 static inline void tswap16s(uint16_t *s)
 102 {
 103 }
 104
 105 static inline void tswap32s(uint32_t *s)
 106 {
 107 }
 108
 109 static inline void tswap64s(uint64_t *s)
 110 {
 111 }
 112
 113 #endif
 114
 115 #if TARGET_LONG_SIZE == 4
 116 #define tswapl(s) tswap32(s)
 117 #define tswapls(s) tswap32s((uint32_t *)(s))
 118 #define bswaptls(s) bswap32s(s)
 119 #else
 120 #define tswapl(s) tswap64(s)
 121 #define tswapls(s) tswap64s((uint64_t *)(s))
 122 #define bswaptls(s) bswap64s(s)
 123 #endif
 124
 125 /* Target-endianness CPU memory access functions. These fit into the
 126  * {ld,st}{type}{sign}{size}{endian}_p naming scheme described in bswap.h.
 127  */
 128 #if defined(TARGET_WORDS_BIGENDIAN)
 129 #define lduw_p(p) lduw_be_p(p)
 130 #define ldsw_p(p) ldsw_be_p(p)
 131 #define ldl_p(p) ldl_be_p(p)
 132 #define ldq_p(p) ldq_be_p(p)
 133 #define ldfl_p(p) ldfl_be_p(p)
 134 #define ldfq_p(p) ldfq_be_p(p)
 135 #define stw_p(p, v) stw_be_p(p, v)
 136 #define stl_p(p, v) stl_be_p(p, v)
 137 #define stq_p(p, v) stq_be_p(p, v)
 138 #define stfl_p(p, v) stfl_be_p(p, v)
 139 #define stfq_p(p, v) stfq_be_p(p, v)
 140 #else
 141 #define lduw_p(p) lduw_le_p(p)
 142 #define ldsw_p(p) ldsw_le_p(p)
 143 #define ldl_p(p) ldl_le_p(p)
 144 #define ldq_p(p) ldq_le_p(p)
 145 #define ldfl_p(p) ldfl_le_p(p)
 146 #define ldfq_p(p) ldfq_le_p(p)
 147 #define stw_p(p, v) stw_le_p(p, v)
 148 #define stl_p(p, v) stl_le_p(p, v)
 149 #define stq_p(p, v) stq_le_p(p, v)
 150 #define stfl_p(p, v) stfl_le_p(p, v)
 151 #define stfq_p(p, v) stfq_le_p(p, 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 #define GUEST_ADDR_MAX (reserved_va ? reserved_va : \
 167                                     (1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)
 168 #endif
 169
 170 /* page related stuff */
 171
 172 #define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS)
 173 #define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1)
 174 #define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK)
 175
 176 /* Using intptr_t ensures that qemu_*_page_mask is sign-extended even
 177  * when intptr_t is 32-bit and we are aligning a long long.
 178  */
 179 extern uintptr_t qemu_real_host_page_size;
 180 extern intptr_t qemu_real_host_page_mask;
 181 extern uintptr_t qemu_host_page_size;
 182 extern intptr_t qemu_host_page_mask;
 183
 184 #define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask)
 185 #define REAL_HOST_PAGE_ALIGN(addr) (((addr) + qemu_real_host_page_size - 1) & \
 186                                     qemu_real_host_page_mask)
 187
 188 /* same as PROT_xxx */
 189 #define PAGE_READ      0x0001
 190 #define PAGE_WRITE     0x0002
 191 #define PAGE_EXEC      0x0004
 192 #define PAGE_BITS      (PAGE_READ | PAGE_WRITE | PAGE_EXEC)
 193 #define PAGE_VALID     0x0008
 194 /* original state of the write flag (used when tracking self-modifying
 195    code */
 196 #define PAGE_WRITE_ORG 0x0010
 197 #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY)
 198 /* FIXME: Code that sets/uses this is broken and needs to go away.  */
 199 #define PAGE_RESERVED  0x0020
 200 #endif
 201
 202 #if defined(CONFIG_USER_ONLY)
 203 void page_dump(FILE *f);
 204
 205 typedef int (*walk_memory_regions_fn)(void *, target_ulong,
 206                                       target_ulong, unsigned long);
 207 int walk_memory_regions(void *, walk_memory_regions_fn);
 208
 209 int page_get_flags(target_ulong address);
 210 void page_set_flags(target_ulong start, target_ulong end, int flags);
 211 int page_check_range(target_ulong start, target_ulong len, int flags);
 212 #endif
 213
 214 CPUArchState *cpu_copy(CPUArchState *env);
 215
 216 /* Flags for use in ENV->INTERRUPT_PENDING.
 217
 218    The numbers assigned here are non-sequential in order to preserve
 219    binary compatibility with the vmstate dump.  Bit 0 (0x0001) was
 220    previously used for CPU_INTERRUPT_EXIT, and is cleared when loading
 221    the vmstate dump.  */
 222
 223 /* External hardware interrupt pending.  This is typically used for
 224    interrupts from devices.  */
 225 #define CPU_INTERRUPT_HARD        0x0002
 226
 227 /* Exit the current TB.  This is typically used when some system-level device
 228    makes some change to the memory mapping.  E.g. the a20 line change.  */
 229 #define CPU_INTERRUPT_EXITTB      0x0004
 230
 231 /* Halt the CPU.  */
 232 #define CPU_INTERRUPT_HALT        0x0020
 233
 234 /* Debug event pending.  */
 235 #define CPU_INTERRUPT_DEBUG       0x0080
 236
 237 /* Reset signal.  */
 238 #define CPU_INTERRUPT_RESET       0x0400
 239
 240 /* Several target-specific external hardware interrupts.  Each target/cpu.h
 241    should define proper names based on these defines.  */
 242 #define CPU_INTERRUPT_TGT_EXT_0   0x0008
 243 #define CPU_INTERRUPT_TGT_EXT_1   0x0010
 244 #define CPU_INTERRUPT_TGT_EXT_2   0x0040
 245 #define CPU_INTERRUPT_TGT_EXT_3   0x0200
 246 #define CPU_INTERRUPT_TGT_EXT_4   0x1000
 247
 248 /* Several target-specific internal interrupts.  These differ from the
 249    preceding target-specific interrupts in that they are intended to
 250    originate from within the cpu itself, typically in response to some
 251    instruction being executed.  These, therefore, are not masked while
 252    single-stepping within the debugger.  */
 253 #define CPU_INTERRUPT_TGT_INT_0   0x0100
 254 #define CPU_INTERRUPT_TGT_INT_1   0x0800
 255 #define CPU_INTERRUPT_TGT_INT_2   0x2000
 256
 257 /* First unused bit: 0x4000.  */
 258
 259 /* The set of all bits that should be masked when single-stepping.  */
 260 #define CPU_INTERRUPT_SSTEP_MASK \
 261     (CPU_INTERRUPT_HARD          \
 262      | CPU_INTERRUPT_TGT_EXT_0   \
 263      | CPU_INTERRUPT_TGT_EXT_1   \
 264      | CPU_INTERRUPT_TGT_EXT_2   \
 265      | CPU_INTERRUPT_TGT_EXT_3   \
 266      | CPU_INTERRUPT_TGT_EXT_4)
 267
 268 #if !defined(CONFIG_USER_ONLY)
 269
 270 /* Flags stored in the low bits of the TLB virtual address.  These are
 271    defined so that fast path ram access is all zeros.  */
 272 /* Zero if TLB entry is valid.  */
 273 #define TLB_INVALID_MASK   (1 << 3)
 274 /* Set if TLB entry references a clean RAM page.  The iotlb entry will
 275    contain the page physical address.  */
 276 #define TLB_NOTDIRTY    (1 << 4)
 277 /* Set if TLB entry is an IO callback.  */
 278 #define TLB_MMIO        (1 << 5)
 279
 280 void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
 281 void dump_opcount_info(FILE *f, fprintf_function cpu_fprintf);
 282 #endif /* !CONFIG_USER_ONLY */
 283
 284 int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
 285                         uint8_t *buf, int len, int is_write);
 286
 287 #endif /* CPU_ALL_H */