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/*
* linux/arch/arm/kernel/head.S
*
* Copyright (C) 1994, 1995, 1996, 1997 Russell King
*
* 26-bit kernel startup code
*/
#include <linux/linkage.h>
.text
.align
/*
* Entry point.
*/
ENTRY(stext)
ENTRY(_stext)
__entry: cmp pc, #0x02000000
ldrlt pc, LC1 @ if 0x01800000, call at 0x02080000
teq r0, #0 @ Check for old calling method
blne Loldparams @ Move page if old
adr r5, LC0
ldmia r5, {r5, r6, sl, sp} @ Setup stack
mov r4, #0
1: cmp r5, sl @ Clear BSS
strcc r4, [r5], #4
bcc 1b
mov r0, #0xea000000 @ Point undef instr to continuation
adr r5, Lcontinue - 12
orr r5, r0, r5, lsr #2
str r5, [r4, #4]
mov r2, r4
ldr r5, Larm2_id
swp r0, r0, [r2] @ check for swp (ARM2 can't)
ldr r5, Larm250_id
mrc 15, 0, r0, c0, c0 @ check for CP#15 (ARM250 can't)
mov r5, r0 @ Use processor ID if we do have CP#15
Lcontinue: str r5, [r6]
mov r5, #0xeb000000 @ Point undef instr vector to itself
sub r5, r5, #2
str r5, [r4, #4]
mov fp, #0
b SYMBOL_NAME(start_kernel)
LC1: .word SYMBOL_NAME(_stext)
LC0: .word SYMBOL_NAME(__bss_start)
.word SYMBOL_NAME(processor_id)
.word SYMBOL_NAME(_end)
.word SYMBOL_NAME(init_task_union)+8192
Larm2_id: .long 0x41560200
Larm250_id: .long 0x41560250
.align
Loldparams: mov r4, #0x02000000
add r3, r4, #0x00080000
add r4, r4, #0x0007c000
1: ldmia r0!, {r5 - r12}
stmia r4!, {r5 - r12}
cmp r4, r3
blt 1b
movs pc, lr
.align 13
ENTRY(this_must_match_init_task)
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