#!/bin/sh


get_env() {
  bootargs=$(fw_printenv -n bootargs)
  mem=$(echo ${bootargs} | awk -F '=' '$1=="mem"{print $2}' RS=' ')
  console=$(echo ${bootargs} | awk -F '=' '$1=="console"{print $2}' RS=' ')
  panic=$(echo ${bootargs} | awk -F '=' '$1=="panic"{print $2}' RS=' ')
  rootfstype=$(echo ${bootargs} | awk -F '=' '$1=="rootfstype"{print $2}' RS=' ')
  root=$(echo ${bootargs} | awk -F '=' '$1=="root"{print $2}' RS=' ')
  init=$(echo ${bootargs} | awk -F '=' '$1=="init"{print $2}' RS=' ')
  mtdparts=$(echo ${bootargs} | awk -F '=' '$1=="mtdparts"{print $2}' RS=' ')
  osmem=$(fw_printenv -n osmem)
  totalmem=$(fw_printenv -n totalmem)
  extras=$(fw_printenv -n extras)
}

calc_mmz() {
  mem_start=0x40000000
  mem_total=$(fw_printenv -n totalmem | tr -d 'M')
  mem_total=${mem_total:=64}
  os_mem_size=$(fw_printenv -n osmem | tr -d 'M')
  os_mem_size=${os_mem_size:=32}
  mmz_start=$(echo "$mem_start $os_mem_size" | awk 'BEGIN { temp = 0; } { temp = $1/1024/1024 + $2; } END { printf("0x%x00000\n", temp); }')
  mmz_size=$(echo "$mem_total $os_mem_size" | awk 'BEGIN { temp = 0; } { temp = $1 - $2; } END { printf("%dM\n", temp); }')
  mmz=anonymous,0,$mmz_start,$mmz_size
}


if [[ "$1" == 'gk' ]]; then
  echo "Allocator selected as gk..."
  get_env
  mem=${osmem:=32M}
  newbootargs="mem=${mem} console=${console} panic=${panic} rootfstype=${rootfstype} root=${root} init=${init} mtdparts=${mtdparts} mmz_allocator=gk ${extras}"
  echo ${newbootargs}
  fw_setenv bootargs ${newbootargs}
  #
elif [[ "$1" == 'cma'  ]]; then
  echo "Allocator selected as cma..."
  get_env
  calc_mmz
  mem=${totalmem:=64M}
  newbootargs="mem=${mem} console=${console} panic=${panic} rootfstype=${rootfstype} root=${root} init=${init} mtdparts=${mtdparts} mmz_allocator=cma mmz=${mmz} ${extras}"
  fw_setenv bootargs ${newbootargs}
  echo ${newbootargs}
else
  echo "NO or WRONG allocator, please select gk or cma."
  exit 1
fi