xref: /openbmc/u-boot/arch/m68k/cpu/mcf5445x/start.S (revision ef64e782) 
1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * Copyright (C) 2003	Josef Baumgartner <josef.baumgartner@telex.de>
4 * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
5 *
6 * Copyright 2010-2012 Freescale Semiconductor, Inc.
7 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
8 */
9
10#include <common.h>
11#include <asm-offsets.h>
12#include <config.h>
13#include <timestamp.h>
14#include "version.h"
15#include <asm/cache.h>
16
17#define _START	_start
18#define _FAULT	_fault
19
20#define SAVE_ALL						\
21	move.w	#0x2700,%sr;		/* disable intrs */	\
22	subl	#60,%sp;		/* space for 15 regs */ \
23	moveml	%d0-%d7/%a0-%a6,%sp@;
24
25#define RESTORE_ALL						\
26	moveml	%sp@,%d0-%d7/%a0-%a6;				\
27	addl	#60,%sp;		/* space for 15 regs */ \
28	rte;
29
30#if defined(CONFIG_SERIAL_BOOT)
31#define ASM_DRAMINIT	(asm_dram_init - CONFIG_SYS_TEXT_BASE + \
32	CONFIG_SYS_INIT_RAM_ADDR)
33#define ASM_DRAMINIT_N	(asm_dram_init - CONFIG_SYS_TEXT_BASE)
34#define ASM_SBF_IMG_HDR	(asm_sbf_img_hdr - CONFIG_SYS_TEXT_BASE + \
35	CONFIG_SYS_INIT_RAM_ADDR)
36#endif
37
38.text
39
40/*
41 * Vector table. This is used for initial platform startup.
42 * These vectors are to catch any un-intended traps.
43 */
44_vectors:
45#if defined(CONFIG_SERIAL_BOOT)
46
47INITSP:	.long	0			/* Initial SP	*/
48#ifdef CONFIG_CF_SBF
49INITPC:	.long	ASM_DRAMINIT		/* Initial PC 	*/
50#endif
51#ifdef CONFIG_SYS_NAND_BOOT
52INITPC:	.long	ASM_DRAMINIT_N		/* Initial PC 	*/
53#endif
54
55#else
56
57INITSP:	.long	0			/* Initial SP	*/
58INITPC:	.long	_START			/* Initial PC 	*/
59
60#endif
61
62vector02_0F:
63.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
64.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
65
66/* Reserved */
67vector10_17:
68.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
69
70vector18_1F:
71.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
72
73#if !defined(CONFIG_SERIAL_BOOT)
74
75/* TRAP #0 - #15 */
76vector20_2F:
77.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
78.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
79
80/* Reserved	*/
81vector30_3F:
82.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
83.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
84
85vector64_127:
86.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
87.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
88.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
89.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
90.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
91.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
92.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
93.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
94
95vector128_191:
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.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
105vector192_255:
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.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#endif
115
116#if defined(CONFIG_SERIAL_BOOT)
117	/* Image header: chksum 4 bytes, len 4 bytes, img dest 4 bytes */
118asm_sbf_img_hdr:
119	.long	0x00000000		/* checksum, not yet implemented */
120	.long	0x00040000		/* image length */
121	.long	CONFIG_SYS_TEXT_BASE	/* image to be relocated at */
122
123asm_dram_init:
124	move.w	#0x2700,%sr		/* Mask off Interrupt */
125
126#ifdef CONFIG_SYS_NAND_BOOT
127	/* for assembly stack */
128	move.l	#(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
129	movec	%d0, %RAMBAR1
130
131	move.l	#(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
132	clr.l	%sp@-
133#endif
134
135#ifdef CONFIG_CF_SBF
136	move.l	#CONFIG_SYS_INIT_RAM_ADDR, %d0
137	movec	%d0, %VBR
138
139	move.l	#(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
140	movec	%d0, %RAMBAR1
141
142	/* initialize general use internal ram */
143	move.l	#0, %d0
144	move.l	#(ICACHE_STATUS), %a1	/* icache */
145	move.l	#(DCACHE_STATUS), %a2	/* dcache */
146	move.l	%d0, (%a1)
147	move.l	%d0, (%a2)
148
149	/* invalidate and disable cache */
150	move.l	#(CONFIG_SYS_ICACHE_INV + CONFIG_SYS_DCACHE_INV), %d0
151	movec	%d0, %CACR		/* Invalidate cache */
152	move.l	#0, %d0
153	movec	%d0, %ACR0
154	movec	%d0, %ACR1
155	movec	%d0, %ACR2
156	movec	%d0, %ACR3
157
158	move.l	#(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
159	clr.l	%sp@-
160
161#ifdef CONFIG_SYS_CS0_BASE
162	/* Must disable global address */
163	move.l	#0xFC008000, %a1
164	move.l	#(CONFIG_SYS_CS0_BASE), (%a1)
165	move.l	#0xFC008008, %a1
166	move.l	#(CONFIG_SYS_CS0_CTRL), (%a1)
167	move.l	#0xFC008004, %a1
168	move.l	#(CONFIG_SYS_CS0_MASK), (%a1)
169#endif
170#endif /* CONFIG_CF_SBF */
171
172#ifdef CONFIG_MCF5441x
173	/* TC: enable all peripherals,
174	in the future only enable certain peripherals */
175	move.l	#0xFC04002D, %a1
176
177#if defined(CONFIG_CF_SBF)
178	move.b	#23, (%a1)		/* dspi */
179#endif
180#endif	/* CONFIG_MCF5441x */
181
182	/* mandatory board level ddr-sdram init,
183	 * for both 5441x and 5445x
184	 */
185	bsr	sbf_dram_init
186
187#ifdef CONFIG_CF_SBF
188	/*
189	 * DSPI Initialization
190	 * a0 - general, sram - 0x80008000 - 32, see M54455EVB.h
191	 * a1 - dspi status
192	 * a2 - dtfr
193	 * a3 - drfr
194	 * a4 - Dst addr
195	 */
196	/* Enable pins for DSPI mode - chip-selects are enabled later */
197asm_dspi_init:
198#ifdef CONFIG_MCF5441x
199	move.l	#0xEC09404E, %a1
200	move.l	#0xEC09404F, %a2
201	move.b	#0xFF, (%a1)
202	move.b	#0x80, (%a2)
203#endif
204
205#ifdef CONFIG_MCF5445x
206	move.l	#0xFC0A4063, %a0
207	move.b	#0x7F, (%a0)
208#endif
209	/* Configure DSPI module */
210	move.l	#0xFC05C000, %a0
211	move.l	#0x80FF0C00, (%a0)	/* Master, clear TX/RX FIFO */
212
213	move.l	#0xFC05C00C, %a0
214#ifdef CONFIG_MCF5441x
215	move.l	#0x3E000016, (%a0)
216#endif
217#ifdef CONFIG_MCF5445x
218	move.l	#0x3E000011, (%a0)
219#endif
220
221	move.l	#0xFC05C034, %a2	/* dtfr */
222	move.l	#0xFC05C03B, %a3	/* drfr */
223
224	move.l	#(ASM_SBF_IMG_HDR + 4), %a1
225	move.l	(%a1)+, %d5
226	move.l	(%a1), %a4
227
228	move.l	#(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_SBFHDR_DATA_OFFSET), %a0
229	move.l	#(CONFIG_SYS_SBFHDR_SIZE), %d4
230
231	move.l	#0xFC05C02C, %a1	/* dspi status */
232
233	/* Issue commands and address */
234	move.l	#0x8002000B, %d2	/* Fast Read Cmd */
235	jsr	asm_dspi_wr_status
236	jsr	asm_dspi_rd_status
237
238	move.l	#0x80020000, %d2	/* Address byte 2 */
239	jsr	asm_dspi_wr_status
240	jsr	asm_dspi_rd_status
241
242	move.l	#0x80020000, %d2	/* Address byte 1 */
243	jsr	asm_dspi_wr_status
244	jsr	asm_dspi_rd_status
245
246	move.l	#0x80020000, %d2	/* Address byte 0 */
247	jsr	asm_dspi_wr_status
248	jsr	asm_dspi_rd_status
249
250	move.l	#0x80020000, %d2	/* Dummy Wr and Rd */
251	jsr	asm_dspi_wr_status
252	jsr	asm_dspi_rd_status
253
254	/* Transfer serial boot header to sram */
255asm_dspi_rd_loop1:
256	move.l	#0x80020000, %d2
257	jsr	asm_dspi_wr_status
258	jsr	asm_dspi_rd_status
259
260	move.b	%d1, (%a0)		/* read, copy to dst */
261
262	add.l	#1, %a0			/* inc dst by 1 */
263	sub.l	#1, %d4			/* dec cnt by 1 */
264	bne	asm_dspi_rd_loop1
265
266	/* Transfer u-boot from serial flash to memory */
267asm_dspi_rd_loop2:
268	move.l	#0x80020000, %d2
269	jsr	asm_dspi_wr_status
270	jsr	asm_dspi_rd_status
271
272	move.b	%d1, (%a4)		/* read, copy to dst */
273
274	add.l	#1, %a4			/* inc dst by 1 */
275	sub.l	#1, %d5			/* dec cnt by 1 */
276	bne	asm_dspi_rd_loop2
277
278	move.l	#0x00020000, %d2	/* Terminate */
279	jsr	asm_dspi_wr_status
280	jsr	asm_dspi_rd_status
281
282	/* jump to memory and execute */
283	move.l	#(CONFIG_SYS_TEXT_BASE + 0x400), %a0
284	jmp	(%a0)
285
286asm_dspi_wr_status:
287	move.l	(%a1), %d0		/* status */
288	and.l	#0x0000F000, %d0
289	cmp.l	#0x00003000, %d0
290	bgt	asm_dspi_wr_status
291
292	move.l	%d2, (%a2)
293	rts
294
295asm_dspi_rd_status:
296	move.l	(%a1), %d0		/* status */
297	and.l	#0x000000F0, %d0
298	lsr.l	#4, %d0
299	cmp.l	#0, %d0
300	beq	asm_dspi_rd_status
301
302	move.b	(%a3), %d1
303	rts
304#endif /* CONFIG_CF_SBF */
305
306#ifdef CONFIG_SYS_NAND_BOOT
307	/* copy 4 boot pages to dram as soon as possible */
308	/* each page is 996 bytes (1056 total with 60 ECC bytes */
309	move.l  #0x00000000, %a1	/* src */
310	move.l	#CONFIG_SYS_TEXT_BASE, %a2		/* dst */
311	move.l	#0x3E0, %d0		/* sz in long */
312
313asm_boot_nand_copy:
314	move.l	(%a1)+, (%a2)+
315	subq.l	#1, %d0
316	bne	asm_boot_nand_copy
317
318	/* jump to memory and execute */
319	move.l	#(asm_nand_init), %a0
320	jmp	(%a0)
321
322asm_nand_init:
323	/* exit nand boot-mode */
324	move.l	#0xFC0FFF30, %a1
325	or.l	#0x00000040, %d1
326	move.l	%d1, (%a1)
327
328	/* initialize general use internal ram */
329	move.l	#0, %d0
330	move.l	#(CACR_STATUS), %a1	/* CACR */
331	move.l	#(ICACHE_STATUS), %a2	/* icache */
332	move.l	#(DCACHE_STATUS), %a3	/* dcache */
333	move.l	%d0, (%a1)
334	move.l	%d0, (%a2)
335	move.l	%d0, (%a3)
336
337	/* invalidate and disable cache */
338	move.l	#0x01004100, %d0	/* Invalidate cache cmd */
339	movec	%d0, %CACR		/* Invalidate cache */
340	move.l	#0, %d0
341	movec	%d0, %ACR0
342	movec	%d0, %ACR1
343	movec	%d0, %ACR2
344	movec	%d0, %ACR3
345
346#ifdef CONFIG_SYS_CS0_BASE
347	/* Must disable global address */
348	move.l	#0xFC008000, %a1
349	move.l	#(CONFIG_SYS_CS0_BASE), (%a1)
350	move.l	#0xFC008008, %a1
351	move.l	#(CONFIG_SYS_CS0_CTRL), (%a1)
352	move.l	#0xFC008004, %a1
353	move.l	#(CONFIG_SYS_CS0_MASK), (%a1)
354#endif
355
356	/* NAND port configuration */
357	move.l	#0xEC094048, %a1
358	move.b	#0xFD, (%a1)+
359	move.b	#0x5F, (%a1)+
360	move.b	#0x04, (%a1)+
361
362	/* reset nand */
363	move.l  #0xFC0FFF38, %a1	/* isr */
364	move.l  #0x000e0000, (%a1)
365	move.l	#0xFC0FFF08, %a2
366	move.l	#0x00000000, (%a2)+	/* car */
367	move.l	#0x11000000, (%a2)+	/* rar */
368	move.l	#0x00000000, (%a2)+	/* rpt */
369	move.l	#0x00000000, (%a2)+	/* rai */
370	move.l  #0xFC0FFF2c, %a2	/* cfg */
371	move.l  #0x00000000, (%a2)+	/* secsz */
372	move.l  #0x000e0681, (%a2)+
373	move.l  #0xFC0FFF04, %a2	/* cmd2 */
374	move.l  #0xFF404001, (%a2)
375	move.l  #0x000e0000, (%a1)
376
377	move.l	#0x2000, %d1
378	bsr	asm_delay
379
380	/* setup nand */
381	move.l  #0xFC0FFF00, %a1
382	move.l  #0x30700000, (%a1)+	/* cmd1 */
383	move.l  #0x007EF000, (%a1)+	/* cmd2 */
384
385	move.l  #0xFC0FFF2C, %a1
386	move.l  #0x00000841, (%a1)+	/* secsz */
387	move.l  #0x000e0681, (%a1)+	/* cfg */
388
389	move.l	#100, %d4		/* 100 pages ~200KB */
390	move.l	#4, %d2			/* start at 4 */
391	move.l  #0xFC0FFF04, %a0	/* cmd2 */
392	move.l  #0xFC0FFF0C, %a1	/* rar */
393	move.l	#(CONFIG_SYS_TEXT_BASE + 0xF80), %a2
394
395asm_nand_read:
396	move.l	#0x11000000, %d0	/* rar */
397	or.l	%d2, %d0
398	move.l	%d0, (%a1)
399	add.l	#1, %d2
400
401	move.l	(%a0), %d0		/* cmd2 */
402	or.l	#1, %d0
403	move.l	%d0, (%a0)
404
405	move.l	#0x200, %d1
406	bsr	asm_delay
407
408asm_nand_chk_status:
409	move.l  #0xFC0FFF38, %a4	/* isr */
410	move.l	(%a4), %d0
411	and.l	#0x40000000, %d0
412	tst.l	%d0
413	beq	asm_nand_chk_status
414
415	move.l  #0xFC0FFF38, %a4	/* isr */
416	move.l	(%a4), %d0
417	or.l	#0x000E0000, %d0
418	move.l	%d0, (%a4)
419
420	move.l	#0x200, %d3
421	move.l	#0xFC0FC000, %a3	/* buf 1 */
422asm_nand_copy:
423	move.l	(%a3)+, (%a2)+
424	subq.l	#1, %d3
425	bgt	asm_nand_copy
426
427	subq.l	#1, %d4
428	bgt	asm_nand_read
429
430	/* jump to memory and execute */
431	move.l	#(CONFIG_SYS_TEXT_BASE + 0x400), %a0
432	jmp	(%a0)
433
434#endif			/* CONFIG_SYS_NAND_BOOT */
435
436.globl asm_delay
437asm_delay:
438	nop
439	subq.l	#1, %d1
440	bne	asm_delay
441	rts
442#endif			/* CONFIG_CF_SBF || CONFIG_NAND_U_BOOT */
443
444.text
445	. = 0x400
446.globl _start
447_start:
448#if !defined(CONFIG_SERIAL_BOOT)
449	nop
450	nop
451	move.w	#0x2700,%sr		/* Mask off Interrupt */
452
453	/* Set vector base register at the beginning of the Flash */
454	move.l	#CONFIG_SYS_FLASH_BASE, %d0
455	movec	%d0, %VBR
456
457	move.l	#(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
458	movec	%d0, %RAMBAR1
459
460	/* initialize general use internal ram */
461	move.l	#0, %d0
462	move.l	#(ICACHE_STATUS), %a1	/* icache */
463	move.l	#(DCACHE_STATUS), %a2	/* dcache */
464	move.l	%d0, (%a1)
465	move.l	%d0, (%a2)
466
467	/* invalidate and disable cache */
468	move.l	#(CONFIG_SYS_ICACHE_INV + CONFIG_SYS_DCACHE_INV), %d0
469	movec	%d0, %CACR		/* Invalidate cache */
470	move.l	#0, %d0
471	movec	%d0, %ACR0
472	movec	%d0, %ACR1
473	movec	%d0, %ACR2
474	movec	%d0, %ACR3
475#else
476	move.l	#(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
477	movec	%d0, %RAMBAR1
478#endif
479
480	/* put relocation table address to a5 */
481	move.l	#__got_start, %a5
482
483	/* setup stack initially on top of internal static ram  */
484	move.l	#(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE), %sp
485
486	/*
487	 * if configured, malloc_f arena will be reserved first,
488	 * then (and always) gd struct space will be reserved
489	 */
490	move.l	%sp, -(%sp)
491	move.l	#board_init_f_alloc_reserve, %a1
492	jsr	(%a1)
493
494	/* update stack and frame-pointers */
495	move.l	%d0, %sp
496	move.l	%sp, %fp
497
498	/* initialize reserved area */
499	move.l	%d0, -(%sp)
500	move.l	#board_init_f_init_reserve, %a1
501	jsr	(%a1)
502
503	/* run low-level CPU init code (from flash) */
504	move.l	#cpu_init_f, %a1
505	jsr	(%a1)
506
507	/* run low-level board init code (from flash) */
508	clr.l   %sp@-
509	move.l	#board_init_f, %a1
510	jsr	(%a1)
511
512	/* board_init_f() does not return */
513
514/******************************************************************************/
515
516/*
517 * void relocate_code (addr_sp, gd, addr_moni)
518 *
519 * This "function" does not return, instead it continues in RAM
520 * after relocating the monitor code.
521 *
522 * r3 = dest
523 * r4 = src
524 * r5 = length in bytes
525 * r6 = cachelinesize
526 */
527.globl relocate_code
528relocate_code:
529	link.w	%a6,#0
530	move.l	8(%a6), %sp		/* set new stack pointer */
531
532	move.l	12(%a6), %d0		/* Save copy of Global Data pointer */
533	move.l	16(%a6), %a0		/* Save copy of Destination Address */
534
535	move.l	#CONFIG_SYS_MONITOR_BASE, %a1
536	move.l	#__init_end, %a2
537	move.l	%a0, %a3
538
539	/* copy the code to RAM */
5401:
541	move.l	(%a1)+, (%a3)+
542	cmp.l	%a1,%a2
543	bgt.s	1b
544
545/*
546 * We are done. Do not return, instead branch to second part of board
547 * initialization, now running from RAM.
548 */
549	move.l	%a0, %a1
550	add.l	#(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
551	jmp	(%a1)
552
553in_ram:
554
555clear_bss:
556	/*
557	 * Now clear BSS segment
558	 */
559	move.l	%a0, %a1
560	add.l	#(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
561	move.l	%a0, %d1
562	add.l	#(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
5636:
564	clr.l	(%a1)+
565	cmp.l	%a1,%d1
566	bgt.s	6b
567
568	/*
569	 * fix got table in RAM
570	 */
571	move.l	%a0, %a1
572	add.l	#(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
573	move.l	%a1,%a5			/* fix got pointer register a5 */
574
575	move.l	%a0, %a2
576	add.l	#(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
577
5787:
579	move.l	(%a1),%d1
580	sub.l	#_start,%d1
581	add.l	%a0,%d1
582	move.l	%d1,(%a1)+
583	cmp.l	%a2, %a1
584	bne	7b
585
586	/* calculate relative jump to board_init_r in ram */
587	move.l	%a0, %a1
588	add.l	#(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
589
590	/* set parameters for board_init_r */
591	move.l	%a0,-(%sp)		/* dest_addr */
592	move.l	%d0,-(%sp)		/* gd */
593	jsr	(%a1)
594
595/******************************************************************************/
596
597/* exception code */
598.globl _fault
599_fault:
600	bra	_fault
601
602.globl _exc_handler
603_exc_handler:
604	SAVE_ALL
605	movel	%sp,%sp@-
606	bsr	exc_handler
607	addql	#4,%sp
608	RESTORE_ALL
609
610.globl _int_handler
611_int_handler:
612	SAVE_ALL
613	movel	%sp,%sp@-
614	bsr	int_handler
615	addql	#4,%sp
616	RESTORE_ALL
617
618/******************************************************************************/
619
620.globl version_string
621version_string:
622.ascii U_BOOT_VERSION_STRING, "\0"
623.align 4
624