The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 1 | #ifndef QEMU_TIMER_H |
| 2 | #define QEMU_TIMER_H |
| 3 | |
David Turner | 6a9ef17 | 2010-09-09 22:54:36 +0200 | [diff] [blame] | 4 | #include "qemu-common.h" |
| 5 | |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 6 | /* timers */ |
| 7 | |
| 8 | typedef struct QEMUClock QEMUClock; |
| 9 | typedef void QEMUTimerCB(void *opaque); |
| 10 | |
| 11 | /* The real time clock should be used only for stuff which does not |
| 12 | change the virtual machine state, as it is run even if the virtual |
| 13 | machine is stopped. The real time clock has a frequency of 1000 |
| 14 | Hz. */ |
| 15 | extern QEMUClock *rt_clock; |
| 16 | |
| 17 | /* The virtual clock is only run during the emulation. It is stopped |
| 18 | when the virtual machine is stopped. Virtual timers use a high |
| 19 | precision clock, usually cpu cycles (use ticks_per_sec). */ |
| 20 | extern QEMUClock *vm_clock; |
| 21 | |
David 'Digit' Turner | a7fb77d | 2010-05-10 23:50:54 -0700 | [diff] [blame] | 22 | /* The host clock should be use for device models that emulate accurate |
| 23 | real time sources. It will continue to run when the virtual machine |
| 24 | is suspended, and it will reflect system time changes the host may |
| 25 | undergo (e.g. due to NTP). The host clock has the same precision as |
| 26 | the virtual clock. */ |
| 27 | extern QEMUClock *host_clock; |
| 28 | |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 29 | int64_t qemu_get_clock(QEMUClock *clock); |
David 'Digit' Turner | a7fb77d | 2010-05-10 23:50:54 -0700 | [diff] [blame] | 30 | int64_t qemu_get_clock_ns(QEMUClock *clock); |
David Turner | 6a9ef17 | 2010-09-09 22:54:36 +0200 | [diff] [blame] | 31 | void qemu_clock_enable(QEMUClock *clock, int enabled); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 32 | |
| 33 | QEMUTimer *qemu_new_timer(QEMUClock *clock, QEMUTimerCB *cb, void *opaque); |
| 34 | void qemu_free_timer(QEMUTimer *ts); |
| 35 | void qemu_del_timer(QEMUTimer *ts); |
| 36 | void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time); |
| 37 | int qemu_timer_pending(QEMUTimer *ts); |
David 'Digit' Turner | a7fb77d | 2010-05-10 23:50:54 -0700 | [diff] [blame] | 38 | int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time); |
David 'Digit' Turner | 6b51281 | 2010-10-15 15:05:04 +0200 | [diff] [blame] | 39 | int qemu_timer_alarm_pending(void); |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 40 | |
David Turner | 6a9ef17 | 2010-09-09 22:54:36 +0200 | [diff] [blame] | 41 | void qemu_run_all_timers(void); |
| 42 | int qemu_alarm_pending(void); |
| 43 | int64_t qemu_next_deadline(void); |
| 44 | void configure_alarms(char const *opt); |
| 45 | void configure_icount(const char *option); |
| 46 | int qemu_calculate_timeout(void); |
| 47 | void init_clocks(void); |
| 48 | int init_timer_alarm(void); |
| 49 | void quit_timers(void); |
| 50 | |
David 'Digit' Turner | a7fb77d | 2010-05-10 23:50:54 -0700 | [diff] [blame] | 51 | static inline int64_t get_ticks_per_sec(void) |
| 52 | { |
| 53 | return 1000000000LL; |
| 54 | } |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 55 | |
David Turner | 6a9ef17 | 2010-09-09 22:54:36 +0200 | [diff] [blame] | 56 | |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 57 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts); |
| 58 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts); |
| 59 | |
| 60 | /* ptimer.c */ |
| 61 | typedef struct ptimer_state ptimer_state; |
| 62 | typedef void (*ptimer_cb)(void *opaque); |
| 63 | |
| 64 | ptimer_state *ptimer_init(QEMUBH *bh); |
| 65 | void ptimer_set_period(ptimer_state *s, int64_t period); |
| 66 | void ptimer_set_freq(ptimer_state *s, uint32_t freq); |
| 67 | void ptimer_set_limit(ptimer_state *s, uint64_t limit, int reload); |
| 68 | uint64_t ptimer_get_count(ptimer_state *s); |
| 69 | void ptimer_set_count(ptimer_state *s, uint64_t count); |
| 70 | void ptimer_run(ptimer_state *s, int oneshot); |
| 71 | void ptimer_stop(ptimer_state *s); |
| 72 | void qemu_put_ptimer(QEMUFile *f, ptimer_state *s); |
| 73 | void qemu_get_ptimer(QEMUFile *f, ptimer_state *s); |
| 74 | |
David Turner | 6a9ef17 | 2010-09-09 22:54:36 +0200 | [diff] [blame] | 75 | /* icount */ |
| 76 | int64_t qemu_icount_round(int64_t count); |
| 77 | extern int64_t qemu_icount; |
| 78 | extern int use_icount; |
| 79 | extern int icount_time_shift; |
| 80 | extern int64_t qemu_icount_bias; |
| 81 | int64_t cpu_get_icount(void); |
| 82 | |
| 83 | /*******************************************/ |
| 84 | /* host CPU ticks (if available) */ |
| 85 | |
| 86 | #if defined(_ARCH_PPC) |
| 87 | |
| 88 | static inline int64_t cpu_get_real_ticks(void) |
| 89 | { |
| 90 | int64_t retval; |
| 91 | #ifdef _ARCH_PPC64 |
| 92 | /* This reads timebase in one 64bit go and includes Cell workaround from: |
| 93 | http://ozlabs.org/pipermail/linuxppc-dev/2006-October/027052.html |
| 94 | */ |
| 95 | __asm__ __volatile__ ("mftb %0\n\t" |
| 96 | "cmpwi %0,0\n\t" |
| 97 | "beq- $-8" |
| 98 | : "=r" (retval)); |
| 99 | #else |
| 100 | /* http://ozlabs.org/pipermail/linuxppc-dev/1999-October/003889.html */ |
| 101 | unsigned long junk; |
| 102 | __asm__ __volatile__ ("mfspr %1,269\n\t" /* mftbu */ |
| 103 | "mfspr %L0,268\n\t" /* mftb */ |
| 104 | "mfspr %0,269\n\t" /* mftbu */ |
| 105 | "cmpw %0,%1\n\t" |
| 106 | "bne $-16" |
| 107 | : "=r" (retval), "=r" (junk)); |
| 108 | #endif |
| 109 | return retval; |
| 110 | } |
| 111 | |
| 112 | #elif defined(__i386__) |
| 113 | |
| 114 | static inline int64_t cpu_get_real_ticks(void) |
| 115 | { |
| 116 | int64_t val; |
| 117 | asm volatile ("rdtsc" : "=A" (val)); |
| 118 | return val; |
| 119 | } |
| 120 | |
| 121 | #elif defined(__x86_64__) |
| 122 | |
| 123 | static inline int64_t cpu_get_real_ticks(void) |
| 124 | { |
| 125 | uint32_t low,high; |
| 126 | int64_t val; |
| 127 | asm volatile("rdtsc" : "=a" (low), "=d" (high)); |
| 128 | val = high; |
| 129 | val <<= 32; |
| 130 | val |= low; |
| 131 | return val; |
| 132 | } |
| 133 | |
| 134 | #elif defined(__hppa__) |
| 135 | |
| 136 | static inline int64_t cpu_get_real_ticks(void) |
| 137 | { |
| 138 | int val; |
| 139 | asm volatile ("mfctl %%cr16, %0" : "=r"(val)); |
| 140 | return val; |
| 141 | } |
| 142 | |
| 143 | #elif defined(__ia64) |
| 144 | |
| 145 | static inline int64_t cpu_get_real_ticks(void) |
| 146 | { |
| 147 | int64_t val; |
| 148 | asm volatile ("mov %0 = ar.itc" : "=r"(val) :: "memory"); |
| 149 | return val; |
| 150 | } |
| 151 | |
| 152 | #elif defined(__s390__) |
| 153 | |
| 154 | static inline int64_t cpu_get_real_ticks(void) |
| 155 | { |
| 156 | int64_t val; |
| 157 | asm volatile("stck 0(%1)" : "=m" (val) : "a" (&val) : "cc"); |
| 158 | return val; |
| 159 | } |
| 160 | |
| 161 | #elif defined(__sparc_v8plus__) || defined(__sparc_v8plusa__) || defined(__sparc_v9__) |
| 162 | |
| 163 | static inline int64_t cpu_get_real_ticks (void) |
| 164 | { |
| 165 | #if defined(_LP64) |
| 166 | uint64_t rval; |
| 167 | asm volatile("rd %%tick,%0" : "=r"(rval)); |
| 168 | return rval; |
| 169 | #else |
| 170 | union { |
| 171 | uint64_t i64; |
| 172 | struct { |
| 173 | uint32_t high; |
| 174 | uint32_t low; |
| 175 | } i32; |
| 176 | } rval; |
| 177 | asm volatile("rd %%tick,%1; srlx %1,32,%0" |
| 178 | : "=r"(rval.i32.high), "=r"(rval.i32.low)); |
| 179 | return rval.i64; |
| 180 | #endif |
| 181 | } |
| 182 | |
| 183 | #elif defined(__mips__) && \ |
| 184 | ((defined(__mips_isa_rev) && __mips_isa_rev >= 2) || defined(__linux__)) |
| 185 | /* |
| 186 | * binutils wants to use rdhwr only on mips32r2 |
| 187 | * but as linux kernel emulate it, it's fine |
| 188 | * to use it. |
| 189 | * |
| 190 | */ |
| 191 | #define MIPS_RDHWR(rd, value) { \ |
| 192 | __asm__ __volatile__ (".set push\n\t" \ |
| 193 | ".set mips32r2\n\t" \ |
| 194 | "rdhwr %0, "rd"\n\t" \ |
| 195 | ".set pop" \ |
| 196 | : "=r" (value)); \ |
| 197 | } |
| 198 | |
| 199 | static inline int64_t cpu_get_real_ticks(void) |
| 200 | { |
| 201 | /* On kernels >= 2.6.25 rdhwr <reg>, $2 and $3 are emulated */ |
| 202 | uint32_t count; |
| 203 | static uint32_t cyc_per_count = 0; |
| 204 | |
| 205 | if (!cyc_per_count) { |
| 206 | MIPS_RDHWR("$3", cyc_per_count); |
| 207 | } |
| 208 | |
| 209 | MIPS_RDHWR("$2", count); |
| 210 | return (int64_t)(count * cyc_per_count); |
| 211 | } |
| 212 | |
| 213 | #elif defined(__alpha__) |
| 214 | |
| 215 | static inline int64_t cpu_get_real_ticks(void) |
| 216 | { |
| 217 | uint64_t cc; |
| 218 | uint32_t cur, ofs; |
| 219 | |
| 220 | asm volatile("rpcc %0" : "=r"(cc)); |
| 221 | cur = cc; |
| 222 | ofs = cc >> 32; |
| 223 | return cur - ofs; |
| 224 | } |
| 225 | |
| 226 | #else |
| 227 | /* The host CPU doesn't have an easily accessible cycle counter. |
| 228 | Just return a monotonically increasing value. This will be |
| 229 | totally wrong, but hopefully better than nothing. */ |
| 230 | static inline int64_t cpu_get_real_ticks (void) |
| 231 | { |
| 232 | static int64_t ticks = 0; |
| 233 | return ticks++; |
| 234 | } |
| 235 | #endif |
| 236 | |
| 237 | #ifdef NEED_CPU_H |
| 238 | /* Deterministic execution requires that IO only be performed on the last |
| 239 | instruction of a TB so that interrupts take effect immediately. */ |
| 240 | static inline int can_do_io(CPUState *env) |
| 241 | { |
| 242 | if (!use_icount) |
| 243 | return 1; |
| 244 | |
| 245 | /* If not executing code then assume we are ok. */ |
| 246 | if (!env->current_tb) |
| 247 | return 1; |
| 248 | |
| 249 | return env->can_do_io != 0; |
| 250 | } |
| 251 | #endif |
| 252 | |
| 253 | #ifdef CONFIG_PROFILER |
| 254 | static inline int64_t profile_getclock(void) |
| 255 | { |
| 256 | return cpu_get_real_ticks(); |
| 257 | } |
| 258 | |
| 259 | extern int64_t qemu_time, qemu_time_start; |
| 260 | extern int64_t tlb_flush_time; |
| 261 | extern int64_t dev_time; |
| 262 | #endif |
| 263 | |
The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 264 | #endif |