pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 1 | #ifndef QEMU_TIMER_H |
| 2 | #define QEMU_TIMER_H |
| 3 | |
Blue Swirl | 29e922b | 2010-03-29 19:24:00 +0000 | [diff] [blame] | 4 | #include "qemu-common.h" |
Blue Swirl | c57c846 | 2010-10-23 15:24:07 +0000 | [diff] [blame] | 5 | #include <time.h> |
| 6 | #include <sys/time.h> |
| 7 | |
| 8 | #ifdef _WIN32 |
| 9 | #include <windows.h> |
Blue Swirl | c57c846 | 2010-10-23 15:24:07 +0000 | [diff] [blame] | 10 | #endif |
Blue Swirl | 29e922b | 2010-03-29 19:24:00 +0000 | [diff] [blame] | 11 | |
pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 12 | /* timers */ |
| 13 | |
Paolo Bonzini | 0ce1b94 | 2011-03-11 16:46:02 +0100 | [diff] [blame] | 14 | #define SCALE_MS 1000000 |
| 15 | #define SCALE_US 1000 |
| 16 | #define SCALE_NS 1 |
| 17 | |
pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 18 | typedef struct QEMUClock QEMUClock; |
| 19 | typedef void QEMUTimerCB(void *opaque); |
| 20 | |
| 21 | /* The real time clock should be used only for stuff which does not |
| 22 | change the virtual machine state, as it is run even if the virtual |
| 23 | machine is stopped. The real time clock has a frequency of 1000 |
| 24 | Hz. */ |
| 25 | extern QEMUClock *rt_clock; |
| 26 | |
| 27 | /* The virtual clock is only run during the emulation. It is stopped |
| 28 | when the virtual machine is stopped. Virtual timers use a high |
| 29 | precision clock, usually cpu cycles (use ticks_per_sec). */ |
| 30 | extern QEMUClock *vm_clock; |
| 31 | |
Jan Kiszka | 21d5d12 | 2009-09-15 13:36:04 +0200 | [diff] [blame] | 32 | /* The host clock should be use for device models that emulate accurate |
| 33 | real time sources. It will continue to run when the virtual machine |
| 34 | is suspended, and it will reflect system time changes the host may |
| 35 | undergo (e.g. due to NTP). The host clock has the same precision as |
| 36 | the virtual clock. */ |
| 37 | extern QEMUClock *host_clock; |
| 38 | |
Paolo Bonzini | 41c872b | 2010-01-26 10:31:46 +0200 | [diff] [blame] | 39 | int64_t qemu_get_clock_ns(QEMUClock *clock); |
Paolo Bonzini | db1a497 | 2010-03-10 11:38:55 +0100 | [diff] [blame] | 40 | void qemu_clock_enable(QEMUClock *clock, int enabled); |
Paolo Bonzini | ab33fcd | 2011-04-13 10:03:44 +0200 | [diff] [blame] | 41 | void qemu_clock_warp(QEMUClock *clock); |
pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 42 | |
Paolo Bonzini | 4a99874 | 2011-03-11 16:33:58 +0100 | [diff] [blame] | 43 | QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale, |
| 44 | QEMUTimerCB *cb, void *opaque); |
pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 45 | void qemu_free_timer(QEMUTimer *ts); |
| 46 | void qemu_del_timer(QEMUTimer *ts); |
| 47 | void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time); |
| 48 | int qemu_timer_pending(QEMUTimer *ts); |
Stefano Stabellini | 2430ffe | 2009-08-03 10:56:01 +0100 | [diff] [blame] | 49 | int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time); |
pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 50 | |
Paolo Bonzini | db1a497 | 2010-03-10 11:38:55 +0100 | [diff] [blame] | 51 | void qemu_run_all_timers(void); |
| 52 | int qemu_alarm_pending(void); |
Paolo Bonzini | cb842c9 | 2011-04-13 10:03:46 +0200 | [diff] [blame] | 53 | int64_t qemu_next_icount_deadline(void); |
Paolo Bonzini | db1a497 | 2010-03-10 11:38:55 +0100 | [diff] [blame] | 54 | void configure_alarms(char const *opt); |
| 55 | void configure_icount(const char *option); |
| 56 | int qemu_calculate_timeout(void); |
| 57 | void init_clocks(void); |
| 58 | int init_timer_alarm(void); |
| 59 | void quit_timers(void); |
| 60 | |
Blue Swirl | 70c3b55 | 2011-03-27 15:45:39 +0000 | [diff] [blame] | 61 | int64_t cpu_get_ticks(void); |
| 62 | void cpu_enable_ticks(void); |
| 63 | void cpu_disable_ticks(void); |
| 64 | |
Paolo Bonzini | 0ce1b94 | 2011-03-11 16:46:02 +0100 | [diff] [blame] | 65 | static inline QEMUTimer *qemu_new_timer_ns(QEMUClock *clock, QEMUTimerCB *cb, |
| 66 | void *opaque) |
| 67 | { |
Paolo Bonzini | 4a99874 | 2011-03-11 16:33:58 +0100 | [diff] [blame] | 68 | return qemu_new_timer(clock, SCALE_NS, cb, opaque); |
Paolo Bonzini | 0ce1b94 | 2011-03-11 16:46:02 +0100 | [diff] [blame] | 69 | } |
| 70 | |
| 71 | static inline QEMUTimer *qemu_new_timer_ms(QEMUClock *clock, QEMUTimerCB *cb, |
| 72 | void *opaque) |
| 73 | { |
Paolo Bonzini | 4a99874 | 2011-03-11 16:33:58 +0100 | [diff] [blame] | 74 | return qemu_new_timer(clock, SCALE_MS, cb, opaque); |
Paolo Bonzini | 0ce1b94 | 2011-03-11 16:46:02 +0100 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | static inline int64_t qemu_get_clock_ms(QEMUClock *clock) |
| 78 | { |
| 79 | return qemu_get_clock_ns(clock) / SCALE_MS; |
| 80 | } |
| 81 | |
Anthony Liguori | 274dfed | 2009-09-11 10:28:26 -0500 | [diff] [blame] | 82 | static inline int64_t get_ticks_per_sec(void) |
| 83 | { |
| 84 | return 1000000000LL; |
| 85 | } |
pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 86 | |
Blue Swirl | c57c846 | 2010-10-23 15:24:07 +0000 | [diff] [blame] | 87 | /* real time host monotonic timer */ |
| 88 | static inline int64_t get_clock_realtime(void) |
| 89 | { |
| 90 | struct timeval tv; |
| 91 | |
| 92 | gettimeofday(&tv, NULL); |
| 93 | return tv.tv_sec * 1000000000LL + (tv.tv_usec * 1000); |
| 94 | } |
| 95 | |
| 96 | /* Warning: don't insert tracepoints into these functions, they are |
| 97 | also used by simpletrace backend and tracepoints would cause |
| 98 | an infinite recursion! */ |
| 99 | #ifdef _WIN32 |
| 100 | extern int64_t clock_freq; |
| 101 | |
| 102 | static inline int64_t get_clock(void) |
| 103 | { |
| 104 | LARGE_INTEGER ti; |
| 105 | QueryPerformanceCounter(&ti); |
| 106 | return muldiv64(ti.QuadPart, get_ticks_per_sec(), clock_freq); |
| 107 | } |
| 108 | |
| 109 | #else |
| 110 | |
| 111 | extern int use_rt_clock; |
| 112 | |
| 113 | static inline int64_t get_clock(void) |
| 114 | { |
| 115 | #if defined(__linux__) || (defined(__FreeBSD__) && __FreeBSD_version >= 500000) \ |
| 116 | || defined(__DragonFly__) || defined(__FreeBSD_kernel__) |
| 117 | if (use_rt_clock) { |
| 118 | struct timespec ts; |
| 119 | clock_gettime(CLOCK_MONOTONIC, &ts); |
| 120 | return ts.tv_sec * 1000000000LL + ts.tv_nsec; |
| 121 | } else |
| 122 | #endif |
| 123 | { |
| 124 | /* XXX: using gettimeofday leads to problems if the date |
| 125 | changes, so it should be avoided. */ |
| 126 | return get_clock_realtime(); |
| 127 | } |
| 128 | } |
| 129 | #endif |
Paolo Bonzini | db1a497 | 2010-03-10 11:38:55 +0100 | [diff] [blame] | 130 | |
pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 131 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts); |
| 132 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts); |
| 133 | |
| 134 | /* ptimer.c */ |
| 135 | typedef struct ptimer_state ptimer_state; |
| 136 | typedef void (*ptimer_cb)(void *opaque); |
| 137 | |
| 138 | ptimer_state *ptimer_init(QEMUBH *bh); |
| 139 | void ptimer_set_period(ptimer_state *s, int64_t period); |
| 140 | void ptimer_set_freq(ptimer_state *s, uint32_t freq); |
| 141 | void ptimer_set_limit(ptimer_state *s, uint64_t limit, int reload); |
| 142 | uint64_t ptimer_get_count(ptimer_state *s); |
| 143 | void ptimer_set_count(ptimer_state *s, uint64_t count); |
| 144 | void ptimer_run(ptimer_state *s, int oneshot); |
| 145 | void ptimer_stop(ptimer_state *s); |
pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 146 | |
Blue Swirl | 29e922b | 2010-03-29 19:24:00 +0000 | [diff] [blame] | 147 | /* icount */ |
| 148 | int64_t qemu_icount_round(int64_t count); |
| 149 | extern int64_t qemu_icount; |
| 150 | extern int use_icount; |
| 151 | extern int icount_time_shift; |
| 152 | extern int64_t qemu_icount_bias; |
| 153 | int64_t cpu_get_icount(void); |
| 154 | |
| 155 | /*******************************************/ |
| 156 | /* host CPU ticks (if available) */ |
| 157 | |
| 158 | #if defined(_ARCH_PPC) |
| 159 | |
| 160 | static inline int64_t cpu_get_real_ticks(void) |
| 161 | { |
| 162 | int64_t retval; |
| 163 | #ifdef _ARCH_PPC64 |
| 164 | /* This reads timebase in one 64bit go and includes Cell workaround from: |
| 165 | http://ozlabs.org/pipermail/linuxppc-dev/2006-October/027052.html |
| 166 | */ |
| 167 | __asm__ __volatile__ ("mftb %0\n\t" |
| 168 | "cmpwi %0,0\n\t" |
| 169 | "beq- $-8" |
| 170 | : "=r" (retval)); |
| 171 | #else |
| 172 | /* http://ozlabs.org/pipermail/linuxppc-dev/1999-October/003889.html */ |
| 173 | unsigned long junk; |
Alexander Graf | 4a9590f | 2010-04-03 11:37:26 +0200 | [diff] [blame] | 174 | __asm__ __volatile__ ("mfspr %1,269\n\t" /* mftbu */ |
| 175 | "mfspr %L0,268\n\t" /* mftb */ |
| 176 | "mfspr %0,269\n\t" /* mftbu */ |
Blue Swirl | 29e922b | 2010-03-29 19:24:00 +0000 | [diff] [blame] | 177 | "cmpw %0,%1\n\t" |
| 178 | "bne $-16" |
| 179 | : "=r" (retval), "=r" (junk)); |
| 180 | #endif |
| 181 | return retval; |
| 182 | } |
| 183 | |
| 184 | #elif defined(__i386__) |
| 185 | |
| 186 | static inline int64_t cpu_get_real_ticks(void) |
| 187 | { |
| 188 | int64_t val; |
| 189 | asm volatile ("rdtsc" : "=A" (val)); |
| 190 | return val; |
| 191 | } |
| 192 | |
| 193 | #elif defined(__x86_64__) |
| 194 | |
| 195 | static inline int64_t cpu_get_real_ticks(void) |
| 196 | { |
| 197 | uint32_t low,high; |
| 198 | int64_t val; |
| 199 | asm volatile("rdtsc" : "=a" (low), "=d" (high)); |
| 200 | val = high; |
| 201 | val <<= 32; |
| 202 | val |= low; |
| 203 | return val; |
| 204 | } |
| 205 | |
| 206 | #elif defined(__hppa__) |
| 207 | |
| 208 | static inline int64_t cpu_get_real_ticks(void) |
| 209 | { |
| 210 | int val; |
| 211 | asm volatile ("mfctl %%cr16, %0" : "=r"(val)); |
| 212 | return val; |
| 213 | } |
| 214 | |
| 215 | #elif defined(__ia64) |
| 216 | |
| 217 | static inline int64_t cpu_get_real_ticks(void) |
| 218 | { |
| 219 | int64_t val; |
| 220 | asm volatile ("mov %0 = ar.itc" : "=r"(val) :: "memory"); |
| 221 | return val; |
| 222 | } |
| 223 | |
| 224 | #elif defined(__s390__) |
| 225 | |
| 226 | static inline int64_t cpu_get_real_ticks(void) |
| 227 | { |
| 228 | int64_t val; |
| 229 | asm volatile("stck 0(%1)" : "=m" (val) : "a" (&val) : "cc"); |
| 230 | return val; |
| 231 | } |
| 232 | |
| 233 | #elif defined(__sparc_v8plus__) || defined(__sparc_v8plusa__) || defined(__sparc_v9__) |
| 234 | |
| 235 | static inline int64_t cpu_get_real_ticks (void) |
| 236 | { |
| 237 | #if defined(_LP64) |
| 238 | uint64_t rval; |
| 239 | asm volatile("rd %%tick,%0" : "=r"(rval)); |
| 240 | return rval; |
| 241 | #else |
| 242 | union { |
| 243 | uint64_t i64; |
| 244 | struct { |
| 245 | uint32_t high; |
| 246 | uint32_t low; |
| 247 | } i32; |
| 248 | } rval; |
| 249 | asm volatile("rd %%tick,%1; srlx %1,32,%0" |
| 250 | : "=r"(rval.i32.high), "=r"(rval.i32.low)); |
| 251 | return rval.i64; |
| 252 | #endif |
| 253 | } |
| 254 | |
| 255 | #elif defined(__mips__) && \ |
| 256 | ((defined(__mips_isa_rev) && __mips_isa_rev >= 2) || defined(__linux__)) |
| 257 | /* |
| 258 | * binutils wants to use rdhwr only on mips32r2 |
| 259 | * but as linux kernel emulate it, it's fine |
| 260 | * to use it. |
| 261 | * |
| 262 | */ |
| 263 | #define MIPS_RDHWR(rd, value) { \ |
| 264 | __asm__ __volatile__ (".set push\n\t" \ |
| 265 | ".set mips32r2\n\t" \ |
| 266 | "rdhwr %0, "rd"\n\t" \ |
| 267 | ".set pop" \ |
| 268 | : "=r" (value)); \ |
| 269 | } |
| 270 | |
| 271 | static inline int64_t cpu_get_real_ticks(void) |
| 272 | { |
| 273 | /* On kernels >= 2.6.25 rdhwr <reg>, $2 and $3 are emulated */ |
| 274 | uint32_t count; |
| 275 | static uint32_t cyc_per_count = 0; |
| 276 | |
| 277 | if (!cyc_per_count) { |
| 278 | MIPS_RDHWR("$3", cyc_per_count); |
| 279 | } |
| 280 | |
| 281 | MIPS_RDHWR("$2", count); |
| 282 | return (int64_t)(count * cyc_per_count); |
| 283 | } |
| 284 | |
Richard Henderson | 14a6063 | 2010-04-12 16:19:26 -0700 | [diff] [blame] | 285 | #elif defined(__alpha__) |
| 286 | |
| 287 | static inline int64_t cpu_get_real_ticks(void) |
| 288 | { |
| 289 | uint64_t cc; |
| 290 | uint32_t cur, ofs; |
| 291 | |
| 292 | asm volatile("rpcc %0" : "=r"(cc)); |
| 293 | cur = cc; |
| 294 | ofs = cc >> 32; |
| 295 | return cur - ofs; |
| 296 | } |
| 297 | |
Blue Swirl | 29e922b | 2010-03-29 19:24:00 +0000 | [diff] [blame] | 298 | #else |
| 299 | /* The host CPU doesn't have an easily accessible cycle counter. |
| 300 | Just return a monotonically increasing value. This will be |
| 301 | totally wrong, but hopefully better than nothing. */ |
| 302 | static inline int64_t cpu_get_real_ticks (void) |
| 303 | { |
| 304 | static int64_t ticks = 0; |
| 305 | return ticks++; |
| 306 | } |
| 307 | #endif |
| 308 | |
| 309 | #ifdef NEED_CPU_H |
| 310 | /* Deterministic execution requires that IO only be performed on the last |
| 311 | instruction of a TB so that interrupts take effect immediately. */ |
| 312 | static inline int can_do_io(CPUState *env) |
| 313 | { |
| 314 | if (!use_icount) |
| 315 | return 1; |
| 316 | |
| 317 | /* If not executing code then assume we are ok. */ |
| 318 | if (!env->current_tb) |
| 319 | return 1; |
| 320 | |
| 321 | return env->can_do_io != 0; |
| 322 | } |
| 323 | #endif |
| 324 | |
Richard Henderson | 2d8ebcf | 2010-04-17 16:25:10 +0000 | [diff] [blame] | 325 | #ifdef CONFIG_PROFILER |
| 326 | static inline int64_t profile_getclock(void) |
| 327 | { |
| 328 | return cpu_get_real_ticks(); |
| 329 | } |
| 330 | |
| 331 | extern int64_t qemu_time, qemu_time_start; |
| 332 | extern int64_t tlb_flush_time; |
| 333 | extern int64_t dev_time; |
| 334 | #endif |
| 335 | |
pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 336 | #endif |