http://www.koansoftware.com/it/art.php?art=80

Howto replace u-boot (1.1.4) on AT91RM9200 board

03.October.2005 Marco Cavallini - m.cavallini[at]koansoftware[dot]com [Letto 984 volte]

Howto load u-boot-1.1.4 placing it at the beginning of Parallel Flash.
Original pre-loader aka 'romboot' is no longer necessary.

Step A
* Using u-boot-1.1.4
* DO NOT USE romboot (boot.bin)

• Rebuild u-boot 1.1.4
  
  Step A (old)
  * Using u-boot-1.1.2
  * DO NOT USE romboot (boot.bin)
  
  
  
• Rebuild u-boot
  In u-boot-1.1.2 sources change u-boot-1.1.2/include/configs/at91rm9200dk.h
  replacing this line : #undef CONFIG_BOOTBINFUNC
  with this new one : #define CONFIG_BOOTBINFUNC 1
  
  
• Step B
  Boot the original u-boot and...
  
  
• Step C
  Load and replace u-boot.bin
  
  protect off 10000000 1001ffff
  erase 10000000 1001ffff
  loadb 20000000
  (send u.boot.bin with kermit)
  cp.b 20000000 10000000 1ffff
  protect on 10000000 1001ffff
  
  ------------------------------------------
  
  
• If you need to recover original romboot (only if necessary) please use u-boot-0.3.2 provided with AT board.
  If you have deleted u-boot already present on the board
  you have to load it again (using Hyperterminal)
  1. Remove R159
  2. Using xmodem protocol load loader.bin
  3. Using xmodem protocol load u-boot.bin
  (Now is time to insert R159 and reboot if you removed it at point 1.)
  
  In this case please refer to Atmel documentation.
  
  ------------------------------------------
  
  U-Boot 1.1.4 (Mar 29 2006 - 18:01:52)
  
  U-Boot code: 21F00000 -> 21F16540 BSS: -> 21F33404
  RAM Configuration:
  Bank #0: 20000000 64 MB
  Atmel: AT49BV6416 (64Mbit)
  Flash: 8 MB
  DataFlash:AT45DB642
  Nb pages: 8192
  Page Size: 1056
  Size= 8650752 bytes
  Logical address: 0xC0000000
  Area 0: C0000000 to C0007FFF (RO)
  Area 1: C0008000 to C001FFFF (RO)
  Area 2: C0020000 to C0027FFF
  Area 3: C0028000 to C083FFFF
  *** Warning - bad CRC, using default environment
  
  Ignore bad CRC error caused by the missing environment variables and to set them with:
  
  setenv baudrate 115200
  setenv bootdelay 3
  setenv ethaddr 12.34.56.78.90.aa
  setenv netmask 255.255.255.0
  setenv ipaddr 192.168.0.184
  setenv serverip 192.168.0.5
  setenv bootargs root=/dev/ram0 rw initrd=0x21100000,6000000 ramdisk_size=15360 console=ttyS0,115200 mem=32M
  setenv bootcmd 'tftp 21100000 ramdisk; tftp 21000000 uImage; bootm'
  
  ------------------------------------------
  
  Booting from serial Data Flash
  If you want to store u-boot in serial Data Flash refer to this Atmel document
  http://www.atmel.com/dyn/resources/prod_documents/doc6067.pdf