cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

bootrom.c (844B)

      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);