patch-2.4.19 linux-2.4.19/arch/mips64/mips-boards/generic/memory.c

• Lines: 264
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.18/arch/mips64/mips-boards/generic/memory.c
• Orig date: Sun Sep 9 10:43:02 2001

diff -urN linux-2.4.18/arch/mips64/mips-boards/generic/memory.c linux-2.4.19/arch/mips64/mips-boards/generic/memory.c
@@ -1,263 +0,0 @@
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
- *
- * ########################################################################
- *
- *  This program is free software; you can distribute it and/or modify it
- *  under the terms of the GNU General Public License (Version 2) as
- *  published by the Free Software Foundation.
- *
- *  This program is distributed in the hope it will be useful, but WITHOUT
- *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- *  for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * ########################################################################
- *
- * PROM library functions for acquiring/using memory descriptors given to 
- * us from the YAMON.
- * 
- */
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/mm.h>
-#include <linux/bootmem.h>
-
-#include <asm/bootinfo.h>
-#include <asm/page.h>
-
-#include <asm/mips-boards/prom.h>
-
-/*#define DEBUG*/
-
-enum yamon_memtypes {
-	yamon_dontuse,
-	yamon_prom,
-	yamon_free,
-};
-struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
-
-#define MEMTYPE_DONTUSE 0
-#define MEMTYPE_PROM    1
-#define MEMTYPE_FREE    2
-
-#ifdef DEBUG
-static char *mtypes[3] = {
-	"Dont use memory",
-	"YAMON PROM memory",
-	"Free memmory",
-};
-#endif
-
-/* References to section boundaries */
-extern char _end;
-
-#define PFN_ALIGN(x)    (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
-
-struct prom_pmemblock * __init prom_getmdesc(void)
-{
-	char *memsize_str;
-	unsigned int memsize;
-
-	memsize_str = prom_getenv("memsize");
-	if (!memsize_str) {
-		prom_printf("memsize not set in boot prom, set to default (32Mb)\n");
-		memsize = 0x02000000;
-	} else {
-#ifdef DEBUG
-		prom_printf("prom_memsize = %s\n", memsize_str);
-#endif
-		memsize = simple_strtol(memsize_str, NULL, 0);
-	}
-
-	memset(mdesc, 0, sizeof(mdesc));
-
-	mdesc[0].type = yamon_dontuse;
-	mdesc[0].base = 0x00000000;
-	mdesc[0].size = 0x00001000;
-
-	mdesc[1].type = yamon_prom;
-	mdesc[1].base = 0x00001000;
-	mdesc[1].size = 0x000ef000;
-
-#if (CONFIG_MIPS_MALTA)
-	/* 
-	 * The area 0x000f0000-0x000fffff is allocated for BIOS memory by the
-	 * south bridge and PCI access always forwarded to the ISA Bus and 
-	 * BIOSCS# is always generated.
-	 * This mean that this area can't be used as DMA memory for PCI 
-	 * devices.
-	 */
-	mdesc[2].type = yamon_dontuse;
-	mdesc[2].base = 0x000f0000;
-	mdesc[2].size = 0x00010000;
-#else
-	mdesc[2].type = yamon_prom;
-	mdesc[2].base = 0x000f0000;
-	mdesc[2].size = 0x00010000;
-#endif
-
-	mdesc[3].type = yamon_dontuse;
-	mdesc[3].base = 0x00100000;
-	mdesc[3].size = CPHYSADDR(PFN_ALIGN(&_end)) - mdesc[3].base;
-
-	mdesc[4].type = yamon_free;
-	mdesc[4].base = CPHYSADDR(PFN_ALIGN(&_end));
-	mdesc[4].size = memsize - mdesc[4].base;
-
-	return &mdesc[0];
-}
-
-int __init page_is_ram(unsigned long pagenr)
-{
-	if ((pagenr << PAGE_SHIFT) < mdesc[4].base + mdesc[4].size)
-		return 1;
-
-	return 0;
-}
-
-static struct prom_pmemblock pblocks[PROM_MAX_PMEMBLOCKS];
-
-static int __init prom_memtype_classify (unsigned int type)
-{
-	switch (type) {
-	case yamon_free:
-		return MEMTYPE_FREE;
-	case yamon_prom:
-		return MEMTYPE_PROM;
-	default:
-		return MEMTYPE_DONTUSE;
-	}
-}
-
-static inline unsigned long find_max_low_pfn(void)
-{
-	struct prom_pmemblock *p, *highest;
-	unsigned long pfn;
-
-	p = pblocks;
-	highest = 0;
-	while (p->size != 0) {
-		if (!highest || p->base > highest->base)
-			highest = p;
-		p++;
-        }
-
-	pfn = (highest->base + highest->size) >> PAGE_SHIFT;
-#ifdef DEBUG
-	prom_printf("find_max_low_pfn: 0x%lx pfns.\n", pfn);
-#endif
-	return pfn;
-}
-
-static inline struct prom_pmemblock *find_largest_memblock(void)
-{
-	struct prom_pmemblock *p, *largest;
-
-	p = pblocks;
-	largest = 0;
-	while (p->size != 0) {
-		if (!largest || p->size > largest->size)
-			largest = p;
-		p++;
-	}
-
-	return largest;
-}
-
-void __init prom_meminit(void)
-{
-	struct prom_pmemblock *largest, *p;
-	unsigned long bootmap_size;
-	int totram;
-	int i = 0;
-
-#ifdef DEBUG
-	prom_printf("YAMON MEMORY DESCRIPTOR dump:\n");
-	p = prom_getmdesc();
-	while (p->size) {
-		prom_printf("[%d,%p]: base<%08lx> size<%08lx> type<%s>\n",
-			    i, p, p->base, p->size, mtypes[p->type]);
-		p++;
-		i++;
-	}
-#endif
-	totram = 0;
-	i = 0;
-	p = prom_getmdesc();
-
-	while (p->size) {
-		pblocks[i].type = prom_memtype_classify (p->type);
-		pblocks[i].base = p->base;
-		pblocks[i].size = p->size;
-		switch (pblocks[i].type) {
-		case MEMTYPE_FREE:
-			totram += pblocks[i].size;
-#ifdef DEBUG
-			prom_printf("free_chunk[%d]: base=%08lx size=%d\n",
-				    i, pblocks[i].base, pblocks[i].size);
-#endif
-			i++;
-			break;
-		case MEMTYPE_PROM:
-#ifdef DEBUG
-		        prom_printf("prom_chunk[%d]: base=%08lx size=%d\n",
-				    i, pblocks[i].base, pblocks[i].size);
-#endif
-			i++;
-			break;
-		default:
-			break;
-		}
-		p++;
-	}
-	pblocks[i].base = 0xdeadbeef;
-	pblocks[i].size = 0; /* indicates last elem. of array */
-
-	max_low_pfn = find_max_low_pfn();
-	largest = find_largest_memblock();
-	bootmap_size = init_bootmem(largest->base >> PAGE_SHIFT, max_low_pfn);
-
-	for (i = 0; pblocks[i].size; i++)
-		if (pblocks[i].type == MEMTYPE_FREE)
-			free_bootmem(pblocks[i].base, pblocks[i].size);
-
-	/* This test is simpleminded.  It will fail if the bootmem bitmap
-	   falls into multiple adjacent PROM memory areas.  */
-	if (bootmap_size > largest->size) {
-		prom_printf("CRITIAL: overwriting PROM data.\n");
-		BUG();
-	}
-
-	/* Reserve the memory bootmap itself */
-	reserve_bootmem(largest->base, bootmap_size);
-	printk("PROMLIB: Total free ram %d bytes (%dK,%dMB)\n",
-	       totram, (totram/1024), (totram/1024/1024));
-}
-
-void prom_free_prom_memory (void)
-{
-	struct prom_pmemblock *p;
-	unsigned long freed = 0;
-	unsigned long addr;
-
-	for (p = pblocks; p->size != 0; p++) {
-		if (p->type != MEMTYPE_PROM)
-			continue;
-
-		addr = p->base;
-		while (addr < p->base + p->size) {
-		        ClearPageReserved(virt_to_page(__va(addr)));
-			set_page_count(virt_to_page(__va(addr)), 1);
-			free_page(__va(addr));
-			addr += PAGE_SIZE;
-			freed += PAGE_SIZE;
-		}
-	}
-	printk("Freeing prom memory: %ldkb freed\n", freed >> 10);
-}