1993/0210/pc/mmu.c (diff list | history)

1993/0120/sys/src/9/pc/mmu.c:351,381 – 1993/0210/sys/src/9/pc/mmu.c:351,353 (short | long | prev | next)
1992/0929		unlock(&isamemalloc); return a;
1991/0703		}
1993/0120		/* * mapping for user access to d segment (access to TARGA) */ Page* dsegalloc(Segment *s, ulong va) { Page *pg;                  pg = smalloc(sizeof(Page)); memset(pg, 0, sizeof(Page)); pg->va = va; pg->pa = 0xd0000 + (va - s->base); pg->ref = 1; return pg; }                  void dsegfree(Page *pg) { int x;                  lock(pg); x = --pg->ref; unlock(pg); if(x <= 0) free(pg); }