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070cbebc26
Timers are sometimes required before the call to initialise(), so we cannot rely on initialise() to set up the timers before use. Also fix a potential integer overflow issue in generic_currticks_udelay()
42 lines
770 B
C
42 lines
770 B
C
#ifndef GPXE_TIMER_H
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#define GPXE_TIMER_H
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#include <stddef.h>
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#include <gpxe/tables.h>
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typedef unsigned long tick_t;
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#define MSECS_IN_SEC (1000)
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#define USECS_IN_SEC (1000*1000)
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#define USECS_IN_MSEC (1000)
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#define TICKS_PER_SEC USECS_IN_SEC
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extern tick_t currticks ( void );
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extern void generic_currticks_udelay ( unsigned int usecs );
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/** A timer */
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struct timer {
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/** Initialise timer
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*
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* @ret rc Return status code
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*/
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int ( * init ) ( void );
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/** Read current time
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*
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* @ret ticks Current time, in ticks
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*/
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tick_t ( * currticks ) ( void );
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/** Delay
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*
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* @v usecs Time to delay, in microseconds
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*/
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void ( * udelay ) ( unsigned int usecs );
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};
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#define __timer( order ) __table ( struct timer, timers, order )
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#endif /* GPXE_TIMER_H */
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