Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * 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);

        }

}