boot.s

bootloader_test

/* 
 *Boot Loader, boot.S
 */
	.equ	WTCON,		0x01d30000
	.equ 	WTCON,		0x01d30000
	.equ 	PCONE,		0x01d20028
	.equ 	LOCKTIME, 	0x01d8000c
	.equ 	PLLCON,		0x01d80000
	.equ 	CLKCON,		0x01d80004

.globl _start
_start:	
	b	reset
	add	pc, pc, #0x0c000000
	add	pc, pc, #0x0c000000
	add	pc, pc, #0x0c000000
	add	pc, pc, #0x0c000000
	add	pc, pc, #0x0c000000
	add	pc, pc, #0x0c000000
	add	pc, pc, #0x0c000000

MEMORY_CONFIG:
	.long	0x11110102
	.long	0x600
	.long	0x7ffc
	.long	0x7ffc
	.long	0x7ffc
	.long	0x7ffc
	.long	0x7ffc
	.long	0x18000
	.long	0x18000
	.long	0x860459
	.long	0x10
	.long	0x20
	.long	0x20	

/*************************************************/
	/* the actual reset code */
reset:
	/* disable watch dog */
	ldr 	r0, =WTCON
	ldr	r1, =0x0
	str	r1, [r0]
/*************************************************/
	/* Config Port E */
	ldr	r1, =PCONE
	ldr	r0, =0x15529
	str	r0, [r1]
/*************************************************/
	/* Set Clock Control Register */
	ldr	r1, =LOCKTIME
	ldrb	r0, =0xfff
	strb	r0, [r1]

	ldr	r1, =PLLCON
	ldr	r0, =0x78061
	str	r0, [r1]

	ldr	r1,=CLKCON
	ldr	r0, =0x7ff8
	str	r0, [r1]
/*************************************************/
	/* setup memory */
memsetup:
	ldr	r0, =MEMORY_CONFIG
	ldmia	r0, {r1-r13}
	ldr 	r0, =0x01c80000
	stmia	r0, {r1-r13}
/*************************************************/
	/* copy kernel to ram */
	ldr r0,	=0x10000
	ldr r1,	=0xc300000
	add r2,	r0,	#(704 * 1024)
copy_kernel:	
	ldmia	r0!, {r3-r10}
	stmia	r1!, {r3-r10}
	cmp	r0,	r2
	ble	copy_kernel
/*************************************************/
	/* kernel is copied to ram, so jump to it */
	ldr	r0,	=0xc300000
	mov	pc,	r0