.equ SDRAM_BASE,   0x30000000

.equ MEM_CTL_BASE, 0x48000000

.text

.global _start

_start:

    bl disable_watch_dog

    bl memsetup

    bl copy_steppingstone_to_sdram

    ldr pc,=on_sdram

on_sdram:

    ldr sp,=0x34000000

    bl main

halt_loop:

    b halt_loop

disable_watch_dog:

    mov r1,#0x53000000

    mov r2,#0x00

    str r2,[r1]

    mov pc,lr

copy_steppingstone_to_sdram:

    mov r1,#0x00

    ldr r2,=SDRAM_BASE

    mov r3,#*

:

    ldr r4,[r1],#

    str r4,[r2],#

    cmp r1,r3

    bne 1b

    mov pc,lr

memsetup:

    mov r1,#MEM_CTL_BASE

    adrl r2,mem_cfg_val

    add r3,r1,#

:

    ldr r4,[r2],#

    ldr r4,[r1],#

    cmp r1,r3

    bne 1b

    mov pc,lr

.align

mem_cfg_val:

    .long 0x22011110 @BWSCON

    .long 0x00000700 @BANKCON0

    .long 0x00000700 @BANKCON1

    .long 0x00000700 @BANKCON2

    .long 0x00000700 @BANKCON3

    .long 0x00000700 @BANKCON4

    .long 0x00000700 @BANKCON5

    .long 0x00018005 @BANKCON6

    .long 0x00018005 @BANKCON7

    .long 0x008C07A3 @REFRESH

    .long 0x000000B1 @BANKSIZE

    .long 0x00000030 @MRSRB6

    .long 0x00000030 @MRSRB7

#define GPBCON   *((volatile unsigned long*)0x56000010)

#define GPBDAT   *((volatile unsigned long*)0x56000014)

int main()

{

    GPBCON=0x00000400;

    GPBDAT=0x00000000;

    return ;

}

all:head.o led.o

    arm-linux-ld -Ttext 0x30000000 led.o head.o -o sdram.elf

    arm-linux-objcopy -O binary -S sdram.elf sdram.bin

    arm-linux-objdump -D -m arm sdram.elf > sdram.dis

head.o:head.s

    arm-linux-gcc -g -c head.s

led.o:led.c

    arm-linux-gcc -g -c led.c

clean:

    rm -f sdram.dis sdram.bin sdram.elf *.o

dongry@d-linux:~$ cd arm-tools

dongry@d-linux:~/arm-tools$ ls

ARM-tools

dongry@d-linux:~/arm-tools$ cd ARM-tools

dongry@d-linux:~/arm-tools/ARM-tools$ ls

arm-linux-gcc-4.3.2.tgz  eclipse-cpp-helios-SR2-linux-gtk.tar.gz

arm-linux-gdb-7.5        JLink_Linux_V434a

dnw                      JLink_Linux_V434a.tgz

dnw_usb.ko

dongry@d-linux:~/arm-tools/ARM-tools$ cd JLink_Linux_V434a

dongry@d-linux:~/arm-tools/ARM-tools/JLink_Linux_V434a$ ls

45-jlink.rules  JLinkGDBServer    libjlinkarm.so.4.34.1  start

JLinkExe        libjlinkarm.so.  README

dongry@d-linux:~/arm-tools/ARM-tools/JLink_Linux_V434a$ ./JLinkGDBServer  //运行JLink

SEGGER J-Link GDB Server V4.34a

JLinkARM.dll V4.34a (DLL compiled Aug   ::)