hw/ptimer.h

   1 /*
   2  * General purpose implementation of a simple periodic countdown timer.
   3  *
   4  * Copyright (c) 2007 CodeSourcery.
   5  *
   6  * This code is licensed under the GNU LGPL.
   7  */
   8 #ifndef PTIMER_H
   9 #define PTIMER_H
  10
  11 #include "qemu-common.h"
  12 #include "qemu/timer.h"
  13 #include "migration/vmstate.h"
  14
  15 /* ptimer.c */
  16 typedef struct ptimer_state ptimer_state;
  17 typedef void (*ptimer_cb)(void *opaque);
  18
  19 ptimer_state *ptimer_init(QEMUBH *bh);
  20 void ptimer_set_period(ptimer_state *s, int64_t period);
  21 void ptimer_set_freq(ptimer_state *s, uint32_t freq);
  22 void ptimer_set_limit(ptimer_state *s, uint64_t limit, int reload);
  23 uint64_t ptimer_get_count(ptimer_state *s);
  24 void ptimer_set_count(ptimer_state *s, uint64_t count);
  25 void ptimer_run(ptimer_state *s, int oneshot);
  26 void ptimer_stop(ptimer_state *s);
  27
  28 extern const VMStateDescription vmstate_ptimer;
  29
  30 #define VMSTATE_PTIMER(_field, _state) {                             \
  31     .name       = (stringify(_field)),                               \
  32     .version_id = (1),                                               \
  33     .vmsd       = &vmstate_ptimer,                                   \
  34     .size       = sizeof(ptimer_state *),                            \
  35     .flags      = VMS_STRUCT|VMS_POINTER,                            \
  36     .offset     = vmstate_offset_pointer(_state, _field, ptimer_state), \
  37 }
  38
  39 #endif