57 lines
1.7 KiB
ArmAsm
57 lines
1.7 KiB
ArmAsm
|
/*
|
||
|
|
* Copyright (c) 2008 Travis Geiselbrecht
|
||
|
|
*
|
||
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
||
|
|
* a copy of this software and associated documentation files
|
||
|
|
* (the "Software"), to deal in the Software without restriction,
|
||
|
|
* including without limitation the rights to use, copy, modify, merge,
|
||
|
|
* publish, distribute, sublicense, and/or sell copies of the Software,
|
||
|
|
* and to permit persons to whom the Software is furnished to do so,
|
||
|
|
* subject to the following conditions:
|
||
|
|
*
|
||
|
|
* The above copyright notice and this permission notice shall be
|
||
|
|
* included in all copies or substantial portions of the Software.
|
||
|
|
*
|
||
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
||
|
|
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
||
|
|
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
||
|
|
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
||
|
|
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
.globl platform_early_init
|
||
|
|
platform_early_init:
|
||
|
|
stmdb sp!, {lr}
|
||
|
|
|
||
|
|
/* enable the NRST reset pin */
|
||
|
|
ldr r1, =0xfffffd08
|
||
|
|
ldr r0, =0xa5000401
|
||
|
|
str r0, [r1]
|
||
|
|
|
||
|
|
/* disable watchdog */
|
||
|
|
ldr r1, =0xfffffd44
|
||
|
|
ldr r0, =0x3fff8fff
|
||
|
|
str r0, [r1]
|
||
|
|
|
||
|
|
bl init_clock
|
||
|
|
bl init_48mhz_clock
|
||
|
|
|
||
|
|
/* copy the .data section from ROM to RAM */
|
||
|
|
ldr r0, =__rodata_end
|
||
|
|
ldr r1, =__data_start
|
||
|
|
ldr r2, =__bss_start
|
||
|
|
__data_loop:
|
||
|
|
cmp r1, r2
|
||
|
|
ldrlt r3, [r0], #4
|
||
|
|
strlt r3, [r1], #4
|
||
|
|
blt __data_loop
|
||
|
|
|
||
|
|
bl mux_init
|
||
|
|
bl ser_init
|
||
|
|
bl platform_init_interrupts
|
||
|
|
|
||
|
|
ldmia sp!, {lr}
|
||
|
|
bx lr
|