/*
* Copyright (C) 2005 Martin Decky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch/mm/memory_init.h>
#include <genarch/ofw/ofw.h>
#include <panic.h>
#define MEMMAP_MAX_RECORDS 32
typedef struct {
__u32 start;
__u32 size;
} memmap_t;
size_t get_memory_size(void)
{
phandle handle = ofw_find_device("/memory");
if (handle == -1)
panic("No RAM\n");
memmap_t memmap[MEMMAP_MAX_RECORDS];
size_t ret = ofw_get_property(handle, "reg", &memmap, sizeof(memmap));
if (ret == -1)
panic("Device /memory has no reg property\n");
size_t total = 0;
int i;
for (i = 0; i < MEMMAP_MAX_RECORDS; i++) {
if (memmap[i].size == 0)
break;
total += memmap[i].size;
}
return total;
}