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
22void __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