1998/0710/pc/archgeneric.c (diff list | history)

1998/0702/sys/src/9/pc/archgeneric.c:17,22 – 1998/0710/sys/src/9/pc/archgeneric.c:17,24 (short | long | prev | next)
add cycletimerinit, cycletimer. set as arch->fastclock on Pentium+ rsc Fri Mar 4 12:44:25 2005
1992/0923		}
1997/0327		void (*coherence)(void) = nop;
1998/0710		void cycletimerinit(void); uvlong cycletimer(uvlong*);
1997/0327		PCArch* arch; extern PCArch* knownarch[];
1998/0702/sys/src/9/pc/archgeneric.c:32,37 – 1998/0710/sys/src/9/pc/archgeneric.c:34,41
1997/0327		i8259enable, /* intrenable */ i8253enable, /* clockenable */
1998/0710		i8253read, /* read the standard timer */
1997/0327		}; typedef struct {
1998/0702/sys/src/9/pc/archgeneric.c:185,190 – 1998/0710/sys/src/9/pc/archgeneric.c:189,200
1997/0327		arch->intrenable = archgeneric.intrenable; }
1998/0710		/* pick the better timer */ if(X86FAMILY(m->cpuidax) >= 5){ cycletimerinit(); arch->fastclock = cycletimer; }
1997/0327		/* * Decide whether to use copy-on-reference (386 and mp). */
1998/0702/sys/src/9/pc/archgeneric.c:193,196 – 1998/0710/sys/src/9/pc/archgeneric.c:203,234
1997/0327		if(X86FAMILY(m->cpuidax) == 6 /*&& conf.nmach > 1*/) coherence = wbflush;
1998/0710		} static uvlong fasthz; void cycletimerinit(void) { fasthz = 1000000LL*m->cpumhz; } /* * return the most precice clock we have */ uvlong cycletimer(uvlong *hz) { uvlong tsc; rdmsr(0x10, (vlong*)&tsc); if(hz != nil) *hz = fasthz; return tsc; } uvlong fastticks(uvlong *hz) { return (*arch->fastclock)(hz);
1997/0327		}