/*
   * 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
  ", 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);

  	}

  }