LXR linux/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
  13static void __iomem *membase = (void __iomem *) KSEG1ADDR(BOOTROM_OFFSET);
  14
  15static int bootrom_show(struct seq_file *s, void *unused)
  16{
  17        seq_write(s, membase, BOOTROM_SIZE);
  18
  19        return 0;
  20}
  21
  22static int bootrom_open(struct inode *inode, struct file *file)
  23{
  24        return single_open(file, bootrom_show, NULL);
  25}
  26
  27static 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
  34static int __init bootrom_setup(void)
  35{
  36        debugfs_create_file("bootrom", 0444, NULL, NULL, &bootrom_file_ops);
  37        return 0;
  38}
  39
  40postcore_initcall(bootrom_setup);
  41