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