| /* |
| * Copyright (C) 2005 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. |
| * |
| */ |
| #include <linux/init.h> |
| #include <linux/mm.h> |
| #include <linux/bootmem.h> |
| #include <linux/pfn.h> |
| |
| #include <asm/bootinfo.h> |
| #include <asm/page.h> |
| #include <asm/sections.h> |
| |
| #include <asm/mips-boards/prom.h> |
| |
| /*#define DEBUG*/ |
| |
| enum simmem_memtypes { |
| simmem_reserved = 0, |
| simmem_free, |
| }; |
| struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS]; |
| |
| #ifdef DEBUG |
| static char *mtypes[3] = { |
| "SIM reserved memory", |
| "SIM free memory", |
| }; |
| #endif |
| |
| struct prom_pmemblock * __init prom_getmdesc(void) |
| { |
| unsigned int memsize; |
| |
| memsize = 0x02000000; |
| pr_info("Setting default memory size 0x%08x\n", memsize); |
| |
| memset(mdesc, 0, sizeof(mdesc)); |
| |
| mdesc[0].type = simmem_reserved; |
| mdesc[0].base = 0x00000000; |
| mdesc[0].size = 0x00001000; |
| |
| mdesc[1].type = simmem_free; |
| mdesc[1].base = 0x00001000; |
| mdesc[1].size = 0x000ff000; |
| |
| mdesc[2].type = simmem_reserved; |
| mdesc[2].base = 0x00100000; |
| mdesc[2].size = CPHYSADDR(PFN_ALIGN(&_end)) - mdesc[2].base; |
| |
| mdesc[3].type = simmem_free; |
| mdesc[3].base = CPHYSADDR(PFN_ALIGN(&_end)); |
| mdesc[3].size = memsize - mdesc[3].base; |
| |
| return &mdesc[0]; |
| } |
| |
| static int __init prom_memtype_classify(unsigned int type) |
| { |
| switch (type) { |
| case simmem_free: |
| return BOOT_MEM_RAM; |
| case simmem_reserved: |
| default: |
| return BOOT_MEM_RESERVED; |
| } |
| } |
| |
| void __init prom_meminit(void) |
| { |
| struct prom_pmemblock *p; |
| |
| p = prom_getmdesc(); |
| |
| while (p->size) { |
| long type; |
| unsigned long base, size; |
| |
| type = prom_memtype_classify(p->type); |
| base = p->base; |
| size = p->size; |
| |
| add_memory_region(base, size, type); |
| p++; |
| } |
| } |
| |
| void __init prom_free_prom_memory(void) |
| { |
| int i; |
| unsigned long addr; |
| |
| for (i = 0; i < boot_mem_map.nr_map; i++) { |
| if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA) |
| continue; |
| |
| addr = boot_mem_map.map[i].addr; |
| free_init_pages("prom memory", |
| addr, addr + boot_mem_map.map[i].size); |
| } |
| } |