2001/1023/alphapc/clock.c (diff list | history)

2001/1023/sys/src/9/alphapc/clock.c:1,104 – 2002/0410/sys/src/9/alphapc/clock.c:1,109 (short | long | prev | next)
1999/0415		#include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h"
1999/0429		#include "axp.h"
1999/0415		#include "ureg.h" void
1999/0429		clockinit(void)
1999/0415		{
1999/0429		}
1999/0415
1999/0429		uvlong cycletimer(void) { ulong pcc;
1999/0430		vlong delta;
1999/0429		pcc = rpcc(nil) & 0xFFFFFFFF; if(m->cpuhz == 0){ /* * pcclast is needed to detect wraparound of * the cycle timer which is only 32-bits. * m->cpuhz is set from the info passed from * the firmware. * This could be in clockinit if can * guarantee no wraparound between then and now. * * All the clock stuff needs work. */ m->cpuhz = hwrpb->cfreq; m->pcclast = pcc; }
1999/0430		delta = pcc - m->pcclast; if(delta < 0) delta += 0x100000000LL;
1999/0429		m->pcclast = pcc;
1999/0430		m->fastclock += delta;
1999/0429		return MACHP(0)->fastclock;
1999/0415		}
1999/0429		vlong
2002/0410		uvlong
1999/0429		fastticks(uvlong* hz)
1999/0415		{
1999/0429		uvlong ticks; int x;
1999/0415
1999/0429		x = splhi(); ticks = cycletimer(); splx(x); if(hz) *hz = m->cpuhz; return (vlong)ticks;
2002/0410		return ticks;
1999/0415		} void
2002/0410		timerset(uvlong) { } void
1999/0429		microdelay(int us)
1999/0415		{
1999/0429		uvlong eot;
1999/0415
1999/0501		eot = fastticks(nil) + (m->cpuhz/1000000)*us; while(fastticks(nil) < eot)
1999/0429		; }
1999/0415
1999/0429		void
2001/0727		delay(int millisecs)
1999/0429		{
2001/0727		microdelay(millisecs*1000);
1999/0415		} void
2001/0727		clock(Ureg *ureg)
1999/0415		{ static int count;
1999/0430		cycletimer();
2001/0727
1999/0415		/* HZ == 100, timer == 1024Hz. error < 1ms */ count += 100; if (count < 1024) return; count -= 1024;
2001/0727		portclock(ureg);
2002/0410		timerintr(ureg, 0);
1999/0415		}
2001/1023		ulong TK2MS(ulong ticks) { uvlong t, hz; t = ticks; hz = HZ; t *= 1000L; t = t/hz; ticks = t; return ticks; }