242 lines
7.2 KiB
ArmAsm
242 lines
7.2 KiB
ArmAsm
/**
|
|
* (C) Copyright 2005
|
|
* 2N Telekomunikace, Ladislav Michl <michl@2n.cz>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2.
|
|
*
|
|
* Image layout looks like following:
|
|
* u32 - size
|
|
* u32 - version
|
|
* ... - data
|
|
* u32 - crc32
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include "crcek.h"
|
|
|
|
/**
|
|
* do_crc32 - calculate CRC32 of given buffer
|
|
* r0 - crc
|
|
* r1 - pointer to buffer
|
|
* r2 - buffer len
|
|
*/
|
|
.macro do_crc32
|
|
ldr r5, FFFFFFFF
|
|
eor r0, r0, r5
|
|
adr r3, CRC32_TABLE
|
|
1:
|
|
ldrb r4, [r1], #1
|
|
eor r4, r4, r0
|
|
and r4, r4, #0xff
|
|
ldr r4, [r3, r4, lsl#2]
|
|
eor r0, r4, r0, lsr#8
|
|
subs r2, r2, #0x1
|
|
bne 1b
|
|
eor r0, r0, r5
|
|
.endm
|
|
|
|
.macro crcuj, offset, size
|
|
mov r0, #0
|
|
ldr r1, \offset
|
|
ldr r2, [r1], #4
|
|
cmp r2, r0 @ no data, no problem
|
|
beq 2f
|
|
tst r2, #3 @ unaligned size
|
|
bne 2f
|
|
ldr r3, \size
|
|
cmp r2, r3 @ bogus size
|
|
bhi 2f
|
|
do_crc32
|
|
ldr r1, [r1]
|
|
2:
|
|
cmp r0, r1
|
|
.endm
|
|
|
|
.macro wait, reg
|
|
mov \reg, #0x100000
|
|
3:
|
|
subs \reg, \reg, #0x1
|
|
bne 3b
|
|
.endm
|
|
|
|
.text
|
|
.globl crcek
|
|
crcek:
|
|
/* Enable I-cache */
|
|
mrc p15, 0, r1, c0, c0, 0 @ read C15 ID register
|
|
mrc p15, 0, r1, c0, c0, 1 @ read C15 Cache information register
|
|
mrc p15, 0, r1, c1, c0, 0 @ read C15 Control register
|
|
orr r1, r1, #0x1000 @ enable I-cache, map interrupt vector 0xffff0000
|
|
mcr p15, 0, r1, c1, c0, 0 @ write C15 Control register
|
|
mov r1, #0x00
|
|
mcr p15, 0, r1, c7, c5, 0 @ Flush I-cache
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
/* Setup clocking mode */
|
|
ldr r0, MPU_CLKM_BASE @ base of CLOCK unit
|
|
ldrh r1, [r0, #0x18] @ ARM_SYST - get reset status
|
|
bic r1, r1, #(7 << 11) @ clear clock select
|
|
orr r1, r1, #(2 << 11) @ set synchronous scalable
|
|
mov r2, #0
|
|
loop:
|
|
cmp r2, #1 @ this loop will wait for at least 100 cycles
|
|
streqh r1, [r0, #0x18] @ before issuing next request from MPU
|
|
add r2, r2, #1 @ on the 1st run code is loaded into I-cache
|
|
cmp r2, #16 @ and second run will set clocking mode
|
|
bne loop
|
|
nop
|
|
|
|
/* Setup clock dividers */
|
|
ldr r1, CKCTL_VAL
|
|
orr r1, r1, #0x2000 @ enable DSP clock
|
|
strh r1, [r0] @ setup clock divisors
|
|
|
|
/* Setup DPLL to generate requested freq */
|
|
ldr r0, DPLL1_BASE @ base of DPLL1 register
|
|
mov r1, #0x0010 @ set PLL_ENABLE
|
|
orr r1, r1, #0x2000 @ set IOB to new locking
|
|
orr r1, r1, #(OMAP5910_DPLL_MUL << 7) @ setup multiplier CLKREF
|
|
orr r1, r1, #(OMAP5910_DPLL_DIV << 5) @ setup divider CLKREF
|
|
strh r1, [r0] @ write
|
|
|
|
locking:
|
|
ldrh r1, [r0] @ get DPLL value
|
|
tst r1, #0x01
|
|
beq locking @ while LOCK not set
|
|
|
|
/* Enable clock */
|
|
ldr r0, MPU_CLKM_BASE @ base of CLOCK unit
|
|
mov r1, #(1 << 10) @ disable idle mode do not check
|
|
@ nWAKEUP pin, other remain active
|
|
strh r1, [r0, #0x04]
|
|
ldr r1, EN_CLK_VAL
|
|
strh r1, [r0, #0x08]
|
|
mov r1, #0x003f @ FLASH.RP not enabled in idle and
|
|
strh r1, [r0, #0x0c] @ max delayed ( 32 x CLKIN )
|
|
|
|
|
|
mov r6, #0
|
|
crcuj _LOADER1_OFFSET, _LOADER_SIZE
|
|
bne crc1_bad
|
|
orr r6, r6, #1
|
|
crc1_bad:
|
|
crcuj _LOADER2_OFFSET, _LOADER_SIZE
|
|
bne crc2_bad
|
|
orr r6, r6, #2
|
|
crc2_bad:
|
|
ldr r3, _LOADER1_OFFSET
|
|
ldr r4, _LOADER2_OFFSET
|
|
teq r6, #3
|
|
bne one_is_bad @ one of them (or both) has bad crc
|
|
ldr r1, [r3, #4]
|
|
ldr r2, [r4, #4]
|
|
cmp r1, r2 @ boot 2nd loader if versions differ
|
|
beq boot_1st
|
|
b boot_2nd
|
|
one_is_bad:
|
|
tst r6, #1
|
|
bne boot_1st
|
|
tst r6, #2
|
|
bne boot_2nd
|
|
@ We are doomed, so let user know.
|
|
hell:
|
|
ldr r0, GPIO_BASE @ configure GPIO pins
|
|
ldr r1, GPIO_DIRECTION
|
|
strh r1, [r0, #0x08]
|
|
blink_loop:
|
|
mov r1, #0x08
|
|
strh r1, [r0, #0x04]
|
|
wait r3
|
|
mov r1, #0x10
|
|
strh r1, [r0, #0x04]
|
|
wait r3
|
|
b blink_loop
|
|
boot_1st:
|
|
add pc, r3, #8
|
|
boot_2nd:
|
|
add pc, r4, #8
|
|
|
|
_LOADER_SIZE:
|
|
.word LOADER_SIZE - 8 @ minus size and crc32
|
|
_LOADER1_OFFSET:
|
|
.word LOADER1_OFFSET
|
|
_LOADER2_OFFSET:
|
|
.word LOADER2_OFFSET
|
|
|
|
FFFFFFFF:
|
|
.word 0xffffffff
|
|
CRC32_TABLE:
|
|
.word 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419
|
|
.word 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4
|
|
.word 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07
|
|
.word 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de
|
|
.word 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856
|
|
.word 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9
|
|
.word 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4
|
|
.word 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b
|
|
.word 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3
|
|
.word 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a
|
|
.word 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599
|
|
.word 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924
|
|
.word 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190
|
|
.word 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f
|
|
.word 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e
|
|
.word 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01
|
|
.word 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed
|
|
.word 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950
|
|
.word 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3
|
|
.word 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2
|
|
.word 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a
|
|
.word 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5
|
|
.word 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010
|
|
.word 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f
|
|
.word 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17
|
|
.word 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6
|
|
.word 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615
|
|
.word 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8
|
|
.word 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344
|
|
.word 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb
|
|
.word 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a
|
|
.word 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5
|
|
.word 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1
|
|
.word 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c
|
|
.word 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef
|
|
.word 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236
|
|
.word 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe
|
|
.word 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31
|
|
.word 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c
|
|
.word 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713
|
|
.word 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b
|
|
.word 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242
|
|
.word 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1
|
|
.word 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c
|
|
.word 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278
|
|
.word 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7
|
|
.word 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66
|
|
.word 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9
|
|
.word 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605
|
|
.word 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8
|
|
.word 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b
|
|
.word 0x2d02ef8d
|
|
|
|
GPIO_BASE:
|
|
.word 0xfffce000
|
|
MPU_CLKM_BASE:
|
|
.word 0xfffece00
|
|
DPLL1_BASE:
|
|
.word 0xfffecf00
|
|
|
|
CKCTL_VAL:
|
|
.word OMAP5910_ARM_CKCTL
|
|
EN_CLK_VAL:
|
|
.word OMAP5910_ARM_EN_CLK
|
|
GPIO_DIRECTION:
|
|
.word 0x0000ffe7
|
|
|
|
.end
|