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4a442d31 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> | |
561858ee | 25 | #include <timestamp.h> |
4a442d31 | 26 | #include "version.h" |
dd9f054e | 27 | #include <asm/cache.h> |
4a442d31 TL |
28 | |
29 | #ifndef CONFIG_IDENT_STRING | |
30 | #define CONFIG_IDENT_STRING "" | |
31 | #endif | |
32 | ||
33 | #define _START _start | |
34 | #define _FAULT _fault | |
35 | ||
36 | #define SAVE_ALL \ | |
37 | move.w #0x2700,%sr; /* disable intrs */ \ | |
38 | subl #60,%sp; /* space for 15 regs */ \ | |
39 | moveml %d0-%d7/%a0-%a6,%sp@; | |
40 | ||
41 | #define RESTORE_ALL \ | |
42 | moveml %sp@,%d0-%d7/%a0-%a6; \ | |
43 | addl #60,%sp; /* space for 15 regs */ \ | |
44 | rte; | |
45 | ||
46 | .text | |
47 | /* | |
48 | * Vector table. This is used for initial platform startup. | |
49 | * These vectors are to catch any un-intended traps. | |
50 | */ | |
51 | _vectors: | |
52 | ||
53 | INITSP: .long 0x00000000 /* Initial SP */ | |
53677ef1 | 54 | INITPC: .long _START /* Initial PC */ |
4a442d31 TL |
55 | vector02: .long _FAULT /* Access Error */ |
56 | vector03: .long _FAULT /* Address Error */ | |
57 | vector04: .long _FAULT /* Illegal Instruction */ | |
58 | vector05: .long _FAULT /* Reserved */ | |
59 | vector06: .long _FAULT /* Reserved */ | |
60 | vector07: .long _FAULT /* Reserved */ | |
61 | vector08: .long _FAULT /* Privilege Violation */ | |
62 | vector09: .long _FAULT /* Trace */ | |
63 | vector0A: .long _FAULT /* Unimplemented A-Line */ | |
64 | vector0B: .long _FAULT /* Unimplemented F-Line */ | |
65 | vector0C: .long _FAULT /* Debug Interrupt */ | |
66 | vector0D: .long _FAULT /* Reserved */ | |
67 | vector0E: .long _FAULT /* Format Error */ | |
68 | vector0F: .long _FAULT /* Unitialized Int. */ | |
69 | ||
70 | /* Reserved */ | |
71 | vector10_17: | |
72 | .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT | |
73 | ||
74 | vector18: .long _FAULT /* Spurious Interrupt */ | |
75 | vector19: .long _FAULT /* Autovector Level 1 */ | |
76 | vector1A: .long _FAULT /* Autovector Level 2 */ | |
77 | vector1B: .long _FAULT /* Autovector Level 3 */ | |
78 | vector1C: .long _FAULT /* Autovector Level 4 */ | |
79 | vector1D: .long _FAULT /* Autovector Level 5 */ | |
80 | vector1E: .long _FAULT /* Autovector Level 6 */ | |
81 | vector1F: .long _FAULT /* Autovector Level 7 */ | |
82 | ||
83 | /* TRAP #0 - #15 */ | |
84 | vector20_2F: | |
85 | .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT | |
86 | .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT | |
87 | ||
88 | /* Reserved */ | |
89 | vector30_3F: | |
90 | .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT | |
91 | .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT | |
92 | ||
93 | vector64_127: | |
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 | vector128_191: | |
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 | .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT | |
111 | .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT | |
112 | ||
113 | vector192_255: | |
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 | .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT | |
121 | .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT | |
122 | ||
123 | .text | |
124 | ||
125 | .globl _start | |
126 | _start: | |
127 | nop | |
128 | nop | |
129 | move.w #0x2700,%sr /* Mask off Interrupt */ | |
130 | ||
131 | /* Set vector base register at the beginning of the Flash */ | |
6d0f6bcf | 132 | move.l #CONFIG_SYS_FLASH_BASE, %d0 |
4a442d31 TL |
133 | movec %d0, %VBR |
134 | ||
6d0f6bcf | 135 | move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 |
4a442d31 TL |
136 | movec %d0, %RAMBAR1 |
137 | ||
138 | /* invalidate and disable cache */ | |
dd9f054e | 139 | move.l #CF_CACR_CINV, %d0 /* Invalidate cache cmd */ |
4a442d31 TL |
140 | movec %d0, %CACR /* Invalidate cache */ |
141 | nop | |
142 | move.l #0, %d0 | |
143 | movec %d0, %ACR0 | |
144 | movec %d0, %ACR1 | |
145 | ||
146 | /* initialize general use internal ram */ | |
147 | move.l #0, %d0 | |
dd9f054e TL |
148 | move.l #(ICACHE_STATUS), %a1 /* icache */ |
149 | move.l #(DCACHE_STATUS), %a2 /* icache */ | |
4a442d31 TL |
150 | move.l %d0, (%a1) |
151 | move.l %d0, (%a2) | |
152 | ||
153 | /* set stackpointer to end of internal ram to get some stackspace for the | |
154 | first c-code */ | |
6d0f6bcf | 155 | move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp |
4a442d31 TL |
156 | clr.l %sp@- |
157 | ||
158 | move.l #__got_start, %a5 /* put relocation table address to a5 */ | |
159 | ||
160 | bsr cpu_init_f /* run low-level CPU init code (from flash) */ | |
161 | bsr board_init_f /* run low-level board init code (from flash) */ | |
162 | ||
163 | /* board_init_f() does not return */ | |
164 | ||
165 | /*------------------------------------------------------------------------------*/ | |
166 | ||
167 | /* | |
168 | * void relocate_code (addr_sp, gd, addr_moni) | |
169 | * | |
170 | * This "function" does not return, instead it continues in RAM | |
171 | * after relocating the monitor code. | |
172 | * | |
173 | * r3 = dest | |
174 | * r4 = src | |
175 | * r5 = length in bytes | |
176 | * r6 = cachelinesize | |
177 | */ | |
178 | .globl relocate_code | |
179 | relocate_code: | |
180 | link.w %a6,#0 | |
181 | move.l 8(%a6), %sp /* set new stack pointer */ | |
182 | ||
183 | move.l 12(%a6), %d0 /* Save copy of Global Data pointer */ | |
184 | move.l 16(%a6), %a0 /* Save copy of Destination Address */ | |
185 | ||
6d0f6bcf | 186 | move.l #CONFIG_SYS_MONITOR_BASE, %a1 |
4a442d31 TL |
187 | move.l #__init_end, %a2 |
188 | move.l %a0, %a3 | |
189 | ||
190 | /* copy the code to RAM */ | |
191 | 1: | |
192 | move.l (%a1)+, (%a3)+ | |
193 | cmp.l %a1,%a2 | |
194 | bgt.s 1b | |
195 | ||
196 | /* | |
197 | * We are done. Do not return, instead branch to second part of board | |
198 | * initialization, now running from RAM. | |
199 | */ | |
200 | move.l %a0, %a1 | |
6d0f6bcf | 201 | add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1 |
4a442d31 TL |
202 | jmp (%a1) |
203 | ||
204 | in_ram: | |
205 | ||
206 | clear_bss: | |
207 | /* | |
208 | * Now clear BSS segment | |
209 | */ | |
210 | move.l %a0, %a1 | |
6d0f6bcf | 211 | add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1 |
4a442d31 | 212 | move.l %a0, %d1 |
6d0f6bcf | 213 | add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1 |
4a442d31 TL |
214 | 6: |
215 | clr.l (%a1)+ | |
216 | cmp.l %a1,%d1 | |
217 | bgt.s 6b | |
218 | ||
219 | /* | |
220 | * fix got table in RAM | |
221 | */ | |
222 | move.l %a0, %a1 | |
6d0f6bcf | 223 | add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1 |
4a442d31 TL |
224 | move.l %a1,%a5 /* * fix got pointer register a5 */ |
225 | ||
226 | move.l %a0, %a2 | |
6d0f6bcf | 227 | add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2 |
4a442d31 TL |
228 | |
229 | 7: | |
230 | move.l (%a1),%d1 | |
231 | sub.l #_start,%d1 | |
232 | add.l %a0,%d1 | |
233 | move.l %d1,(%a1)+ | |
234 | cmp.l %a2, %a1 | |
235 | bne 7b | |
236 | ||
237 | /* calculate relative jump to board_init_r in ram */ | |
238 | move.l %a0, %a1 | |
6d0f6bcf | 239 | add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1 |
4a442d31 TL |
240 | |
241 | /* set parameters for board_init_r */ | |
242 | move.l %a0,-(%sp) /* dest_addr */ | |
243 | move.l %d0,-(%sp) /* gd */ | |
244 | jsr (%a1) | |
245 | ||
246 | /*------------------------------------------------------------------------------*/ | |
247 | /* exception code */ | |
248 | .globl _fault | |
249 | _fault: | |
250 | jmp _fault | |
251 | .globl _exc_handler | |
252 | ||
253 | _exc_handler: | |
254 | SAVE_ALL | |
255 | movel %sp,%sp@- | |
256 | bsr exc_handler | |
257 | addql #4,%sp | |
258 | RESTORE_ALL | |
259 | ||
260 | .globl _int_handler | |
261 | _int_handler: | |
262 | SAVE_ALL | |
263 | movel %sp,%sp@- | |
264 | bsr int_handler | |
265 | addql #4,%sp | |
266 | RESTORE_ALL | |
267 | ||
4a442d31 TL |
268 | /*------------------------------------------------------------------------------*/ |
269 | ||
270 | .globl version_string | |
271 | version_string: | |
272 | .ascii U_BOOT_VERSION | |
561858ee | 273 | .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")" |
4a442d31 | 274 | .ascii CONFIG_IDENT_STRING, "\0" |
9b46432f | 275 | .align 4 |