arch/mips/ralink/bootrom.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *
   4  * Copyright (C) 2013 John Crispin <john@phrozen.org>
   5  */
   6
   7 #include <linux/debugfs.h>
   8 #include <linux/seq_file.h>
   9
  10 #define BOOTROM_OFFSET  0x10118000
  11 #define BOOTROM_SIZE    0x8000
  12
  13 static void __iomem *membase = (void __iomem *) KSEG1ADDR(BOOTROM_OFFSET);
  14
  15 static int bootrom_show(struct seq_file *s, void *unused)
  16 {
  17         seq_write(s, membase, BOOTROM_SIZE);
  18
  19         return 0;
  20 }
  21
  22 static int bootrom_open(struct inode *inode, struct file *file)
  23 {
  24         return single_open(file, bootrom_show, NULL);
  25 }
  26
  27 static const struct file_operations bootrom_file_ops = {
  28         .open           = bootrom_open,
  29         .read           = seq_read,
  30         .llseek         = seq_lseek,
  31         .release        = single_release,
  32 };
  33
  34 static int __init bootrom_setup(void)
  35 {
  36         debugfs_create_file("bootrom", 0444, NULL, NULL, &bootrom_file_ops);
  37         return 0;
  38 }
  39
  40 postcore_initcall(bootrom_setup);