1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Atheros AR71XX/AR724X/AR913X specific prom routines 4 * 5 * Copyright (C) 2015 Laurent Fasnacht <l@libres.ch> 6 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org> 7 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/init.h> 12 #include <linux/io.h> 13 #include <linux/string.h> 14 #include <linux/initrd.h> 15 16 #include <asm/bootinfo.h> 17 #include <asm/addrspace.h> 18 #include <asm/fw/fw.h> 19 20 #include "common.h" 21 22 void __init prom_init(void) 23 { 24 fw_init_cmdline(); 25 26 #ifdef CONFIG_BLK_DEV_INITRD 27 /* Read the initrd address from the firmware environment */ 28 initrd_start = fw_getenvl("initrd_start"); 29 if (initrd_start) { 30 initrd_start = KSEG0ADDR(initrd_start); 31 initrd_end = initrd_start + fw_getenvl("initrd_size"); 32 } 33 #endif 34 } 35