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start.S @ 69effbb4

4.104.114.95

Last change on this file since 69effbb4 was 69effbb4, checked in by Thomas Doerfler <Thomas.Doerfler@…>, on 07/11/08 at 10:00:41
added variant to gen68360 BSP added genmcf548x BSP
Property mode set to `100644`
File size: 18.7 KB

Line
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.com/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
51	/===============================================================\
52	\| External references \|
53	\===============================================================/
54	.extern __MBAR
55	.extern _CoreSramBase0
56	.extern _CoreSramBase1
57	.extern _CoreSramSize1
58	.extern mcf548x_init
59	.extern boot_card
60	.extern _SpInit
61	.extern _InitPc
62
63	/===============================================================\
64	\| Global symbols \|
65	\===============================================================/
66
67	.global interrupt_vector_table
68	.global spurious_int_count
69	.global start
70
71
72	/===============================================================\
73	\| Exception Table \|
74	\===============================================================/
75
76	.section ".vectors","ax" /* begin of vectors section */
77	PUBLIC (InterruptVectorTable)
78	SYM(InterruptVectorTable):
79	INITSP: .long _SpInit /* Initial SP */
80	INITPC: .long _InitPc /* Initial PC */
81	vector002: .long asm_default_interrupt /* Access Error */
82	vector003: .long asm_default_interrupt /* Address Error */
83	vector004: .long asm_default_interrupt /* Illegal Instruction */
84	vector005: .long asm_default_interrupt /* Reserved */
85	vector006: .long asm_default_interrupt /* Reserved */
86	vector007: .long asm_default_interrupt /* Reserved */
87	vector008: .long asm_default_interrupt /* Privilege Violation */
88	vector009: .long asm_default_interrupt /* Trace */
89	vector010: .long asm_default_interrupt /* Unimplemented A-Line */
90	vector011: .long asm_default_interrupt /* Unimplemented F-Line */
91	vector012: .long asm_default_interrupt /* Debug Interrupt */
92	vector013: .long asm_default_interrupt /* Reserved */
93	vector014: .long asm_default_interrupt /* Format Error */
94	vector015: .long asm_default_interrupt /* Unitialized Int. */
95	vector016: .long asm_default_interrupt /* Reserved */
96	vector017: .long asm_default_interrupt /* Reserved */
97	vector018: .long asm_default_interrupt /* Reserved */
98	vector019: .long asm_default_interrupt /* Reserved */
99	vector020: .long asm_default_interrupt /* Reserved */
100	vector021: .long asm_default_interrupt /* Reserved */
101	vector022: .long asm_default_interrupt /* Reserved */
102	vector023: .long asm_default_interrupt /* Reserved */
103	vector024: .long asm_spurious_interrupt /* Spurious Interrupt */
104	vector025: .long asm_default_interrupt /* Autovector Level 1 */
105	vector026: .long asm_default_interrupt /* Autovector Level 2 */
106	vector027: .long asm_default_interrupt /* Autovector Level 3 */
107	vector028: .long asm_default_interrupt /* Autovector Level 4 */
108	vector029: .long asm_default_interrupt /* Autovector Level 5 */
109	vector030: .long asm_default_interrupt /* Autovector Level 6 */
110	vector031: .long asm_default_interrupt /* Autovector Level 7 */
111	vector032: .long asm_default_interrupt /* TRAP #0 */
112	vector033: .long asm_default_interrupt /* TRAP #1 */
113	vector034: .long asm_default_interrupt /* TRAP #2 */
114	vector035: .long asm_default_interrupt /* TRAP #3 */
115	vector036: .long asm_default_interrupt /* TRAP #4 */
116	vector037: .long asm_default_interrupt /* TRAP #5 */
117	vector038: .long asm_default_interrupt /* TRAP #6 */
118	vector039: .long asm_default_interrupt /* TRAP #7 */
119	vector040: .long asm_default_interrupt /* TRAP #8 */
120	vector041: .long asm_default_interrupt /* TRAP #9 */
121	vector042: .long asm_default_interrupt /* TRAP #10 */
122	vector043: .long asm_default_interrupt /* TRAP #11 */
123	vector044: .long asm_default_interrupt /* TRAP #12 */
124	vector045: .long asm_default_interrupt /* TRAP #13 */
125	vector046: .long asm_default_interrupt /* TRAP #14 */
126	vector047: .long asm_default_interrupt /* TRAP #15 */
127	vector048: .long asm_default_interrupt /* Reserved */
128	vector049: .long asm_default_interrupt /* Reserved */
129	vector050: .long asm_default_interrupt /* Reserved */
130	vector051: .long asm_default_interrupt /* Reserved */
131	vector052: .long asm_default_interrupt /* Reserved */
132	vector053: .long asm_default_interrupt /* Reserved */
133	vector054: .long asm_default_interrupt /* Reserved */
134	vector055: .long asm_default_interrupt /* Reserved */
135	vector056: .long asm_default_interrupt /* Reserved */
136	vector057: .long asm_default_interrupt /* Reserved */
137	vector058: .long asm_default_interrupt /* Reserved */
138	vector059: .long asm_default_interrupt /* Reserved */
139	vector060: .long asm_default_interrupt /* Reserved */
140	vector061: .long asm_default_interrupt /* Reserved */
141	vector062: .long asm_default_interrupt /* Reserved */
142	vector063: .long asm_default_interrupt /* Reserved */
143	vector064: .long asm_default_interrupt
144	vector065: .long asm_default_interrupt
145	vector066: .long asm_default_interrupt
146	vector067: .long asm_default_interrupt
147	vector068: .long asm_default_interrupt
148	vector069: .long asm_default_interrupt
149	vector070: .long asm_default_interrupt
150	vector071: .long asm_default_interrupt
151	vector072: .long asm_default_interrupt
152	vector073: .long asm_default_interrupt
153	vector074: .long asm_default_interrupt
154	vector075: .long asm_default_interrupt
155	vector076: .long asm_default_interrupt
156	vector077: .long asm_default_interrupt
157	vector078: .long asm_default_interrupt
158	vector079: .long asm_default_interrupt
159	vector080: .long asm_default_interrupt
160	vector081: .long asm_default_interrupt
161	vector082: .long asm_default_interrupt
162	vector083: .long asm_default_interrupt
163	vector084: .long asm_default_interrupt
164	vector085: .long asm_default_interrupt
165	vector086: .long asm_default_interrupt
166	vector087: .long asm_default_interrupt
167	vector088: .long asm_default_interrupt
168	vector089: .long asm_default_interrupt
169	vector090: .long asm_default_interrupt
170	vector091: .long asm_default_interrupt
171	vector092: .long asm_default_interrupt
172	vector093: .long asm_default_interrupt
173	vector094: .long asm_default_interrupt
174	vector095: .long asm_default_interrupt
175	vector096: .long asm_default_interrupt
176	vector097: .long asm_default_interrupt
177	vector098: .long asm_default_interrupt
178	vector099: .long asm_default_interrupt
179	vector100: .long asm_default_interrupt
180	vector101: .long asm_default_interrupt
181	vector102: .long asm_default_interrupt
182	vector103: .long asm_default_interrupt
183	vector104: .long asm_default_interrupt
184	vector105: .long asm_default_interrupt
185	vector106: .long asm_default_interrupt
186	vector107: .long asm_default_interrupt
187	vector108: .long asm_default_interrupt
188	vector109: .long asm_default_interrupt
189	vector110: .long asm_default_interrupt
190	vector111: .long asm_default_interrupt
191	vector112: .long asm_default_interrupt
192	vector113: .long asm_default_interrupt
193	vector114: .long asm_default_interrupt
194	vector115: .long asm_default_interrupt
195	vector116: .long asm_default_interrupt
196	vector117: .long asm_default_interrupt
197	vector118: .long asm_default_interrupt
198	vector119: .long asm_default_interrupt
199	vector120: .long asm_default_interrupt
200	vector121: .long asm_default_interrupt
201	vector122: .long asm_default_interrupt
202	vector123: .long asm_default_interrupt
203	vector124: .long asm_default_interrupt
204	vector125: .long asm_default_interrupt
205	vector126: .long asm_default_interrupt
206	vector127: .long asm_default_interrupt
207	vector128: .long asm_default_interrupt
208	vector129: .long asm_default_interrupt
209	vector130: .long asm_default_interrupt
210	vector131: .long asm_default_interrupt
211	vector132: .long asm_default_interrupt
212	vector133: .long asm_default_interrupt
213	vector134: .long asm_default_interrupt
214	vector135: .long asm_default_interrupt
215	vector136: .long asm_default_interrupt
216	vector137: .long asm_default_interrupt
217	vector138: .long asm_default_interrupt
218	vector139: .long asm_default_interrupt
219	vector140: .long asm_default_interrupt
220	vector141: .long asm_default_interrupt
221	vector142: .long asm_default_interrupt
222	vector143: .long asm_default_interrupt
223	vector144: .long asm_default_interrupt
224	vector145: .long asm_default_interrupt
225	vector146: .long asm_default_interrupt
226	vector147: .long asm_default_interrupt
227	vector148: .long asm_default_interrupt
228	vector149: .long asm_default_interrupt
229	vector150: .long asm_default_interrupt
230	vector151: .long asm_default_interrupt
231	vector152: .long asm_default_interrupt
232	vector153: .long asm_default_interrupt
233	vector154: .long asm_default_interrupt
234	vector155: .long asm_default_interrupt
235	vector156: .long asm_default_interrupt
236	vector157: .long asm_default_interrupt
237	vector158: .long asm_default_interrupt
238	vector159: .long asm_default_interrupt
239	vector160: .long asm_default_interrupt
240	vector161: .long asm_default_interrupt
241	vector162: .long asm_default_interrupt
242	vector163: .long asm_default_interrupt
243	vector164: .long asm_default_interrupt
244	vector165: .long asm_default_interrupt
245	vector166: .long asm_default_interrupt
246	vector167: .long asm_default_interrupt
247	vector168: .long asm_default_interrupt
248	vector169: .long asm_default_interrupt
249	vector170: .long asm_default_interrupt
250	vector171: .long asm_default_interrupt
251	vector172: .long asm_default_interrupt
252	vector173: .long asm_default_interrupt
253	vector174: .long asm_default_interrupt
254	vector175: .long asm_default_interrupt
255	vector176: .long asm_default_interrupt
256	vector177: .long asm_default_interrupt
257	vector178: .long asm_default_interrupt
258	vector179: .long asm_default_interrupt
259	vector180: .long asm_default_interrupt
260	vector181: .long asm_default_interrupt
261	vector182: .long asm_default_interrupt
262	vector183: .long asm_default_interrupt
263	vector184: .long asm_default_interrupt
264	vector185: .long asm_default_interrupt
265	vector186: .long asm_default_interrupt
266	vector187: .long asm_default_interrupt
267	vector188: .long asm_default_interrupt
268	vector189: .long asm_default_interrupt
269	vector190: .long asm_default_interrupt
270	vector191: .long asm_default_interrupt
271	vector192: .long asm_default_interrupt
272	vector193: .long asm_default_interrupt
273	vector194: .long asm_default_interrupt
274	vector195: .long asm_default_interrupt
275	vector196: .long asm_default_interrupt
276	vector197: .long asm_default_interrupt
277	vector198: .long asm_default_interrupt
278	vector199: .long asm_default_interrupt
279	vector200: .long asm_default_interrupt
280	vector201: .long asm_default_interrupt
281	vector202: .long asm_default_interrupt
282	vector203: .long asm_default_interrupt
283	vector204: .long asm_default_interrupt
284	vector205: .long asm_default_interrupt
285	vector206: .long asm_default_interrupt
286	vector207: .long asm_default_interrupt
287	vector208: .long asm_default_interrupt
288	vector209: .long asm_default_interrupt
289	vector210: .long asm_default_interrupt
290	vector211: .long asm_default_interrupt
291	vector212: .long asm_default_interrupt
292	vector213: .long asm_default_interrupt
293	vector214: .long asm_default_interrupt
294	vector215: .long asm_default_interrupt
295	vector216: .long asm_default_interrupt
296	vector217: .long asm_default_interrupt
297	vector218: .long asm_default_interrupt
298	vector219: .long asm_default_interrupt
299	vector220: .long asm_default_interrupt
300	vector221: .long asm_default_interrupt
301	vector222: .long asm_default_interrupt
302	vector223: .long asm_default_interrupt
303	vector224: .long asm_default_interrupt
304	vector225: .long asm_default_interrupt
305	vector226: .long asm_default_interrupt
306	vector227: .long asm_default_interrupt
307	vector228: .long asm_default_interrupt
308	vector229: .long asm_default_interrupt
309	vector230: .long asm_default_interrupt
310	vector231: .long asm_default_interrupt
311	vector232: .long asm_default_interrupt
312	vector233: .long asm_default_interrupt
313	vector234: .long asm_default_interrupt
314	vector235: .long asm_default_interrupt
315	vector236: .long asm_default_interrupt
316	vector237: .long asm_default_interrupt
317	vector238: .long asm_default_interrupt
318	vector239: .long asm_default_interrupt
319	vector240: .long asm_default_interrupt
320	vector241: .long asm_default_interrupt
321	vector242: .long asm_default_interrupt
322	vector243: .long asm_default_interrupt
323	vector244: .long asm_default_interrupt
324	vector245: .long asm_default_interrupt
325	vector246: .long asm_default_interrupt
326	vector247: .long asm_default_interrupt
327	vector248: .long asm_default_interrupt
328	vector249: .long asm_default_interrupt
329	vector250: .long asm_default_interrupt
330	vector251: .long asm_default_interrupt
331	vector252: .long asm_default_interrupt
332	vector253: .long asm_default_interrupt
333	vector254: .long asm_default_interrupt
334	vector255: .long asm_default_interrupt
335
336	/===============================================================\
337	\| Start of code \|
338	\===============================================================/
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 #_SpInit,sp /* relocate sp */
415
416	clrl d0 /* clear d0 */
417	movel d0,a7@- /* environp == NULL */
418	movel d0,a7@- /* argv == NULL */
419	movel d0,a7@- /* argc == 0 */
420
421	jsr boot_card /* boot rtems */
422
423	movel a7@+,d0
424	movel a7@+,d0
425	movel a7@+,d0
426
427	exit_multitasking:
428	nop
429	nop
430	halt
431	bra exit_multitasking
432
433	.end /* end of start.S module */
434
435
436

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