[people/ms/u-boot.git] / board / lpc2292sodimm / lowlevel_init.S

/*
 * (C) Copyright 2006 Embedded Artists AB <www.embeddedartists.com>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <config.h>
#include <version.h>
#include <asm/arch/hardware.h>

/* some parameters for the board */
/* setting up the memory */
#define	SRAM_START	0x40000000
#define	SRAM_SIZE	0x00004000
#define BCFG0_VALUE	0x1000ffef
#define BCFG1_VALUE	0x10001C61

_TEXT_BASE:
	.word	TEXT_BASE
MEMMAP_ADR:
	.word	MEMMAP
BCFG0_ADR:
	.word	BCFG0
_BCFG0_VALUE:
	.word	BCFG0_VALUE
BCFG1_ADR:
	.word	BCFG1
_BCFG1_VALUE:
	.word	BCFG1_VALUE
PINSEL2_ADR:
	.word	PINSEL2
PINSEL2_MASK:
	.word	0x00000000
PINSEL2_VALUE:
	.word	0x0F800914

.extern _start

.globl lowlevel_init
lowlevel_init:
	/* set up memory control register for bank 0 */
	ldr r0, _BCFG0_VALUE
	ldr r1, BCFG0_ADR
	str r0, [r1]

	/* set up memory control register for bank 1 */
	ldr	r0, _BCFG1_VALUE
	ldr	r1, BCFG1_ADR
	str	r0, [r1]

	/* set up PINSEL2 for bus-pins */
	ldr	r0, PINSEL2_ADR
	ldr	r1, [r0]
	ldr	r2, PINSEL2_MASK
	ldr	r3, PINSEL2_VALUE
	and	r1, r1, r2
	orr	r1, r1, r3
	str	r1, [r0]

	/* move vectors to beginning of SRAM */
	mov	r2, #SRAM_START
	mov	r0, #0 /*_start*/
	ldmneia r0!, {r3-r10}
	stmneia r2!, {r3-r10}
	ldmneia r0, {r3-r9}
	stmneia r2, {r3-r9}

	/* Set-up MEMMAP register, so vectors are taken from SRAM */
	ldr	r0, MEMMAP_ADR
	mov	r1, #0x02	/* vectors re-mapped to static RAM */
	str	r1, [r0]

	/* everything is fine now */
	mov	pc, lr
Commit	Line	Data
6bd2447e GJ	1	/*
	2	* (C) Copyright 2006 Embedded Artists AB <www.embeddedartists.com>
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License as
	6	* published by the Free Software Foundation; either version 2 of
	7	* the License, or (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	17	* MA 02111-1307 USA
	18	*/
	19
	20	#include <config.h>
	21	#include <version.h>
	22	#include <asm/arch/hardware.h>
	23
	24	/* some parameters for the board */
	25	/* setting up the memory */
53677ef1 WD	26	#define SRAM_START 0x40000000
	27	#define SRAM_SIZE 0x00004000
	28	#define BCFG0_VALUE 0x1000ffef
	29	#define BCFG1_VALUE 0x10001C61
f8db84f1	30
6bd2447e GJ	31	_TEXT_BASE:
6bd2447e GJ	32	.word TEXT_BASE
f8db84f1	33	MEMMAP_ADR:
6bd2447e GJ	34	.word MEMMAP
6bd2447e GJ	35	BCFG0_ADR:
53677ef1	36	.word BCFG0
6bd2447e	37	_BCFG0_VALUE:
53677ef1	38	.word BCFG0_VALUE
6bd2447e GJ	39	BCFG1_ADR:
	40	.word BCFG1
	41	_BCFG1_VALUE:
	42	.word BCFG1_VALUE
	43	PINSEL2_ADR:
	44	.word PINSEL2
	45	PINSEL2_MASK:
	46	.word 0x00000000
	47	PINSEL2_VALUE:
	48	.word 0x0F800914
	49
	50	.extern _start
	51
	52	.globl lowlevel_init
	53	lowlevel_init:
	54	/* set up memory control register for bank 0 */
	55	ldr r0, _BCFG0_VALUE
	56	ldr r1, BCFG0_ADR
	57	str r0, [r1]
	58
	59	/* set up memory control register for bank 1 */
	60	ldr r0, _BCFG1_VALUE
	61	ldr r1, BCFG1_ADR
	62	str r0, [r1]
	63
	64	/* set up PINSEL2 for bus-pins */
	65	ldr r0, PINSEL2_ADR
	66	ldr r1, [r0]
	67	ldr r2, PINSEL2_MASK
	68	ldr r3, PINSEL2_VALUE
	69	and r1, r1, r2
	70	orr r1, r1, r3
	71	str r1, [r0]
f8db84f1	72
6bd2447e	73	/* move vectors to beginning of SRAM */
f8db84f1	74	mov r2, #SRAM_START
6bd2447e	75	mov r0, #0 /_start/
f8db84f1 WD	76	ldmneia r0!, {r3-r10}
f8db84f1 WD	77	stmneia r2!, {r3-r10}
6bd2447e GJ	78	ldmneia r0, {r3-r9}
	79	stmneia r2, {r3-r9}
	80
f8db84f1	81	/* Set-up MEMMAP register, so vectors are taken from SRAM */
6bd2447e GJ	82	ldr r0, MEMMAP_ADR
	83	mov r1, #0x02 /* vectors re-mapped to static RAM */
	84	str r1, [r0]
f8db84f1	85
6bd2447e GJ	86	/* everything is fine now */
6bd2447e GJ	87	mov pc, lr