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start.S @ 1d2cfc0

4.104.114.84.95

Last change on this file since 1d2cfc0 was 1d2cfc0, checked in by Joel Sherrill <joel.sherrill@…>, on 11/27/00 at 16:59:57

2000-11-27 Joel Sherrill <joel@…>

start/start.S, startup/bspstart.c: Not functional for CPU32 but hopefully will compile now and give a warning saying that the CPU32 variant needs work.

Property mode set to 100644

File size: 10.3 KB

Rev	Line
[b812f84]	1	/*
	2	* $Id$
	3	*
	4	* Re-written the gen68302 start-up code.
	5	*
	6	* Uses gas syntax only, removed the OAR asm.h.
	7	*
	8	* Supplies a complete vector table in ROM.
	9	*
	10	* Manages all vectors with seperate handlers to trap unhandled
	11	* execptions.
	12	*
	13	* Uses the target specific header file to get the runtime
	14	* configuration
	15	*
	16	* COPYRIGHT (c) 1996
	17	* Objective Design Systems Pty Ltd (ODS)
	18	*
	19	* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
	20	* On-Line Applications Research Corporation (OAR).
	21	* All rights assigned to U.S. Government, 1994.
	22	*
	23	* This material may be reproduced by or for the U.S. Government pursuant
	24	* to the copyright license under the clause at DFARS 252.227-7013. This
	25	* notice must appear in all copies of this file and its derivatives.
	26	*
	27	*/
	28
	29	#define STACK_AT_RESET 0x0
	30
	31	\|
	32	\| Boot boot code in a special section, ld postions
	33	\|
	34	\| Initial stack pointer is in the dual ported RAM
	35	\|
	36	.sect .text
	37
	38	.global _start \| program entry
	39	.global M68Kvec \| Vector Table
	40
	41	_start: \| standard name for program entry
	42	M68Kvec: \| standard location for vectors
	43
	44	\|
	45	\| Make relative, can have the code positioned any where
	46	\|
	47
	48	V___ISSP: .long STACK_AT_RESET
	49	V____IPC: .long start - V___ISSP
	50
	51	\|
	52	\| Create the rest of the vector table to point to the unhandled expection
	53	\| handler
	54	\|
	55	\| Lots of macros, how-ever it creates a simple ROM vector table
	56	\|
	57
[1d2cfc0]	58	#if !defined(mcpu32)
[b812f84]	59	#define MAKE_EXCEPTION_VECTOR(n) V___##n: .long (_CPU_ISR_jump_table + (n * 10))
	60
	61	MAKE_EXCEPTION_VECTOR(2)
	62	MAKE_EXCEPTION_VECTOR(3)
	63	MAKE_EXCEPTION_VECTOR(4)
	64	MAKE_EXCEPTION_VECTOR(5)
	65	MAKE_EXCEPTION_VECTOR(6)
	66	MAKE_EXCEPTION_VECTOR(7)
	67	MAKE_EXCEPTION_VECTOR(8)
	68	MAKE_EXCEPTION_VECTOR(9)
	69
	70	MAKE_EXCEPTION_VECTOR(10)
	71	MAKE_EXCEPTION_VECTOR(11)
	72	MAKE_EXCEPTION_VECTOR(12)
	73	MAKE_EXCEPTION_VECTOR(13)
	74	MAKE_EXCEPTION_VECTOR(14)
	75	MAKE_EXCEPTION_VECTOR(15)
	76	MAKE_EXCEPTION_VECTOR(16)
	77	MAKE_EXCEPTION_VECTOR(17)
	78	MAKE_EXCEPTION_VECTOR(18)
	79	MAKE_EXCEPTION_VECTOR(19)
	80
	81	MAKE_EXCEPTION_VECTOR(20)
	82	MAKE_EXCEPTION_VECTOR(21)
	83	MAKE_EXCEPTION_VECTOR(22)
	84	MAKE_EXCEPTION_VECTOR(23)
	85	MAKE_EXCEPTION_VECTOR(24)
	86	MAKE_EXCEPTION_VECTOR(25)
	87	MAKE_EXCEPTION_VECTOR(26)
	88	MAKE_EXCEPTION_VECTOR(27)
	89	MAKE_EXCEPTION_VECTOR(28)
	90	MAKE_EXCEPTION_VECTOR(29)
	91
	92	MAKE_EXCEPTION_VECTOR(30)
	93	MAKE_EXCEPTION_VECTOR(31)
	94	MAKE_EXCEPTION_VECTOR(32)
	95	MAKE_EXCEPTION_VECTOR(33)
	96	MAKE_EXCEPTION_VECTOR(34)
	97	MAKE_EXCEPTION_VECTOR(35)
	98	MAKE_EXCEPTION_VECTOR(36)
	99	MAKE_EXCEPTION_VECTOR(37)
	100	MAKE_EXCEPTION_VECTOR(38)
	101	MAKE_EXCEPTION_VECTOR(39)
	102
	103	MAKE_EXCEPTION_VECTOR(40)
	104	MAKE_EXCEPTION_VECTOR(41)
	105	MAKE_EXCEPTION_VECTOR(42)
	106	MAKE_EXCEPTION_VECTOR(43)
	107	MAKE_EXCEPTION_VECTOR(44)
	108	MAKE_EXCEPTION_VECTOR(45)
	109	MAKE_EXCEPTION_VECTOR(46)
	110	MAKE_EXCEPTION_VECTOR(47)
	111	MAKE_EXCEPTION_VECTOR(48)
	112	MAKE_EXCEPTION_VECTOR(49)
	113
	114	MAKE_EXCEPTION_VECTOR(50)
	115	MAKE_EXCEPTION_VECTOR(51)
	116	MAKE_EXCEPTION_VECTOR(52)
	117	MAKE_EXCEPTION_VECTOR(53)
	118	MAKE_EXCEPTION_VECTOR(54)
	119	MAKE_EXCEPTION_VECTOR(55)
	120	MAKE_EXCEPTION_VECTOR(56)
	121	MAKE_EXCEPTION_VECTOR(57)
	122	MAKE_EXCEPTION_VECTOR(58)
	123	MAKE_EXCEPTION_VECTOR(59)
	124
	125	MAKE_EXCEPTION_VECTOR(60)
	126	MAKE_EXCEPTION_VECTOR(61)
	127	MAKE_EXCEPTION_VECTOR(62)
	128	MAKE_EXCEPTION_VECTOR(63)
	129	MAKE_EXCEPTION_VECTOR(64)
	130	MAKE_EXCEPTION_VECTOR(65)
	131	MAKE_EXCEPTION_VECTOR(66)
	132	MAKE_EXCEPTION_VECTOR(67)
	133	MAKE_EXCEPTION_VECTOR(68)
	134	MAKE_EXCEPTION_VECTOR(69)
	135
	136	MAKE_EXCEPTION_VECTOR(70)
	137	MAKE_EXCEPTION_VECTOR(71)
	138	MAKE_EXCEPTION_VECTOR(72)
	139	MAKE_EXCEPTION_VECTOR(73)
	140	MAKE_EXCEPTION_VECTOR(74)
	141	MAKE_EXCEPTION_VECTOR(75)
	142	MAKE_EXCEPTION_VECTOR(76)
	143	MAKE_EXCEPTION_VECTOR(77)
	144	MAKE_EXCEPTION_VECTOR(78)
	145	MAKE_EXCEPTION_VECTOR(79)
	146
	147	MAKE_EXCEPTION_VECTOR(80)
	148	MAKE_EXCEPTION_VECTOR(81)
	149	MAKE_EXCEPTION_VECTOR(82)
	150	MAKE_EXCEPTION_VECTOR(83)
	151	MAKE_EXCEPTION_VECTOR(84)
	152	MAKE_EXCEPTION_VECTOR(85)
	153	MAKE_EXCEPTION_VECTOR(86)
	154	MAKE_EXCEPTION_VECTOR(87)
	155	MAKE_EXCEPTION_VECTOR(88)
	156	MAKE_EXCEPTION_VECTOR(89)
	157
	158	MAKE_EXCEPTION_VECTOR(90)
	159	MAKE_EXCEPTION_VECTOR(91)
	160	MAKE_EXCEPTION_VECTOR(92)
	161	MAKE_EXCEPTION_VECTOR(93)
	162	MAKE_EXCEPTION_VECTOR(94)
	163	MAKE_EXCEPTION_VECTOR(95)
	164	MAKE_EXCEPTION_VECTOR(96)
	165	MAKE_EXCEPTION_VECTOR(97)
	166	MAKE_EXCEPTION_VECTOR(98)
	167	MAKE_EXCEPTION_VECTOR(99)
	168
	169	MAKE_EXCEPTION_VECTOR(100)
	170	MAKE_EXCEPTION_VECTOR(101)
	171	MAKE_EXCEPTION_VECTOR(102)
	172	MAKE_EXCEPTION_VECTOR(103)
	173	MAKE_EXCEPTION_VECTOR(104)
	174	MAKE_EXCEPTION_VECTOR(105)
	175	MAKE_EXCEPTION_VECTOR(106)
	176	MAKE_EXCEPTION_VECTOR(107)
	177	MAKE_EXCEPTION_VECTOR(108)
	178	MAKE_EXCEPTION_VECTOR(109)
	179
	180	MAKE_EXCEPTION_VECTOR(110)
	181	MAKE_EXCEPTION_VECTOR(111)
	182	MAKE_EXCEPTION_VECTOR(112)
	183	MAKE_EXCEPTION_VECTOR(113)
	184	MAKE_EXCEPTION_VECTOR(114)
	185	MAKE_EXCEPTION_VECTOR(115)
	186	MAKE_EXCEPTION_VECTOR(116)
	187	MAKE_EXCEPTION_VECTOR(117)
	188	MAKE_EXCEPTION_VECTOR(118)
	189	MAKE_EXCEPTION_VECTOR(119)
	190
	191	MAKE_EXCEPTION_VECTOR(120)
	192	MAKE_EXCEPTION_VECTOR(121)
	193	MAKE_EXCEPTION_VECTOR(122)
	194	MAKE_EXCEPTION_VECTOR(123)
	195	MAKE_EXCEPTION_VECTOR(124)
	196	MAKE_EXCEPTION_VECTOR(125)
	197	MAKE_EXCEPTION_VECTOR(126)
	198	MAKE_EXCEPTION_VECTOR(127)
	199	MAKE_EXCEPTION_VECTOR(128)
	200	MAKE_EXCEPTION_VECTOR(129)
	201
	202	MAKE_EXCEPTION_VECTOR(130)
	203	MAKE_EXCEPTION_VECTOR(131)
	204	MAKE_EXCEPTION_VECTOR(132)
	205	MAKE_EXCEPTION_VECTOR(133)
	206	MAKE_EXCEPTION_VECTOR(134)
	207	MAKE_EXCEPTION_VECTOR(135)
	208	MAKE_EXCEPTION_VECTOR(136)
	209	MAKE_EXCEPTION_VECTOR(137)
	210	MAKE_EXCEPTION_VECTOR(138)
	211	MAKE_EXCEPTION_VECTOR(139)
	212
	213	MAKE_EXCEPTION_VECTOR(140)
	214	MAKE_EXCEPTION_VECTOR(141)
	215	MAKE_EXCEPTION_VECTOR(142)
	216	MAKE_EXCEPTION_VECTOR(143)
	217	MAKE_EXCEPTION_VECTOR(144)
	218	MAKE_EXCEPTION_VECTOR(145)
	219	MAKE_EXCEPTION_VECTOR(146)
	220	MAKE_EXCEPTION_VECTOR(147)
	221	MAKE_EXCEPTION_VECTOR(148)
	222	MAKE_EXCEPTION_VECTOR(149)
	223
	224	MAKE_EXCEPTION_VECTOR(150)
	225	MAKE_EXCEPTION_VECTOR(151)
	226	MAKE_EXCEPTION_VECTOR(152)
	227	MAKE_EXCEPTION_VECTOR(153)
	228	MAKE_EXCEPTION_VECTOR(154)
	229	MAKE_EXCEPTION_VECTOR(155)
	230	MAKE_EXCEPTION_VECTOR(156)
	231	MAKE_EXCEPTION_VECTOR(157)
	232	MAKE_EXCEPTION_VECTOR(158)
	233	MAKE_EXCEPTION_VECTOR(159)
	234
	235	MAKE_EXCEPTION_VECTOR(160)
	236	MAKE_EXCEPTION_VECTOR(161)
	237	MAKE_EXCEPTION_VECTOR(162)
	238	MAKE_EXCEPTION_VECTOR(163)
	239	MAKE_EXCEPTION_VECTOR(164)
	240	MAKE_EXCEPTION_VECTOR(165)
	241	MAKE_EXCEPTION_VECTOR(166)
	242	MAKE_EXCEPTION_VECTOR(167)
	243	MAKE_EXCEPTION_VECTOR(168)
	244	MAKE_EXCEPTION_VECTOR(169)
	245
	246	MAKE_EXCEPTION_VECTOR(170)
	247	MAKE_EXCEPTION_VECTOR(171)
	248	MAKE_EXCEPTION_VECTOR(172)
	249	MAKE_EXCEPTION_VECTOR(173)
	250	MAKE_EXCEPTION_VECTOR(174)
	251	MAKE_EXCEPTION_VECTOR(175)
	252	MAKE_EXCEPTION_VECTOR(176)
	253	MAKE_EXCEPTION_VECTOR(177)
	254	MAKE_EXCEPTION_VECTOR(178)
	255	MAKE_EXCEPTION_VECTOR(179)
	256
	257	MAKE_EXCEPTION_VECTOR(180)
	258	MAKE_EXCEPTION_VECTOR(181)
	259	MAKE_EXCEPTION_VECTOR(182)
	260	MAKE_EXCEPTION_VECTOR(183)
	261	MAKE_EXCEPTION_VECTOR(184)
	262	MAKE_EXCEPTION_VECTOR(185)
	263	MAKE_EXCEPTION_VECTOR(186)
	264	MAKE_EXCEPTION_VECTOR(187)
	265	MAKE_EXCEPTION_VECTOR(188)
	266	MAKE_EXCEPTION_VECTOR(189)
	267
	268	MAKE_EXCEPTION_VECTOR(190)
	269	MAKE_EXCEPTION_VECTOR(191)
	270	MAKE_EXCEPTION_VECTOR(192)
	271	MAKE_EXCEPTION_VECTOR(193)
	272	MAKE_EXCEPTION_VECTOR(194)
	273	MAKE_EXCEPTION_VECTOR(195)
	274	MAKE_EXCEPTION_VECTOR(196)
	275	MAKE_EXCEPTION_VECTOR(197)
	276	MAKE_EXCEPTION_VECTOR(198)
	277	MAKE_EXCEPTION_VECTOR(199)
	278
	279	MAKE_EXCEPTION_VECTOR(200)
	280	MAKE_EXCEPTION_VECTOR(201)
	281	MAKE_EXCEPTION_VECTOR(202)
	282	MAKE_EXCEPTION_VECTOR(203)
	283	MAKE_EXCEPTION_VECTOR(204)
	284	MAKE_EXCEPTION_VECTOR(205)
	285	MAKE_EXCEPTION_VECTOR(206)
	286	MAKE_EXCEPTION_VECTOR(207)
	287	MAKE_EXCEPTION_VECTOR(208)
	288	MAKE_EXCEPTION_VECTOR(209)
	289
	290	MAKE_EXCEPTION_VECTOR(210)
	291	MAKE_EXCEPTION_VECTOR(211)
	292	MAKE_EXCEPTION_VECTOR(212)
	293	MAKE_EXCEPTION_VECTOR(213)
	294	MAKE_EXCEPTION_VECTOR(214)
	295	MAKE_EXCEPTION_VECTOR(215)
	296	MAKE_EXCEPTION_VECTOR(216)
	297	MAKE_EXCEPTION_VECTOR(217)
	298	MAKE_EXCEPTION_VECTOR(218)
	299	MAKE_EXCEPTION_VECTOR(219)
	300
	301	MAKE_EXCEPTION_VECTOR(220)
	302	MAKE_EXCEPTION_VECTOR(221)
	303	MAKE_EXCEPTION_VECTOR(222)
	304	MAKE_EXCEPTION_VECTOR(223)
	305	MAKE_EXCEPTION_VECTOR(224)
	306	MAKE_EXCEPTION_VECTOR(225)
	307	MAKE_EXCEPTION_VECTOR(226)
	308	MAKE_EXCEPTION_VECTOR(227)
	309	MAKE_EXCEPTION_VECTOR(228)
	310	MAKE_EXCEPTION_VECTOR(229)
	311
	312	MAKE_EXCEPTION_VECTOR(230)
	313	MAKE_EXCEPTION_VECTOR(231)
	314	MAKE_EXCEPTION_VECTOR(232)
	315	MAKE_EXCEPTION_VECTOR(233)
	316	MAKE_EXCEPTION_VECTOR(234)
	317	MAKE_EXCEPTION_VECTOR(235)
	318	MAKE_EXCEPTION_VECTOR(236)
	319	MAKE_EXCEPTION_VECTOR(237)
	320	MAKE_EXCEPTION_VECTOR(238)
	321	MAKE_EXCEPTION_VECTOR(239)
	322
	323	MAKE_EXCEPTION_VECTOR(240)
	324	MAKE_EXCEPTION_VECTOR(241)
	325	MAKE_EXCEPTION_VECTOR(242)
	326	MAKE_EXCEPTION_VECTOR(243)
	327	MAKE_EXCEPTION_VECTOR(244)
	328	MAKE_EXCEPTION_VECTOR(245)
	329	MAKE_EXCEPTION_VECTOR(246)
	330	MAKE_EXCEPTION_VECTOR(247)
	331	MAKE_EXCEPTION_VECTOR(248)
	332	MAKE_EXCEPTION_VECTOR(249)
	333
	334	MAKE_EXCEPTION_VECTOR(250)
	335	MAKE_EXCEPTION_VECTOR(251)
	336	MAKE_EXCEPTION_VECTOR(252)
	337	MAKE_EXCEPTION_VECTOR(253)
	338	MAKE_EXCEPTION_VECTOR(254)
	339	MAKE_EXCEPTION_VECTOR(255)
[1d2cfc0]	340	#endif
[b812f84]	341
	342	\|
	343	\| Start
	344	\|
	345	\| Entered from a hardware reset.
	346	\|
	347
	348	.global start \| Default entry point for GNU
	349	start:
	350
	351	\|
	352	\| Copy initialized data area from ROM to RAM
	353	\|
	354
	355	copy_data:
	356	moveal #_etext,%a0 \| find the end of .text
	357	moveal #_copy_start,%a1 \| find the beginning of .data
	358	moveal #_edata,%a2 \| find the end of .data
	359
	360	copy_data_loop:
	361
	362	movel %a0@+,%a1@+ \| copy the data
	363	cmpal %a2,%a1
	364	jlt copy_data_loop \| loop until edata reached
	365
	366	\|
	367	\| zero out uninitialized data area
	368	\|
	369
	370	zerobss:
	371	moveal #_clear_end,%a0 \| find end of .bss
	372	moveal #_clear_start,%a1 \| find beginning of .bss
	373	moveq #0,%d0
	374
	375	zerobss_loop:
	376
	377	movel %d0,%a1@+ \| to zero out uninitialized
	378	cmpal %a0,%a1
	379	jlt zerobss_loop \| loop until _end reached
	380
	381	movel #_stack_init,%d0 \| load stack top
	382
	383	movw #0x3700,%sr \| SUPV MODE,INTERRUPTS OFF!!!
	384	movel %d0,%a7 \| set master stack pointer
	385	movel %d0,%a6 \| set base pointer
	386
	387	pea env \| push environp
	388	pea arg \| push argv
	389	movel #0,%a7@- \| push argc
	390	jsr boot_card
	391	\| if this returns, what do we do???
	392
	393	.global bsp_exitted
	394	bsp_exitted:
	395	jmp bsp_exitted
	396
	397
	398	\|
	399	\| Initialised data
	400	\|
	401
	402	.sect .data
	403
	404	\|
	405	\| Uninitialised data
	406	\|
	407
	408	.sect .bss
	409
	410	env: .long 0
	411	arg: .long 0
	412
	413	.global environ
	414	.align 2
	415
	416	environ:
	417	.long env
	418

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