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LeafOS / LeafOS-Devices / android_kernel_realme_mt6785 / ebafeeff0fea029099e9952f233e0794106897a6 / . / arch / m68knommu / platform / 68328 / head-pilot.S
blob: aecff532b3432cfa731e69cc525522f42e147bfc [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
Uwe Zeisbergerf30c2262006-10-03 23:01:26 +0200[diff] [blame]2 * linux/arch/m68knommu/platform/68328/head-pilot.S
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]18
19.global _stext
20.global _start
21
22.global _rambase
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]23.global _ramvec
24.global _ramstart
25.global _ramend
26
27.global penguin_bits
28
29#ifdef CONFIG_PILOT
30
31#define IMR 0xFFFFF304
32
33 .data
34 .align 16
35
36penguin_bits:
37#include "bootlogo.rh"
38
39#endif
40
41/*****************************************************************************/
42
43.data
44
45/*
46 * Set up the usable of RAM stuff. Size of RAM is determined then
47 * an initial stack set up at the end.
48 */
49.align 4
50_ramvec:
51.long 0
52_rambase:
53.long 0
54_ramstart:
55.long 0
56_ramend:
57.long 0
58
59.text
60
61_start:
62_stext:
63
64
65#ifdef CONFIG_M68328
66
67#ifdef CONFIG_PILOT
68 .byte 0x4e, 0xfa, 0x00, 0x0a /* Jmp +X bytes */
69 .byte 'b', 'o', 'o', 't'
70 .word 10000
71
72 nop
73#endif
74
75 moveq #0, %d0
76 movew %d0, 0xfffff618 /* Watchdog off */
77 movel #0x00011f07, 0xfffff114 /* CS A1 Mask */
78
79 movew #0x0800, 0xfffff906 /* Ignore CTS */
80 movew #0x010b, 0xfffff902 /* BAUD to 9600 */
81
82 movew #0x2410, 0xfffff200 /* PLLCR */
83 movew #0x123, 0xfffff202 /* PLLFSR */
84
85#ifdef CONFIG_PILOT
86 moveb #0, 0xfffffA27 /* LCKCON */
87 movel #_start, 0xfffffA00 /* LSSA */
88 moveb #0xa, 0xfffffA05 /* LVPW */
89 movew #0x9f, 0xFFFFFa08 /* LXMAX */
90 movew #0x9f, 0xFFFFFa0a /* LYMAX */
91 moveb #9, 0xfffffa29 /* LBAR */
92 moveb #0, 0xfffffa25 /* LPXCD */
93 moveb #0x04, 0xFFFFFa20 /* LPICF */
94 moveb #0x58, 0xfffffA27 /* LCKCON */
95 moveb #0x85, 0xfffff429 /* PFDATA */
96 moveb #0xd8, 0xfffffA27 /* LCKCON */
97 moveb #0xc5, 0xfffff429 /* PFDATA */
98 moveb #0xd5, 0xfffff429 /* PFDATA */
99
100 moveal #0x00100000, %a3
101 moveal #0x100ffc00, %a4
102#endif /* CONFIG_PILOT */
103
104#endif /* CONFIG_M68328 */
105
106 movew #0x2700, %sr
107 lea %a4@(-4), %sp
108
109 DBG_PUTC('\r')
110 DBG_PUTC('\n')
111 DBG_PUTC('A')
112
113 moveq #0,%d0
114 movew #16384, %d0 /* PLL settle wait loop */
115L0:
116 subw #1, %d0
117 bne L0
118
119 DBG_PUTC('B')
120
121 /* Copy command line from beginning of RAM (+16) to end of bss */
Greg Ungerer2ae9cb62006-06-26 16:34:04 +1000[diff] [blame]122 movel #CONFIG_VECTORBASE, %d7
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]123 addl #16, %d7
124 moveal %d7, %a0
125 moveal #_ebss, %a1
126 lea %a1@(512), %a2
127
128 DBG_PUTC('C')
129
130 /* Copy %a0 to %a1 until %a1 == %a2 */
131L2:
132 movel %a0@+, %d0
133 movel %d0, %a1@+
134 cmpal %a1, %a2
135 bhi L2
136
137 /* Copy data+init segment from ROM to RAM */
138 moveal #_etext, %a0
139 moveal #_sdata, %a1
140 moveal #__init_end, %a2
141
142 DBG_PUTC('D')
143
144 /* Copy %a0 to %a1 until %a1 == %a2 */
145LD1:
146 movel %a0@+, %d0
147 movel %d0, %a1@+
148 cmpal %a1, %a2
149 bhi LD1
150
151 DBG_PUTC('E')
152
153 moveal #_sbss, %a0
154 moveal #_ebss, %a1
155
156 /* Copy 0 to %a0 until %a0 == %a1 */
157L1:
158 movel #0, %a0@+
159 cmpal %a0, %a1
160 bhi L1
161
162 DBG_PUTC('F')
163
164 /* Copy command line from end of bss to command line */
165 moveal #_ebss, %a0
166 moveal #command_line, %a1
167 lea %a1@(512), %a2
168
169 DBG_PUTC('G')
170
171 /* Copy %a0 to %a1 until %a1 == %a2 */
172L3:
173 movel %a0@+, %d0
174 movel %d0, %a1@+
175 cmpal %a1, %a2
176 bhi L3
177
178 movel #_sdata, %d0
179 movel %d0, _rambase
180 movel #_ebss, %d0
181 movel %d0, _ramstart
182
183 movel %a4, %d0
184 subl #4096, %d0 /* Reserve 4K of stack */
185 moveq #79, %d7
186 movel %d0, _ramend
187
188 movel %a3, %d0
189 movel %d0, rom_length
190
191 pea 0
192 pea env
193 pea %sp@(4)
194 pea 0
195
196 DBG_PUTC('H')
197
198#ifdef CONFIG_PILOT
199 movel #penguin_bits, 0xFFFFFA00
200 moveb #10, 0xFFFFFA05
201 movew #160, 0xFFFFFA08
202 movew #160, 0xFFFFFA0A
203#endif /* CONFIG_PILOT */
204
205 DBG_PUTC('I')
206
207 lea init_thread_union, %a0
208 lea 0x2000(%a0), %sp
209
210 DBG_PUTC('J')
211 DBG_PUTC('\r')
212 DBG_PUTC('\n')
213
214 jsr start_kernel
215_exit:
216
217 jmp _exit
218
219
220 .data
221env:
222 .long 0