diff options
Diffstat (limited to 'target/linux/ramips/patches-3.18/0004-MIPS-ralink-adds-a-bootrom-dumper-module.patch')
| -rw-r--r-- | target/linux/ramips/patches-3.18/0004-MIPS-ralink-adds-a-bootrom-dumper-module.patch | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.18/0004-MIPS-ralink-adds-a-bootrom-dumper-module.patch b/target/linux/ramips/patches-3.18/0004-MIPS-ralink-adds-a-bootrom-dumper-module.patch new file mode 100644 index 0000000..049a876 --- /dev/null +++ b/target/linux/ramips/patches-3.18/0004-MIPS-ralink-adds-a-bootrom-dumper-module.patch @@ -0,0 +1,74 @@ +From af03898c74172ab16d610f3eeaa65f66401eb7db Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Tue, 21 May 2013 15:50:31 +0200 +Subject: [PATCH 04/57] 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 + +--- a/arch/mips/ralink/Makefile ++++ b/arch/mips/ralink/Makefile +@@ -16,3 +16,5 @@ obj-$(CONFIG_SOC_RT3883) += rt3883.o + obj-$(CONFIG_SOC_MT7620) += mt7620.o + + obj-$(CONFIG_EARLY_PRINTK) += early_printk.o ++ ++obj-$(CONFIG_DEBUG_FS) += bootrom.o +--- /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); |