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}