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87ecb68b PB |
1 | #ifndef QEMU_TIMER_H |
2 | #define QEMU_TIMER_H | |
3 | ||
29e922b6 | 4 | #include "qemu-common.h" |
c57c846a BS |
5 | #include <time.h> |
6 | #include <sys/time.h> | |
7 | ||
8 | #ifdef _WIN32 | |
9 | #include <windows.h> | |
10 | #include <mmsystem.h> | |
11 | #endif | |
29e922b6 | 12 | |
87ecb68b PB |
13 | /* timers */ |
14 | ||
0ce1b948 PB |
15 | #define SCALE_MS 1000000 |
16 | #define SCALE_US 1000 | |
17 | #define SCALE_NS 1 | |
18 | ||
87ecb68b PB |
19 | typedef struct QEMUClock QEMUClock; |
20 | typedef void QEMUTimerCB(void *opaque); | |
21 | ||
22 | /* The real time clock should be used only for stuff which does not | |
23 | change the virtual machine state, as it is run even if the virtual | |
24 | machine is stopped. The real time clock has a frequency of 1000 | |
25 | Hz. */ | |
26 | extern QEMUClock *rt_clock; | |
27 | ||
28 | /* The virtual clock is only run during the emulation. It is stopped | |
29 | when the virtual machine is stopped. Virtual timers use a high | |
30 | precision clock, usually cpu cycles (use ticks_per_sec). */ | |
31 | extern QEMUClock *vm_clock; | |
32 | ||
21d5d12b JK |
33 | /* The host clock should be use for device models that emulate accurate |
34 | real time sources. It will continue to run when the virtual machine | |
35 | is suspended, and it will reflect system time changes the host may | |
36 | undergo (e.g. due to NTP). The host clock has the same precision as | |
37 | the virtual clock. */ | |
38 | extern QEMUClock *host_clock; | |
39 | ||
41c872b6 | 40 | int64_t qemu_get_clock_ns(QEMUClock *clock); |
db1a4972 | 41 | void qemu_clock_enable(QEMUClock *clock, int enabled); |
ab33fcda | 42 | void qemu_clock_warp(QEMUClock *clock); |
87ecb68b | 43 | |
4a998740 PB |
44 | QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale, |
45 | QEMUTimerCB *cb, void *opaque); | |
87ecb68b PB |
46 | void qemu_free_timer(QEMUTimer *ts); |
47 | void qemu_del_timer(QEMUTimer *ts); | |
48 | void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time); | |
49 | int qemu_timer_pending(QEMUTimer *ts); | |
2430ffe4 | 50 | int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time); |
87ecb68b | 51 | |
db1a4972 PB |
52 | void qemu_run_all_timers(void); |
53 | int qemu_alarm_pending(void); | |
cb842c90 | 54 | int64_t qemu_next_icount_deadline(void); |
db1a4972 PB |
55 | void configure_alarms(char const *opt); |
56 | void configure_icount(const char *option); | |
57 | int qemu_calculate_timeout(void); | |
58 | void init_clocks(void); | |
59 | int init_timer_alarm(void); | |
60 | void quit_timers(void); | |
61 | ||
0ce1b948 PB |
62 | static inline QEMUTimer *qemu_new_timer_ns(QEMUClock *clock, QEMUTimerCB *cb, |
63 | void *opaque) | |
64 | { | |
4a998740 | 65 | return qemu_new_timer(clock, SCALE_NS, cb, opaque); |
0ce1b948 PB |
66 | } |
67 | ||
68 | static inline QEMUTimer *qemu_new_timer_ms(QEMUClock *clock, QEMUTimerCB *cb, | |
69 | void *opaque) | |
70 | { | |
4a998740 | 71 | return qemu_new_timer(clock, SCALE_MS, cb, opaque); |
0ce1b948 PB |
72 | } |
73 | ||
74 | static inline int64_t qemu_get_clock_ms(QEMUClock *clock) | |
75 | { | |
76 | return qemu_get_clock_ns(clock) / SCALE_MS; | |
77 | } | |
78 | ||
274dfed8 AL |
79 | static inline int64_t get_ticks_per_sec(void) |
80 | { | |
81 | return 1000000000LL; | |
82 | } | |
87ecb68b | 83 | |
c57c846a BS |
84 | /* real time host monotonic timer */ |
85 | static inline int64_t get_clock_realtime(void) | |
86 | { | |
87 | struct timeval tv; | |
88 | ||
89 | gettimeofday(&tv, NULL); | |
90 | return tv.tv_sec * 1000000000LL + (tv.tv_usec * 1000); | |
91 | } | |
92 | ||
93 | /* Warning: don't insert tracepoints into these functions, they are | |
94 | also used by simpletrace backend and tracepoints would cause | |
95 | an infinite recursion! */ | |
96 | #ifdef _WIN32 | |
97 | extern int64_t clock_freq; | |
98 | ||
99 | static inline int64_t get_clock(void) | |
100 | { | |
101 | LARGE_INTEGER ti; | |
102 | QueryPerformanceCounter(&ti); | |
103 | return muldiv64(ti.QuadPart, get_ticks_per_sec(), clock_freq); | |
104 | } | |
105 | ||
106 | #else | |
107 | ||
108 | extern int use_rt_clock; | |
109 | ||
110 | static inline int64_t get_clock(void) | |
111 | { | |
112 | #if defined(__linux__) || (defined(__FreeBSD__) && __FreeBSD_version >= 500000) \ | |
113 | || defined(__DragonFly__) || defined(__FreeBSD_kernel__) | |
114 | if (use_rt_clock) { | |
115 | struct timespec ts; | |
116 | clock_gettime(CLOCK_MONOTONIC, &ts); | |
117 | return ts.tv_sec * 1000000000LL + ts.tv_nsec; | |
118 | } else | |
119 | #endif | |
120 | { | |
121 | /* XXX: using gettimeofday leads to problems if the date | |
122 | changes, so it should be avoided. */ | |
123 | return get_clock_realtime(); | |
124 | } | |
125 | } | |
126 | #endif | |
db1a4972 | 127 | |
87ecb68b PB |
128 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts); |
129 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts); | |
130 | ||
131 | /* ptimer.c */ | |
132 | typedef struct ptimer_state ptimer_state; | |
133 | typedef void (*ptimer_cb)(void *opaque); | |
134 | ||
135 | ptimer_state *ptimer_init(QEMUBH *bh); | |
136 | void ptimer_set_period(ptimer_state *s, int64_t period); | |
137 | void ptimer_set_freq(ptimer_state *s, uint32_t freq); | |
138 | void ptimer_set_limit(ptimer_state *s, uint64_t limit, int reload); | |
139 | uint64_t ptimer_get_count(ptimer_state *s); | |
140 | void ptimer_set_count(ptimer_state *s, uint64_t count); | |
141 | void ptimer_run(ptimer_state *s, int oneshot); | |
142 | void ptimer_stop(ptimer_state *s); | |
143 | void qemu_put_ptimer(QEMUFile *f, ptimer_state *s); | |
144 | void qemu_get_ptimer(QEMUFile *f, ptimer_state *s); | |
145 | ||
29e922b6 BS |
146 | /* icount */ |
147 | int64_t qemu_icount_round(int64_t count); | |
148 | extern int64_t qemu_icount; | |
149 | extern int use_icount; | |
150 | extern int icount_time_shift; | |
151 | extern int64_t qemu_icount_bias; | |
152 | int64_t cpu_get_icount(void); | |
153 | ||
154 | /*******************************************/ | |
155 | /* host CPU ticks (if available) */ | |
156 | ||
157 | #if defined(_ARCH_PPC) | |
158 | ||
159 | static inline int64_t cpu_get_real_ticks(void) | |
160 | { | |
161 | int64_t retval; | |
162 | #ifdef _ARCH_PPC64 | |
163 | /* This reads timebase in one 64bit go and includes Cell workaround from: | |
164 | http://ozlabs.org/pipermail/linuxppc-dev/2006-October/027052.html | |
165 | */ | |
166 | __asm__ __volatile__ ("mftb %0\n\t" | |
167 | "cmpwi %0,0\n\t" | |
168 | "beq- $-8" | |
169 | : "=r" (retval)); | |
170 | #else | |
171 | /* http://ozlabs.org/pipermail/linuxppc-dev/1999-October/003889.html */ | |
172 | unsigned long junk; | |
4a9590f3 AG |
173 | __asm__ __volatile__ ("mfspr %1,269\n\t" /* mftbu */ |
174 | "mfspr %L0,268\n\t" /* mftb */ | |
175 | "mfspr %0,269\n\t" /* mftbu */ | |
29e922b6 BS |
176 | "cmpw %0,%1\n\t" |
177 | "bne $-16" | |
178 | : "=r" (retval), "=r" (junk)); | |
179 | #endif | |
180 | return retval; | |
181 | } | |
182 | ||
183 | #elif defined(__i386__) | |
184 | ||
185 | static inline int64_t cpu_get_real_ticks(void) | |
186 | { | |
187 | int64_t val; | |
188 | asm volatile ("rdtsc" : "=A" (val)); | |
189 | return val; | |
190 | } | |
191 | ||
192 | #elif defined(__x86_64__) | |
193 | ||
194 | static inline int64_t cpu_get_real_ticks(void) | |
195 | { | |
196 | uint32_t low,high; | |
197 | int64_t val; | |
198 | asm volatile("rdtsc" : "=a" (low), "=d" (high)); | |
199 | val = high; | |
200 | val <<= 32; | |
201 | val |= low; | |
202 | return val; | |
203 | } | |
204 | ||
205 | #elif defined(__hppa__) | |
206 | ||
207 | static inline int64_t cpu_get_real_ticks(void) | |
208 | { | |
209 | int val; | |
210 | asm volatile ("mfctl %%cr16, %0" : "=r"(val)); | |
211 | return val; | |
212 | } | |
213 | ||
214 | #elif defined(__ia64) | |
215 | ||
216 | static inline int64_t cpu_get_real_ticks(void) | |
217 | { | |
218 | int64_t val; | |
219 | asm volatile ("mov %0 = ar.itc" : "=r"(val) :: "memory"); | |
220 | return val; | |
221 | } | |
222 | ||
223 | #elif defined(__s390__) | |
224 | ||
225 | static inline int64_t cpu_get_real_ticks(void) | |
226 | { | |
227 | int64_t val; | |
228 | asm volatile("stck 0(%1)" : "=m" (val) : "a" (&val) : "cc"); | |
229 | return val; | |
230 | } | |
231 | ||
232 | #elif defined(__sparc_v8plus__) || defined(__sparc_v8plusa__) || defined(__sparc_v9__) | |
233 | ||
234 | static inline int64_t cpu_get_real_ticks (void) | |
235 | { | |
236 | #if defined(_LP64) | |
237 | uint64_t rval; | |
238 | asm volatile("rd %%tick,%0" : "=r"(rval)); | |
239 | return rval; | |
240 | #else | |
241 | union { | |
242 | uint64_t i64; | |
243 | struct { | |
244 | uint32_t high; | |
245 | uint32_t low; | |
246 | } i32; | |
247 | } rval; | |
248 | asm volatile("rd %%tick,%1; srlx %1,32,%0" | |
249 | : "=r"(rval.i32.high), "=r"(rval.i32.low)); | |
250 | return rval.i64; | |
251 | #endif | |
252 | } | |
253 | ||
254 | #elif defined(__mips__) && \ | |
255 | ((defined(__mips_isa_rev) && __mips_isa_rev >= 2) || defined(__linux__)) | |
256 | /* | |
257 | * binutils wants to use rdhwr only on mips32r2 | |
258 | * but as linux kernel emulate it, it's fine | |
259 | * to use it. | |
260 | * | |
261 | */ | |
262 | #define MIPS_RDHWR(rd, value) { \ | |
263 | __asm__ __volatile__ (".set push\n\t" \ | |
264 | ".set mips32r2\n\t" \ | |
265 | "rdhwr %0, "rd"\n\t" \ | |
266 | ".set pop" \ | |
267 | : "=r" (value)); \ | |
268 | } | |
269 | ||
270 | static inline int64_t cpu_get_real_ticks(void) | |
271 | { | |
272 | /* On kernels >= 2.6.25 rdhwr <reg>, $2 and $3 are emulated */ | |
273 | uint32_t count; | |
274 | static uint32_t cyc_per_count = 0; | |
275 | ||
276 | if (!cyc_per_count) { | |
277 | MIPS_RDHWR("$3", cyc_per_count); | |
278 | } | |
279 | ||
280 | MIPS_RDHWR("$2", count); | |
281 | return (int64_t)(count * cyc_per_count); | |
282 | } | |
283 | ||
14a6063a RH |
284 | #elif defined(__alpha__) |
285 | ||
286 | static inline int64_t cpu_get_real_ticks(void) | |
287 | { | |
288 | uint64_t cc; | |
289 | uint32_t cur, ofs; | |
290 | ||
291 | asm volatile("rpcc %0" : "=r"(cc)); | |
292 | cur = cc; | |
293 | ofs = cc >> 32; | |
294 | return cur - ofs; | |
295 | } | |
296 | ||
29e922b6 BS |
297 | #else |
298 | /* The host CPU doesn't have an easily accessible cycle counter. | |
299 | Just return a monotonically increasing value. This will be | |
300 | totally wrong, but hopefully better than nothing. */ | |
301 | static inline int64_t cpu_get_real_ticks (void) | |
302 | { | |
303 | static int64_t ticks = 0; | |
304 | return ticks++; | |
305 | } | |
306 | #endif | |
307 | ||
308 | #ifdef NEED_CPU_H | |
309 | /* Deterministic execution requires that IO only be performed on the last | |
310 | instruction of a TB so that interrupts take effect immediately. */ | |
311 | static inline int can_do_io(CPUState *env) | |
312 | { | |
313 | if (!use_icount) | |
314 | return 1; | |
315 | ||
316 | /* If not executing code then assume we are ok. */ | |
317 | if (!env->current_tb) | |
318 | return 1; | |
319 | ||
320 | return env->can_do_io != 0; | |
321 | } | |
322 | #endif | |
323 | ||
2d8ebcf9 RH |
324 | #ifdef CONFIG_PROFILER |
325 | static inline int64_t profile_getclock(void) | |
326 | { | |
327 | return cpu_get_real_ticks(); | |
328 | } | |
329 | ||
330 | extern int64_t qemu_time, qemu_time_start; | |
331 | extern int64_t tlb_flush_time; | |
332 | extern int64_t dev_time; | |
333 | #endif | |
334 | ||
87ecb68b | 335 | #endif |