6d7d743375
This patch export the boot parameters via debugfs for debugging. The files added are as follow: boot_params/data : binary file for struct boot_params boot_params/version : boot protocol version This patch is based on 2.6.24-rc5-mm1 and has been tested on i386 and x86_64 platform. This patch is based on the Peter Anvin's proposal. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
/*
|
|
* Architecture specific debugfs files
|
|
*
|
|
* Copyright (C) 2007, Intel Corp.
|
|
* Huang Ying <ying.huang@intel.com>
|
|
*
|
|
* This file is released under the GPLv2.
|
|
*/
|
|
|
|
#include <linux/debugfs.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/setup.h>
|
|
|
|
#ifdef CONFIG_DEBUG_BOOT_PARAMS
|
|
static struct debugfs_blob_wrapper boot_params_blob = {
|
|
.data = &boot_params,
|
|
.size = sizeof(boot_params),
|
|
};
|
|
|
|
static int __init boot_params_kdebugfs_init(void)
|
|
{
|
|
int error;
|
|
struct dentry *dbp, *version, *data;
|
|
|
|
dbp = debugfs_create_dir("boot_params", NULL);
|
|
if (!dbp) {
|
|
error = -ENOMEM;
|
|
goto err_return;
|
|
}
|
|
version = debugfs_create_x16("version", S_IRUGO, dbp,
|
|
&boot_params.hdr.version);
|
|
if (!version) {
|
|
error = -ENOMEM;
|
|
goto err_dir;
|
|
}
|
|
data = debugfs_create_blob("data", S_IRUGO, dbp,
|
|
&boot_params_blob);
|
|
if (!data) {
|
|
error = -ENOMEM;
|
|
goto err_version;
|
|
}
|
|
return 0;
|
|
err_version:
|
|
debugfs_remove(version);
|
|
err_dir:
|
|
debugfs_remove(dbp);
|
|
err_return:
|
|
return error;
|
|
}
|
|
#endif
|
|
|
|
static int __init arch_kdebugfs_init(void)
|
|
{
|
|
int error = 0;
|
|
|
|
#ifdef CONFIG_DEBUG_BOOT_PARAMS
|
|
error = boot_params_kdebugfs_init();
|
|
#endif
|
|
|
|
return error;
|
|
}
|
|
|
|
arch_initcall(arch_kdebugfs_init);
|