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original_kernel/arch/mips/boot/compressed/head.S

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MIPS: Add support for GZIP / BZIP2 / LZMA compressed kernel images This patch helps to generate smaller kernel images for linux-MIPS, Here is the effect when using lzma: $ ls -sh vmlinux 7.1M vmlinux $ ls -sh vmlinuz 1.5M vmlinuz Have tested the 32bit kernel on Qemu/Malta and 64bit kernel on FuLoong Mini PC. both of them work well. and also, tested by Alexander Clouter on an AR7 based Linksys WAG54Gv2, and by Manuel Lauss on an Alchemy board. This -v2 version incorporate the feedback from Ralf, and add the following changes: 1. add .ecoff, .bin, .erec format support 2. only enable it and the debug source code for the machines we tested 3. a dozen of fixups and cleanups and if you want to enable it for your board, please try to select SYS_SUPPORTS_ZBOOT for it, and if the board have an 16550 compatible uart, you can select SYS_SUPPORTS_ZBOOT_UART16550 directly. and then sending the relative patches to Ralf. Tested-by: Manuel Lauss <manuel.lauss@googlemail.com> Tested-by: Alexander Clouter <alex@digriz.org.uk> Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-10-14 18:12:16 +08:00
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1994, 1995 Waldorf Electronics
* Written by Ralf Baechle and Andreas Busse
* Copyright (C) 1995 - 1999 Ralf Baechle
* Copyright (C) 1996 Paul M. Antoine
* Modified for DECStation and hence R3000 support by Paul M. Antoine
* Further modifications by David S. Miller and Harald Koerfgen
* Copyright (C) 1999 Silicon Graphics, Inc.
*/
#include <asm/asm.h>
#include <asm/regdef.h>
.set noreorder
.cprestore
LEAF(start)
start:
/* Save boot rom start args */
move s0, a0
move s1, a1
move s2, a2
move s3, a3
/* Clear BSS */
PTR_LA a0, _edata
PTR_LA a2, _end
1: sw zero, 0(a0)
bne a2, a0, 1b
addiu a0, a0, 4
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 19:59:30 +08:00
PTR_LA a0, (.heap) /* heap address */
PTR_LA sp, (.stack + 8192) /* stack address */
MIPS: Add support for GZIP / BZIP2 / LZMA compressed kernel images This patch helps to generate smaller kernel images for linux-MIPS, Here is the effect when using lzma: $ ls -sh vmlinux 7.1M vmlinux $ ls -sh vmlinuz 1.5M vmlinuz Have tested the 32bit kernel on Qemu/Malta and 64bit kernel on FuLoong Mini PC. both of them work well. and also, tested by Alexander Clouter on an AR7 based Linksys WAG54Gv2, and by Manuel Lauss on an Alchemy board. This -v2 version incorporate the feedback from Ralf, and add the following changes: 1. add .ecoff, .bin, .erec format support 2. only enable it and the debug source code for the machines we tested 3. a dozen of fixups and cleanups and if you want to enable it for your board, please try to select SYS_SUPPORTS_ZBOOT for it, and if the board have an 16550 compatible uart, you can select SYS_SUPPORTS_ZBOOT_UART16550 directly. and then sending the relative patches to Ralf. Tested-by: Manuel Lauss <manuel.lauss@googlemail.com> Tested-by: Alexander Clouter <alex@digriz.org.uk> Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-10-14 18:12:16 +08:00
PTR_LA ra, 2f
PTR_LA k0, decompress_kernel
jr k0
nop
2:
move a0, s0
move a1, s1
move a2, s2
move a3, s3
PTR_LI k0, KERNEL_ENTRY
jr k0
nop
3:
b 3b
nop
END(start)
.comm .heap,BOOT_HEAP_SIZE,4
.comm .stack,4096*2,4