1 /*
2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
5 *
6 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
7 */
8
9 #include <linux/debugfs.h>
10 #include <linux/seq_file.h>
11
12 #define BOOTROM_OFFSET 0x10118000
13 #define BOOTROM_SIZE 0x8000
14
15 static void __iomem *membase = (void __iomem *) KSEG1ADDR(BOOTROM_OFFSET);
16
bootrom_show(struct seq_file * s,void * unused)17 static int bootrom_show(struct seq_file *s, void *unused)
18 {
19 seq_write(s, membase, BOOTROM_SIZE);
20
21 return 0;
22 }
23
bootrom_open(struct inode * inode,struct file * file)24 static int bootrom_open(struct inode *inode, struct file *file)
25 {
26 return single_open(file, bootrom_show, NULL);
27 }
28
29 static const struct file_operations bootrom_file_ops = {
30 .open = bootrom_open,
31 .read = seq_read,
32 .llseek = seq_lseek,
33 .release = single_release,
34 };
35
bootrom_setup(void)36 static int bootrom_setup(void)
37 {
38 if (!debugfs_create_file("bootrom", 0444,
39 NULL, NULL, &bootrom_file_ops)) {
40 pr_err("Failed to create bootrom debugfs file\n");
41
42 return -EINVAL;
43 }
44
45 return 0;
46 }
47
48 postcore_initcall(bootrom_setup);
49