tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Atheros AR71XX/AR724X/AR913X specific prom routines
3 *
4 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation.
10 */
11
12#include <linux/kernel.h>
13#include <linux/init.h>
14#include <linux/io.h>
15#include <linux/string.h>
16
17#include <asm/bootinfo.h>
18#include <asm/addrspace.h>
19
20#include "common.h"
21
22static inline int is_valid_ram_addr(void *addr)
23{
24 if (((u32) addr > KSEG0) &&
25 ((u32) addr < (KSEG0 + ATH79_MEM_SIZE_MAX)))
26 return 1;
27
28 if (((u32) addr > KSEG1) &&
29 ((u32) addr < (KSEG1 + ATH79_MEM_SIZE_MAX)))
30 return 1;
31
32 return 0;
33}
34
35static __init void ath79_prom_init_cmdline(int argc, char **argv)
36{
37 int i;
38
39 if (!is_valid_ram_addr(argv))
40 return;
41
42 for (i = 0; i < argc; i++)
43 if (is_valid_ram_addr(argv[i])) {
44 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
45 strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline));
46 }
47}
48
49void __init prom_init(void)
50{
51 ath79_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
52}
53
54void __init prom_free_prom_memory(void)
55{
56 /* We do not have to prom memory to free */
57}