mirror of
git://projects.qi-hardware.com/xburst-tools.git
synced 2024-11-23 00:07:31 +02:00
51 lines
1.0 KiB
ArmAsm
51 lines
1.0 KiB
ArmAsm
/*
|
|
* head.S
|
|
*
|
|
* Entry of n-boot
|
|
*
|
|
* Copyright (c) 2005-2008 Ingenic Semiconductor Inc.
|
|
* Author: <jlwei@ingenic.cn>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*/
|
|
#include <config.h>
|
|
#ifdef CONFIG_JZ4740
|
|
#include <jz4740.h>
|
|
#include <jz4740_board.h>
|
|
#endif
|
|
|
|
.text
|
|
.set noreorder
|
|
.global startup
|
|
startup:
|
|
#ifdef CONFIG_JZ4740
|
|
.word JZ4740_NANDBOOT_CFG /* fetched by CPU during NAND Boot */
|
|
#endif
|
|
/*
|
|
* Disable all interrupts
|
|
*/
|
|
la $8, 0xB0001004 /* INTC_IMR */
|
|
li $9, 0xffffffff
|
|
sw $9, 0($8)
|
|
|
|
/*
|
|
* CU0=UM=EXL=IE=0, BEV=ERL=1, IP2~7=1
|
|
*/
|
|
li $26, 0x0040FC04
|
|
mtc0 $26, $12 /* CP0_STATUS */
|
|
|
|
/* IV=1, use the specical interrupt vector (0x200) */
|
|
li $26, 0x00800000
|
|
mtc0 $26, $13 /* CP0_CAUSE */
|
|
|
|
/* Setup stack pointer */
|
|
la $29, 0x80004000
|
|
|
|
/* Jump to the nand boot routine */
|
|
j nand_boot
|
|
nop
|
|
.set reorder
|