73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
|
||
|
|
* Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
#include <linux/bootmem.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/mm.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/pfn.h>
|
||
|
|
#include <linux/proc_fs.h>
|
||
|
|
#include <linux/string.h>
|
||
|
|
#include <linux/swap.h>
|
||
|
|
|
||
|
|
#include <asm/bootinfo.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
#include <asm/sections.h>
|
||
|
|
|
||
|
|
#include <asm/mach-ar7/ar7.h>
|
||
|
|
#include <asm/mips-boards/prom.h>
|
||
|
|
|
||
|
|
static int __init memsize(void)
|
||
|
|
{
|
||
|
|
u32 size = (64 << 20);
|
||
|
|
u32 *addr = (u32 *)KSEG1ADDR(AR7_SDRAM_BASE + size - 4);
|
||
|
|
u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end));
|
||
|
|
u32 *tmpaddr = addr;
|
||
|
|
|
||
|
|
while (tmpaddr > kernel_end) {
|
||
|
|
*tmpaddr = (u32)tmpaddr;
|
||
|
|
size >>= 1;
|
||
|
|
tmpaddr -= size >> 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
do {
|
||
|
|
tmpaddr += size >> 2;
|
||
|
|
if (*tmpaddr != (u32)tmpaddr)
|
||
|
|
break;
|
||
|
|
size <<= 1;
|
||
|
|
} while (size < (64 << 20));
|
||
|
|
|
||
|
|
writel((u32)tmpaddr, &addr);
|
||
|
|
|
||
|
|
return size;
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init prom_meminit(void)
|
||
|
|
{
|
||
|
|
unsigned long pages;
|
||
|
|
|
||
|
|
pages = memsize() >> PAGE_SHIFT;
|
||
|
|
add_memory_region(PHYS_OFFSET, pages << PAGE_SHIFT,
|
||
|
|
BOOT_MEM_RAM);
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init prom_free_prom_memory(void)
|
||
|
|
{
|
||
|
|
/* Nothing to free */
|
||
|
|
}
|