util/scripts/dts-to-fmd.sh

   1 #!/usr/bin/env bash
   2 # SPDX-License-Identifier: GPL-2.0-only
   3
   4 # converts a depthcharge fmap.dts into an fmaptool compatible .fmd format
   5 # requires fdt utilities (dtc, fdtget)
   6 #
   7 # $1 dts file name
   8 # result on stdout
   9 set -e
  10
  11 if [ $# -lt 1 ]; then
  12         echo "usage: $0 dts-file"
  13         exit 1
  14 fi
  15
  16 DTS=$1
  17 DTB=`mktemp`
  18
  19 # $1 node
  20 # $2 start variable name
  21 # $3 size variable name
  22 get_reg() {
  23         local t=`fdtget -t x $DTB $1 reg 2>/dev/null`
  24         if [ -n "$t" ]; then
  25                 export $2=0x`echo $t|cut -d' ' -f1`
  26                 export $3=0x`echo $t|cut -d' ' -f2`
  27         else
  28                 export $3=0x`fdtget -t x $DTB $1 size`
  29         fi
  30 }
  31
  32 dtc -O dtb -o $DTB $DTS
  33 get_reg /flash ROM_START ROM_SIZE
  34 printf "FLASH@${ROM_START} ${ROM_SIZE} {"
  35
  36 PREFIX="\t"
  37 REGION_START=-1
  38 REGION_SIZE=0
  39 CONTAINER_END=$(( ${ROM_SIZE} ))
  40 CONTAINER_END_STACK=${CONTAINER_END}
  41 CONTAINER_OFFSET=0
  42 CONTAINER_OFFSET_STACK=0
  43
  44 FMAP_REGIONS=`fdtget -l $DTB /flash`
  45 for region in $FMAP_REGIONS; do
  46         OLD_REGION_START=$REGION_START
  47         OLD_REGION_SIZE=$REGION_SIZE
  48         get_reg /flash/$region REGION_START REGION_SIZE
  49
  50         # determine if we're past an existing container
  51         while [ $(( ${REGION_START} )) -ge ${CONTAINER_END} ]; do
  52                 PREFIX=`printf "${PREFIX}" | cut -c2-`
  53                 printf "\n${PREFIX}}"
  54                 CONTAINER_END_STACK=`printf "${CONTAINER_END_STACK}" | cut -d' ' -f2-`
  55                 CONTAINER_OFFSET_STACK=`printf "${CONTAINER_OFFSET_STACK}" | cut -d' ' -f2-`
  56                 CONTAINER_END=`printf ${CONTAINER_END_STACK} | cut -d' ' -f1`
  57                 CONTAINER_OFFSET=`printf ${CONTAINER_OFFSET_STACK} | cut -d' ' -f1`
  58         done
  59
  60         # determine if we're inside a new container region now
  61         if [ $(( ${OLD_REGION_START} + ${OLD_REGION_SIZE} )) -gt $(( ${REGION_START} )) ]; then
  62                 PREFIX="\t${PREFIX}"
  63                 CONTAINER_END=$(( ${OLD_REGION_START} + ${OLD_REGION_SIZE} ))
  64                 CONTAINER_OFFSET=$(( ${OLD_REGION_START} ))
  65                 CONTAINER_END_STACK="${CONTAINER_END} ${CONTAINER_END_STACK}"
  66                 CONTAINER_OFFSET_STACK="${CONTAINER_OFFSET} ${CONTAINER_OFFSET_STACK}"
  67                 printf " {"
  68         fi
  69
  70         LOCAL_REGION_START=$(( ${REGION_START} - ${CONTAINER_OFFSET} ))
  71         LOCAL_REGION_START=`printf "0x%x" ${LOCAL_REGION_START}`
  72
  73         REGION_NAME=`fdtget $DTB /flash/$region label | tr '[a-z]-' '[A-Z]_'`
  74         REGION_TYPE=`fdtget $DTB /flash/$region type 2>/dev/null | cut -d'/' -f1`
  75
  76         # a CBFS region? if so, mark as such
  77         if [ "${REGION_TYPE}" = "blob cbfs" ]; then
  78                 IS_CBFS="(CBFS)"
  79         else
  80                 IS_CBFS=""
  81         fi
  82
  83         # special handling: rename BOOT_STUB to COREBOOT, mark them as CBFS
  84         if [ "${REGION_NAME}" = "BOOT_STUB" ]; then
  85                 REGION_NAME="COREBOOT"
  86         fi
  87         if [ "${REGION_NAME}" = "COREBOOT" ]; then
  88                 IS_CBFS="(CBFS)"
  89         fi
  90
  91         # also mark RW_LEGACY (seabios et al) as CBFS
  92         if [ "${REGION_NAME}" = "RW_LEGACY" ]; then
  93                 IS_CBFS="(CBFS)"
  94         fi
  95
  96         # special handling: COREBOOT region at 0, inject a 128K bootblock
  97         # The size may need changes to accommodate the chipsets,
  98         # but should work for now.
  99         if [ "${REGION_NAME}" = "COREBOOT" -a \
 100                 $(( ${REGION_START} )) -eq 0 ]; then
 101                 printf "\n${PREFIX}BOOTBLOCK@0 128K"
 102                 LOCAL_REGION_START=$(( ${LOCAL_REGION_START} + 128*1024 ))
 103                 LOCAL_REGION_START=`printf 0x%x ${LOCAL_REGION_START}`
 104                 REGION_SIZE=$(( ${REGION_SIZE} - 128*1024 ))
 105                 REGION_SIZE=`printf 0x%x ${REGION_SIZE}`
 106         fi
 107
 108         printf "\n${PREFIX}${REGION_NAME}${IS_CBFS}@${LOCAL_REGION_START} ${REGION_SIZE}"
 109 done
 110
 111 while [ -n "${PREFIX}" ]; do
 112         PREFIX=`printf "${PREFIX}" | cut -c2-`
 113         printf "\n${PREFIX}}"
 114 done
 115 printf "\n"
 116
 117 rm -f $DTB