[u-boot.git] / cpu / mcf547x_8x / start.S

/*
 * Copyright (C) 2003	Josef Baumgartner <[email protected]>
 * Based on code from Bernhard Kuhn <[email protected]>
 *
 * 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

/* last three long word reserved for cache status */
#define ICACHE_STATUS	(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END- 4)
#define DCACHE_STATUS	(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END- 8)
#define CACR_STATUS	(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-12)

#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, %RAMBAR0

	move.l	#(CFG_INIT_RAM1_ADDR + CFG_INIT_RAM1_CTRL), %d0
	movec	%d0, %RAMBAR1

	move.l	#CFG_MBAR, %d0		/* set MBAR address */
	move.c	%d0, %MBAR

	/* invalidate and disable cache */
	move.l	#0x01040100, %d0	/* Invalidate cache cmd */
	movec	%d0, %CACR		/* Invalidate cache */
	move.l	#0, %d0
	movec	%d0, %ACR0
	movec	%d0, %ACR1
	movec	%d0, %ACR2
	movec	%d0, %ACR3

	/* initialize general use internal ram */
	move.l #0, %d0
	move.l #(ICACHE_STATUS), %a1	/* icache */
	move.l #(DCACHE_STATUS), %a2	/* icache */
	move.l #(CACR_STATUS), %a3	/* CACR */
	move.l %d0, (%a1)
	move.l %d0, (%a2)
	move.l %d0, (%a3)

	/* 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	#(CFG_SDRAM_BASE + 0x1c000), %d0
	movec	%d0, %ACR2			/* Enable cache */

	move.l	#0x020C8100, %d0		/* Setup cache mask */
	movec	%d0, %CACR			/* Enable cache */
	nop

	move.l #(ICACHE_STATUS), %a1
	moveq	#1, %d0
	move.l	%d0, (%a1)
	rts

	.globl	icache_disable
icache_disable:
	move.l	#0x000C8100, %d0		/* Setup cache mask */
	movec	%d0, %CACR			/* Disable cache */
	clr.l	%d0				/* Setup cache mask */
	movec	%d0, %ACR2
	movec	%d0, %ACR3

	move.l #(ICACHE_STATUS), %a1
	moveq	#0, %d0
	move.l	%d0, (%a1)
	rts

	.globl	icache_invalid
icache_invalid:
	move.l	#0x000C8100, %d0		/* Setup cache mask */
	movec	%d0, %CACR			/* Enable cache */
	rts

	.globl	icache_status
icache_status:
	move.l #(ICACHE_STATUS), %a1
	move.l	(%a1), %d0
	rts

	.globl	dcache_enable
dcache_enable:
	bsr	icache_disable

	move.l	#(CFG_SDRAM_BASE + 0xc000), %d0
	movec	%d0, %ACR0			/* Enable cache */

	move.l	#0xA30C8100, %d0		/* Invalidate cache cmd */
	movec	%d0, %CACR			/* Invalidate cache */

	move.l #(DCACHE_STATUS), %a1
	moveq	#1, %d0
	move.l	%d0, (%a1)
	rts

	.globl	dcache_disable
dcache_disable:
	move.l	#0xA30C8100, %d0		/* Setup cache mask */
	movec	%d0, %CACR			/* Disable cache */
	clr.l	%d0				/* Setup cache mask */
	movec	%d0, %ACR0
	movec	%d0, %ACR1

	move.l #(DCACHE_STATUS), %a1
	moveq	#0, %d0
	move.l	%d0, (%a1)
	rts

	.globl	dcache_status
dcache_status:
	move.l #(DCACHE_STATUS), %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
570c0186 TL	1	/*
	2	* Copyright (C) 2003 Josef Baumgartner <[email protected]>
	3	* Based on code from Bernhard Kuhn <[email protected]>
	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	/* last three long word reserved for cache status */
	32	#define ICACHE_STATUS (CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END- 4)
	33	#define DCACHE_STATUS (CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END- 8)
	34	#define CACR_STATUS (CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-12)
	35
	36	#define _START _start
	37	#define _FAULT _fault
	38
	39	#define SAVE_ALL \
	40	move.w #0x2700,%sr; /* disable intrs */ \
	41	subl #60,%sp; /* space for 15 regs */ \
	42	moveml %d0-%d7/%a0-%a6,%sp@;
	43
	44	#define RESTORE_ALL \
	45	moveml %sp@,%d0-%d7/%a0-%a6; \
	46	addl #60,%sp; /* space for 15 regs */ \
	47	rte;
	48
	49	.text
	50	/*
	51	* Vector table. This is used for initial platform startup.
	52	* These vectors are to catch any un-intended traps.
	53	*/
	54	_vectors:
	55
	56	INITSP: .long 0x00000000 /* Initial SP */
53677ef1	57	INITPC: .long _START /* Initial PC */
570c0186 TL	58	vector02: .long _FAULT /* Access Error */
	59	vector03: .long _FAULT /* Address Error */
	60	vector04: .long _FAULT /* Illegal Instruction */
	61	vector05: .long _FAULT /* Reserved */
	62	vector06: .long _FAULT /* Reserved */
	63	vector07: .long _FAULT /* Reserved */
	64	vector08: .long _FAULT /* Privilege Violation */
	65	vector09: .long _FAULT /* Trace */
	66	vector0A: .long _FAULT /* Unimplemented A-Line */
	67	vector0B: .long _FAULT /* Unimplemented F-Line */
	68	vector0C: .long _FAULT /* Debug Interrupt */
	69	vector0D: .long _FAULT /* Reserved */
	70	vector0E: .long _FAULT /* Format Error */
	71	vector0F: .long _FAULT /* Unitialized Int. */
	72
	73	/* Reserved */
	74	vector10_17:
	75	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	76
	77	vector18: .long _FAULT /* Spurious Interrupt */
	78	vector19: .long _FAULT /* Autovector Level 1 */
	79	vector1A: .long _FAULT /* Autovector Level 2 */
	80	vector1B: .long _FAULT /* Autovector Level 3 */
	81	vector1C: .long _FAULT /* Autovector Level 4 */
	82	vector1D: .long _FAULT /* Autovector Level 5 */
	83	vector1E: .long _FAULT /* Autovector Level 6 */
	84	vector1F: .long _FAULT /* Autovector Level 7 */
	85
	86	/* TRAP #0 - #15 */
	87	vector20_2F:
	88	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	89	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	90
	91	/* Reserved */
	92	vector30_3F:
	93	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	94	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	95
	96	vector64_127:
	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	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	101	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	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
	106	vector128_191:
	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	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	111	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	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
	116	vector192_255:
	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	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
	121	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
122	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
123	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
124	.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
125
126	.text
127
128	.globl _start
129	_start:
130	nop
131	nop
132	move.w #0x2700,%sr /* Mask off Interrupt */
133
134	/* Set vector base register at the beginning of the Flash */
135	move.l #CFG_FLASH_BASE, %d0
136	movec %d0, %VBR
137
138	move.l #(CFG_INIT_RAM_ADDR + CFG_INIT_RAM_CTRL), %d0
139	movec %d0, %RAMBAR0
140
141	move.l #(CFG_INIT_RAM1_ADDR + CFG_INIT_RAM1_CTRL), %d0
142	movec %d0, %RAMBAR1
143
144	move.l #CFG_MBAR, %d0 /* set MBAR address */
145	move.c %d0, %MBAR
146
147	/* invalidate and disable cache */
148	move.l #0x01040100, %d0 /* Invalidate cache cmd */
149	movec %d0, %CACR /* Invalidate cache */
150	move.l #0, %d0
151	movec %d0, %ACR0
152	movec %d0, %ACR1
153	movec %d0, %ACR2
154	movec %d0, %ACR3
155
156	/* initialize general use internal ram */
157	move.l #0, %d0
158	move.l #(ICACHE_STATUS), %a1 /* icache */
159	move.l #(DCACHE_STATUS), %a2 /* icache */
160	move.l #(CACR_STATUS), %a3 /* CACR */
161	move.l %d0, (%a1)
162	move.l %d0, (%a2)
163	move.l %d0, (%a3)
164
165	/* set stackpointer to end of internal ram to get some stackspace for the
166	first c-code */
167	move.l #(CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET), %sp
168	clr.l %sp@-
169
170	move.l #__got_start, %a5 /* put relocation table address to a5 */
171
172	bsr cpu_init_f /* run low-level CPU init code (from flash) */
173	bsr board_init_f /* run low-level board init code (from flash) */
174
175	/* board_init_f() does not return */
176
177	/------------------------------------------------------------------------------/
178
179	/*
180	* void relocate_code (addr_sp, gd, addr_moni)
181	*
182	* This "function" does not return, instead it continues in RAM
183	* after relocating the monitor code.
184	*
185	* r3 = dest
186	* r4 = src
187	* r5 = length in bytes
188	* r6 = cachelinesize
189	*/
190	.globl relocate_code
191	relocate_code:
192	link.w %a6,#0
193	move.l 8(%a6), %sp /* set new stack pointer */
194
195	move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
196	move.l 16(%a6), %a0 /* Save copy of Destination Address */
197
198	move.l #CFG_MONITOR_BASE, %a1
199	move.l #__init_end, %a2
200	move.l %a0, %a3
201
202	/* copy the code to RAM */
203	1:
204	move.l (%a1)+, (%a3)+
205	cmp.l %a1,%a2
206	bgt.s 1b
207
208	/*
209	* We are done. Do not return, instead branch to second part of board
210	* initialization, now running from RAM.
211	*/
212	move.l %a0, %a1
213	add.l #(in_ram - CFG_MONITOR_BASE), %a1
214	jmp (%a1)
215
216	in_ram:
217
218	clear_bss:
219	/*
220	* Now clear BSS segment
221	*/
222	move.l %a0, %a1
223	add.l #(_sbss - CFG_MONITOR_BASE),%a1
224	move.l %a0, %d1
225	add.l #(_ebss - CFG_MONITOR_BASE),%d1
226	6:
227	clr.l (%a1)+
228	cmp.l %a1,%d1
229	bgt.s 6b
230
231	/*
232	* fix got table in RAM
233	*/
234	move.l %a0, %a1
235	add.l #(__got_start - CFG_MONITOR_BASE),%a1
236	move.l %a1,%a5 /* * fix got pointer register a5 */
237
238	move.l %a0, %a2
239	add.l #(__got_end - CFG_MONITOR_BASE),%a2
240
241	7:
242	move.l (%a1),%d1
243	sub.l #_start,%d1
244	add.l %a0,%d1
245	move.l %d1,(%a1)+
246	cmp.l %a2, %a1
247	bne 7b
248
249	/* calculate relative jump to board_init_r in ram */
250	move.l %a0, %a1
251	add.l #(board_init_r - CFG_MONITOR_BASE), %a1
252
253	/* set parameters for board_init_r */
254	move.l %a0,-(%sp) /* dest_addr */
255	move.l %d0,-(%sp) /* gd */
256	jsr (%a1)
257
258	/------------------------------------------------------------------------------/
259	/* exception code */
260	.globl _fault
261	_fault:
262	jmp _fault
263	.globl _exc_handler
264
265	_exc_handler:
266	SAVE_ALL
267	movel %sp,%sp@-
268	bsr exc_handler
269	addql #4,%sp
270	RESTORE_ALL
271
272	.globl _int_handler
273	_int_handler:
274	SAVE_ALL
275	movel %sp,%sp@-
276	bsr int_handler
277	addql #4,%sp
278	RESTORE_ALL
279
280	/------------------------------------------------------------------------------/
281	/* cache functions */
282	.globl icache_enable
283	icache_enable:
284	move.l #(CFG_SDRAM_BASE + 0x1c000), %d0
285	movec %d0, %ACR2 /* Enable cache */
286
287	move.l #0x020C8100, %d0 /* Setup cache mask */
288	movec %d0, %CACR /* Enable cache */
289	nop
290
291	move.l #(ICACHE_STATUS), %a1
292	moveq #1, %d0
293	move.l %d0, (%a1)
294	rts
295
296	.globl icache_disable
297	icache_disable:
298	move.l #0x000C8100, %d0 /* Setup cache mask */
299	movec %d0, %CACR /* Disable cache */
300	clr.l %d0 /* Setup cache mask */
301	movec %d0, %ACR2
302	movec %d0, %ACR3
303
304	move.l #(ICACHE_STATUS), %a1
305	moveq #0, %d0
306	move.l %d0, (%a1)
307	rts
308
309	.globl icache_invalid
310	icache_invalid:
311	move.l #0x000C8100, %d0 /* Setup cache mask */
312	movec %d0, %CACR /* Enable cache */
313	rts
314
315	.globl icache_status
316	icache_status:
317	move.l #(ICACHE_STATUS), %a1
318	move.l (%a1), %d0
319	rts
320
321	.globl dcache_enable
322	dcache_enable:
323	bsr icache_disable
324
325	move.l #(CFG_SDRAM_BASE + 0xc000), %d0
326	movec %d0, %ACR0 /* Enable cache */
327
328	move.l #0xA30C8100, %d0 /* Invalidate cache cmd */
329	movec %d0, %CACR /* Invalidate cache */
330
331	move.l #(DCACHE_STATUS), %a1
332	moveq #1, %d0
333	move.l %d0, (%a1)
334	rts
335
336	.globl dcache_disable
337	dcache_disable:
338	move.l #0xA30C8100, %d0 /* Setup cache mask */
339	movec %d0, %CACR /* Disable cache */
340	clr.l %d0 /* Setup cache mask */
341	movec %d0, %ACR0
342	movec %d0, %ACR1
343
344	move.l #(DCACHE_STATUS), %a1
345	moveq #0, %d0
346	move.l %d0, (%a1)
347	rts
348
349	.globl dcache_status
350	dcache_status:
351	move.l #(DCACHE_STATUS), %a1
352	move.l (%a1), %d0
353	rts
354
355	/------------------------------------------------------------------------------/
356
357	.globl version_string
358	version_string:
359	.ascii U_BOOT_VERSION
360	.ascii " (", __DATE__, " - ", __TIME__, ")"
361	.ascii CONFIG_IDENT_STRING, "\0"
9b46432f	362	.align 4