1/* 2 * Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved. 3 * 4 * This program is free software; you can distribute it and/or modify it 5 * under the terms of the GNU General Public License (Version 2) as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * for more details. 12 * 13 * You should have received a copy of the GNU General Public License along 14 * with this program; if not, write to the Free Software Foundation, Inc., 15 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. 16 * 17 */ 18#include <linux/init.h> 19#include <linux/mm.h> 20#include <linux/bootmem.h> 21#include <linux/pfn.h> 22 23#include <asm/bootinfo.h> 24#include <asm/page.h> 25#include <asm/sections.h> 26 27#include <asm/mips-boards/prom.h> 28 29/*#define DEBUG*/ 30 31enum simmem_memtypes { 32 simmem_reserved = 0, 33 simmem_free, 34}; 35struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS]; 36 37#ifdef DEBUG 38static char *mtypes[3] = { 39 "SIM reserved memory", 40 "SIM free memory", 41}; 42#endif 43 44struct prom_pmemblock * __init prom_getmdesc(void) 45{ 46 unsigned int memsize; 47 48 memsize = 0x02000000; 49 pr_info("Setting default memory size 0x%08x\n", memsize); 50 51 memset(mdesc, 0, sizeof(mdesc)); 52 53 mdesc[0].type = simmem_reserved; 54 mdesc[0].base = 0x00000000; 55 mdesc[0].size = 0x00001000; 56 57 mdesc[1].type = simmem_free; 58 mdesc[1].base = 0x00001000; 59 mdesc[1].size = 0x000ff000; 60 61 mdesc[2].type = simmem_reserved; 62 mdesc[2].base = 0x00100000; 63 mdesc[2].size = CPHYSADDR(PFN_ALIGN(&_end)) - mdesc[2].base; 64 65 mdesc[3].type = simmem_free; 66 mdesc[3].base = CPHYSADDR(PFN_ALIGN(&_end)); 67 mdesc[3].size = memsize - mdesc[3].base; 68 69 return &mdesc[0]; 70} 71 72static int __init prom_memtype_classify(unsigned int type) 73{ 74 switch (type) { 75 case simmem_free: 76 return BOOT_MEM_RAM; 77 case simmem_reserved: 78 default: 79 return BOOT_MEM_RESERVED; 80 } 81} 82 83void __init prom_meminit(void) 84{ 85 struct prom_pmemblock *p; 86 87 p = prom_getmdesc(); 88 89 while (p->size) { 90 long type; 91 unsigned long base, size; 92 93 type = prom_memtype_classify(p->type); 94 base = p->base; 95 size = p->size; 96 97 add_memory_region(base, size, type); 98 p++; 99 } 100} 101 102void __init prom_free_prom_memory(void) 103{ 104 int i; 105 unsigned long addr; 106 107 for (i = 0; i < boot_mem_map.nr_map; i++) { 108 if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA) 109 continue; 110 111 addr = boot_mem_map.map[i].addr; 112 free_init_pages("prom memory", 113 addr, addr + boot_mem_map.map[i].size); 114 } 115} 116