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 
prom_init(void)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 
prom_free_prom_memory(void)36 void __init prom_free_prom_memory(void)
37 {
38 	/* We do not have to prom memory to free */
39 }
40