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Diffstat (limited to 'qemu/include/qemu/timer.h')
| -rw-r--r-- | qemu/include/qemu/timer.h | 1014 |
1 files changed, 0 insertions, 1014 deletions
diff --git a/qemu/include/qemu/timer.h b/qemu/include/qemu/timer.h deleted file mode 100644 index 471969a24..000000000 --- a/qemu/include/qemu/timer.h +++ /dev/null @@ -1,1014 +0,0 @@ -#ifndef QEMU_TIMER_H -#define QEMU_TIMER_H - -#include "qemu-common.h" -#include "qemu/notify.h" -#include "qemu/host-utils.h" - -#define NANOSECONDS_PER_SECOND 1000000000LL - -/* timers */ - -#define SCALE_MS 1000000 -#define SCALE_US 1000 -#define SCALE_NS 1 - -/** - * QEMUClockType: - * - * The following clock types are available: - * - * @QEMU_CLOCK_REALTIME: Real time clock - * - * The real time clock should be used only for stuff which does not - * change the virtual machine state, as it is run even if the virtual - * machine is stopped. The real time clock has a frequency of 1000 - * Hz. - * - * @QEMU_CLOCK_VIRTUAL: virtual clock - * - * The virtual clock is only run during the emulation. It is stopped - * when the virtual machine is stopped. Virtual timers use a high - * precision clock, usually cpu cycles (use ticks_per_sec). - * - * @QEMU_CLOCK_HOST: host clock - * - * The host clock should be use for device models that emulate accurate - * real time sources. It will continue to run when the virtual machine - * is suspended, and it will reflect system time changes the host may - * undergo (e.g. due to NTP). The host clock has the same precision as - * the virtual clock. - * - * @QEMU_CLOCK_VIRTUAL_RT: realtime clock used for icount warp - * - * Outside icount mode, this clock is the same as @QEMU_CLOCK_VIRTUAL. - * In icount mode, this clock counts nanoseconds while the virtual - * machine is running. It is used to increase @QEMU_CLOCK_VIRTUAL - * while the CPUs are sleeping and thus not executing instructions. - */ - -typedef enum { - QEMU_CLOCK_REALTIME = 0, - QEMU_CLOCK_VIRTUAL = 1, - QEMU_CLOCK_HOST = 2, - QEMU_CLOCK_VIRTUAL_RT = 3, - QEMU_CLOCK_MAX -} QEMUClockType; - -typedef struct QEMUTimerList QEMUTimerList; - -struct QEMUTimerListGroup { - QEMUTimerList *tl[QEMU_CLOCK_MAX]; -}; - -typedef void QEMUTimerCB(void *opaque); -typedef void QEMUTimerListNotifyCB(void *opaque); - -struct QEMUTimer { - int64_t expire_time; /* in nanoseconds */ - QEMUTimerList *timer_list; - QEMUTimerCB *cb; - void *opaque; - QEMUTimer *next; - int scale; -}; - -extern QEMUTimerListGroup main_loop_tlg; - -/* - * QEMUClockType - */ - -/* - * qemu_clock_get_ns; - * @type: the clock type - * - * Get the nanosecond value of a clock with - * type @type - * - * Returns: the clock value in nanoseconds - */ -int64_t qemu_clock_get_ns(QEMUClockType type); - -/** - * qemu_clock_get_ms; - * @type: the clock type - * - * Get the millisecond value of a clock with - * type @type - * - * Returns: the clock value in milliseconds - */ -static inline int64_t qemu_clock_get_ms(QEMUClockType type) -{ - return qemu_clock_get_ns(type) / SCALE_MS; -} - -/** - * qemu_clock_get_us; - * @type: the clock type - * - * Get the microsecond value of a clock with - * type @type - * - * Returns: the clock value in microseconds - */ -static inline int64_t qemu_clock_get_us(QEMUClockType type) -{ - return qemu_clock_get_ns(type) / SCALE_US; -} - -/** - * qemu_clock_has_timers: - * @type: the clock type - * - * Determines whether a clock's default timer list - * has timers attached - * - * Note that this function should not be used when other threads also access - * the timer list. The return value may be outdated by the time it is acted - * upon. - * - * Returns: true if the clock's default timer list - * has timers attached - */ -bool qemu_clock_has_timers(QEMUClockType type); - -/** - * qemu_clock_expired: - * @type: the clock type - * - * Determines whether a clock's default timer list - * has an expired clock. - * - * Returns: true if the clock's default timer list has - * an expired timer - */ -bool qemu_clock_expired(QEMUClockType type); - -/** - * qemu_clock_use_for_deadline: - * @type: the clock type - * - * Determine whether a clock should be used for deadline - * calculations. Some clocks, for instance vm_clock with - * use_icount set, do not count in nanoseconds. Such clocks - * are not used for deadline calculations, and are presumed - * to interrupt any poll using qemu_notify/aio_notify - * etc. - * - * Returns: true if the clock runs in nanoseconds and - * should be used for a deadline. - */ -bool qemu_clock_use_for_deadline(QEMUClockType type); - -/** - * qemu_clock_deadline_ns_all: - * @type: the clock type - * - * Calculate the deadline across all timer lists associated - * with a clock (as opposed to just the default one) - * in nanoseconds, or -1 if no timer is set to expire. - * - * Returns: time until expiry in nanoseconds or -1 - */ -int64_t qemu_clock_deadline_ns_all(QEMUClockType type); - -/** - * qemu_clock_get_main_loop_timerlist: - * @type: the clock type - * - * Return the default timer list assocatiated with a clock. - * - * Returns: the default timer list - */ -QEMUTimerList *qemu_clock_get_main_loop_timerlist(QEMUClockType type); - -/** - * qemu_clock_nofify: - * @type: the clock type - * - * Call the notifier callback connected with the default timer - * list linked to the clock, or qemu_notify() if none. - */ -void qemu_clock_notify(QEMUClockType type); - -/** - * qemu_clock_enable: - * @type: the clock type - * @enabled: true to enable, false to disable - * - * Enable or disable a clock - * Disabling the clock will wait for related timerlists to stop - * executing qemu_run_timers. Thus, this functions should not - * be used from the callback of a timer that is based on @clock. - * Doing so would cause a deadlock. - * - * Caller should hold BQL. - */ -void qemu_clock_enable(QEMUClockType type, bool enabled); - -/** - * qemu_start_warp_timer: - * - * Starts a timer for virtual clock update - */ -void qemu_start_warp_timer(void); - -/** - * qemu_clock_register_reset_notifier: - * @type: the clock type - * @notifier: the notifier function - * - * Register a notifier function to call when the clock - * concerned is reset. - */ -void qemu_clock_register_reset_notifier(QEMUClockType type, - Notifier *notifier); - -/** - * qemu_clock_unregister_reset_notifier: - * @type: the clock type - * @notifier: the notifier function - * - * Unregister a notifier function to call when the clock - * concerned is reset. - */ -void qemu_clock_unregister_reset_notifier(QEMUClockType type, - Notifier *notifier); - -/** - * qemu_clock_run_timers: - * @type: clock on which to operate - * - * Run all the timers associated with the default timer list - * of a clock. - * - * Returns: true if any timer ran. - */ -bool qemu_clock_run_timers(QEMUClockType type); - -/** - * qemu_clock_run_all_timers: - * - * Run all the timers associated with the default timer list - * of every clock. - * - * Returns: true if any timer ran. - */ -bool qemu_clock_run_all_timers(void); - -/* - * QEMUTimerList - */ - -/** - * timerlist_new: - * @type: the clock type to associate with the timerlist - * @cb: the callback to call on notification - * @opaque: the opaque pointer to pass to the callback - * - * Create a new timerlist associated with the clock of - * type @type. - * - * Returns: a pointer to the QEMUTimerList created - */ -QEMUTimerList *timerlist_new(QEMUClockType type, - QEMUTimerListNotifyCB *cb, void *opaque); - -/** - * timerlist_free: - * @timer_list: the timer list to free - * - * Frees a timer_list. It must have no active timers. - */ -void timerlist_free(QEMUTimerList *timer_list); - -/** - * timerlist_has_timers: - * @timer_list: the timer list to operate on - * - * Determine whether a timer list has active timers - * - * Note that this function should not be used when other threads also access - * the timer list. The return value may be outdated by the time it is acted - * upon. - * - * Returns: true if the timer list has timers. - */ -bool timerlist_has_timers(QEMUTimerList *timer_list); - -/** - * timerlist_expired: - * @timer_list: the timer list to operate on - * - * Determine whether a timer list has any timers which - * are expired. - * - * Returns: true if the timer list has timers which - * have expired. - */ -bool timerlist_expired(QEMUTimerList *timer_list); - -/** - * timerlist_deadline_ns: - * @timer_list: the timer list to operate on - * - * Determine the deadline for a timer_list, i.e. - * the number of nanoseconds until the first timer - * expires. Return -1 if there are no timers. - * - * Returns: the number of nanoseconds until the earliest - * timer expires -1 if none - */ -int64_t timerlist_deadline_ns(QEMUTimerList *timer_list); - -/** - * timerlist_get_clock: - * @timer_list: the timer list to operate on - * - * Determine the clock type associated with a timer list. - * - * Returns: the clock type associated with the - * timer list. - */ -QEMUClockType timerlist_get_clock(QEMUTimerList *timer_list); - -/** - * timerlist_run_timers: - * @timer_list: the timer list to use - * - * Call all expired timers associated with the timer list. - * - * Returns: true if any timer expired - */ -bool timerlist_run_timers(QEMUTimerList *timer_list); - -/** - * timerlist_notify: - * @timer_list: the timer list to use - * - * call the notifier callback associated with the timer list. - */ -void timerlist_notify(QEMUTimerList *timer_list); - -/* - * QEMUTimerListGroup - */ - -/** - * timerlistgroup_init: - * @tlg: the timer list group - * @cb: the callback to call when a notify is required - * @opaque: the opaque pointer to be passed to the callback. - * - * Initialise a timer list group. This must already be - * allocated in memory and zeroed. The notifier callback is - * called whenever a clock in the timer list group is - * reenabled or whenever a timer associated with any timer - * list is modified. If @cb is specified as null, qemu_notify() - * is used instead. - */ -void timerlistgroup_init(QEMUTimerListGroup *tlg, - QEMUTimerListNotifyCB *cb, void *opaque); - -/** - * timerlistgroup_deinit: - * @tlg: the timer list group - * - * Deinitialise a timer list group. This must already be - * initialised. Note the memory is not freed. - */ -void timerlistgroup_deinit(QEMUTimerListGroup *tlg); - -/** - * timerlistgroup_run_timers: - * @tlg: the timer list group - * - * Run the timers associated with a timer list group. - * This will run timers on multiple clocks. - * - * Returns: true if any timer callback ran - */ -bool timerlistgroup_run_timers(QEMUTimerListGroup *tlg); - -/** - * timerlistgroup_deadline_ns: - * @tlg: the timer list group - * - * Determine the deadline of the soonest timer to - * expire associated with any timer list linked to - * the timer list group. Only clocks suitable for - * deadline calculation are included. - * - * Returns: the deadline in nanoseconds or -1 if no - * timers are to expire. - */ -int64_t timerlistgroup_deadline_ns(QEMUTimerListGroup *tlg); - -/* - * QEMUTimer - */ - -/** - * timer_init_tl: - * @ts: the timer to be initialised - * @timer_list: the timer list to attach the timer to - * @scale: the scale value for the timer - * @cb: the callback to be called when the timer expires - * @opaque: the opaque pointer to be passed to the callback - * - * Initialise a new timer and associate it with @timer_list. - * The caller is responsible for allocating the memory. - * - * You need not call an explicit deinit call. Simply make - * sure it is not on a list with timer_del. - */ -void timer_init_tl(QEMUTimer *ts, - QEMUTimerList *timer_list, int scale, - QEMUTimerCB *cb, void *opaque); - -/** - * timer_init: - * @type: the clock to associate with the timer - * @scale: the scale value for the timer - * @cb: the callback to call when the timer expires - * @opaque: the opaque pointer to pass to the callback - * - * Initialize a timer with the given scale on the default timer list - * associated with the clock. - * - * You need not call an explicit deinit call. Simply make - * sure it is not on a list with timer_del. - */ -static inline void timer_init(QEMUTimer *ts, QEMUClockType type, int scale, - QEMUTimerCB *cb, void *opaque) -{ - timer_init_tl(ts, main_loop_tlg.tl[type], scale, cb, opaque); -} - -/** - * timer_init_ns: - * @type: the clock to associate with the timer - * @cb: the callback to call when the timer expires - * @opaque: the opaque pointer to pass to the callback - * - * Initialize a timer with nanosecond scale on the default timer list - * associated with the clock. - * - * You need not call an explicit deinit call. Simply make - * sure it is not on a list with timer_del. - */ -static inline void timer_init_ns(QEMUTimer *ts, QEMUClockType type, - QEMUTimerCB *cb, void *opaque) -{ - timer_init(ts, type, SCALE_NS, cb, opaque); -} - -/** - * timer_init_us: - * @type: the clock to associate with the timer - * @cb: the callback to call when the timer expires - * @opaque: the opaque pointer to pass to the callback - * - * Initialize a timer with microsecond scale on the default timer list - * associated with the clock. - * - * You need not call an explicit deinit call. Simply make - * sure it is not on a list with timer_del. - */ -static inline void timer_init_us(QEMUTimer *ts, QEMUClockType type, - QEMUTimerCB *cb, void *opaque) -{ - timer_init(ts, type, SCALE_US, cb, opaque); -} - -/** - * timer_init_ms: - * @type: the clock to associate with the timer - * @cb: the callback to call when the timer expires - * @opaque: the opaque pointer to pass to the callback - * - * Initialize a timer with millisecond scale on the default timer list - * associated with the clock. - * - * You need not call an explicit deinit call. Simply make - * sure it is not on a list with timer_del. - */ -static inline void timer_init_ms(QEMUTimer *ts, QEMUClockType type, - QEMUTimerCB *cb, void *opaque) -{ - timer_init(ts, type, SCALE_MS, cb, opaque); -} - -/** - * timer_new_tl: - * @timer_list: the timer list to attach the timer to - * @scale: the scale value for the timer - * @cb: the callback to be called when the timer expires - * @opaque: the opaque pointer to be passed to the callback - * - * Creeate a new timer and associate it with @timer_list. - * The memory is allocated by the function. - * - * This is not the preferred interface unless you know you - * are going to call timer_free. Use timer_init instead. - * - * Returns: a pointer to the timer - */ -static inline QEMUTimer *timer_new_tl(QEMUTimerList *timer_list, - int scale, - QEMUTimerCB *cb, - void *opaque) -{ - QEMUTimer *ts = g_malloc0(sizeof(QEMUTimer)); - timer_init_tl(ts, timer_list, scale, cb, opaque); - return ts; -} - -/** - * timer_new: - * @type: the clock type to use - * @scale: the scale value for the timer - * @cb: the callback to be called when the timer expires - * @opaque: the opaque pointer to be passed to the callback - * - * Creeate a new timer and associate it with the default - * timer list for the clock type @type. - * - * Returns: a pointer to the timer - */ -static inline QEMUTimer *timer_new(QEMUClockType type, int scale, - QEMUTimerCB *cb, void *opaque) -{ - return timer_new_tl(main_loop_tlg.tl[type], scale, cb, opaque); -} - -/** - * timer_new_ns: - * @clock: the clock to associate with the timer - * @callback: the callback to call when the timer expires - * @opaque: the opaque pointer to pass to the callback - * - * Create a new timer with nanosecond scale on the default timer list - * associated with the clock. - * - * Returns: a pointer to the newly created timer - */ -static inline QEMUTimer *timer_new_ns(QEMUClockType type, QEMUTimerCB *cb, - void *opaque) -{ - return timer_new(type, SCALE_NS, cb, opaque); -} - -/** - * timer_new_us: - * @clock: the clock to associate with the timer - * @callback: the callback to call when the timer expires - * @opaque: the opaque pointer to pass to the callback - * - * Create a new timer with microsecond scale on the default timer list - * associated with the clock. - * - * Returns: a pointer to the newly created timer - */ -static inline QEMUTimer *timer_new_us(QEMUClockType type, QEMUTimerCB *cb, - void *opaque) -{ - return timer_new(type, SCALE_US, cb, opaque); -} - -/** - * timer_new_ms: - * @clock: the clock to associate with the timer - * @callback: the callback to call when the timer expires - * @opaque: the opaque pointer to pass to the callback - * - * Create a new timer with millisecond scale on the default timer list - * associated with the clock. - * - * Returns: a pointer to the newly created timer - */ -static inline QEMUTimer *timer_new_ms(QEMUClockType type, QEMUTimerCB *cb, - void *opaque) -{ - return timer_new(type, SCALE_MS, cb, opaque); -} - -/** - * timer_deinit: - * @ts: the timer to be de-initialised - * - * Deassociate the timer from any timerlist. You should - * call timer_del before. After this call, any further - * timer_del call cannot cause dangling pointer accesses - * even if the previously used timerlist is freed. - */ -void timer_deinit(QEMUTimer *ts); - -/** - * timer_free: - * @ts: the timer - * - * Free a timer (it must not be on the active list) - */ -void timer_free(QEMUTimer *ts); - -/** - * timer_del: - * @ts: the timer - * - * Delete a timer from the active list. - * - * This function is thread-safe but the timer and its timer list must not be - * freed while this function is running. - */ -void timer_del(QEMUTimer *ts); - -/** - * timer_mod_ns: - * @ts: the timer - * @expire_time: the expiry time in nanoseconds - * - * Modify a timer to expire at @expire_time - * - * This function is thread-safe but the timer and its timer list must not be - * freed while this function is running. - */ -void timer_mod_ns(QEMUTimer *ts, int64_t expire_time); - -/** - * timer_mod_anticipate_ns: - * @ts: the timer - * @expire_time: the expiry time in nanoseconds - * - * Modify a timer to expire at @expire_time or the current time, - * whichever comes earlier. - * - * This function is thread-safe but the timer and its timer list must not be - * freed while this function is running. - */ -void timer_mod_anticipate_ns(QEMUTimer *ts, int64_t expire_time); - -/** - * timer_mod: - * @ts: the timer - * @expire_time: the expire time in the units associated with the timer - * - * Modify a timer to expiry at @expire_time, taking into - * account the scale associated with the timer. - * - * This function is thread-safe but the timer and its timer list must not be - * freed while this function is running. - */ -void timer_mod(QEMUTimer *ts, int64_t expire_timer); - -/** - * timer_mod_anticipate: - * @ts: the timer - * @expire_time: the expiry time in nanoseconds - * - * Modify a timer to expire at @expire_time or the current time, whichever - * comes earlier, taking into account the scale associated with the timer. - * - * This function is thread-safe but the timer and its timer list must not be - * freed while this function is running. - */ -void timer_mod_anticipate(QEMUTimer *ts, int64_t expire_time); - -/** - * timer_pending: - * @ts: the timer - * - * Determines whether a timer is pending (i.e. is on the - * active list of timers, whether or not it has not yet expired). - * - * Returns: true if the timer is pending - */ -bool timer_pending(QEMUTimer *ts); - -/** - * timer_expired: - * @ts: the timer - * - * Determines whether a timer has expired. - * - * Returns: true if the timer has expired - */ -bool timer_expired(QEMUTimer *timer_head, int64_t current_time); - -/** - * timer_expire_time_ns: - * @ts: the timer - * - * Determine the expiry time of a timer - * - * Returns: the expiry time in nanoseconds - */ -uint64_t timer_expire_time_ns(QEMUTimer *ts); - -/** - * timer_get: - * @f: the file - * @ts: the timer - * - * Read a timer @ts from a file @f - */ -void timer_get(QEMUFile *f, QEMUTimer *ts); - -/** - * timer_put: - * @f: the file - * @ts: the timer - */ -void timer_put(QEMUFile *f, QEMUTimer *ts); - -/* - * General utility functions - */ - -/** - * qemu_timeout_ns_to_ms: - * @ns: nanosecond timeout value - * - * Convert a nanosecond timeout value (or -1) to - * a millisecond value (or -1), always rounding up. - * - * Returns: millisecond timeout value - */ -int qemu_timeout_ns_to_ms(int64_t ns); - -/** - * qemu_poll_ns: - * @fds: Array of file descriptors - * @nfds: number of file descriptors - * @timeout: timeout in nanoseconds - * - * Perform a poll like g_poll but with a timeout in nanoseconds. - * See g_poll documentation for further details. - * - * Returns: number of fds ready - */ -int qemu_poll_ns(GPollFD *fds, guint nfds, int64_t timeout); - -/** - * qemu_soonest_timeout: - * @timeout1: first timeout in nanoseconds (or -1 for infinite) - * @timeout2: second timeout in nanoseconds (or -1 for infinite) - * - * Calculates the soonest of two timeout values. -1 means infinite, which - * is later than any other value. - * - * Returns: soonest timeout value in nanoseconds (or -1 for infinite) - */ -static inline int64_t qemu_soonest_timeout(int64_t timeout1, int64_t timeout2) -{ - /* we can abuse the fact that -1 (which means infinite) is a maximal - * value when cast to unsigned. As this is disgusting, it's kept in - * one inline function. - */ - return ((uint64_t) timeout1 < (uint64_t) timeout2) ? timeout1 : timeout2; -} - -/** - * initclocks: - * - * Initialise the clock & timer infrastructure - */ -void init_clocks(void); - -int64_t cpu_get_ticks(void); -/* Caller must hold BQL */ -void cpu_enable_ticks(void); -/* Caller must hold BQL */ -void cpu_disable_ticks(void); - -static inline int64_t get_max_clock_jump(void) -{ - /* This should be small enough to prevent excessive interrupts from being - * generated by the RTC on clock jumps, but large enough to avoid frequent - * unnecessary resets in idle VMs. - */ - return 60 * NANOSECONDS_PER_SECOND; -} - -/* - * Low level clock functions - */ - -/* real time host monotonic timer */ -static inline int64_t get_clock_realtime(void) -{ - struct timeval tv; - - gettimeofday(&tv, NULL); - return tv.tv_sec * 1000000000LL + (tv.tv_usec * 1000); -} - -/* Warning: don't insert tracepoints into these functions, they are - also used by simpletrace backend and tracepoints would cause - an infinite recursion! */ -#ifdef _WIN32 -extern int64_t clock_freq; - -static inline int64_t get_clock(void) -{ - LARGE_INTEGER ti; - QueryPerformanceCounter(&ti); - return muldiv64(ti.QuadPart, NANOSECONDS_PER_SECOND, clock_freq); -} - -#else - -extern int use_rt_clock; - -static inline int64_t get_clock(void) -{ -#ifdef CLOCK_MONOTONIC - if (use_rt_clock) { - struct timespec ts; - clock_gettime(CLOCK_MONOTONIC, &ts); - return ts.tv_sec * 1000000000LL + ts.tv_nsec; - } else -#endif - { - /* XXX: using gettimeofday leads to problems if the date - changes, so it should be avoided. */ - return get_clock_realtime(); - } -} -#endif - -/* icount */ -int64_t cpu_get_icount_raw(void); -int64_t cpu_get_icount(void); -int64_t cpu_get_clock(void); -int64_t cpu_icount_to_ns(int64_t icount); - -/*******************************************/ -/* host CPU ticks (if available) */ - -#if defined(_ARCH_PPC) - -static inline int64_t cpu_get_host_ticks(void) -{ - int64_t retval; -#ifdef _ARCH_PPC64 - /* This reads timebase in one 64bit go and includes Cell workaround from: - http://ozlabs.org/pipermail/linuxppc-dev/2006-October/027052.html - */ - __asm__ __volatile__ ("mftb %0\n\t" - "cmpwi %0,0\n\t" - "beq- $-8" - : "=r" (retval)); -#else - /* http://ozlabs.org/pipermail/linuxppc-dev/1999-October/003889.html */ - unsigned long junk; - __asm__ __volatile__ ("mfspr %1,269\n\t" /* mftbu */ - "mfspr %L0,268\n\t" /* mftb */ - "mfspr %0,269\n\t" /* mftbu */ - "cmpw %0,%1\n\t" - "bne $-16" - : "=r" (retval), "=r" (junk)); -#endif - return retval; -} - -#elif defined(__i386__) - -static inline int64_t cpu_get_host_ticks(void) -{ - int64_t val; - asm volatile ("rdtsc" : "=A" (val)); - return val; -} - -#elif defined(__x86_64__) - -static inline int64_t cpu_get_host_ticks(void) -{ - uint32_t low,high; - int64_t val; - asm volatile("rdtsc" : "=a" (low), "=d" (high)); - val = high; - val <<= 32; - val |= low; - return val; -} - -#elif defined(__hppa__) - -static inline int64_t cpu_get_host_ticks(void) -{ - int val; - asm volatile ("mfctl %%cr16, %0" : "=r"(val)); - return val; -} - -#elif defined(__ia64) - -static inline int64_t cpu_get_host_ticks(void) -{ - int64_t val; - asm volatile ("mov %0 = ar.itc" : "=r"(val) :: "memory"); - return val; -} - -#elif defined(__s390__) - -static inline int64_t cpu_get_host_ticks(void) -{ - int64_t val; - asm volatile("stck 0(%1)" : "=m" (val) : "a" (&val) : "cc"); - return val; -} - -#elif defined(__sparc__) - -static inline int64_t cpu_get_host_ticks (void) -{ -#if defined(_LP64) - uint64_t rval; - asm volatile("rd %%tick,%0" : "=r"(rval)); - return rval; -#else - /* We need an %o or %g register for this. For recent enough gcc - there is an "h" constraint for that. Don't bother with that. */ - union { - uint64_t i64; - struct { - uint32_t high; - uint32_t low; - } i32; - } rval; - asm volatile("rd %%tick,%%g1; srlx %%g1,32,%0; mov %%g1,%1" - : "=r"(rval.i32.high), "=r"(rval.i32.low) : : "g1"); - return rval.i64; -#endif -} - -#elif defined(__mips__) && \ - ((defined(__mips_isa_rev) && __mips_isa_rev >= 2) || defined(__linux__)) -/* - * binutils wants to use rdhwr only on mips32r2 - * but as linux kernel emulate it, it's fine - * to use it. - * - */ -#define MIPS_RDHWR(rd, value) { \ - __asm__ __volatile__ (".set push\n\t" \ - ".set mips32r2\n\t" \ - "rdhwr %0, "rd"\n\t" \ - ".set pop" \ - : "=r" (value)); \ - } - -static inline int64_t cpu_get_host_ticks(void) -{ - /* On kernels >= 2.6.25 rdhwr <reg>, $2 and $3 are emulated */ - uint32_t count; - static uint32_t cyc_per_count = 0; - - if (!cyc_per_count) { - MIPS_RDHWR("$3", cyc_per_count); - } - - MIPS_RDHWR("$2", count); - return (int64_t)(count * cyc_per_count); -} - -#elif defined(__alpha__) - -static inline int64_t cpu_get_host_ticks(void) -{ - uint64_t cc; - uint32_t cur, ofs; - - asm volatile("rpcc %0" : "=r"(cc)); - cur = cc; - ofs = cc >> 32; - return cur - ofs; -} - -#else -/* The host CPU doesn't have an easily accessible cycle counter. - Just return a monotonically increasing value. This will be - totally wrong, but hopefully better than nothing. */ -static inline int64_t cpu_get_host_ticks (void) -{ - static int64_t ticks = 0; - return ticks++; -} -#endif - -#ifdef CONFIG_PROFILER -static inline int64_t profile_getclock(void) -{ - return get_clock(); -} - -extern int64_t tcg_time; -extern int64_t dev_time; -#endif - -#endif |