// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> * Copyright (C) 2007 Eugene Konev <ejka@openwrt.org> */ #include <linux/memblock.h> #include <linux/init.h> #include <linux/mm.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> 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 */ }