# 
# start.txt - this file controls how u-boot starts when read
#             from media like CF, MMC, etc

setenv ${txt_file}
 
# first load the root_config.txt file
# this file defines the device and fstype of the root file system
# and specifies whether we will be programing the on-board flash
# or booting from some other media
txt_file=root_config.txt
run execute_txt_file

# load the tty_config.txt file (normally not needed)
# this file usually controls which serial port is the console
txt_file=tty_config.txt
run execute_txt_file

# load the hw_config.txt file
# this file can be used to set hw registers to specific values
# it is most often used to setup the framebuffer geometry
txt_file=hw_config.txt
run execute_txt_file && run hw_config

# load the install_config.txt file
# this file can be used to pass parameters to the Debian installer
# when doing a fresh install of Debian. Otherwise, it is not needed.
txt_file=install_config.txt
run execute_txt_file

# check for envars that should be set by default
# or from the files loaded above
test -n ${tty_args}  || echo "Warning missing tty_args."
test -n ${root_args} || echo "Warning missing root_args."
test -n ${mtd_args}  || echo "Warning missing mtd_args."

# combine all the kernel command line arguments into
# a single envar: bootargs
run setbootargs
echo "Using bootargs: " $bootargs

for flash in ${FLASH_ORDER}
do
  # copy images to on-board flash 
  if test -n ${images_to_flash}
  then
    echo ${images_to_flash}
    for image in ${images_to_flash}
    do
      load_file=${image}
      load_buffer=scratch_buffer
      ${flash}_partition=${image}
      if test ${image} = zImage || test ${image} = uImage
      then
	${flash}_partition=kernel
      fi
      run load_${flash}
    done
    saveenv
  fi
done

# copy images to dram in preparation to boot
if test -n ${images_to_dram}
then
  echo ${images_to_dram}
  for image in ${images_to_dram}
  do 
    load_file=${image}
    load_buffer=${image}_buffer
    if test ${image} = zImage || test ${image} = uImage
    then
      load_buffer=kernel_buffer
    fi
    if test ${image} = ramdisk.gz || test ${image} = initrd.gz
    then
      load_buffer=initrd
    fi
    run load_dram
  done
fi

# after this file is executed, the system will be booted