0,0 → 1,61 |
/* |
* 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 <arch/drivers/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; |
int i; |
|
for (i = 0; i < MEMMAP_MAX_RECORDS; i++) { |
if (memmap[i].size == 0) |
break; |
total += memmap[i].size; |
} |
|
return total; |
} |