About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Documentation / powerpc / zImage_layout.txt




Custom Search

Based on kernel version 3.9. Page generated on 2013-05-02 23:12 EST.

1	          Information about the Linux/PPC kernel images
2	=====================================================================
3	
4	Please mail me (Cort Dougan, cort@fsmlabs.com) if you have questions,
5	comments or corrections.
6	
7	This document is meant to answer several questions I've had about how
8	the PReP system boots and how Linux/PPC interacts with that mechanism.
9	It would be nice if we could have information on how other architectures
10	boot here as well.  If you have anything to contribute, please
11	let me know.
12	
13	
14	1. PReP boot file
15	
16	  This is the file necessary to boot PReP systems from floppy or
17	  hard drive.  The firmware reads the PReP partition table entry
18	  and will load the image accordingly.
19	
20	  To boot the zImage, copy it onto a floppy with dd if=zImage of=/dev/fd0h1440
21	  or onto a PReP hard drive partition with dd if=zImage of=/dev/sda4
22	  assuming you've created a PReP partition (type 0x41) with fdisk on
23	  /dev/sda4.
24	
25	  The layout of the image format is:
26	
27	  0x0     +------------+
28	          |            | PReP partition table entry
29	          |            |
30	  0x400   +------------+
31	          |            | Bootstrap program code + data
32	          |            |
33	          |            |
34	          +------------+
35	          |            | compressed kernel, elf header removed
36	          +------------+
37	          |            | initrd (if loaded)
38	          +------------+
39	          |            | Elf section table for bootstrap program
40	          +------------+
41	
42	
43	2. MBX boot file
44	
45	  The MBX boards can load an elf image, and relocate it to the
46	  proper location in memory - it copies the image to the location it was
47	  linked at.
Hide Line Numbers
About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Information is copyright its respective author. All material is available from the Linux Kernel Source distributed under a GPL License. This page is provided as a free service by mjmwired.net.