1 #ifndef _GPXE_TIMER_H 2 #define _GPXE_TIMER_H 3 4 /** @file 5 * 6 * gPXE timer API 7 * 8 * The timer API provides udelay() for fixed delays, and currticks() 9 * for a monotonically increasing tick counter. 10 */ 11 12 FILE_LICENCE ( GPL2_OR_LATER ); 13 14 #include <gpxe/api.h> 15 #include <config/timer.h> 16 17 /** 18 * Calculate static inline timer API function name 19 * 20 * @v _prefix Subsystem prefix 21 * @v _api_func API function 22 * @ret _subsys_func Subsystem API function 23 */ 24 #define TIMER_INLINE( _subsys, _api_func ) \ 25 SINGLE_API_INLINE ( TIMER_PREFIX_ ## _subsys, _api_func ) 26 27 /** 28 * Provide a timer API implementation 29 * 30 * @v _prefix Subsystem prefix 31 * @v _api_func API function 32 * @v _func Implementing function 33 */ 34 #define PROVIDE_TIMER( _subsys, _api_func, _func ) \ 35 PROVIDE_SINGLE_API ( TIMER_PREFIX_ ## _subsys, _api_func, _func ) 36 37 /** 38 * Provide a static inline timer API implementation 39 * 40 * @v _prefix Subsystem prefix 41 * @v _api_func API function 42 */ 43 #define PROVIDE_TIMER_INLINE( _subsys, _api_func ) \ 44 PROVIDE_SINGLE_API_INLINE ( TIMER_PREFIX_ ## _subsys, _api_func ) 45 46 /* Include all architecture-independent I/O API headers */ 47 #include <gpxe/efi/efi_timer.h> 48 49 /* Include all architecture-dependent I/O API headers */ 50 #include <bits/timer.h> 51 52 /** 53 * Delay for a fixed number of microseconds 54 * 55 * @v usecs Number of microseconds for which to delay 56 */ 57 void udelay ( unsigned long usecs ); 58 59 /** 60 * Get current system time in ticks 61 * 62 * @ret ticks Current time, in ticks 63 */ 64 unsigned long currticks ( void ); 65 66 /** 67 * Get number of ticks per second 68 * 69 * @ret ticks_per_sec Number of ticks per second 70 */ 71 unsigned long ticks_per_sec ( void ); 72 73 /** Number of ticks per second */ 74 #define TICKS_PER_SEC ( ticks_per_sec() ) 75 76 #endif /* _GPXE_TIMER_H */ 77
