| #ifndef _GPXE_BIOS_TIMER_H |
| #define _GPXE_BIOS_TIMER_H |
| |
| /** @file |
| * |
| * BIOS timer |
| * |
| */ |
| |
| FILE_LICENCE ( GPL2_OR_LATER ); |
| |
| #ifdef TIMER_PCBIOS |
| #define TIMER_PREFIX_pcbios |
| #else |
| #define TIMER_PREFIX_pcbios __pcbios_ |
| #endif |
| |
| #include <gpxe/timer2.h> |
| |
| /** |
| * Delay for a fixed number of microseconds |
| * |
| * @v usecs Number of microseconds for which to delay |
| */ |
| static inline __always_inline void |
| TIMER_INLINE ( pcbios, udelay ) ( unsigned long usecs ) { |
| /* BIOS timer is not high-resolution enough for udelay(), so |
| * we use timer2 |
| */ |
| timer2_udelay ( usecs ); |
| } |
| |
| /** |
| * Get number of ticks per second |
| * |
| * @ret ticks_per_sec Number of ticks per second |
| */ |
| static inline __always_inline unsigned long |
| TIMER_INLINE ( pcbios, ticks_per_sec ) ( void ) { |
| /* BIOS timer ticks over at 18.2 ticks per second */ |
| return 18; |
| } |
| |
| #endif /* _GPXE_BIOS_TIMER_H */ |
