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 <assert.h> 158 #include "exec/user/abitypes.h" 159 160 /* On some host systems the guest address space is reserved on the host. 161 * This allows the guest address space to be offset to a convenient location. 162 */ 163 extern unsigned long guest_base; 164 extern int have_guest_base; 165 extern unsigned long reserved_va; 166 167 #define GUEST_ADDR_MAX (reserved_va ? reserved_va : \ 168 (1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1) 169 #endif 170 171 /* page related stuff */ 172 173 #define TARGET_PAGE_SIZE (1 << TARGET_PAGE_BITS) 174 #define TARGET_PAGE_MASK ~(TARGET_PAGE_SIZE - 1) 175 #define TARGET_PAGE_ALIGN(addr) (((addr) + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK) 176 177 /* ??? These should be the larger of uintptr_t and target_ulong. */ 178 extern uintptr_t qemu_real_host_page_size; 179 extern uintptr_t qemu_real_host_page_mask; 180 extern uintptr_t qemu_host_page_size; 181 extern uintptr_t qemu_host_page_mask; 182 183 #define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask) 184 #define REAL_HOST_PAGE_ALIGN(addr) (((addr) + qemu_real_host_page_size - 1) & \ 185 qemu_real_host_page_mask) 186 187 /* same as PROT_xxx */ 188 #define PAGE_READ 0x0001 189 #define PAGE_WRITE 0x0002 190 #define PAGE_EXEC 0x0004 191 #define PAGE_BITS (PAGE_READ | PAGE_WRITE | PAGE_EXEC) 192 #define PAGE_VALID 0x0008 193 /* original state of the write flag (used when tracking self-modifying 194 code */ 195 #define PAGE_WRITE_ORG 0x0010 196 #if defined(CONFIG_BSD) && defined(CONFIG_USER_ONLY) 197 /* FIXME: Code that sets/uses this is broken and needs to go away. */ 198 #define PAGE_RESERVED 0x0020 199 #endif 200 201 #if defined(CONFIG_USER_ONLY) 202 void page_dump(FILE *f); 203 204 typedef int (*walk_memory_regions_fn)(void *, target_ulong, 205 target_ulong, unsigned long); 206 int walk_memory_regions(void *, walk_memory_regions_fn); 207 208 int page_get_flags(target_ulong address); 209 void page_set_flags(target_ulong start, target_ulong end, int flags); 210 int page_check_range(target_ulong start, target_ulong len, int flags); 211 #endif 212 213 CPUArchState *cpu_copy(CPUArchState *env); 214 215 /* Flags for use in ENV->INTERRUPT_PENDING. 216 217 The numbers assigned here are non-sequential in order to preserve 218 binary compatibility with the vmstate dump. Bit 0 (0x0001) was 219 previously used for CPU_INTERRUPT_EXIT, and is cleared when loading 220 the vmstate dump. */ 221 222 /* External hardware interrupt pending. This is typically used for 223 interrupts from devices. */ 224 #define CPU_INTERRUPT_HARD 0x0002 225 226 /* Exit the current TB. This is typically used when some system-level device 227 makes some change to the memory mapping. E.g. the a20 line change. */ 228 #define CPU_INTERRUPT_EXITTB 0x0004 229 230 /* Halt the CPU. */ 231 #define CPU_INTERRUPT_HALT 0x0020 232 233 /* Debug event pending. */ 234 #define CPU_INTERRUPT_DEBUG 0x0080 235 236 /* Reset signal. */ 237 #define CPU_INTERRUPT_RESET 0x0400 238 239 /* Several target-specific external hardware interrupts. Each target/cpu.h 240 should define proper names based on these defines. */ 241 #define CPU_INTERRUPT_TGT_EXT_0 0x0008 242 #define CPU_INTERRUPT_TGT_EXT_1 0x0010 243 #define CPU_INTERRUPT_TGT_EXT_2 0x0040 244 #define CPU_INTERRUPT_TGT_EXT_3 0x0200 245 #define CPU_INTERRUPT_TGT_EXT_4 0x1000 246 247 /* Several target-specific internal interrupts. These differ from the 248 preceding target-specific interrupts in that they are intended to 249 originate from within the cpu itself, typically in response to some 250 instruction being executed. These, therefore, are not masked while 251 single-stepping within the debugger. */ 252 #define CPU_INTERRUPT_TGT_INT_0 0x0100 253 #define CPU_INTERRUPT_TGT_INT_1 0x0800 254 #define CPU_INTERRUPT_TGT_INT_2 0x2000 255 256 /* First unused bit: 0x4000. */ 257 258 /* The set of all bits that should be masked when single-stepping. */ 259 #define CPU_INTERRUPT_SSTEP_MASK \ 260 (CPU_INTERRUPT_HARD \ 261 | CPU_INTERRUPT_TGT_EXT_0 \ 262 | CPU_INTERRUPT_TGT_EXT_1 \ 263 | CPU_INTERRUPT_TGT_EXT_2 \ 264 | CPU_INTERRUPT_TGT_EXT_3 \ 265 | CPU_INTERRUPT_TGT_EXT_4) 266 267 #if !defined(CONFIG_USER_ONLY) 268 269 /* memory API */ 270 271 typedef struct RAMBlock RAMBlock; 272 273 struct RAMBlock { 274 struct rcu_head rcu; 275 struct MemoryRegion *mr; 276 uint8_t *host; 277 ram_addr_t offset; 278 ram_addr_t used_length; 279 ram_addr_t max_length; 280 void (*resized)(const char*, uint64_t length, void *host); 281 uint32_t flags; 282 /* Protected by iothread lock. */ 283 char idstr[256]; 284 /* RCU-enabled, writes protected by the ramlist lock */ 285 QLIST_ENTRY(RAMBlock) next; 286 int fd; 287 }; 288 289 static inline void *ramblock_ptr(RAMBlock *block, ram_addr_t offset) 290 { 291 assert(offset < block->used_length); 292 assert(block->host); 293 return (char *)block->host + offset; 294 } 295 296 typedef struct RAMList { 297 QemuMutex mutex; 298 /* Protected by the iothread lock. */ 299 unsigned long *dirty_memory[DIRTY_MEMORY_NUM]; 300 RAMBlock *mru_block; 301 /* RCU-enabled, writes protected by the ramlist lock. */ 302 QLIST_HEAD(, RAMBlock) blocks; 303 uint32_t version; 304 } RAMList; 305 extern RAMList ram_list; 306 307 /* Flags stored in the low bits of the TLB virtual address. These are 308 defined so that fast path ram access is all zeros. */ 309 /* Zero if TLB entry is valid. */ 310 #define TLB_INVALID_MASK (1 << 3) 311 /* Set if TLB entry references a clean RAM page. The iotlb entry will 312 contain the page physical address. */ 313 #define TLB_NOTDIRTY (1 << 4) 314 /* Set if TLB entry is an IO callback. */ 315 #define TLB_MMIO (1 << 5) 316 317 void dump_exec_info(FILE *f, fprintf_function cpu_fprintf); 318 void dump_opcount_info(FILE *f, fprintf_function cpu_fprintf); 319 ram_addr_t last_ram_offset(void); 320 void qemu_mutex_lock_ramlist(void); 321 void qemu_mutex_unlock_ramlist(void); 322 #endif /* !CONFIG_USER_ONLY */ 323 324 int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr, 325 uint8_t *buf, int len, int is_write); 326 327 #endif /* CPU_ALL_H */ 328