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c8758102 TL |
1 | /* |
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 | ||
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 */ | |
6d0f6bcf JCPV |
32 | #define ICACHE_STATUS (CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END- 4) |
33 | #define DCACHE_STATUS (CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END- 8) | |
34 | #define CACR_STATUS (CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END-12) | |
c8758102 TL |
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 */ | |
57 | INITPC: .long _START /* Initial PC */ | |
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 */ | |
6d0f6bcf | 135 | move.l #CONFIG_SYS_FLASH_BASE, %d0 |
c8758102 TL |
136 | movec %d0, %VBR |
137 | ||
6d0f6bcf | 138 | move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 |
c8758102 TL |
139 | movec %d0, %RAMBAR1 |
140 | ||
141 | /* initialize general use internal ram */ | |
142 | move.l #0, %d0 | |
143 | move.l #(ICACHE_STATUS), %a1 /* icache */ | |
144 | move.l #(DCACHE_STATUS), %a2 /* icache */ | |
145 | move.l #(CACR_STATUS), %a3 /* CACR */ | |
146 | move.l %d0, (%a1) | |
147 | move.l %d0, (%a2) | |
148 | move.l %d0, (%a3) | |
149 | ||
150 | /* invalidate and disable cache */ | |
151 | move.l #0x01000000, %d0 /* Invalidate cache cmd */ | |
152 | movec %d0, %CACR /* Invalidate cache */ | |
153 | move.l #0, %d0 | |
154 | movec %d0, %ACR0 | |
155 | movec %d0, %ACR1 | |
156 | ||
157 | /* set stackpointer to end of internal ram to get some stackspace for | |
158 | the first c-code */ | |
6d0f6bcf | 159 | move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp |
c8758102 TL |
160 | clr.l %sp@- |
161 | ||
162 | move.l #__got_start, %a5 /* put relocation table address to a5 */ | |
163 | ||
164 | bsr cpu_init_f /* run low-level CPU init code (from flash) */ | |
165 | bsr board_init_f /* run low-level board init code (from flash) */ | |
166 | ||
167 | /* board_init_f() does not return */ | |
168 | ||
169 | /*------------------------------------------------------------------------------*/ | |
170 | ||
171 | /* | |
172 | * void relocate_code (addr_sp, gd, addr_moni) | |
173 | * | |
174 | * This "function" does not return, instead it continues in RAM | |
175 | * after relocating the monitor code. | |
176 | * | |
177 | * r3 = dest | |
178 | * r4 = src | |
179 | * r5 = length in bytes | |
180 | * r6 = cachelinesize | |
181 | */ | |
182 | .globl relocate_code | |
183 | relocate_code: | |
184 | link.w %a6,#0 | |
185 | move.l 8(%a6), %sp /* set new stack pointer */ | |
186 | ||
187 | move.l 12(%a6), %d0 /* Save copy of Global Data pointer */ | |
188 | move.l 16(%a6), %a0 /* Save copy of Destination Address */ | |
189 | ||
6d0f6bcf | 190 | move.l #CONFIG_SYS_MONITOR_BASE, %a1 |
c8758102 TL |
191 | move.l #__init_end, %a2 |
192 | move.l %a0, %a3 | |
193 | ||
194 | /* copy the code to RAM */ | |
195 | 1: | |
196 | move.l (%a1)+, (%a3)+ | |
197 | cmp.l %a1,%a2 | |
198 | bgt.s 1b | |
199 | ||
200 | /* | |
201 | * We are done. Do not return, instead branch to second part of board | |
202 | * initialization, now running from RAM. | |
203 | */ | |
204 | move.l %a0, %a1 | |
6d0f6bcf | 205 | add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1 |
c8758102 TL |
206 | jmp (%a1) |
207 | ||
208 | in_ram: | |
209 | ||
210 | clear_bss: | |
211 | /* | |
212 | * Now clear BSS segment | |
213 | */ | |
214 | move.l %a0, %a1 | |
6d0f6bcf | 215 | add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1 |
c8758102 | 216 | move.l %a0, %d1 |
6d0f6bcf | 217 | add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1 |
c8758102 TL |
218 | 6: |
219 | clr.l (%a1)+ | |
220 | cmp.l %a1,%d1 | |
221 | bgt.s 6b | |
222 | ||
223 | /* | |
224 | * fix got table in RAM | |
225 | */ | |
226 | move.l %a0, %a1 | |
6d0f6bcf | 227 | add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1 |
c8758102 TL |
228 | move.l %a1,%a5 /* * fix got pointer register a5 */ |
229 | ||
230 | move.l %a0, %a2 | |
6d0f6bcf | 231 | add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2 |
c8758102 TL |
232 | |
233 | 7: | |
234 | move.l (%a1),%d1 | |
235 | sub.l #_start,%d1 | |
236 | add.l %a0,%d1 | |
237 | move.l %d1,(%a1)+ | |
238 | cmp.l %a2, %a1 | |
239 | bne 7b | |
240 | ||
241 | /* calculate relative jump to board_init_r in ram */ | |
242 | move.l %a0, %a1 | |
6d0f6bcf | 243 | add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1 |
c8758102 TL |
244 | |
245 | /* set parameters for board_init_r */ | |
246 | move.l %a0,-(%sp) /* dest_addr */ | |
247 | move.l %d0,-(%sp) /* gd */ | |
248 | jsr (%a1) | |
249 | ||
250 | /*------------------------------------------------------------------------------*/ | |
251 | /* exception code */ | |
252 | .globl _fault | |
253 | _fault: | |
254 | jmp _fault | |
255 | .globl _exc_handler | |
256 | ||
257 | _exc_handler: | |
258 | SAVE_ALL | |
259 | movel %sp,%sp@- | |
260 | bsr exc_handler | |
261 | addql #4,%sp | |
262 | RESTORE_ALL | |
263 | ||
264 | .globl _int_handler | |
265 | _int_handler: | |
266 | SAVE_ALL | |
267 | movel %sp,%sp@- | |
268 | bsr int_handler | |
269 | addql #4,%sp | |
270 | RESTORE_ALL | |
271 | ||
272 | /*------------------------------------------------------------------------------*/ | |
273 | /* cache functions */ | |
274 | .globl icache_enable | |
275 | icache_enable: | |
276 | move.l #0x01200000, %d0 /* Invalid cache */ | |
277 | movec %d0, %CACR | |
278 | ||
6d0f6bcf | 279 | move.l #(CONFIG_SYS_SDRAM_BASE + 0x1c000), %d0 |
c8758102 TL |
280 | movec %d0, %ACR0 |
281 | ||
282 | move.l #0x81600610, %d0 /* Enable cache */ | |
283 | movec %d0, %CACR | |
284 | ||
285 | move.l #(ICACHE_STATUS), %a1 | |
286 | moveq #1, %d0 | |
287 | move.l %d0, (%a1) | |
288 | rts | |
289 | ||
290 | .globl icache_disable | |
291 | icache_disable: | |
292 | move.l #0x01F00000, %d0 /* Setup cache mask */ | |
293 | movec %d0, %CACR /* Invalidate icache */ | |
294 | clr.l %d0 | |
295 | movec %d0, %ACR0 | |
296 | movec %d0, %ACR1 | |
297 | ||
298 | move.l #(ICACHE_STATUS), %a1 | |
299 | moveq #0, %d0 | |
300 | move.l %d0, (%a1) | |
301 | rts | |
302 | ||
303 | .globl icache_status | |
304 | icache_status: | |
305 | move.l #(ICACHE_STATUS), %a1 | |
306 | move.l (%a1), %d0 | |
307 | rts | |
308 | ||
309 | .globl icache_invalid | |
310 | icache_invalid: | |
311 | move.l #0x80600610, %d0 /* Invalidate icache */ | |
312 | movec %d0, %CACR /* Enable and invalidate cache */ | |
313 | rts | |
314 | ||
315 | .globl dcache_enable | |
316 | dcache_enable: | |
317 | move.l #0x01200000, %d0 /* Invalid cache */ | |
318 | movec %d0, %CACR | |
319 | ||
320 | move.l #0x81300610, %d0 | |
321 | movec %d0, %CACR | |
322 | ||
323 | move.l #(DCACHE_STATUS), %a1 | |
324 | moveq #1, %d0 | |
325 | move.l %d0, (%a1) | |
326 | rts | |
327 | ||
328 | .globl dcache_disable | |
329 | dcache_disable: | |
330 | move.l #0x81600610, %d0 /* Setup cache mask */ | |
331 | movec %d0, %CACR /* Invalidate icache */ | |
332 | ||
333 | move.l #(DCACHE_STATUS), %a1 | |
334 | moveq #0, %d0 | |
335 | move.l %d0, (%a1) | |
336 | rts | |
337 | ||
338 | .globl dcache_invalid | |
339 | dcache_invalid: | |
340 | move.l #0x81100610, %d0 /* Setup cache mask */ | |
341 | movec %d0, %CACR /* Enable and invalidate cache */ | |
342 | rts | |
343 | ||
344 | .globl dcache_status | |
345 | dcache_status: | |
346 | move.l #(DCACHE_STATUS), %a1 | |
347 | move.l (%a1), %d0 | |
348 | rts | |
349 | ||
350 | /*------------------------------------------------------------------------------*/ | |
351 | ||
352 | .globl version_string | |
353 | version_string: | |
354 | .ascii U_BOOT_VERSION | |
355 | .ascii " (", __DATE__, " - ", __TIME__, ")" | |
356 | .ascii CONFIG_IDENT_STRING, "\0" | |
9b46432f | 357 | .align 4 |