1990/03091/gnot/mmu.c (diff list | history)

gnot/mmu.c on 1990/03091
1990/03091		#include "u.h" #include "lib.h" #include "mem.h" #include "dat.h" #include "fns.h" /* * Called splhi, not in Running state */ void mapstack(Proc *p) { ulong tlbvirt, tlbphys; if(p->upage->va != (USERADDR|(p->pid&0xFFFF))) panic("mapstack %d 0x%lux 0x%lux", p->pid, p->upage->pa, p->upage->va); tlbvirt = USERADDR; tlbphys = PPN(p->upage->pa) | PTEVALID | PTEKERNEL; putkmmu(tlbvirt, tlbphys); flushmmu(); u = (User*)USERADDR; } void putkmmu(ulong tlbvirt, ulong tlbphys) { if(!(tlbvirt&KZERO)) panic("putkmmu"); tlbvirt &= ~KZERO; KMAP[(tlbvirt&0x003FE000L)>>2] = tlbphys; } void putmmu(ulong tlbvirt, ulong tlbphys) { if(tlbvirt&KZERO) panic("putmmu"); tlbphys |= VTAG(tlbvirt)<<24; UMAP[(tlbvirt&0x003FE000L)>>2] = tlbphys; } void flushmmu(void) { flushcpucache(); *PARAM &= ~TLBFLUSH_; *PARAM |= TLBFLUSH_; }