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/*
 * linux/arch/arm/kernel/head.S
 *
 * Copyright (C) 1994, 1995, 1996, 1997 Russell King
 *
 * 26-bit kernel startup code
 */
                .text
                .align
                .global __stext
                .global __entry
/*
 * Entry point.
 */
__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       _start_kernel

LC1:            .word   __stext
LC0:            .word   _edata
                .word   _arm_id
                .word   _end
                .word   _init_user_stack + 4096
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