1 | /*===============================================================*\ |
---|
2 | | Project: RTEMS generic mcf548x BSP | |
---|
3 | +-----------------------------------------------------------------+ |
---|
4 | | File: start.S | |
---|
5 | +-----------------------------------------------------------------+ |
---|
6 | | The file contains the assembly part of MCF548x init code | |
---|
7 | +-----------------------------------------------------------------+ |
---|
8 | | Copyright (c) 2007 | |
---|
9 | | Embedded Brains GmbH | |
---|
10 | | Obere Lagerstr. 30 | |
---|
11 | | D-82178 Puchheim | |
---|
12 | | Germany | |
---|
13 | | rtems@embedded-brains.de | |
---|
14 | +-----------------------------------------------------------------+ |
---|
15 | | | |
---|
16 | | Parts of the code has been derived from the "dBUG source code" | |
---|
17 | | package Freescale is providing for M548X EVBs. The usage of | |
---|
18 | | the modified or unmodified code and it's integration into the | |
---|
19 | | generic mcf548x BSP has been done according to the Freescale | |
---|
20 | | license terms. | |
---|
21 | | | |
---|
22 | | The Freescale license terms can be reviewed in the file | |
---|
23 | | | |
---|
24 | | Freescale_license.txt | |
---|
25 | | | |
---|
26 | +-----------------------------------------------------------------+ |
---|
27 | | | |
---|
28 | | The generic mcf548x BSP has been developed on the basic | |
---|
29 | | structures and modules of the av5282 BSP. | |
---|
30 | | | |
---|
31 | +-----------------------------------------------------------------+ |
---|
32 | | | |
---|
33 | | The license and distribution terms for this file may be | |
---|
34 | | found in the file LICENSE in this distribution or at | |
---|
35 | | | |
---|
36 | | http://www.rtems.org/license/LICENSE. | |
---|
37 | | | |
---|
38 | +-----------------------------------------------------------------+ |
---|
39 | | | |
---|
40 | | date history ID | |
---|
41 | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
---|
42 | | 12.11.07 1.0 ras | |
---|
43 | | | |
---|
44 | \*===============================================================*/ |
---|
45 | |
---|
46 | /*===============================================================*\ |
---|
47 | | Includes | |
---|
48 | \*===============================================================*/ |
---|
49 | #include <rtems/asm.h> |
---|
50 | #include <bsp/linker-symbols.h> |
---|
51 | |
---|
52 | /*===============================================================*\ |
---|
53 | | External references | |
---|
54 | \*===============================================================*/ |
---|
55 | .extern __MBAR |
---|
56 | .extern _CoreSramBase0 |
---|
57 | .extern _CoreSramBase1 |
---|
58 | .extern _CoreSramSize1 |
---|
59 | .extern mcf548x_init |
---|
60 | .extern boot_card |
---|
61 | |
---|
62 | /*===============================================================*\ |
---|
63 | | Global symbols | |
---|
64 | \*===============================================================*/ |
---|
65 | |
---|
66 | .global interrupt_vector_table |
---|
67 | .global spurious_int_count |
---|
68 | .global start |
---|
69 | |
---|
70 | |
---|
71 | /*===============================================================*\ |
---|
72 | | Exception Table | |
---|
73 | \*===============================================================*/ |
---|
74 | |
---|
75 | .section ".vectors","ax" /* begin of vectors section */ |
---|
76 | PUBLIC (InterruptVectorTable) |
---|
77 | SYM(InterruptVectorTable): |
---|
78 | INITSP: .long _ISR_Stack_area_end /* Initial SP */ |
---|
79 | INITPC: .long start /* Initial PC */ |
---|
80 | vector002: .long asm_default_interrupt /* Access Error */ |
---|
81 | vector003: .long asm_default_interrupt /* Address Error */ |
---|
82 | vector004: .long asm_default_interrupt /* Illegal Instruction */ |
---|
83 | vector005: .long asm_default_interrupt /* Reserved */ |
---|
84 | vector006: .long asm_default_interrupt /* Reserved */ |
---|
85 | vector007: .long asm_default_interrupt /* Reserved */ |
---|
86 | vector008: .long asm_default_interrupt /* Privilege Violation */ |
---|
87 | vector009: .long asm_default_interrupt /* Trace */ |
---|
88 | vector010: .long asm_default_interrupt /* Unimplemented A-Line */ |
---|
89 | vector011: .long asm_default_interrupt /* Unimplemented F-Line */ |
---|
90 | vector012: .long asm_default_interrupt /* Debug Interrupt */ |
---|
91 | vector013: .long asm_default_interrupt /* Reserved */ |
---|
92 | vector014: .long asm_default_interrupt /* Format Error */ |
---|
93 | vector015: .long asm_default_interrupt /* Unitialized Int. */ |
---|
94 | vector016: .long asm_default_interrupt /* Reserved */ |
---|
95 | vector017: .long asm_default_interrupt /* Reserved */ |
---|
96 | vector018: .long asm_default_interrupt /* Reserved */ |
---|
97 | vector019: .long asm_default_interrupt /* Reserved */ |
---|
98 | vector020: .long asm_default_interrupt /* Reserved */ |
---|
99 | vector021: .long asm_default_interrupt /* Reserved */ |
---|
100 | vector022: .long asm_default_interrupt /* Reserved */ |
---|
101 | vector023: .long asm_default_interrupt /* Reserved */ |
---|
102 | vector024: .long asm_spurious_interrupt /* Spurious Interrupt */ |
---|
103 | vector025: .long asm_default_interrupt /* Autovector Level 1 */ |
---|
104 | vector026: .long asm_default_interrupt /* Autovector Level 2 */ |
---|
105 | vector027: .long asm_default_interrupt /* Autovector Level 3 */ |
---|
106 | vector028: .long asm_default_interrupt /* Autovector Level 4 */ |
---|
107 | vector029: .long asm_default_interrupt /* Autovector Level 5 */ |
---|
108 | vector030: .long asm_default_interrupt /* Autovector Level 6 */ |
---|
109 | vector031: .long asm_default_interrupt /* Autovector Level 7 */ |
---|
110 | vector032: .long asm_default_interrupt /* TRAP #0 */ |
---|
111 | vector033: .long asm_default_interrupt /* TRAP #1 */ |
---|
112 | vector034: .long asm_default_interrupt /* TRAP #2 */ |
---|
113 | vector035: .long asm_default_interrupt /* TRAP #3 */ |
---|
114 | vector036: .long asm_default_interrupt /* TRAP #4 */ |
---|
115 | vector037: .long asm_default_interrupt /* TRAP #5 */ |
---|
116 | vector038: .long asm_default_interrupt /* TRAP #6 */ |
---|
117 | vector039: .long asm_default_interrupt /* TRAP #7 */ |
---|
118 | vector040: .long asm_default_interrupt /* TRAP #8 */ |
---|
119 | vector041: .long asm_default_interrupt /* TRAP #9 */ |
---|
120 | vector042: .long asm_default_interrupt /* TRAP #10 */ |
---|
121 | vector043: .long asm_default_interrupt /* TRAP #11 */ |
---|
122 | vector044: .long asm_default_interrupt /* TRAP #12 */ |
---|
123 | vector045: .long asm_default_interrupt /* TRAP #13 */ |
---|
124 | vector046: .long asm_default_interrupt /* TRAP #14 */ |
---|
125 | vector047: .long asm_default_interrupt /* TRAP #15 */ |
---|
126 | vector048: .long asm_default_interrupt /* Reserved */ |
---|
127 | vector049: .long asm_default_interrupt /* Reserved */ |
---|
128 | vector050: .long asm_default_interrupt /* Reserved */ |
---|
129 | vector051: .long asm_default_interrupt /* Reserved */ |
---|
130 | vector052: .long asm_default_interrupt /* Reserved */ |
---|
131 | vector053: .long asm_default_interrupt /* Reserved */ |
---|
132 | vector054: .long asm_default_interrupt /* Reserved */ |
---|
133 | vector055: .long asm_default_interrupt /* Reserved */ |
---|
134 | vector056: .long asm_default_interrupt /* Reserved */ |
---|
135 | vector057: .long asm_default_interrupt /* Reserved */ |
---|
136 | vector058: .long asm_default_interrupt /* Reserved */ |
---|
137 | vector059: .long asm_default_interrupt /* Reserved */ |
---|
138 | vector060: .long asm_default_interrupt /* Reserved */ |
---|
139 | vector061: .long asm_default_interrupt /* Reserved */ |
---|
140 | vector062: .long asm_default_interrupt /* Reserved */ |
---|
141 | vector063: .long asm_default_interrupt /* Reserved */ |
---|
142 | vector064: .long asm_default_interrupt |
---|
143 | vector065: .long asm_default_interrupt |
---|
144 | vector066: .long asm_default_interrupt |
---|
145 | vector067: .long asm_default_interrupt |
---|
146 | vector068: .long asm_default_interrupt |
---|
147 | vector069: .long asm_default_interrupt |
---|
148 | vector070: .long asm_default_interrupt |
---|
149 | vector071: .long asm_default_interrupt |
---|
150 | vector072: .long asm_default_interrupt |
---|
151 | vector073: .long asm_default_interrupt |
---|
152 | vector074: .long asm_default_interrupt |
---|
153 | vector075: .long asm_default_interrupt |
---|
154 | vector076: .long asm_default_interrupt |
---|
155 | vector077: .long asm_default_interrupt |
---|
156 | vector078: .long asm_default_interrupt |
---|
157 | vector079: .long asm_default_interrupt |
---|
158 | vector080: .long asm_default_interrupt |
---|
159 | vector081: .long asm_default_interrupt |
---|
160 | vector082: .long asm_default_interrupt |
---|
161 | vector083: .long asm_default_interrupt |
---|
162 | vector084: .long asm_default_interrupt |
---|
163 | vector085: .long asm_default_interrupt |
---|
164 | vector086: .long asm_default_interrupt |
---|
165 | vector087: .long asm_default_interrupt |
---|
166 | vector088: .long asm_default_interrupt |
---|
167 | vector089: .long asm_default_interrupt |
---|
168 | vector090: .long asm_default_interrupt |
---|
169 | vector091: .long asm_default_interrupt |
---|
170 | vector092: .long asm_default_interrupt |
---|
171 | vector093: .long asm_default_interrupt |
---|
172 | vector094: .long asm_default_interrupt |
---|
173 | vector095: .long asm_default_interrupt |
---|
174 | vector096: .long asm_default_interrupt |
---|
175 | vector097: .long asm_default_interrupt |
---|
176 | vector098: .long asm_default_interrupt |
---|
177 | vector099: .long asm_default_interrupt |
---|
178 | vector100: .long asm_default_interrupt |
---|
179 | vector101: .long asm_default_interrupt |
---|
180 | vector102: .long asm_default_interrupt |
---|
181 | vector103: .long asm_default_interrupt |
---|
182 | vector104: .long asm_default_interrupt |
---|
183 | vector105: .long asm_default_interrupt |
---|
184 | vector106: .long asm_default_interrupt |
---|
185 | vector107: .long asm_default_interrupt |
---|
186 | vector108: .long asm_default_interrupt |
---|
187 | vector109: .long asm_default_interrupt |
---|
188 | vector110: .long asm_default_interrupt |
---|
189 | vector111: .long asm_default_interrupt |
---|
190 | vector112: .long asm_default_interrupt |
---|
191 | vector113: .long asm_default_interrupt |
---|
192 | vector114: .long asm_default_interrupt |
---|
193 | vector115: .long asm_default_interrupt |
---|
194 | vector116: .long asm_default_interrupt |
---|
195 | vector117: .long asm_default_interrupt |
---|
196 | vector118: .long asm_default_interrupt |
---|
197 | vector119: .long asm_default_interrupt |
---|
198 | vector120: .long asm_default_interrupt |
---|
199 | vector121: .long asm_default_interrupt |
---|
200 | vector122: .long asm_default_interrupt |
---|
201 | vector123: .long asm_default_interrupt |
---|
202 | vector124: .long asm_default_interrupt |
---|
203 | vector125: .long asm_default_interrupt |
---|
204 | vector126: .long asm_default_interrupt |
---|
205 | vector127: .long asm_default_interrupt |
---|
206 | vector128: .long asm_default_interrupt |
---|
207 | vector129: .long asm_default_interrupt |
---|
208 | vector130: .long asm_default_interrupt |
---|
209 | vector131: .long asm_default_interrupt |
---|
210 | vector132: .long asm_default_interrupt |
---|
211 | vector133: .long asm_default_interrupt |
---|
212 | vector134: .long asm_default_interrupt |
---|
213 | vector135: .long asm_default_interrupt |
---|
214 | vector136: .long asm_default_interrupt |
---|
215 | vector137: .long asm_default_interrupt |
---|
216 | vector138: .long asm_default_interrupt |
---|
217 | vector139: .long asm_default_interrupt |
---|
218 | vector140: .long asm_default_interrupt |
---|
219 | vector141: .long asm_default_interrupt |
---|
220 | vector142: .long asm_default_interrupt |
---|
221 | vector143: .long asm_default_interrupt |
---|
222 | vector144: .long asm_default_interrupt |
---|
223 | vector145: .long asm_default_interrupt |
---|
224 | vector146: .long asm_default_interrupt |
---|
225 | vector147: .long asm_default_interrupt |
---|
226 | vector148: .long asm_default_interrupt |
---|
227 | vector149: .long asm_default_interrupt |
---|
228 | vector150: .long asm_default_interrupt |
---|
229 | vector151: .long asm_default_interrupt |
---|
230 | vector152: .long asm_default_interrupt |
---|
231 | vector153: .long asm_default_interrupt |
---|
232 | vector154: .long asm_default_interrupt |
---|
233 | vector155: .long asm_default_interrupt |
---|
234 | vector156: .long asm_default_interrupt |
---|
235 | vector157: .long asm_default_interrupt |
---|
236 | vector158: .long asm_default_interrupt |
---|
237 | vector159: .long asm_default_interrupt |
---|
238 | vector160: .long asm_default_interrupt |
---|
239 | vector161: .long asm_default_interrupt |
---|
240 | vector162: .long asm_default_interrupt |
---|
241 | vector163: .long asm_default_interrupt |
---|
242 | vector164: .long asm_default_interrupt |
---|
243 | vector165: .long asm_default_interrupt |
---|
244 | vector166: .long asm_default_interrupt |
---|
245 | vector167: .long asm_default_interrupt |
---|
246 | vector168: .long asm_default_interrupt |
---|
247 | vector169: .long asm_default_interrupt |
---|
248 | vector170: .long asm_default_interrupt |
---|
249 | vector171: .long asm_default_interrupt |
---|
250 | vector172: .long asm_default_interrupt |
---|
251 | vector173: .long asm_default_interrupt |
---|
252 | vector174: .long asm_default_interrupt |
---|
253 | vector175: .long asm_default_interrupt |
---|
254 | vector176: .long asm_default_interrupt |
---|
255 | vector177: .long asm_default_interrupt |
---|
256 | vector178: .long asm_default_interrupt |
---|
257 | vector179: .long asm_default_interrupt |
---|
258 | vector180: .long asm_default_interrupt |
---|
259 | vector181: .long asm_default_interrupt |
---|
260 | vector182: .long asm_default_interrupt |
---|
261 | vector183: .long asm_default_interrupt |
---|
262 | vector184: .long asm_default_interrupt |
---|
263 | vector185: .long asm_default_interrupt |
---|
264 | vector186: .long asm_default_interrupt |
---|
265 | vector187: .long asm_default_interrupt |
---|
266 | vector188: .long asm_default_interrupt |
---|
267 | vector189: .long asm_default_interrupt |
---|
268 | vector190: .long asm_default_interrupt |
---|
269 | vector191: .long asm_default_interrupt |
---|
270 | vector192: .long asm_default_interrupt |
---|
271 | vector193: .long asm_default_interrupt |
---|
272 | vector194: .long asm_default_interrupt |
---|
273 | vector195: .long asm_default_interrupt |
---|
274 | vector196: .long asm_default_interrupt |
---|
275 | vector197: .long asm_default_interrupt |
---|
276 | vector198: .long asm_default_interrupt |
---|
277 | vector199: .long asm_default_interrupt |
---|
278 | vector200: .long asm_default_interrupt |
---|
279 | vector201: .long asm_default_interrupt |
---|
280 | vector202: .long asm_default_interrupt |
---|
281 | vector203: .long asm_default_interrupt |
---|
282 | vector204: .long asm_default_interrupt |
---|
283 | vector205: .long asm_default_interrupt |
---|
284 | vector206: .long asm_default_interrupt |
---|
285 | vector207: .long asm_default_interrupt |
---|
286 | vector208: .long asm_default_interrupt |
---|
287 | vector209: .long asm_default_interrupt |
---|
288 | vector210: .long asm_default_interrupt |
---|
289 | vector211: .long asm_default_interrupt |
---|
290 | vector212: .long asm_default_interrupt |
---|
291 | vector213: .long asm_default_interrupt |
---|
292 | vector214: .long asm_default_interrupt |
---|
293 | vector215: .long asm_default_interrupt |
---|
294 | vector216: .long asm_default_interrupt |
---|
295 | vector217: .long asm_default_interrupt |
---|
296 | vector218: .long asm_default_interrupt |
---|
297 | vector219: .long asm_default_interrupt |
---|
298 | vector220: .long asm_default_interrupt |
---|
299 | vector221: .long asm_default_interrupt |
---|
300 | vector222: .long asm_default_interrupt |
---|
301 | vector223: .long asm_default_interrupt |
---|
302 | vector224: .long asm_default_interrupt |
---|
303 | vector225: .long asm_default_interrupt |
---|
304 | vector226: .long asm_default_interrupt |
---|
305 | vector227: .long asm_default_interrupt |
---|
306 | vector228: .long asm_default_interrupt |
---|
307 | vector229: .long asm_default_interrupt |
---|
308 | vector230: .long asm_default_interrupt |
---|
309 | vector231: .long asm_default_interrupt |
---|
310 | vector232: .long asm_default_interrupt |
---|
311 | vector233: .long asm_default_interrupt |
---|
312 | vector234: .long asm_default_interrupt |
---|
313 | vector235: .long asm_default_interrupt |
---|
314 | vector236: .long asm_default_interrupt |
---|
315 | vector237: .long asm_default_interrupt |
---|
316 | vector238: .long asm_default_interrupt |
---|
317 | vector239: .long asm_default_interrupt |
---|
318 | vector240: .long asm_default_interrupt |
---|
319 | vector241: .long asm_default_interrupt |
---|
320 | vector242: .long asm_default_interrupt |
---|
321 | vector243: .long asm_default_interrupt |
---|
322 | vector244: .long asm_default_interrupt |
---|
323 | vector245: .long asm_default_interrupt |
---|
324 | vector246: .long asm_default_interrupt |
---|
325 | vector247: .long asm_default_interrupt |
---|
326 | vector248: .long asm_default_interrupt |
---|
327 | vector249: .long asm_default_interrupt |
---|
328 | vector250: .long asm_default_interrupt |
---|
329 | vector251: .long asm_default_interrupt |
---|
330 | vector252: .long asm_default_interrupt |
---|
331 | vector253: .long asm_default_interrupt |
---|
332 | vector254: .long asm_default_interrupt |
---|
333 | vector255: .long asm_default_interrupt |
---|
334 | |
---|
335 | /*===============================================================*\ |
---|
336 | | Start of code | |
---|
337 | \*===============================================================*/ |
---|
338 | .text |
---|
339 | PUBLIC (start) |
---|
340 | SYM(start): |
---|
341 | move.w #0x3700,sr /* disable interrupts */ |
---|
342 | jmp start_init |
---|
343 | |
---|
344 | /*===============================================================*\ |
---|
345 | | Sspurious interrupt counter | |
---|
346 | \*===============================================================*/ |
---|
347 | .align 4 |
---|
348 | .data /* begin of data section */ |
---|
349 | PUBLIC (spurious_int_count) |
---|
350 | SYM(spurious_int_count): |
---|
351 | .long 0 /* spurious interrupt counter */ |
---|
352 | |
---|
353 | /*===============================================================*\ |
---|
354 | | Function: Default exception handler | |
---|
355 | +-----------------------------------------------------------------+ |
---|
356 | | - stop and disable all interrupts | |
---|
357 | | - loop forever | |
---|
358 | \*===============================================================*/ |
---|
359 | .text /* start of text section */ |
---|
360 | .align 4 |
---|
361 | PUBLIC (asm_default_interrupt) |
---|
362 | SYM(asm_default_interrupt): |
---|
363 | nop |
---|
364 | stop #0x3700 /* stop */ |
---|
365 | bra.w asm_default_interrupt /* loop forever */ |
---|
366 | |
---|
367 | /*===============================================================*\ |
---|
368 | | Function: Exception handler for spurious interrupts | |
---|
369 | +-----------------------------------------------------------------+ |
---|
370 | | - count spurious interrupts | |
---|
371 | \*===============================================================*/ |
---|
372 | .align 4 |
---|
373 | PUBLIC (asm_spurious_interrupt) |
---|
374 | SYM(asm_spurious_interrupt): |
---|
375 | add.l #1,spurious_int_count |
---|
376 | rte |
---|
377 | |
---|
378 | /*===============================================================*\ |
---|
379 | | Function: start_init | |
---|
380 | +-----------------------------------------------------------------+ |
---|
381 | | - Disable all intterupts | |
---|
382 | | - Setup the internal SRAM | |
---|
383 | | - Initialize mcf548x peripherals | |
---|
384 | | - Set initial stack pointer | |
---|
385 | | - Boot RTEMS |
---|
386 | \*===============================================================*/ |
---|
387 | .align 4 |
---|
388 | PUBLIC (start_init) |
---|
389 | SYM(start_init): |
---|
390 | |
---|
391 | move.l #0x01040100,d0 /* invalidate instruction/data/branch cache, disable all caches */ |
---|
392 | movec d0,cacr |
---|
393 | |
---|
394 | move.l #_CoreSramBase0,d0 /* initialize RAMBAR0 */ |
---|
395 | add.l #0x21,d0 /* for code & data */ |
---|
396 | movec d0,rambar0 |
---|
397 | |
---|
398 | move.l #_CoreSramBase1,d0 /* initialize RAMBAR1 */ |
---|
399 | add.l #0x21,d0 /* for code & data */ |
---|
400 | movec d0,rambar1 /* movec d0,RAMBAR1 */ |
---|
401 | |
---|
402 | move.l #__MBAR,d0 /* initialize MBAR */ |
---|
403 | movec d0,mbar |
---|
404 | |
---|
405 | move.l #_CoreSramBase1,d0 /* set sp to end of Core SRAM temporarily */ |
---|
406 | add.l #_CoreSramSize1,d0 |
---|
407 | move.l d0,sp |
---|
408 | |
---|
409 | move.l #0,d0 /* initialize frame pointer */ |
---|
410 | movea.l d0,a6 |
---|
411 | |
---|
412 | jsr mcf548x_init /* Initialize mcf548x peripherals */ |
---|
413 | |
---|
414 | move.l #_ISR_Stack_area_end,sp /* relocate sp */ |
---|
415 | |
---|
416 | clrl d0 /* clear d0 */ |
---|
417 | movel d0,a7@- /* command line == 0 */ |
---|
418 | |
---|
419 | jsr boot_card /* boot rtems */ |
---|
420 | |
---|
421 | movel a7@+,d0 |
---|
422 | |
---|
423 | exit_multitasking: |
---|
424 | nop |
---|
425 | nop |
---|
426 | halt |
---|
427 | bra exit_multitasking |
---|
428 | |
---|
429 | .end /* end of start.S module */ |
---|
430 | |
---|
431 | |
---|
432 | |
---|