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gerrit-public.fairphone.software / kernel / msm / f6e6e883730aff2718610d3eba7608fcf73328ed / . / arch / m68knommu / platform / 68328 / head-pilot.S
blob: 46b3604f999caf61dbf17a91a4d478a4c24cc1de [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * linux/arch/m68knommu/platform/68328/head-rom.S
3 * - A startup file for the MC68328
4 *
5 * Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>,
6 * Kenneth Albanowski <kjahds@kjahds.com>,
7 * The Silver Hammer Group, Ltd.
8 *
9 * (c) 1995, Dionne & Associates
10 * (c) 1995, DKG Display Tech.
11 */
12
13#define ASSEMBLY
14
15#define IMMED #
16#define DBG_PUTC(x) moveb IMMED x, 0xfffff907
17
18#include <linux/config.h>
19
20.global _stext
21.global _start
22
23.global _rambase
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]24.global _ramvec
25.global _ramstart
26.global _ramend
27
28.global penguin_bits
29
30#ifdef CONFIG_PILOT
31
32#define IMR 0xFFFFF304
33
34 .data
35 .align 16
36
37penguin_bits:
38#include "bootlogo.rh"
39
40#endif
41
42/*****************************************************************************/
43
44.data
45
46/*
47 * Set up the usable of RAM stuff. Size of RAM is determined then
48 * an initial stack set up at the end.
49 */
50.align 4
51_ramvec:
52.long 0
53_rambase:
54.long 0
55_ramstart:
56.long 0
57_ramend:
58.long 0
59
60.text
61
62_start:
63_stext:
64
65
66#ifdef CONFIG_M68328
67
68#ifdef CONFIG_PILOT
69 .byte 0x4e, 0xfa, 0x00, 0x0a /* Jmp +X bytes */
70 .byte 'b', 'o', 'o', 't'
71 .word 10000
72
73 nop
74#endif
75
76 moveq #0, %d0
77 movew %d0, 0xfffff618 /* Watchdog off */
78 movel #0x00011f07, 0xfffff114 /* CS A1 Mask */
79
80 movew #0x0800, 0xfffff906 /* Ignore CTS */
81 movew #0x010b, 0xfffff902 /* BAUD to 9600 */
82
83 movew #0x2410, 0xfffff200 /* PLLCR */
84 movew #0x123, 0xfffff202 /* PLLFSR */
85
86#ifdef CONFIG_PILOT
87 moveb #0, 0xfffffA27 /* LCKCON */
88 movel #_start, 0xfffffA00 /* LSSA */
89 moveb #0xa, 0xfffffA05 /* LVPW */
90 movew #0x9f, 0xFFFFFa08 /* LXMAX */
91 movew #0x9f, 0xFFFFFa0a /* LYMAX */
92 moveb #9, 0xfffffa29 /* LBAR */
93 moveb #0, 0xfffffa25 /* LPXCD */
94 moveb #0x04, 0xFFFFFa20 /* LPICF */
95 moveb #0x58, 0xfffffA27 /* LCKCON */
96 moveb #0x85, 0xfffff429 /* PFDATA */
97 moveb #0xd8, 0xfffffA27 /* LCKCON */
98 moveb #0xc5, 0xfffff429 /* PFDATA */
99 moveb #0xd5, 0xfffff429 /* PFDATA */
100
101 moveal #0x00100000, %a3
102 moveal #0x100ffc00, %a4
103#endif /* CONFIG_PILOT */
104
105#endif /* CONFIG_M68328 */
106
107 movew #0x2700, %sr
108 lea %a4@(-4), %sp
109
110 DBG_PUTC('\r')
111 DBG_PUTC('\n')
112 DBG_PUTC('A')
113
114 moveq #0,%d0
115 movew #16384, %d0 /* PLL settle wait loop */
116L0:
117 subw #1, %d0
118 bne L0
119
120 DBG_PUTC('B')
121
122 /* Copy command line from beginning of RAM (+16) to end of bss */
Greg Ungerer2ae9cb62006-06-26 16:34:04 +1000[diff] [blame]123 movel #CONFIG_VECTORBASE, %d7
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]124 addl #16, %d7
125 moveal %d7, %a0
126 moveal #_ebss, %a1
127 lea %a1@(512), %a2
128
129 DBG_PUTC('C')
130
131 /* Copy %a0 to %a1 until %a1 == %a2 */
132L2:
133 movel %a0@+, %d0
134 movel %d0, %a1@+
135 cmpal %a1, %a2
136 bhi L2
137
138 /* Copy data+init segment from ROM to RAM */
139 moveal #_etext, %a0
140 moveal #_sdata, %a1
141 moveal #__init_end, %a2
142
143 DBG_PUTC('D')
144
145 /* Copy %a0 to %a1 until %a1 == %a2 */
146LD1:
147 movel %a0@+, %d0
148 movel %d0, %a1@+
149 cmpal %a1, %a2
150 bhi LD1
151
152 DBG_PUTC('E')
153
154 moveal #_sbss, %a0
155 moveal #_ebss, %a1
156
157 /* Copy 0 to %a0 until %a0 == %a1 */
158L1:
159 movel #0, %a0@+
160 cmpal %a0, %a1
161 bhi L1
162
163 DBG_PUTC('F')
164
165 /* Copy command line from end of bss to command line */
166 moveal #_ebss, %a0
167 moveal #command_line, %a1
168 lea %a1@(512), %a2
169
170 DBG_PUTC('G')
171
172 /* Copy %a0 to %a1 until %a1 == %a2 */
173L3:
174 movel %a0@+, %d0
175 movel %d0, %a1@+
176 cmpal %a1, %a2
177 bhi L3
178
179 movel #_sdata, %d0
180 movel %d0, _rambase
181 movel #_ebss, %d0
182 movel %d0, _ramstart
183
184 movel %a4, %d0
185 subl #4096, %d0 /* Reserve 4K of stack */
186 moveq #79, %d7
187 movel %d0, _ramend
188
189 movel %a3, %d0
190 movel %d0, rom_length
191
192 pea 0
193 pea env
194 pea %sp@(4)
195 pea 0
196
197 DBG_PUTC('H')
198
199#ifdef CONFIG_PILOT
200 movel #penguin_bits, 0xFFFFFA00
201 moveb #10, 0xFFFFFA05
202 movew #160, 0xFFFFFA08
203 movew #160, 0xFFFFFA0A
204#endif /* CONFIG_PILOT */
205
206 DBG_PUTC('I')
207
208 lea init_thread_union, %a0
209 lea 0x2000(%a0), %sp
210
211 DBG_PUTC('J')
212 DBG_PUTC('\r')
213 DBG_PUTC('\n')
214
215 jsr start_kernel
216_exit:
217
218 jmp _exit
219
220
221 .data
222env:
223 .long 0