1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
|
/*
* 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 <timestamp.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 #CONFIG_SYS_FLASH_BASE, %d0
movec %d0, %VBR
move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
movec %d0, %RAMBAR1
/* invalidate and disable cache */
move.l #0x01000000, %d0 /* Invalidate cache cmd */
movec %d0, %CACR /* Invalidate cache */
nop
move.l #0, %d0
movec %d0, %ACR0
movec %d0, %ACR1
/* initialize general use internal ram */
move.l #0, %d0
move.l #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END-8), %a1
move.l #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_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 #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_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 #CONFIG_SYS_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 - CONFIG_SYS_MONITOR_BASE), %a1
jmp (%a1)
in_ram:
clear_bss:
/*
* Now clear BSS segment
*/
move.l %a0, %a1
add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
move.l %a0, %d1
add.l #(_ebss - CONFIG_SYS_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 - CONFIG_SYS_MONITOR_BASE),%a1
move.l %a1,%a5 /* * fix got pointer register a5 */
move.l %a0, %a2
add.l #(__got_end - CONFIG_SYS_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 - CONFIG_SYS_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 */
nop
move.l #(CONFIG_SYS_SDRAM_BASE + 0xc000), %d0 /* Setup cache mask */
movec %d0, %ACR0 /* Enable cache */
move.l #(CONFIG_SYS_FLASH_BASE + 0xc000), %d0 /* Setup cache mask */
movec %d0, %ACR1 /* Enable cache */
move.l #0x80400100, %d0 /* Setup cache mask */
movec %d0, %CACR /* Enable cache */
nop
move.l #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END-8), %a1
moveq #1, %d0
move.l %d0, (%a1)
rts
.globl icache_disable
icache_disable:
move.l #0x00000100, %d0 /* Setup cache mask */
movec %d0, %CACR /* Disable cache */
clr.l %d0 /* Setup cache mask */
movec %d0, %ACR0
movec %d0, %ACR1
move.l #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END-8), %a1
moveq #0, %d0
move.l %d0, (%a1)
rts
.globl icache_status
icache_status:
move.l #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END-8), %a1
move.l (%a1), %d0
rts
.globl icache_invalid
icache_invalid:
move.l #0x80600100, %d0 /* Setup cache mask */
movec %d0, %CACR /* Enable cache */
nop
rts
.globl dcache_enable
dcache_enable:
move.l #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_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 #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END-4), %a1
moveq #0, %d0
move.l %d0, (%a1)
rts
.globl dcache_status
dcache_status:
move.l #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END-4), %a1
move.l (%a1), %d0
rts
/*------------------------------------------------------------------------------*/
.globl version_string
version_string:
.ascii U_BOOT_VERSION
.ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
.ascii CONFIG_IDENT_STRING, "\0"
.align 4
|
