1What:		/sys/kernel/boot_params
2Date:		December 2013
3Contact:	Dave Young <dyoung@redhat.com>
4Description:	The /sys/kernel/boot_params directory contains two
5		files: "data" and "version" and one subdirectory "setup_data".
6		It is used to export the kernel boot parameters of an x86
7		platform to userspace for kexec and debugging purpose.
8
9		If there's no setup_data in boot_params the subdirectory will
10		not be created.
11
12		"data" file is the binary representation of struct boot_params.
13
14		"version" file is the string representation of boot
15		protocol version.
16
17		"setup_data" subdirectory contains the setup_data data
18		structure in boot_params. setup_data is maintained in kernel
19		as a link list. In "setup_data" subdirectory there's one
20		subdirectory for each link list node named with the number
21		of the list nodes. The list node subdirectory contains two
22		files "type" and "data". "type" file is the string
23		representation of setup_data type. "data" file is the binary
24		representation of setup_data payload.
25
26		The whole boot_params directory structure is like below::
27
28		  /sys/kernel/boot_params
29		  |__ data
30		  |__ setup_data
31		  |   |__ 0
32		  |   |   |__ data
33		  |   |   |__ type
34		  |   |__ 1
35		  |       |__ data
36		  |       |__ type
37		  |__ version
38
39Users:		Kexec
40