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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / b0f1c03607b7c1ea07090a1d97a308fba901051d / . / board / netstar / eeprom_start.S
blob: 130648585459f7905eb672b7a087d38ba320dbd3 [file] [log] [blame]
Wolfgang Denkac7eb8a2005-09-14 23:53:32 +0200[diff] [blame]1/*
2 * Copyright (c) 2005 2N Telekomunikace
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * version 2 as published by the Free Software Foundation.
7 *
8 */
9
10.globl _start
11_start: b eeprom
12
13#include "crcek.h"
14
15/**
16 * do_crc32 - calculate CRC32 of given buffer
17 * r0 - crc
18 * r1 - pointer to buffer
19 * r2 - buffer len
20 */
21 .macro do_crc32
22 ldr r5, FFFFFFFF
23 eor r0, r0, r5
24 adr r3, CRC32_TABLE
251:
26 ldrb r4, [r1], #1
27 eor r4, r4, r0
28 and r4, r4, #0xff
29 ldr r4, [r3, r4, lsl#2]
30 eor r0, r4, r0, lsr#8
31 subs r2, r2, #0x1
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200[diff] [blame]32 bne 1b
Wolfgang Denkac7eb8a2005-09-14 23:53:32 +0200[diff] [blame]33 eor r0, r0, r5
34 .endm
35
36 .macro crcuj, offset, size
37 ldr r1, \offset
38 ldr r2, [r1]
39 cmp r2, #0 @ no data, no problem
40 beq 2f
41 mov r7, #1
42 tst r2, #3 @ unaligned size
43 bne 2f
44 mov r7, #2
45 ldr r0, \size
46 cmp r2, r0 @ bogus size
47 bhi 2f
48 mov r7, #3
49 add r1, r1, #4
50 mov r0, #0
51 do_crc32
52 ldr r1, [r1]
532:
54 cmp r0, r1
55 .endm
56
57 .macro wait, reg
58 mov \reg, #0x1000
593:
60 subs \reg, \reg, #0x1
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200[diff] [blame]61 bne 3b
Wolfgang Denkac7eb8a2005-09-14 23:53:32 +0200[diff] [blame]62
63 .endm
64.text
65.globl crcek
66crcek:
67 mov r6, #0
68@ crcuj _LOADER1_OFFSET, _LOADER_SIZE
69@ bne crc1_bad
70@ orr r6, r6, #1
71crc1_bad:
72 crcuj _LOADER2_OFFSET, _LOADER_SIZE
73 bne crc2_bad
74 orr r6, r6, #2
75crc2_bad:
76@ mov r0, r6
77 mov pc, lr
78 ldr r3, _LOADER1_OFFSET
79 ldr r4, _LOADER2_OFFSET
80 tst r6, #3
81 beq one_is_bad @ one of them (or both) has bad crc
82 ldr r1, [r3, #4]
83 ldr r2, [r4, #4]
84 cmp r1, r2 @ boot 2nd loader if versions differ
85 beq boot_1st
86 b boot_2nd
87one_is_bad:
88 tst r6, #1
89 bne boot_1st
90 tst r6, #2
91 bne boot_2nd
92@ We are doomed, so let user know.
93 ldr r0, GPIO_BASE @ configure GPIO pins
94 ldr r1, GPIO_DIRECTION
95 strh r1, [r0, #0x08]
96blink_loop:
97 mov r1, #0x08
98 strh r1, [r0, #0x04]
99 wait r3
100 mov r1, #0x10
101 strh r1, [r0, #0x04]
102 wait r3
103 b blink_loop
104boot_1st:
105 add pc, r3, #8
106boot_2nd:
107 add pc, r4, #8
108
109_LOADER_SIZE:
110 .word LOADER_SIZE - 8 @ minus size and crc32
111_LOADER1_OFFSET:
112 .word LOADER1_OFFSET
113_LOADER2_OFFSET:
114 .word LOADER2_OFFSET
115
116FFFFFFFF:
117 .word 0xffffffff
118CRC32_TABLE:
119 .word 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419
120 .word 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4
121 .word 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07
122 .word 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de
123 .word 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856
124 .word 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9
125 .word 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4
126 .word 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b
127 .word 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3
128 .word 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a
129 .word 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599
130 .word 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924
131 .word 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190
132 .word 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f
133 .word 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e
134 .word 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01
135 .word 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed
136 .word 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950
137 .word 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3
138 .word 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2
139 .word 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a
140 .word 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5
141 .word 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010
142 .word 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f
143 .word 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17
144 .word 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6
145 .word 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615
146 .word 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8
147 .word 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344
148 .word 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb
149 .word 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a
150 .word 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5
151 .word 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1
152 .word 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c
153 .word 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef
154 .word 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236
155 .word 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe
156 .word 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31
157 .word 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c
158 .word 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713
159 .word 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b
160 .word 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242
161 .word 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1
162 .word 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c
163 .word 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278
164 .word 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7
165 .word 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66
166 .word 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9
167 .word 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605
168 .word 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8
169 .word 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b
170 .word 0x2d02ef8d
171
172GPIO_BASE:
173 .word 0xfffce000
174GPIO_DIRECTION:
175 .word 0x0000ffe7
176
177.end