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/*
* linux/arch/sh/boot/compressed/head.S
*
* Copyright (C) 1999 Stuart Menefy
*/
.text
#include <linux/linkage.h>
.global startup
startup:
/* Load initial status register */
mov.l init_sr, r1
ldc r1, sr
/* First clear BSS */
mov.l end_addr, r1
mov.l bss_start_addr, r2
mov #0, r0
l1:
mov.l r0, @-r1
cmp/eq r1,r2
bf l1
/* Set the initial pointer. */
mov.l init_stack_addr, r0
mov.l @r0, r15
/* Decompress the kernel */
mov.l decompress_kernel_addr, r0
jsr @r0
nop
/* Jump to the start of the decompressed kernel */
mov.l kernel_start_addr, r0
jmp @r0
nop
.align 2
bss_start_addr:
.long __bss_start
end_addr:
.long _end
init_sr:
.long 0x400000F0 /* Privileged mode, Bank=0, Block=0, IMASK=0xF */
init_stack_addr:
.long stack_start
decompress_kernel_addr:
.long decompress_kernel
kernel_start_addr:
.long _text+0x1000
.align 9
fake_headers_as_bzImage:
.word 0
.ascii "HdrS" ! header signature
.word 0x0202 ! header version number (>= 0x0105)
! or else old loadlin-1.5 will fail)
.word 0 ! default_switch
.word 0 ! SETUPSEG
.word 0x1000
.word 0 ! pointing to kernel version string
.byte 0 ! = 0, old one (LILO, Loadlin,
! 0xTV: T=0 for LILO
! V = version
.byte 1 ! Load flags bzImage=1
.word 0x8000 ! size to move, when setup is not
.long 0x100000 ! 0x100000 = default for big kernel
.long 0 ! address of loaded ramdisk image
.long 0 # its size in bytes
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