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