1991/1113/ss/clock.c (diff list | history)

ss/clock.c on 1990/1223
1990/1223		#include "u.h" #include "lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" #include "ureg.h" void delay(int ms) { ulong t, *p; int i;
1990/1226		ms *= 2000; /* experimentally determined */
1990/1223		for(i=0; i<ms; i++) ; }
1990/1227		typedef struct Ctr Ctr; struct Ctr { ulong ctr0; ulong lim0; ulong ctr1; ulong lim1; }; Ctr *ctr;
1990/1223		void
1990/1227		clockinit(void) { KMap *k; k = kmappa(CLOCK, PTENOCACHE|PTEIO); ctr = (Ctr*)k->va; ctr->lim1 = (CLOCKFREQ/HZ)<<10; } void
1990/1223		clock(Ureg *ur) { Proc *p;
1991/1113		ulong i, ss, nrun = 0; Segment *s;
1990/1223
1990/1227		i = ctr->lim1; /* clear interrupt */ USED(i);
1990/1223		m->ticks++; p = m->proc; if(p){
1991/1113		nrun = 1;
1990/1223		p->pc = ur->pc; if (p->state==Running) p->time[p->insyscall]++; }
1991/1113		nrun = (nrdy+nrun)*1000; MACHP(0)->load = (MACHP(0)->load*19+nrun)/20;
1990/1223		checkalarms(); kbdclock(); mouseclock();
1991/1003		sccclock();
1991/1006		kproftimer(ur->pc);
1990/1227		if((ur->psr&SPL(0xF))==0 && p && p->state==Running){
1991/0821		if(anyready()){ if(p->hasspin) p->hasspin = 0; else sched(); }
1991/0711		if((ur->psr&PSRPSUPER) == 0){
1991/1113		ss = spllo(); /* Low because we may fault */ *(ulong*)(USTKTOP-BY2WD) += TK2MS(1);
1991/1111		notify(ur);
1991/1113		splx(ss); /* return hi for restore */
1991/0711		}
1990/1223		} }