head.s

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/*
 *  head.S
 *
 *  Copyright (C) 2001-2002 Hayden Luo
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  32-bit startup code for s3c5410b board
 */
#include "board.h"

	.globl stext
	.globl safe_table_offset
	.globl bios_table_offset
	.globl _rom_base

.section ".text"

stext:
	b	__init_entry

_rom_base:
	.long   stext

__init_entry:
	ldr	pc, =__entry

__entry:
/*
 * Load up the linker defined values for the static data copy
*/
	ldr	r0, =_etext
	ldr	r1, =__data_start
	ldr	r3, =_edata


/*
 * Stop on CS (ie R1 becomes >= R3).
*/
0:	cmp	r1, r3
	ldrcc	r2, [r0], #4
	strcc	r2, [r1], #4
	bcc	0b 


/*
 * Clear remainder of data to _end to 0
 */
1:
  ldr	r1, =_end
	mov	r2, #0
2:	cmp	r3, r1
	strcc	r2, [r3], #4
	bcc	2b


/* 
 * Now set up the BSPs SVC stack
 */
	mrs	r0, cpsr
	bic	r0, r0, #PSR_MODE_MASK
	orr	r1, r0, #PSR_SVC_MODE
	msr	cpsr, r1
	
	mov r4, sp
	ldr	sp, =__stack 

bios_start:
	stmfd sp!, {r4, lr}
	//bl	m1_main
	ldr lr, =ret
	ldr pc, =m1_main
ret:
  ldmfd sp!, {sp, pc}

here:
	b	here		/* program stop here */


.globl getsp
getsp:
	mov r0, sp
	mov pc, lr

.globl getpc
getpc:
	mov r0, lr
	mov pc, lr


	.align
	.section ".bss"