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-rw-r--r--target/linux/ramips/patches-3.8/0050-MIPS-ralink-adds-a-bootrom-dumper-module.patch83
1 files changed, 83 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.8/0050-MIPS-ralink-adds-a-bootrom-dumper-module.patch b/target/linux/ramips/patches-3.8/0050-MIPS-ralink-adds-a-bootrom-dumper-module.patch
new file mode 100644
index 0000000000..893a4083ed
--- /dev/null
+++ b/target/linux/ramips/patches-3.8/0050-MIPS-ralink-adds-a-bootrom-dumper-module.patch
@@ -0,0 +1,83 @@
+From d0d5dff525d921a7200d4919ea46c51fce27b7fb Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Tue, 21 May 2013 15:50:31 +0200
+Subject: [PATCH 50/79] MIPS: ralink: adds a bootrom dumper module
+
+This patch adds a trivial driver that allows userland to extract the bootrom of
+a SoC via debugfs.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/ralink/Makefile | 2 ++
+ arch/mips/ralink/bootrom.c | 48 ++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 50 insertions(+)
+ create mode 100644 arch/mips/ralink/bootrom.c
+
+diff --git a/arch/mips/ralink/Makefile b/arch/mips/ralink/Makefile
+index cae7d88..5fa6129 100644
+--- a/arch/mips/ralink/Makefile
++++ b/arch/mips/ralink/Makefile
+@@ -15,4 +15,6 @@ obj-$(CONFIG_SOC_MT7620) += mt7620.o
+
+ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
+
++obj-$(CONFIG_DEBUG_FS) += bootrom.o
++
+ obj-y += dts/
+diff --git a/arch/mips/ralink/bootrom.c b/arch/mips/ralink/bootrom.c
+new file mode 100644
+index 0000000..f926f6f
+--- /dev/null
++++ b/arch/mips/ralink/bootrom.c
+@@ -0,0 +1,48 @@
++/*
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation.
++ *
++ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/debugfs.h>
++#include <linux/seq_file.h>
++
++#define BOOTROM_OFFSET 0x10118000
++#define BOOTROM_SIZE 0x8000
++
++static void __iomem *membase = (void __iomem*) KSEG1ADDR(BOOTROM_OFFSET);
++
++static int bootrom_show(struct seq_file *s, void *unused)
++{
++ seq_write(s, membase, BOOTROM_SIZE);
++
++ return 0;
++}
++
++static int bootrom_open(struct inode *inode, struct file *file)
++{
++ return single_open(file, bootrom_show, NULL);
++}
++
++static const struct file_operations bootrom_file_ops = {
++ .open = bootrom_open,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = single_release,
++};
++
++static int bootrom_setup(void)
++{
++ if (!debugfs_create_file("bootrom", 0444,
++ NULL, NULL, &bootrom_file_ops)) {
++ pr_err("Failed to create bootrom debugfs file\n");
++
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++postcore_initcall(bootrom_setup);
+--
+1.7.10.4
+