[U-Boot-Users] problem on magicarm board based on lpc2290 cpu

[shi zhi]

I port u-boot to magicarm board based on lpc2290, this board has a nor 
flash whose address range form 0x80000000 to 0x801fffff 
ram address(0x81000000-0x817fffff). I modified the micro TEXT_BASE to 
0x81080000 and dowmload the u-boot.bin into the flash. the u-boot doesn't 
work at all . when i modified the micao TEXT_BASE to 0x80000000 and 
download to flash ,it only work for  a while and soon collapsed .  who can 
tell me what the problem is.
    this is  the ld sccript 
      
OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(_start)
SECTIONS
{
 . = 0x80000000;
 
 . = ALIGN(4);
 .text      :
 {
   cpu/lpc2200/start.o (.text)
   *(.text)
 }
 
 . = ALIGN(4);
 .rodata : { *(.rodata) }
 
 . = ALIGN(4);
 .data : { *(.data) }
 
 . = ALIGN(4);
 .got : { *(.got) }
 
  . = .;
  __u_boot_cmd_start = .;
  .u_boot_cmd : { *(.u_boot_cmd) }
  __u_boot_cmd_end = .;
 
 armboot_end_data = .;
 
 . = ALIGN(4);
 __bss_start = .;
 .bss : { *(.bss) }
 _end = .;
}

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