1997/1011/pc/memory.c (diff list | history)

1997/0823/sys/src/9/pc/memory.c:99,105 – 1997/1011/sys/src/9/pc/memory.c:99,105 (short | long | prev | next)
1997/0329		#endif /* notdef */ void
1997/0327		mapfree(RMap* rmap, ulong addr, int size)
1997/1011		mapfree(RMap* rmap, ulong addr, ulong size)
1997/0327		{ Map *mp; ulong t;
1997/0823/sys/src/9/pc/memory.c:256,262 – 1997/1011/sys/src/9/pc/memory.c:256,262
1997/0327		* the BIOS data area. */ x = PADDR(CPU0MACH+BY2PG); bda = (uchar*)(KZERO|0x400);
1997/1011		bda = (uchar*)KADDR(0x400);
1997/0327		mapfree(&rmapram, x, ((bda[0x14]<<8)|bda[0x13])*KB-x);
1997/0522		x = PADDR(PGROUND((ulong)end));
1997/0823/sys/src/9/pc/memory.c:290,296 – 1997/1011/sys/src/9/pc/memory.c:290,296
1997/0327		* be written and read correctly. The page tables are created here * on the fly, allocating from low memory as necessary. */ k0 = (ulong*)KZERO;
1997/1011		k0 = (ulong*)KADDR(0);
1997/0327		kzero = *k0; map = 0; x = 0x12345678;
1997/0823/sys/src/9/pc/memory.c:383,429 – 1997/1011/sys/src/9/pc/memory.c:383,393
1997/0327		mapfree(&rmapram, map, BY2PG);
1997/0329		if(pa < maxmem) mapfree(&rmapupa, pa, maxmem-pa);
1997/1011		if(maxmem < 0xFEC00000) mapfree(&rmapupa, maxmem, 0xFEC00000-maxmem);
1997/0327		*k0 = kzero; } static void upainit(void) { ulong addr, pa, pae, *table, *va, x;                  /*
1997/0811		* Allocate an 8MB chunk aligned to 16MB. Later can
1997/0327		* make the region selectable via conf if necessary. */
1997/0811		if((addr = mapalloc(&rmapupa, 0, 8*MB, 16*MB)) == 0)
1997/0327		return;                  pa = addr;
1997/0823		pae = pa+(8*MB);
1997/0327		while(pa < pae){ va = KADDR(pa); table = &((ulong*)m->pdb)[PDX(va)]; if((pa % (4*MB)) == 0 && (m->cpuiddx & 0x08)){ *table = pa|PTESIZE|PTEWRITE|PTEUNCACHED|PTEVALID; pa += (4*MB); } else{ if(*table == 0){ if((x = mapalloc(&rmapram, 0, BY2PG, BY2PG)) == 0) break; memset(KADDR(x), 0, BY2PG); *table = x|PTEWRITE|PTEVALID; } table = (ulong*)(KZERO|PPN(*table)); table[PTX(va)] = pa|PTEWRITE|PTEUNCACHED|PTEVALID; pa += BY2PG; } }                  mapfree(&xrmapupa, addr, pa-addr); }
1997/0329
1997/0327		void
1997/0329		meminit(ulong maxmem)
1997/0327		{
1997/0823/sys/src/9/pc/memory.c:448,454 – 1997/1011/sys/src/9/pc/memory.c:412,417
1997/0327		umbscan();
1997/0329		ramscan(maxmem);
1997/0327		upainit(); /* * Set the conf entries describing two banks of allocatable memory.
1997/0823/sys/src/9/pc/memory.c:477,483 – 1997/1011/sys/src/9/pc/memory.c:440,446
1997/0327		ulong a; if(a = mapalloc(&rmapumb, addr, size, align)) return KZERO|a;
1997/1011		return (ulong)KADDR(a);
1997/0327		return 0; }
1997/0823/sys/src/9/pc/memory.c:485,491 – 1997/1011/sys/src/9/pc/memory.c:448,454
1997/0327		void umbfree(ulong addr, int size) { mapfree(&rmapumb, addr & ~KZERO, size);
1997/1011		mapfree(&rmapumb, PADDR(addr), size);
1997/0329		} ulong
1997/0823/sys/src/9/pc/memory.c:495,501 – 1997/1011/sys/src/9/pc/memory.c:458,464
1997/0331		uchar *p;
1997/0329
1997/0331		if(a = mapalloc(&rmapumbrw, addr, size, align))
1997/0329		return KZERO|a;
1997/1011		return(ulong)KADDR(a);
1997/0329
1997/0331		/* * Perhaps the memory wasn't visible before
1997/0823/sys/src/9/pc/memory.c:516,537 – 1997/1011/sys/src/9/pc/memory.c:479,514
1997/0331		void umbrwfree(ulong addr, int size) { mapfree(&rmapumbrw, addr & ~KZERO, size);
1997/1011		mapfree(&rmapumbrw, PADDR(addr), size);
1997/0327		} ulong upamalloc(ulong addr, int size, int align) { ulong a;
1997/1011		ulong a, ae;
1997/0327		if(a = mapalloc(&xrmapupa, addr, size, align)) return KZERO|a;
1997/1011		return (ulong)KADDR(a);
1997/0327		return 0;
1997/1011		if((a = mapalloc(&rmapupa, addr, size, align)) == 0) return 0; ae = mmukmap(a, 0, size); /* * Should check here that it was all delivered * and put it back and barf if not. */ USED(ae); /* * Be very careful this returns a PHYSICAL address. */ return a;
1997/0327		} void upafree(ulong addr, int size) { mapfree(&xrmapupa, addr & ~KZERO, size);
1997/1011		mapfree(&xrmapupa, addr, size);
1997/0327		}