[people/ms/u-boot.git] / cpu / mcf532x / start.S

/*
 * Copyright (C) 2003	Josef Baumgartner <josef.baumgartner@telex.de>
 * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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"

#ifndef	 CONFIG_IDENT_STRING
#define	 CONFIG_IDENT_STRING ""
#endif

#define _START	_start
#define _FAULT	_fault

#define SAVE_ALL						\
	move.w	#0x2700,%sr;		/* disable intrs */	\
	subl	#60,%sp;		/* space for 15 regs */ \
	moveml	%d0-%d7/%a0-%a6,%sp@;

#define RESTORE_ALL						\
	moveml	%sp@,%d0-%d7/%a0-%a6;				\
	addl	#60,%sp;		/* space for 15 regs */ \
	rte;

.text
/*
 *	Vector table. This is used for initial platform startup.
 *	These vectors are to catch any un-intended traps.
 */
_vectors:

INITSP:		.long	0x00000000	/* Initial SP	*/
INITPC:		.long	_START	/* Initial PC		*/
vector02:	.long	_FAULT	/* Access Error		*/
vector03:	.long	_FAULT	/* Address Error	*/
vector04:	.long	_FAULT	/* Illegal Instruction	*/
vector05:	.long	_FAULT	/* Reserved		*/
vector06:	.long	_FAULT	/* Reserved		*/
vector07:	.long	_FAULT	/* Reserved		*/
vector08:	.long	_FAULT	/* Privilege Violation	*/
vector09:	.long	_FAULT	/* Trace		*/
vector0A:	.long	_FAULT	/* Unimplemented A-Line	*/
vector0B:	.long	_FAULT	/* Unimplemented F-Line	*/
vector0C:	.long	_FAULT	/* Debug Interrupt	*/
vector0D:	.long	_FAULT	/* Reserved		*/
vector0E:	.long	_FAULT	/* Format Error		*/
vector0F:	.long	_FAULT	/* Unitialized Int.	*/

/* Reserved */
vector10_17:
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT

vector18:	.long	_FAULT	/* Spurious Interrupt	*/
vector19:	.long	_FAULT	/* Autovector Level 1	*/
vector1A:	.long	_FAULT	/* Autovector Level 2	*/
vector1B:	.long	_FAULT	/* Autovector Level 3	*/
vector1C:	.long	_FAULT	/* Autovector Level 4	*/
vector1D:	.long	_FAULT	/* Autovector Level 5	*/
vector1E:	.long	_FAULT	/* Autovector Level 6	*/
vector1F:	.long	_FAULT	/* Autovector Level 7	*/

/* TRAP #0 - #15 */
vector20_2F:
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT

/* Reserved	*/
vector30_3F:
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT

vector64_127:
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT

vector128_191:
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT

vector192_255:
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT

	.text

	.globl	_start
_start:
	nop
	nop
	move.w #0x2700,%sr	/* Mask off Interrupt */

	/* Set vector base register at the beginning of the Flash */
	move.l	#CFG_FLASH_BASE, %d0
	movec	%d0, %VBR

	move.l	#(CFG_INIT_RAM_ADDR + CFG_INIT_RAM_CTRL), %d0
	movec	%d0, %RAMBAR1

	/* invalidate and disable cache */
	move.l	#0x01000000, %d0		/* Invalidate cache cmd */
	movec	%d0, %CACR			/* Invalidate cache */
	move.l	#0, %d0
	movec	%d0, %ACR0
	movec	%d0, %ACR1

	/* initialize general use internal ram */
	move.l #0, %d0
	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a2
	move.l %d0, (%a1)
	move.l %d0, (%a2)

	/* set stackpointer to end of internal ram to get some stackspace for the
	   first c-code */
	move.l	#(CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET), %sp
	clr.l %sp@-

	move.l #__got_start, %a5	/* put relocation table address to a5 */

	bsr cpu_init_f			/* run low-level CPU init code (from flash) */
	bsr board_init_f		/* run low-level board init code (from flash) */

	/* board_init_f() does not return */

/*------------------------------------------------------------------------------*/

/*
 * void relocate_code (addr_sp, gd, addr_moni)
 *
 * This "function" does not return, instead it continues in RAM
 * after relocating the monitor code.
 *
 * r3 = dest
 * r4 = src
 * r5 = length in bytes
 * r6 = cachelinesize
 */
	.globl	relocate_code
relocate_code:
	link.w %a6,#0
	move.l 8(%a6), %sp		/* set new stack pointer */

	move.l 12(%a6), %d0		/* Save copy of Global Data pointer */
	move.l 16(%a6), %a0		/* Save copy of Destination Address */

	move.l #CFG_MONITOR_BASE, %a1
	move.l #__init_end, %a2
	move.l %a0, %a3

	/* copy the code to RAM */
1:
	move.l (%a1)+, (%a3)+
	cmp.l  %a1,%a2
	bgt.s	 1b

/*
 * We are done. Do not return, instead branch to second part of board
 * initialization, now running from RAM.
 */
	move.l	%a0, %a1
	add.l	#(in_ram - CFG_MONITOR_BASE), %a1
	jmp	(%a1)

in_ram:

clear_bss:
	/*
	 * Now clear BSS segment
	 */
	move.l	%a0, %a1
	add.l	#(_sbss - CFG_MONITOR_BASE),%a1
	move.l	%a0, %d1
	add.l	#(_ebss - CFG_MONITOR_BASE),%d1
6:
	clr.l	(%a1)+
	cmp.l	%a1,%d1
	bgt.s	6b

	/*
	 * fix got table in RAM
	 */
	move.l	%a0, %a1
	add.l	#(__got_start - CFG_MONITOR_BASE),%a1
	move.l	%a1,%a5		/* * fix got pointer register a5 */

	move.l	%a0, %a2
	add.l	#(__got_end - CFG_MONITOR_BASE),%a2

7:
	move.l	(%a1),%d1
	sub.l	#_start,%d1
	add.l	%a0,%d1
	move.l	%d1,(%a1)+
	cmp.l	%a2, %a1
	bne	7b

	/* calculate relative jump to board_init_r in ram */
	move.l %a0, %a1
	add.l #(board_init_r - CFG_MONITOR_BASE), %a1

	/* set parameters for board_init_r */
	move.l %a0,-(%sp)		/* dest_addr */
	move.l %d0,-(%sp)		/* gd */
	jsr	(%a1)

/*------------------------------------------------------------------------------*/
/* exception code */
	.globl _fault
_fault:
	jmp _fault
	.globl	_exc_handler

_exc_handler:
	SAVE_ALL
	movel	%sp,%sp@-
	bsr exc_handler
	addql	#4,%sp
	RESTORE_ALL

	.globl	_int_handler
_int_handler:
	SAVE_ALL
	movel	%sp,%sp@-
	bsr int_handler
	addql	#4,%sp
	RESTORE_ALL

/*------------------------------------------------------------------------------*/
/* cache functions */
	.globl	icache_enable
icache_enable:
	move.l	#0x01000000, %d0		/* Invalidate cache cmd */
	movec	%d0, %CACR			/* Invalidate cache */
	move.l	#(CFG_SDRAM_BASE + 0x1c000), %d0
	movec	%d0, %ACR0			/* Enable cache */

	move.l	#0x80000200, %d0		/* Setup cache mask */
	movec	%d0, %CACR			/* Enable cache */
	nop

	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
	moveq	#1, %d0
	move.l	%d0, (%a1)
	rts

	.globl	icache_disable
icache_disable:
	move.l	#0x01000000, %d0		/* Setup cache mask */
	movec	%d0, %CACR			/* Disable cache */
	clr.l	%d0				/* Setup cache mask */
	movec	%d0, %ACR0
	movec	%d0, %ACR1

	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
	moveq	#0, %d0
	move.l	%d0, (%a1)
	rts

	.globl	icache_status
icache_status:
	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
	move.l	(%a1), %d0
	rts

	.globl	icache_invalid
icache_invalid:
	move.l	#0x81000200, %d0		/* Setup cache mask */
	movec	%d0, %CACR			/* Enable cache */
	rts

	.globl	dcache_enable
dcache_enable:
	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1
	moveq	#1, %d0
	move.l	%d0, (%a1)
	rts

    /* No dcache, just a dummy function */
	.globl	dcache_disable
dcache_disable:
	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1
	moveq	#0, %d0
	move.l	%d0, (%a1)
	rts

	.globl	dcache_status
dcache_status:
	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1
	move.l	(%a1), %d0
	rts

/*------------------------------------------------------------------------------*/

	.globl	version_string
version_string:
	.ascii U_BOOT_VERSION
	.ascii " (", __DATE__, " - ", __TIME__, ")"
	.ascii CONFIG_IDENT_STRING, "\0"
	.align 4
Commit	Line	Data
8e585f02 TL	1	/*
	2	* Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de>
	3	* Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <config.h>
	25	#include "version.h"
	26
	27	#ifndef CONFIG_IDENT_STRING
	28	#define CONFIG_IDENT_STRING ""
	29	#endif
	30
	31	#define _START _start
	32	#define _FAULT _fault
	33
8e585f02 TL	34	#define SAVE_ALL \
	35	move.w #0x2700,%sr; /* disable intrs */ \
	36	subl #60,%sp; /* space for 15 regs */ \
	37	moveml %d0-%d7/%a0-%a6,%sp@;
	38
	39	#define RESTORE_ALL \
	40	moveml %sp@,%d0-%d7/%a0-%a6; \
	41	addl #60,%sp; /* space for 15 regs */ \
	42	rte;
	43
8e585f02 TL	44	.text
	45	/*
	46	* Vector table. This is used for initial platform startup.
	47	* These vectors are to catch any un-intended traps.
	48	*/
	49	_vectors:
	50
ddd104f1	51	INITSP: .long 0x00000000 /* Initial SP */
53677ef1	52	INITPC: .long _START /* Initial PC */
ddd104f1 TL	53	vector02: .long _FAULT /* Access Error */
	54	vector03: .long _FAULT /* Address Error */
	55	vector04: .long _FAULT /* Illegal Instruction */
	56	vector05: .long _FAULT /* Reserved */
	57	vector06: .long _FAULT /* Reserved */
	58	vector07: .long _FAULT /* Reserved */
	59	vector08: .long _FAULT /* Privilege Violation */
	60	vector09: .long _FAULT /* Trace */
	61	vector0A: .long _FAULT /* Unimplemented A-Line */
	62	vector0B: .long _FAULT /* Unimplemented F-Line */
	63	vector0C: .long _FAULT /* Debug Interrupt */
	64	vector0D: .long _FAULT /* Reserved */
	65	vector0E: .long _FAULT /* Format Error */
	66	vector0F: .long _FAULT /* Unitialized Int. */
	67
	68	/* Reserved */
8e585f02 TL	69	vector10_17:
	70	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	71
ddd104f1 TL	72	vector18: .long _FAULT /* Spurious Interrupt */
	73	vector19: .long _FAULT /* Autovector Level 1 */
	74	vector1A: .long _FAULT /* Autovector Level 2 */
	75	vector1B: .long _FAULT /* Autovector Level 3 */
	76	vector1C: .long _FAULT /* Autovector Level 4 */
	77	vector1D: .long _FAULT /* Autovector Level 5 */
	78	vector1E: .long _FAULT /* Autovector Level 6 */
	79	vector1F: .long _FAULT /* Autovector Level 7 */
8e585f02 TL	80
	81	/* TRAP #0 - #15 */
	82	vector20_2F:
	83	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	84	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	85
	86	/* Reserved */
	87	vector30_3F:
	88	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	89	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	90
	91	vector64_127:
	92	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	93	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	94	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	95	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	96	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	97	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	98	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	99	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	100
	101	vector128_191:
	102	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	103	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	104	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	105	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	106	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	107	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	108	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	109	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	110
	111	vector192_255:
	112	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	113	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	114	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	115	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	116	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	117	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	118	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	119	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	120
	121	.text
	122
	123	.globl _start
	124	_start:
	125	nop
	126	nop
ddd104f1	127	move.w #0x2700,%sr /* Mask off Interrupt */
8e585f02	128
ddd104f1	129	/* Set vector base register at the beginning of the Flash */
8e585f02 TL	130	move.l #CFG_FLASH_BASE, %d0
	131	movec %d0, %VBR
	132
	133	move.l #(CFG_INIT_RAM_ADDR + CFG_INIT_RAM_CTRL), %d0
c67e12e7	134	movec %d0, %RAMBAR1
8e585f02 TL	135
	136	/* invalidate and disable cache */
	137	move.l #0x01000000, %d0 /* Invalidate cache cmd */
	138	movec %d0, %CACR /* Invalidate cache */
	139	move.l #0, %d0
	140	movec %d0, %ACR0
	141	movec %d0, %ACR1
	142
	143	/* initialize general use internal ram */
	144	move.l #0, %d0
	145	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
	146	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a2
	147	move.l %d0, (%a1)
	148	move.l %d0, (%a2)
	149
ddd104f1 TL	150	/* set stackpointer to end of internal ram to get some stackspace for the
ddd104f1 TL	151	first c-code */
8e585f02 TL	152	move.l #(CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET), %sp
	153	clr.l %sp@-
	154
ddd104f1	155	move.l #__got_start, %a5 /* put relocation table address to a5 */
8e585f02	156
ddd104f1 TL	157	bsr cpu_init_f /* run low-level CPU init code (from flash) */
ddd104f1 TL	158	bsr board_init_f /* run low-level board init code (from flash) */
8e585f02 TL	159
	160	/* board_init_f() does not return */
	161
	162	/------------------------------------------------------------------------------/
	163
	164	/*
	165	* void relocate_code (addr_sp, gd, addr_moni)
	166	*
	167	* This "function" does not return, instead it continues in RAM
	168	* after relocating the monitor code.
	169	*
	170	* r3 = dest
	171	* r4 = src
	172	* r5 = length in bytes
	173	* r6 = cachelinesize
	174	*/
	175	.globl relocate_code
	176	relocate_code:
	177	link.w %a6,#0
	178	move.l 8(%a6), %sp /* set new stack pointer */
	179
	180	move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
	181	move.l 16(%a6), %a0 /* Save copy of Destination Address */
	182
	183	move.l #CFG_MONITOR_BASE, %a1
	184	move.l #__init_end, %a2
	185	move.l %a0, %a3
	186
	187	/* copy the code to RAM */
	188	1:
	189	move.l (%a1)+, (%a3)+
	190	cmp.l %a1,%a2
	191	bgt.s 1b
	192
	193	/*
	194	* We are done. Do not return, instead branch to second part of board
	195	* initialization, now running from RAM.
	196	*/
	197	move.l %a0, %a1
	198	add.l #(in_ram - CFG_MONITOR_BASE), %a1
	199	jmp (%a1)
	200
	201	in_ram:
	202
	203	clear_bss:
	204	/*
	205	* Now clear BSS segment
	206	*/
	207	move.l %a0, %a1
	208	add.l #(_sbss - CFG_MONITOR_BASE),%a1
	209	move.l %a0, %d1
	210	add.l #(_ebss - CFG_MONITOR_BASE),%d1
	211	6:
	212	clr.l (%a1)+
	213	cmp.l %a1,%d1
	214	bgt.s 6b
	215
	216	/*
	217	* fix got table in RAM
	218	*/
	219	move.l %a0, %a1
	220	add.l #(__got_start - CFG_MONITOR_BASE),%a1
	221	move.l %a1,%a5 /* * fix got pointer register a5 */
	222
223	move.l %a0, %a2
224	add.l #(__got_end - CFG_MONITOR_BASE),%a2
225
226	7:
227	move.l (%a1),%d1
228	sub.l #_start,%d1
229	add.l %a0,%d1
230	move.l %d1,(%a1)+
231	cmp.l %a2, %a1
232	bne 7b
233
234	/* calculate relative jump to board_init_r in ram */
235	move.l %a0, %a1
236	add.l #(board_init_r - CFG_MONITOR_BASE), %a1
237
238	/* set parameters for board_init_r */
239	move.l %a0,-(%sp) /* dest_addr */
240	move.l %d0,-(%sp) /* gd */
241	jsr (%a1)
242
243	/------------------------------------------------------------------------------/
244	/* exception code */
245	.globl _fault
246	_fault:
247	jmp _fault
248	.globl _exc_handler
249
250	_exc_handler:
251	SAVE_ALL
252	movel %sp,%sp@-
253	bsr exc_handler
254	addql #4,%sp
255	RESTORE_ALL
256
257	.globl _int_handler
258	_int_handler:
259	SAVE_ALL
260	movel %sp,%sp@-
261	bsr int_handler
262	addql #4,%sp
263	RESTORE_ALL
264
265	/------------------------------------------------------------------------------/
266	/* cache functions */
267	.globl icache_enable
268	icache_enable:
269	move.l #0x01000000, %d0 /* Invalidate cache cmd */
270	movec %d0, %CACR /* Invalidate cache */
c67e12e7	271	move.l #(CFG_SDRAM_BASE + 0x1c000), %d0
8e585f02	272	movec %d0, %ACR0 /* Enable cache */
8e585f02	273
ddd104f1	274	move.l #0x80000200, %d0 /* Setup cache mask */
8e585f02	275	movec %d0, %CACR /* Enable cache */
ddd104f1	276	nop
8e585f02 TL	277
	278	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
	279	moveq #1, %d0
	280	move.l %d0, (%a1)
	281	rts
	282
	283	.globl icache_disable
	284	icache_disable:
0dca874d T	285	move.l #0x01000000, %d0 /* Setup cache mask */
0dca874d T	286	movec %d0, %CACR /* Disable cache */
8e585f02	287	clr.l %d0 /* Setup cache mask */
0dca874d T	288	movec %d0, %ACR0
0dca874d T	289	movec %d0, %ACR1
8e585f02 TL	290
	291	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
	292	moveq #0, %d0
	293	move.l %d0, (%a1)
	294	rts
	295
	296	.globl icache_status
	297	icache_status:
	298	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
	299	move.l (%a1), %d0
	300	rts
	301
	302	.globl icache_invalid
	303	icache_invalid:
0dca874d	304	move.l #0x81000200, %d0 /* Setup cache mask */
8e585f02 TL	305	movec %d0, %CACR /* Enable cache */
	306	rts
	307
	308	.globl dcache_enable
	309	dcache_enable:
	310	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1
	311	moveq #1, %d0
	312	move.l %d0, (%a1)
	313	rts
	314
	315	/* No dcache, just a dummy function */
	316	.globl dcache_disable
	317	dcache_disable:
	318	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1
	319	moveq #0, %d0
	320	move.l %d0, (%a1)
	321	rts
	322
	323	.globl dcache_status
	324	dcache_status:
	325	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1
	326	move.l (%a1), %d0
	327	rts
	328
	329	/------------------------------------------------------------------------------/
	330
	331	.globl version_string
	332	version_string:
	333	.ascii U_BOOT_VERSION
	334	.ascii " (", __DATE__, " - ", __TIME__, ")"
	335	.ascii CONFIG_IDENT_STRING, "\0"
9b46432f	336	.align 4