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Linux/arch/mips/ralink/bootrom.c

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  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);
 41 

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