qemu-common.h

   1 /* Common header file that is included by all of qemu.  */
   2 #ifndef QEMU_COMMON_H
   3 #define QEMU_COMMON_H
   4
   5 #include "compiler.h"
   6 #include "config-host.h"
   7
   8 #if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__) || defined(__ia64__)
   9 #define WORDS_ALIGNED
  10 #endif
  11
  12 #define TFR(expr) do { if ((expr) != -1) break; } while (errno == EINTR)
  13
  14 typedef struct QEMUTimer QEMUTimer;
  15 typedef struct QEMUFile QEMUFile;
  16 typedef struct DeviceState DeviceState;
  17
  18 struct Monitor;
  19 typedef struct Monitor Monitor;
  20 typedef struct MigrationParams MigrationParams;
  21
  22 /* we put basic includes here to avoid repeating them in device drivers */
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <stdarg.h>
  26 #include <stdbool.h>
  27 #include <string.h>
  28 #include <strings.h>
  29 #include <inttypes.h>
  30 #include <limits.h>
  31 #include <time.h>
  32 #include <ctype.h>
  33 #include <errno.h>
  34 #include <unistd.h>
  35 #include <fcntl.h>
  36 #include <sys/stat.h>
  37 #include <sys/time.h>
  38 #include <assert.h>
  39 #include <signal.h>
  40 #include <glib.h>
  41
  42 #ifdef _WIN32
  43 #include "qemu-os-win32.h"
  44 #endif
  45
  46 #ifdef CONFIG_POSIX
  47 #include "qemu-os-posix.h"
  48 #endif
  49
  50 #ifndef O_LARGEFILE
  51 #define O_LARGEFILE 0
  52 #endif
  53 #ifndef O_BINARY
  54 #define O_BINARY 0
  55 #endif
  56 #ifndef MAP_ANONYMOUS
  57 #define MAP_ANONYMOUS MAP_ANON
  58 #endif
  59 #ifndef ENOMEDIUM
  60 #define ENOMEDIUM ENODEV
  61 #endif
  62 #if !defined(ENOTSUP)
  63 #define ENOTSUP 4096
  64 #endif
  65 #if !defined(ECANCELED)
  66 #define ECANCELED 4097
  67 #endif
  68 #ifndef TIME_MAX
  69 #define TIME_MAX LONG_MAX
  70 #endif
  71
  72 /* HOST_LONG_BITS is the size of a native pointer in bits. */
  73 #if UINTPTR_MAX == UINT32_MAX
  74 # define HOST_LONG_BITS 32
  75 #elif UINTPTR_MAX == UINT64_MAX
  76 # define HOST_LONG_BITS 64
  77 #else
  78 # error Unknown pointer size
  79 #endif
  80
  81 #ifndef CONFIG_IOVEC
  82 #define CONFIG_IOVEC
  83 struct iovec {
  84     void *iov_base;
  85     size_t iov_len;
  86 };
  87 /*
  88  * Use the same value as Linux for now.
  89  */
  90 #define IOV_MAX         1024
  91 #else
  92 #include <sys/uio.h>
  93 #endif
  94
  95 typedef int (*fprintf_function)(FILE *f, const char *fmt, ...)
  96     GCC_FMT_ATTR(2, 3);
  97
  98 #ifdef _WIN32
  99 #define fsync _commit
 100 #if !defined(lseek)
 101 # define lseek _lseeki64
 102 #endif
 103 int qemu_ftruncate64(int, int64_t);
 104 #if !defined(ftruncate)
 105 # define ftruncate qemu_ftruncate64
 106 #endif
 107
 108 static inline char *realpath(const char *path, char *resolved_path)
 109 {
 110     _fullpath(resolved_path, path, _MAX_PATH);
 111     return resolved_path;
 112 }
 113 #endif
 114
 115 /* icount */
 116 void configure_icount(const char *option);
 117 extern int use_icount;
 118
 119 /* FIXME: Remove NEED_CPU_H.  */
 120 #ifndef NEED_CPU_H
 121
 122 #include "osdep.h"
 123 #include "bswap.h"
 124
 125 #else
 126
 127 #include "cpu.h"
 128
 129 #endif /* !defined(NEED_CPU_H) */
 130
 131 /* main function, renamed */
 132 #if defined(CONFIG_COCOA)
 133 int qemu_main(int argc, char **argv, char **envp);
 134 #endif
 135
 136 void qemu_get_timedate(struct tm *tm, int offset);
 137 int qemu_timedate_diff(struct tm *tm);
 138
 139 /* cutils.c */
 140 void pstrcpy(char *buf, int buf_size, const char *str);
 141 char *pstrcat(char *buf, int buf_size, const char *s);
 142 int strstart(const char *str, const char *val, const char **ptr);
 143 int stristart(const char *str, const char *val, const char **ptr);
 144 int qemu_strnlen(const char *s, int max_len);
 145 time_t mktimegm(struct tm *tm);
 146 int qemu_fls(int i);
 147 int qemu_fdatasync(int fd);
 148 int fcntl_setfl(int fd, int flag);
 149 int qemu_parse_fd(const char *param);
 150
 151 /*
 152  * strtosz() suffixes used to specify the default treatment of an
 153  * argument passed to strtosz() without an explicit suffix.
 154  * These should be defined using upper case characters in the range
 155  * A-Z, as strtosz() will use qemu_toupper() on the given argument
 156  * prior to comparison.
 157  */
 158 #define STRTOSZ_DEFSUFFIX_TB    'T'
 159 #define STRTOSZ_DEFSUFFIX_GB    'G'
 160 #define STRTOSZ_DEFSUFFIX_MB    'M'
 161 #define STRTOSZ_DEFSUFFIX_KB    'K'
 162 #define STRTOSZ_DEFSUFFIX_B     'B'
 163 int64_t strtosz(const char *nptr, char **end);
 164 int64_t strtosz_suffix(const char *nptr, char **end, const char default_suffix);
 165 int64_t strtosz_suffix_unit(const char *nptr, char **end,
 166                             const char default_suffix, int64_t unit);
 167
 168 /* path.c */
 169 void init_paths(const char *prefix);
 170 const char *path(const char *pathname);
 171
 172 #define qemu_isalnum(c)         isalnum((unsigned char)(c))
 173 #define qemu_isalpha(c)         isalpha((unsigned char)(c))
 174 #define qemu_iscntrl(c)         iscntrl((unsigned char)(c))
 175 #define qemu_isdigit(c)         isdigit((unsigned char)(c))
 176 #define qemu_isgraph(c)         isgraph((unsigned char)(c))
 177 #define qemu_islower(c)         islower((unsigned char)(c))
 178 #define qemu_isprint(c)         isprint((unsigned char)(c))
 179 #define qemu_ispunct(c)         ispunct((unsigned char)(c))
 180 #define qemu_isspace(c)         isspace((unsigned char)(c))
 181 #define qemu_isupper(c)         isupper((unsigned char)(c))
 182 #define qemu_isxdigit(c)        isxdigit((unsigned char)(c))
 183 #define qemu_tolower(c)         tolower((unsigned char)(c))
 184 #define qemu_toupper(c)         toupper((unsigned char)(c))
 185 #define qemu_isascii(c)         isascii((unsigned char)(c))
 186 #define qemu_toascii(c)         toascii((unsigned char)(c))
 187
 188 void *qemu_oom_check(void *ptr);
 189
 190 int qemu_open(const char *name, int flags, ...);
 191 ssize_t qemu_write_full(int fd, const void *buf, size_t count)
 192     QEMU_WARN_UNUSED_RESULT;
 193 ssize_t qemu_send_full(int fd, const void *buf, size_t count, int flags)
 194     QEMU_WARN_UNUSED_RESULT;
 195 ssize_t qemu_recv_full(int fd, void *buf, size_t count, int flags)
 196     QEMU_WARN_UNUSED_RESULT;
 197
 198 #ifndef _WIN32
 199 int qemu_eventfd(int pipefd[2]);
 200 int qemu_pipe(int pipefd[2]);
 201 #endif
 202
 203 #ifdef _WIN32
 204 #define qemu_recv(sockfd, buf, len, flags) recv(sockfd, (void *)buf, len, flags)
 205 #else
 206 #define qemu_recv(sockfd, buf, len, flags) recv(sockfd, buf, len, flags)
 207 #endif
 208
 209 /* Error handling.  */
 210
 211 void QEMU_NORETURN hw_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 212
 213 struct ParallelIOArg {
 214     void *buffer;
 215     int count;
 216 };
 217
 218 typedef int (*DMA_transfer_handler) (void *opaque, int nchan, int pos, int size);
 219
 220 /* A load of opaque types so that device init declarations don't have to
 221    pull in all the real definitions.  */
 222 typedef struct NICInfo NICInfo;
 223 typedef struct HCIInfo HCIInfo;
 224 typedef struct AudioState AudioState;
 225 typedef struct BlockDriverState BlockDriverState;
 226 typedef struct DriveInfo DriveInfo;
 227 typedef struct DisplayState DisplayState;
 228 typedef struct DisplayChangeListener DisplayChangeListener;
 229 typedef struct DisplaySurface DisplaySurface;
 230 typedef struct DisplayAllocator DisplayAllocator;
 231 typedef struct PixelFormat PixelFormat;
 232 typedef struct TextConsole TextConsole;
 233 typedef TextConsole QEMUConsole;
 234 typedef struct CharDriverState CharDriverState;
 235 typedef struct MACAddr MACAddr;
 236 typedef struct VLANState VLANState;
 237 typedef struct VLANClientState VLANClientState;
 238 typedef struct i2c_bus i2c_bus;
 239 typedef struct ISABus ISABus;
 240 typedef struct ISADevice ISADevice;
 241 typedef struct SMBusDevice SMBusDevice;
 242 typedef struct PCIHostState PCIHostState;
 243 typedef struct PCIExpressHost PCIExpressHost;
 244 typedef struct PCIBus PCIBus;
 245 typedef struct PCIDevice PCIDevice;
 246 typedef struct PCIExpressDevice PCIExpressDevice;
 247 typedef struct PCIBridge PCIBridge;
 248 typedef struct PCIEAERMsg PCIEAERMsg;
 249 typedef struct PCIEAERLog PCIEAERLog;
 250 typedef struct PCIEAERErr PCIEAERErr;
 251 typedef struct PCIEPort PCIEPort;
 252 typedef struct PCIESlot PCIESlot;
 253 typedef struct MSIMessage MSIMessage;
 254 typedef struct SerialState SerialState;
 255 typedef struct IRQState *qemu_irq;
 256 typedef struct PCMCIACardState PCMCIACardState;
 257 typedef struct MouseTransformInfo MouseTransformInfo;
 258 typedef struct uWireSlave uWireSlave;
 259 typedef struct I2SCodec I2SCodec;
 260 typedef struct SSIBus SSIBus;
 261 typedef struct EventNotifier EventNotifier;
 262 typedef struct VirtIODevice VirtIODevice;
 263 typedef struct QEMUSGList QEMUSGList;
 264 typedef struct SHPCDevice SHPCDevice;
 265
 266 typedef uint64_t pcibus_t;
 267
 268 typedef enum LostTickPolicy {
 269     LOST_TICK_DISCARD,
 270     LOST_TICK_DELAY,
 271     LOST_TICK_MERGE,
 272     LOST_TICK_SLEW,
 273     LOST_TICK_MAX
 274 } LostTickPolicy;
 275
 276 typedef struct PCIHostDeviceAddress {
 277     unsigned int domain;
 278     unsigned int bus;
 279     unsigned int slot;
 280     unsigned int function;
 281 } PCIHostDeviceAddress;
 282
 283 void tcg_exec_init(unsigned long tb_size);
 284 bool tcg_enabled(void);
 285
 286 void cpu_exec_init_all(void);
 287
 288 /* CPU save/load.  */
 289 void cpu_save(QEMUFile *f, void *opaque);
 290 int cpu_load(QEMUFile *f, void *opaque, int version_id);
 291
 292 /* Unblock cpu */
 293 void qemu_cpu_kick(void *env);
 294 void qemu_cpu_kick_self(void);
 295 int qemu_cpu_is_self(void *env);
 296 bool all_cpu_threads_idle(void);
 297
 298 /* work queue */
 299 struct qemu_work_item {
 300     struct qemu_work_item *next;
 301     void (*func)(void *data);
 302     void *data;
 303     int done;
 304 };
 305
 306 #ifdef CONFIG_USER_ONLY
 307 #define qemu_init_vcpu(env) do { } while (0)
 308 #else
 309 void qemu_init_vcpu(void *env);
 310 #endif
 311
 312
 313 /**
 314  * Sends a (part of) iovec down a socket, yielding when the socket is full, or
 315  * Receives data into a (part of) iovec from a socket,
 316  * yielding when there is no data in the socket.
 317  * The same interface as qemu_sendv_recvv(), with added yielding.
 318  * XXX should mark these as coroutine_fn
 319  */
 320 ssize_t qemu_co_sendv_recvv(int sockfd, struct iovec *iov, unsigned iov_cnt,
 321                             size_t offset, size_t bytes, bool do_send);
 322 #define qemu_co_recvv(sockfd, iov, iov_cnt, offset, bytes) \
 323   qemu_co_sendv_recvv(sockfd, iov, iov_cnt, offset, bytes, false)
 324 #define qemu_co_sendv(sockfd, iov, iov_cnt, offset, bytes) \
 325   qemu_co_sendv_recvv(sockfd, iov, iov_cnt, offset, bytes, true)
 326
 327 /**
 328  * The same as above, but with just a single buffer
 329  */
 330 ssize_t qemu_co_send_recv(int sockfd, void *buf, size_t bytes, bool do_send);
 331 #define qemu_co_recv(sockfd, buf, bytes) \
 332   qemu_co_send_recv(sockfd, buf, bytes, false)
 333 #define qemu_co_send(sockfd, buf, bytes) \
 334   qemu_co_send_recv(sockfd, buf, bytes, true)
 335
 336 typedef struct QEMUIOVector {
 337     struct iovec *iov;
 338     int niov;
 339     int nalloc;
 340     size_t size;
 341 } QEMUIOVector;
 342
 343 void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint);
 344 void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov);
 345 void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len);
 346 void qemu_iovec_concat(QEMUIOVector *dst,
 347                        QEMUIOVector *src, size_t soffset, size_t sbytes);
 348 void qemu_iovec_destroy(QEMUIOVector *qiov);
 349 void qemu_iovec_reset(QEMUIOVector *qiov);
 350 size_t qemu_iovec_to_buf(QEMUIOVector *qiov, size_t offset,
 351                          void *buf, size_t bytes);
 352 size_t qemu_iovec_from_buf(QEMUIOVector *qiov, size_t offset,
 353                            const void *buf, size_t bytes);
 354 size_t qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
 355                          int fillc, size_t bytes);
 356
 357 bool buffer_is_zero(const void *buf, size_t len);
 358
 359 void qemu_progress_init(int enabled, float min_skip);
 360 void qemu_progress_end(void);
 361 void qemu_progress_print(float delta, int max);
 362
 363 #define QEMU_FILE_TYPE_BIOS   0
 364 #define QEMU_FILE_TYPE_KEYMAP 1
 365 char *qemu_find_file(int type, const char *name);
 366
 367 /* OS specific functions */
 368 void os_setup_early_signal_handling(void);
 369 char *os_find_datadir(const char *argv0);
 370 void os_parse_cmd_args(int index, const char *optarg);
 371 void os_pidfile_error(void);
 372
 373 /* Convert a byte between binary and BCD.  */
 374 static inline uint8_t to_bcd(uint8_t val)
 375 {
 376     return ((val / 10) << 4) | (val % 10);
 377 }
 378
 379 static inline uint8_t from_bcd(uint8_t val)
 380 {
 381     return ((val >> 4) * 10) + (val & 0x0f);
 382 }
 383
 384 /* compute with 96 bit intermediate result: (a*b)/c */
 385 static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
 386 {
 387     union {
 388         uint64_t ll;
 389         struct {
 390 #ifdef HOST_WORDS_BIGENDIAN
 391             uint32_t high, low;
 392 #else
 393             uint32_t low, high;
 394 #endif
 395         } l;
 396     } u, res;
 397     uint64_t rl, rh;
 398
 399     u.ll = a;
 400     rl = (uint64_t)u.l.low * (uint64_t)b;
 401     rh = (uint64_t)u.l.high * (uint64_t)b;
 402     rh += (rl >> 32);
 403     res.l.high = rh / c;
 404     res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
 405     return res.ll;
 406 }
 407
 408 /* Round number down to multiple */
 409 #define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m))
 410
 411 /* Round number up to multiple */
 412 #define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m))
 413
 414 #include "module.h"
 415
 416 #endif