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ac7eb8a3 WD |
1 | /** |
2 | * (C) Copyright 2005 | |
3 | * 2N Telekomunikace, Ladislav Michl <michl@2n.cz> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * version 2. | |
8 | * | |
9 | * Image layout looks like following: | |
10 | * u32 - size | |
11 | * u32 - version | |
12 | * ... - data | |
13 | * u32 - crc32 | |
14 | */ | |
15 | ||
87a5c73d | 16 | #include <config.h> |
ac7eb8a3 WD |
17 | #include "crcek.h" |
18 | ||
19 | /** | |
20 | * do_crc32 - calculate CRC32 of given buffer | |
21 | * r0 - crc | |
22 | * r1 - pointer to buffer | |
23 | * r2 - buffer len | |
24 | */ | |
25 | .macro do_crc32 | |
26 | ldr r5, FFFFFFFF | |
27 | eor r0, r0, r5 | |
28 | adr r3, CRC32_TABLE | |
29 | 1: | |
30 | ldrb r4, [r1], #1 | |
31 | eor r4, r4, r0 | |
32 | and r4, r4, #0xff | |
33 | ldr r4, [r3, r4, lsl#2] | |
34 | eor r0, r4, r0, lsr#8 | |
35 | subs r2, r2, #0x1 | |
53677ef1 | 36 | bne 1b |
ac7eb8a3 WD |
37 | eor r0, r0, r5 |
38 | .endm | |
39 | ||
40 | .macro crcuj, offset, size | |
41 | mov r0, #0 | |
42 | ldr r1, \offset | |
87a5c73d | 43 | ldr r2, [r1], #4 |
ac7eb8a3 WD |
44 | cmp r2, r0 @ no data, no problem |
45 | beq 2f | |
46 | tst r2, #3 @ unaligned size | |
47 | bne 2f | |
48 | ldr r3, \size | |
49 | cmp r2, r3 @ bogus size | |
50 | bhi 2f | |
ac7eb8a3 WD |
51 | do_crc32 |
52 | ldr r1, [r1] | |
53 | 2: | |
54 | cmp r0, r1 | |
55 | .endm | |
56 | ||
57 | .macro wait, reg | |
87a5c73d | 58 | mov \reg, #0x100000 |
ac7eb8a3 WD |
59 | 3: |
60 | subs \reg, \reg, #0x1 | |
53677ef1 | 61 | bne 3b |
ac7eb8a3 | 62 | .endm |
87a5c73d | 63 | |
ac7eb8a3 WD |
64 | .text |
65 | .globl crcek | |
66 | crcek: | |
87a5c73d WD |
67 | /* Enable I-cache */ |
68 | mrc p15, 0, r1, c0, c0, 0 @ read C15 ID register | |
69 | mrc p15, 0, r1, c0, c0, 1 @ read C15 Cache information register | |
70 | mrc p15, 0, r1, c1, c0, 0 @ read C15 Control register | |
71 | orr r1, r1, #0x1000 @ enable I-cache, map interrupt vector 0xffff0000 | |
72 | mcr p15, 0, r1, c1, c0, 0 @ write C15 Control register | |
73 | mov r1, #0x00 | |
74 | mcr p15, 0, r1, c7, c5, 0 @ Flush I-cache | |
75 | nop | |
76 | nop | |
77 | nop | |
78 | nop | |
79 | ||
80 | /* Setup clocking mode */ | |
81 | ldr r0, MPU_CLKM_BASE @ base of CLOCK unit | |
82 | ldrh r1, [r0, #0x18] @ ARM_SYST - get reset status | |
83 | bic r1, r1, #(7 << 11) @ clear clock select | |
84 | orr r1, r1, #(2 << 11) @ set synchronous scalable | |
85 | mov r2, #0 | |
86 | loop: | |
87 | cmp r2, #1 @ this loop will wait for at least 100 cycles | |
88 | streqh r1, [r0, #0x18] @ before issuing next request from MPU | |
89 | add r2, r2, #1 @ on the 1st run code is loaded into I-cache | |
90 | cmp r2, #16 @ and second run will set clocking mode | |
91 | bne loop | |
92 | nop | |
93 | ||
94 | /* Setup clock dividers */ | |
95 | ldr r1, CKCTL_VAL | |
96 | orr r1, r1, #0x2000 @ enable DSP clock | |
97 | strh r1, [r0] @ setup clock divisors | |
98 | ||
99 | /* Setup DPLL to generate requested freq */ | |
100 | ldr r0, DPLL1_BASE @ base of DPLL1 register | |
101 | mov r1, #0x0010 @ set PLL_ENABLE | |
102 | orr r1, r1, #0x2000 @ set IOB to new locking | |
103 | orr r1, r1, #(OMAP5910_DPLL_MUL << 7) @ setup multiplier CLKREF | |
104 | orr r1, r1, #(OMAP5910_DPLL_DIV << 5) @ setup divider CLKREF | |
105 | strh r1, [r0] @ write | |
106 | ||
107 | locking: | |
108 | ldrh r1, [r0] @ get DPLL value | |
109 | tst r1, #0x01 | |
110 | beq locking @ while LOCK not set | |
111 | ||
112 | /* Enable clock */ | |
113 | ldr r0, MPU_CLKM_BASE @ base of CLOCK unit | |
114 | mov r1, #(1 << 10) @ disable idle mode do not check | |
115 | @ nWAKEUP pin, other remain active | |
b9365a26 | 116 | strh r1, [r0, #0x04] |
87a5c73d WD |
117 | ldr r1, EN_CLK_VAL |
118 | strh r1, [r0, #0x08] | |
119 | mov r1, #0x003f @ FLASH.RP not enabled in idle and | |
120 | strh r1, [r0, #0x0c] @ max delayed ( 32 x CLKIN ) | |
121 | ||
122 | ||
ac7eb8a3 WD |
123 | mov r6, #0 |
124 | crcuj _LOADER1_OFFSET, _LOADER_SIZE | |
125 | bne crc1_bad | |
126 | orr r6, r6, #1 | |
127 | crc1_bad: | |
128 | crcuj _LOADER2_OFFSET, _LOADER_SIZE | |
129 | bne crc2_bad | |
130 | orr r6, r6, #2 | |
131 | crc2_bad: | |
132 | ldr r3, _LOADER1_OFFSET | |
133 | ldr r4, _LOADER2_OFFSET | |
87a5c73d WD |
134 | teq r6, #3 |
135 | bne one_is_bad @ one of them (or both) has bad crc | |
ac7eb8a3 WD |
136 | ldr r1, [r3, #4] |
137 | ldr r2, [r4, #4] | |
138 | cmp r1, r2 @ boot 2nd loader if versions differ | |
139 | beq boot_1st | |
140 | b boot_2nd | |
141 | one_is_bad: | |
142 | tst r6, #1 | |
143 | bne boot_1st | |
144 | tst r6, #2 | |
145 | bne boot_2nd | |
146 | @ We are doomed, so let user know. | |
87a5c73d | 147 | hell: |
ac7eb8a3 WD |
148 | ldr r0, GPIO_BASE @ configure GPIO pins |
149 | ldr r1, GPIO_DIRECTION | |
150 | strh r1, [r0, #0x08] | |
151 | blink_loop: | |
152 | mov r1, #0x08 | |
153 | strh r1, [r0, #0x04] | |
154 | wait r3 | |
155 | mov r1, #0x10 | |
156 | strh r1, [r0, #0x04] | |
157 | wait r3 | |
158 | b blink_loop | |
159 | boot_1st: | |
160 | add pc, r3, #8 | |
161 | boot_2nd: | |
162 | add pc, r4, #8 | |
163 | ||
164 | _LOADER_SIZE: | |
165 | .word LOADER_SIZE - 8 @ minus size and crc32 | |
166 | _LOADER1_OFFSET: | |
167 | .word LOADER1_OFFSET | |
168 | _LOADER2_OFFSET: | |
169 | .word LOADER2_OFFSET | |
170 | ||
171 | FFFFFFFF: | |
172 | .word 0xffffffff | |
173 | CRC32_TABLE: | |
174 | .word 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419 | |
175 | .word 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4 | |
176 | .word 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07 | |
177 | .word 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de | |
178 | .word 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856 | |
179 | .word 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9 | |
180 | .word 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4 | |
181 | .word 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b | |
182 | .word 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3 | |
183 | .word 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a | |
184 | .word 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599 | |
185 | .word 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924 | |
186 | .word 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190 | |
187 | .word 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f | |
188 | .word 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e | |
189 | .word 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01 | |
190 | .word 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed | |
191 | .word 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950 | |
192 | .word 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3 | |
193 | .word 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2 | |
194 | .word 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a | |
195 | .word 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5 | |
196 | .word 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010 | |
197 | .word 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f | |
198 | .word 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17 | |
199 | .word 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6 | |
200 | .word 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615 | |
201 | .word 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8 | |
202 | .word 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344 | |
203 | .word 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb | |
204 | .word 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a | |
205 | .word 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5 | |
206 | .word 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1 | |
207 | .word 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c | |
208 | .word 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef | |
209 | .word 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236 | |
210 | .word 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe | |
211 | .word 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31 | |
212 | .word 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c | |
213 | .word 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713 | |
214 | .word 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b | |
215 | .word 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242 | |
216 | .word 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1 | |
217 | .word 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c | |
218 | .word 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278 | |
219 | .word 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7 | |
220 | .word 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66 | |
221 | .word 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9 | |
222 | .word 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605 | |
223 | .word 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8 | |
224 | .word 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b | |
225 | .word 0x2d02ef8d | |
226 | ||
227 | GPIO_BASE: | |
228 | .word 0xfffce000 | |
87a5c73d WD |
229 | MPU_CLKM_BASE: |
230 | .word 0xfffece00 | |
231 | DPLL1_BASE: | |
232 | .word 0xfffecf00 | |
233 | ||
234 | CKCTL_VAL: | |
235 | .word OMAP5910_ARM_CKCTL | |
236 | EN_CLK_VAL: | |
237 | .word OMAP5910_ARM_EN_CLK | |
ac7eb8a3 WD |
238 | GPIO_DIRECTION: |
239 | .word 0x0000ffe7 | |
240 | ||
241 | .end |