blob: f0cfa6ffe059ebe28940eb5994d9fca89ec2ea63 [file] [log] [blame]
wdenke65527f2004-02-12 00:47:09 +00001/*
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
Wolfgang Denk0191e472010-10-26 14:34:52 +020024#include <asm-offsets.h>
wdenke65527f2004-02-12 00:47:09 +000025#include <config.h>
Peter Tyser62948502008-11-03 09:30:59 -060026#include <timestamp.h>
wdenke65527f2004-02-12 00:47:09 +000027#include "version.h"
TsiChung Liew0ee47d42010-03-11 22:12:53 -060028#include <asm/cache.h>
wdenke65527f2004-02-12 00:47:09 +000029
30#ifndef CONFIG_IDENT_STRING
31#define CONFIG_IDENT_STRING ""
32#endif
33
wdenke65527f2004-02-12 00:47:09 +000034#define _START _start
35#define _FAULT _fault
36
37
38#define SAVE_ALL \
39 move.w #0x2700,%sr; /* disable intrs */ \
40 subl #60,%sp; /* space for 15 regs */ \
41 moveml %d0-%d7/%a0-%a6,%sp@; \
42
43#define RESTORE_ALL \
44 moveml %sp@,%d0-%d7/%a0-%a6; \
45 addl #60,%sp; /* space for 15 regs */ \
46 rte
47
48/* If we come from a pre-loader we don't need an initial exception
49 * table.
50 */
51#if !defined(CONFIG_MONITOR_IS_IN_RAM)
52
53.text
54/*
55 * Vector table. This is used for initial platform startup.
56 * These vectors are to catch any un-intended traps.
57 */
58_vectors:
59
Wolfgang Denkb4b1c462006-06-10 19:27:47 +020060.long 0x00000000 /* Flash offset is 0 until we setup CS0 */
Wolfgang Denk0708bc62010-10-07 21:51:12 +020061#if defined(CONFIG_M5282) && (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE)
62.long _start - CONFIG_SYS_TEXT_BASE
Zachary P. Landau0bba8622006-01-26 17:35:56 -050063#else
Wolfgang Denkb4b1c462006-06-10 19:27:47 +020064.long _START
Zachary P. Landau0bba8622006-01-26 17:35:56 -050065#endif
Wolfgang Denkb4b1c462006-06-10 19:27:47 +020066
wdenke65527f2004-02-12 00:47:09 +000067.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
68.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
69.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
70.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
71.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
72.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
73.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
74.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
75
76.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
77.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
78.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
79.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
80.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
81.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
82.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
83.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
84
85.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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
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.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
101.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
102
103#endif
104
105 .text
106
Heiko Schocherac1956e2006-04-20 08:42:42 +0200107
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200108#if defined(CONFIG_SYS_INT_FLASH_BASE) && \
Heiko Schocherac1956e2006-04-20 08:42:42 +0200109 (defined(CONFIG_M5282) || defined(CONFIG_M5281))
Wolfgang Denk0708bc62010-10-07 21:51:12 +0200110 #if (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE)
Heiko Schocherac1956e2006-04-20 08:42:42 +0200111 .long 0x55AA55AA,0xAA55AA55 /* CFM Backdoorkey */
112 .long 0xFFFFFFFF /* all sectors protected */
113 .long 0x00000000 /* supervisor/User restriction */
114 .long 0x00000000 /* programm/data space restriction */
115 .long 0x00000000 /* Flash security */
116 #endif
117#endif
wdenke65527f2004-02-12 00:47:09 +0000118 .globl _start
119_start:
120 nop
121 nop
122 move.w #0x2700,%sr
123
TsiChung Liewb354aef2009-06-12 11:29:00 +0000124#if defined(CONFIG_M5208)
125 /* Initialize RAMBAR: locate SRAM and validate it */
126 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
127 movec %d0, %RAMBAR1
128#endif
129
TsiChungLiew34674692007-08-16 13:20:50 -0500130#if defined(CONFIG_M5272) || defined(CONFIG_M5249) || defined(CONFIG_M5253)
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200131 move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set MBAR address + valid flag */
wdenke65527f2004-02-12 00:47:09 +0000132 move.c %d0, %MBAR
133
stroese53395a22004-12-16 18:09:49 +0000134 /*** The 5249 has MBAR2 as well ***/
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200135#ifdef CONFIG_SYS_MBAR2
136 move.l #(CONFIG_SYS_MBAR2 + 1), %d0 /* Get MBAR2 address */
stroese53395a22004-12-16 18:09:49 +0000137 movec %d0, #0xc0e /* Set MBAR2 */
138#endif
139
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200140 move.l #(CONFIG_SYS_INIT_RAM_ADDR + 1), %d0
wdenke65527f2004-02-12 00:47:09 +0000141 movec %d0, %RAMBAR0
TsiChungLiew34674692007-08-16 13:20:50 -0500142#endif /* CONFIG_M5272 || CONFIG_M5249 || CONFIG_M5253 */
wdenke65527f2004-02-12 00:47:09 +0000143
Wolfgang Denkb4b1c462006-06-10 19:27:47 +0200144#if defined(CONFIG_M5282) || defined(CONFIG_M5271)
wdenke65527f2004-02-12 00:47:09 +0000145 /* Initialize IPSBAR */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200146 move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set IPSBAR address + valid flag */
wdenke65527f2004-02-12 00:47:09 +0000147 move.l %d0, 0x40000000
148
Heiko Schocherac1956e2006-04-20 08:42:42 +0200149 /* Initialize RAMBAR1: locate SRAM and validate it */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200150 move.l #(CONFIG_SYS_INIT_RAM_ADDR + 0x21), %d0
Heiko Schocherac1956e2006-04-20 08:42:42 +0200151 movec %d0, %RAMBAR1
152
Bartlomiej Sieka8ff81c62006-12-20 00:27:32 +0100153#if defined(CONFIG_M5282)
Wolfgang Denk0708bc62010-10-07 21:51:12 +0200154#if (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE)
Heiko Schocherac1956e2006-04-20 08:42:42 +0200155 /* Setup code in SRAM to initialize FLASHBAR, if start from internal Flash */
156
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200157 move.l #(_flashbar_setup-CONFIG_SYS_INT_FLASH_BASE), %a0
158 move.l #(_flashbar_setup_end-CONFIG_SYS_INT_FLASH_BASE), %a1
159 move.l #(CONFIG_SYS_INIT_RAM_ADDR), %a2
Heiko Schocherac1956e2006-04-20 08:42:42 +0200160_copy_flash:
161 move.l (%a0)+, (%a2)+
162 cmp.l %a0, %a1
163 bgt.s _copy_flash
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200164 jmp CONFIG_SYS_INIT_RAM_ADDR
Heiko Schocherac1956e2006-04-20 08:42:42 +0200165
166_flashbar_setup:
wdenke65527f2004-02-12 00:47:09 +0000167 /* Initialize FLASHBAR: locate internal Flash and validate it */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200168 move.l #(CONFIG_SYS_INT_FLASH_BASE + CONFIG_SYS_INT_FLASH_ENABLE), %d0
TsiChung Liew7e5ae272008-03-13 14:26:32 -0500169 movec %d0, %FLASHBAR
Heiko Schocherac1956e2006-04-20 08:42:42 +0200170 jmp _after_flashbar_copy.L /* Force jump to absolute address */
171_flashbar_setup_end:
172 nop
173_after_flashbar_copy:
174#else
175 /* Setup code to initialize FLASHBAR, if start from external Memory */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200176 move.l #(CONFIG_SYS_INT_FLASH_BASE + CONFIG_SYS_INT_FLASH_ENABLE), %d0
TsiChung Liewfcd4aac2008-08-11 15:54:25 +0000177 movec %d0, %FLASHBAR
Wolfgang Denk0708bc62010-10-07 21:51:12 +0200178#endif /* (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) */
wdenke65527f2004-02-12 00:47:09 +0000179
Heiko Schocherac1956e2006-04-20 08:42:42 +0200180#endif
Wolfgang Denk5b1657d2006-09-04 01:03:57 +0200181#endif
Heiko Schocherac1956e2006-04-20 08:42:42 +0200182 /* if we come from a pre-loader we have no exception table and
183 * therefore no VBR to set
184 */
185#if !defined(CONFIG_MONITOR_IS_IN_RAM)
Wolfgang Denk0708bc62010-10-07 21:51:12 +0200186#if defined(CONFIG_M5282) && (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE)
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200187 move.l #CONFIG_SYS_INT_FLASH_BASE, %d0
TsiChungLiew5bffcad2007-10-25 17:09:17 -0500188#else
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200189 move.l #CONFIG_SYS_FLASH_BASE, %d0
TsiChungLiew5bffcad2007-10-25 17:09:17 -0500190#endif
Heiko Schocherac1956e2006-04-20 08:42:42 +0200191 movec %d0, %VBR
Marian Balakowiczc20d87d2006-05-09 11:51:51 +0200192#endif
193
Matthew Fettke761e2e92008-02-04 15:38:20 -0600194#ifdef CONFIG_M5275
195 /* Initialize IPSBAR */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200196 move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set IPSBAR address + valid flag */
Matthew Fettke761e2e92008-02-04 15:38:20 -0600197 move.l %d0, 0x40000000
198/* movec %d0, %MBAR */
199
200 /* Initialize RAMBAR: locate SRAM and validate it */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200201 move.l #(CONFIG_SYS_INIT_RAM_ADDR + 0x21), %d0
Matthew Fettke761e2e92008-02-04 15:38:20 -0600202 movec %d0, %RAMBAR1
203#endif
204
TsiChung Liew0ee47d42010-03-11 22:12:53 -0600205 /* initialize general use internal ram */
206 move.l #0, %d0
207 move.l #(ICACHE_STATUS), %a1 /* icache */
208 move.l #(DCACHE_STATUS), %a2 /* icache */
209 move.l %d0, (%a1)
210 move.l %d0, (%a2)
211
wdenke65527f2004-02-12 00:47:09 +0000212 /* set stackpointer to end of internal ram to get some stackspace for the first c-code */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200213 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
wdenke65527f2004-02-12 00:47:09 +0000214 clr.l %sp@-
215
216 move.l #__got_start, %a5 /* put relocation table address to a5 */
217
218 bsr cpu_init_f /* run low-level CPU init code (from flash) */
219 bsr board_init_f /* run low-level board init code (from flash) */
220
Marian Balakowiczc20d87d2006-05-09 11:51:51 +0200221 /* board_init_f() does not return */
wdenke65527f2004-02-12 00:47:09 +0000222
223/*------------------------------------------------------------------------------*/
224
225/*
226 * void relocate_code (addr_sp, gd, addr_moni)
227 *
228 * This "function" does not return, instead it continues in RAM
229 * after relocating the monitor code.
230 *
231 * r3 = dest
232 * r4 = src
233 * r5 = length in bytes
234 * r6 = cachelinesize
235 */
236 .globl relocate_code
237relocate_code:
238 link.w %a6,#0
239 move.l 8(%a6), %sp /* set new stack pointer */
240
241 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
242 move.l 16(%a6), %a0 /* Save copy of Destination Address */
243
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200244 move.l #CONFIG_SYS_MONITOR_BASE, %a1
wdenke65527f2004-02-12 00:47:09 +0000245 move.l #__init_end, %a2
246 move.l %a0, %a3
wdenke65527f2004-02-12 00:47:09 +0000247 /* copy the code to RAM */
2481:
249 move.l (%a1)+, (%a3)+
250 cmp.l %a1,%a2
251 bgt.s 1b
252
253/*
254 * We are done. Do not return, instead branch to second part of board
255 * initialization, now running from RAM.
256 */
Wolfgang Denka1be4762008-05-20 16:00:29 +0200257 move.l %a0, %a1
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200258 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
wdenke65527f2004-02-12 00:47:09 +0000259 jmp (%a1)
260
261in_ram:
262
263clear_bss:
Wolfgang Denka1be4762008-05-20 16:00:29 +0200264 /*
wdenke65527f2004-02-12 00:47:09 +0000265 * Now clear BSS segment
266 */
267 move.l %a0, %a1
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200268 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
wdenke65527f2004-02-12 00:47:09 +0000269 move.l %a0, %d1
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200270 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
wdenke65527f2004-02-12 00:47:09 +00002716:
272 clr.l (%a1)+
273 cmp.l %a1,%d1
274 bgt.s 6b
275
276 /*
277 * fix got table in RAM
278 */
279 move.l %a0, %a1
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200280 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
wdenke65527f2004-02-12 00:47:09 +0000281 move.l %a1,%a5 /* * fix got pointer register a5 */
282
283 move.l %a0, %a2
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200284 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
wdenke65527f2004-02-12 00:47:09 +0000285
2867:
287 move.l (%a1),%d1
288 sub.l #_start,%d1
289 add.l %a0,%d1
290 move.l %d1,(%a1)+
291 cmp.l %a2, %a1
292 bne 7b
293
294 /* calculate relative jump to board_init_r in ram */
295 move.l %a0, %a1
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200296 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
wdenke65527f2004-02-12 00:47:09 +0000297
298 /* set parameters for board_init_r */
299 move.l %a0,-(%sp) /* dest_addr */
300 move.l %d0,-(%sp) /* gd */
Wolfgang Denk0708bc62010-10-07 21:51:12 +0200301#if defined(DEBUG) && (CONFIG_SYS_TEXT_BASE != CONFIG_SYS_INT_FLASH_BASE) && \
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200302 defined(CONFIG_SYS_HALT_BEFOR_RAM_JUMP)
TsiChungLiew8cd73be2007-08-15 19:21:21 -0500303 halt
304#endif
wdenke65527f2004-02-12 00:47:09 +0000305 jsr (%a1)
306
307/*------------------------------------------------------------------------------*/
308/* exception code */
309 .globl _fault
310_fault:
311 jmp _fault
312
313 .globl _exc_handler
314_exc_handler:
315 SAVE_ALL
316 movel %sp,%sp@-
317 bsr exc_handler
318 addql #4,%sp
319 RESTORE_ALL
320
321 .globl _int_handler
322_int_handler:
323 SAVE_ALL
324 movel %sp,%sp@-
325 bsr int_handler
326 addql #4,%sp
327 RESTORE_ALL
328
329/*------------------------------------------------------------------------------*/
wdenke65527f2004-02-12 00:47:09 +0000330
331 .globl version_string
332version_string:
333 .ascii U_BOOT_VERSION
Peter Tyser62948502008-11-03 09:30:59 -0600334 .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
wdenke65527f2004-02-12 00:47:09 +0000335 .ascii CONFIG_IDENT_STRING, "\0"
TsiChung Liew9d636e92008-03-28 08:47:45 -0500336 .align 4