72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/*
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* Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
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* Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/bootmem.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/pfn.h>
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#include <linux/proc_fs.h>
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#include <linux/string.h>
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#include <linux/swap.h>
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#include <asm/bootinfo.h>
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#include <asm/page.h>
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#include <asm/sections.h>
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#include <asm/mach-ar7/ar7.h>
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#include <asm/mips-boards/prom.h>
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static int __init memsize(void)
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{
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u32 size = (64 << 20);
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u32 *addr = (u32 *)KSEG1ADDR(AR7_SDRAM_BASE + size - 4);
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u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end));
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u32 *tmpaddr = addr;
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while (tmpaddr > kernel_end) {
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*tmpaddr = (u32)tmpaddr;
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size >>= 1;
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tmpaddr -= size >> 2;
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}
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do {
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tmpaddr += size >> 2;
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if (*tmpaddr != (u32)tmpaddr)
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break;
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size <<= 1;
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} while (size < (64 << 20));
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writel((u32)tmpaddr, &addr);
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return size;
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}
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void __init prom_meminit(void)
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{
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unsigned long pages;
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pages = memsize() >> PAGE_SHIFT;
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add_memory_region(PHYS_OFFSET, pages << PAGE_SHIFT, BOOT_MEM_RAM);
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}
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void __init prom_free_prom_memory(void)
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{
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/* Nothing to free */
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}
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