1990/1227/ss/mmu.c (diff list | history)

1990/1226/sys/src/9/ss/mmu.c:40,45 – 1990/1227/sys/src/9/ss/mmu.c:40,50 (short | long | prev | next)
1990/1226		/* don't set m->pidhere[*tp] because we're only writing U entry */ tlbphys = PPN(p->upage->pa)|PTEVALID|PTEWRITE|PTEKERNEL|PTEMAINMEM; putcontext(tp-1);
1990/1227		/* * putw4(USERADDR, tlbphys) might be good enough but * there is that fuss in pexit/pwait() copying between * u areas and that might surprise any cache entries */
1990/1226		putpmeg(USERADDR, tlbphys);
1990/1223		u = (User*)USERADDR;
1990/1226		}
1990/1226/sys/src/9/ss/mmu.c:64,69 – 1990/1227/sys/src/9/ss/mmu.c:69,75
1990/1226		m->pidproc[i] = p; m->lastpid = i; print("new context %d\n", i);
1990/1227		putcontext(i-1);
1990/1223		/*
1990/1226		* kludge: each context is allowed 2 pmegs, one for text and one for stack
1990/1223		*/
1990/1226/sys/src/9/ss/mmu.c:128,138 – 1990/1227/sys/src/9/ss/mmu.c:134,143
1990/1226		/* * Invalidate user addresses */ /* for(l=UZERO; l<KZERO; l+=BY2SEGM)
1990/1227		for(l=UZERO; l<(KZERO&VAMASK); l+=BY2SEGM)
1990/1226		putsegm(l, INVALIDPMEG); */ putsegm(0x0000, INVALIDPMEG);
1990/1227
1990/1226		/* * One segment for screen */
1990/1226/sys/src/9/ss/mmu.c:168,176 – 1990/1227/sys/src/9/ss/mmu.c:173,178
1990/1226		putcontext(0);
1990/1223		}
1990/1226
1990/1223		void putmmu(ulong tlbvirt, ulong tlbphys) {
1990/1226/sys/src/9/ss/mmu.c:200,205 – 1990/1227/sys/src/9/ss/mmu.c:202,222
1990/1223		} void
1990/1227		putpmeg(ulong virt, ulong phys) { int i; virt &= VAMASK; virt &= ~(BY2PG-1); /* * Flush old entries from cache */ for(i=0; i<0x100; i++) putwD(virt+(i<<4), 0); putw4(virt, phys); } void
1990/1223		flushmmu(void) {
1990/1226		splhi();
1990/1226/sys/src/9/ss/mmu.c:233,239 – 1990/1227/sys/src/9/ss/mmu.c:250,255
1990/1223		KMap *k;
1990/1226		int i;
1990/1223
1990/1226		print("low pmeg %d\n", kmapalloc.lowpmeg);
1990/1223		kmapalloc.free = 0;
1990/1226		k = kmapalloc.arena; for(i=0; i<(IOEND-IOSEGM)/BY2PG; i++,k++){
1990/1226/sys/src/9/ss/mmu.c:243,249 – 1990/1227/sys/src/9/ss/mmu.c:259,265
1990/1223		} KMap*
1990/1226		kmap1(Page *pg, ulong flag)
1990/1227		kmappa(ulong pa, ulong flag)
1990/1223		{ KMap *k;
1990/1226/sys/src/9/ss/mmu.c:255,267 – 1990/1227/sys/src/9/ss/mmu.c:271,283
1990/1223		} kmapalloc.free = k->next; unlock(&kmapalloc); k->pa = pg->pa;
1990/1227		k->pa = pa;
1990/1226		/* * Cache is virtual and a pain to deal with. * Must avoid having the same entry in the cache twice, so * must use NOCACHE or else extreme cleverness elsewhere. */ putpmeg(k->va, PPN(k->pa)|PTEVALID|PTEKERNEL|PTEWRITE|PTENOCACHE|flag);
1990/1227		putpmeg(k->va, PPN(pa)|PTEVALID|PTEKERNEL|PTEWRITE|PTENOCACHE|flag);
1990/1223		return k; }
1990/1226/sys/src/9/ss/mmu.c:268,274 – 1990/1227/sys/src/9/ss/mmu.c:284,290
1990/1226		KMap* kmap(Page *pg) { return kmap1(pg, PTEMAINMEM);
1990/1227		return kmappa(pg->pa, PTEMAINMEM);
1990/1226		}
1990/1223		void