1991/0821/pc/mmu.c (diff list | history)

1991/0801/sys/src/9/pc/mmu.c:102,108 – 1991/0821/sys/src/9/pc/mmu.c:102,108 (short | long | prev | next)
1991/0719		void
1991/0703		mmuinit(void) {
1991/0717		int i, n, nkpt;
1991/0821		int i, nkpt, npage, nbytes;
1991/0717		ulong x; ulong y;
1991/0801/sys/src/9/pc/mmu.c:124,135 – 1991/0821/sys/src/9/pc/mmu.c:124,137
1991/0716		*/
1991/0719		/* allocate and fill low level page tables for kernel mem */ nkpt = ROUNDUP(conf.npage, 4*1024); nkpt = nkpt/(4*1024);
1991/0717		kpt = ialloc(nkpt*BY2PG, 1);
1991/0719		n = ROUNDUP(conf.npage, 1024);
1991/0718		for(i = 0; i < n; i++)
1991/0821		npage = (1024*1024)/BY2PG + conf.npage1; nbytes = PGROUND(npage*BY2WD); /* words of page map */ nkpt = nbytes/BY2PG; /* pages of page map */ kpt = ialloc(nbytes, 1); for(i = 0; i < npage; i++)
1991/0718		kpt[i] = (i<<PGSHIFT) | PTEVALID | PTEKERNEL | PTEWRITE;
1991/0821		print("%d low level pte's, %d high level pte's\n", npage, nkpt);
1991/0717		/* allocate page table for u-> */ upt = ialloc(BY2PG, 1);