7-2
|
7-4
|
Linker Command Script-Reset Vector Placement .../board/omap3/beagle/u-boot.lds
|
OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(_start)
SECTIONS
{
. = 0x00000000;
. = ALIGN(4);
.text :
{
cpu/arm_cortexa8/start.o (.text)
*(.text)
}
}
|
7-3
|
7-5
|
Reset Vectors …/cpu/arm_cortexa8/start.S
|
.globl _start
_start:
b reset
ldr pc, _undefined_instruction
ldr pc, _software_interrupt
ldr pc, _prefetch_abort
ldr pc, _data_abort
ldr pc, _not_used
ldr pc, _irq
ldr pc, _fiq
_undefined_instruction: .word undefined_instruction
_software_interrupt: .word software_interrupt
…
_pad: .word 0x12345678 /* now 16*4=64 */
.global _end_vect
_end_vect:
|
7-4
|
7-9
|
Portions of U-Boot Board-Configuration Header File …/incluyde/configs/omap3_beagle.h
|
/*
* High Level Configuration Options
*/
#define CONFIG_ARMCORTEXA8 1 /* This is an ARM V7 CPU core */
#define CONFIG_OMAP 1 /* in a TI OMAP core */
#define CONFIG_OMAP34XX 1 /* which is a 34XX */
#define CONFIG_OMAP3430 1 /* which is in a 3430 */
#define CONFIG_OMAP3_BEAGLE 1 /* working with BEAGLE */
#include <asm/arch/cpu.h> /* get chip and board defs */
#include <asm/arch/omap3.h>
/*
* Display CPU and Board information
*/
#define CONFIG_DISPLAY_CPUINFO 1
#define CONFIG_DISPLAY_BOARDINFO 1
|