51 lines
998 B
ArmAsm
51 lines
998 B
ArmAsm
/*
|
|
* Startup glue code to uncompress the kernel
|
|
*
|
|
* Copyright IBM Corp. 2010
|
|
*
|
|
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/linkage.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/thread_info.h>
|
|
#include <asm/page.h>
|
|
#include "sizes.h"
|
|
|
|
__HEAD
|
|
ENTRY(startup_continue)
|
|
basr %r13,0 # get base
|
|
.LPG1:
|
|
# setup stack
|
|
l %r15,.Lstack-.LPG1(%r13)
|
|
ahi %r15,-96
|
|
l %r1,.Ldecompress-.LPG1(%r13)
|
|
basr %r14,%r1
|
|
# setup registers for memory mover & branch to target
|
|
lr %r4,%r2
|
|
l %r2,.Loffset-.LPG1(%r13)
|
|
la %r4,0(%r2,%r4)
|
|
l %r3,.Lmvsize-.LPG1(%r13)
|
|
lr %r5,%r3
|
|
# move the memory mover someplace safe
|
|
la %r1,0x200
|
|
mvc 0(mover_end-mover,%r1),mover-.LPG1(%r13)
|
|
# decompress image is started at 0x11000
|
|
lr %r6,%r2
|
|
br %r1
|
|
mover:
|
|
mvcle %r2,%r4,0
|
|
jo mover
|
|
br %r6
|
|
mover_end:
|
|
|
|
.align 8
|
|
.Lstack:
|
|
.long 0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER))
|
|
.Ldecompress:
|
|
.long decompress_kernel
|
|
.Loffset:
|
|
.long 0x11000
|
|
.Lmvsize:
|
|
.long SZ__bss_start
|