/* * 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 */ }