Build script for generating DTB binaries

Signed-off-by: Rajarshi Das <drajarshi@in.ibm.com>

1 files changed, 140 insertions, 0 deletions

diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..507e4f1
--- /dev/null
+++ b/build.sh
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+#!/bin/bash
+#
+# Build script to create DTBs from In Memory Accumulation (IMA) Catalog repository.
+#
+# For a given platform, we could have multiple DTS (Device Tree Source) file.
+# Build script first builds DTB (Device Tree Binary) file from DTS using dtc
+# compiler. It then packs generated DTBs to one single binary file called
+# "ima_catalog.bin". This "ima_catalog.bin" is what is flashed to PNOR partition.
+#
+# Based on "openpower/capp-ucode" build.sh script.
+#
+
+#
+# #define PNOR_SUBPART_HEADER_SIZE 0x1000
+# struct pnor_hostboot_toc {
+# 	be32 ec;
+# 	be32 offset; /* from start of header.  4K aligned */
+# 	be32 size; /* */
+# };
+# #define PNOR_HOSTBOOT_TOC_MAX_ENTRIES ((PNOR_SUBPART_HEADER_SIZE - 8)/sizeof(struct pnor_hostboot_toc))
+# struct pnor_hostboot_header {
+# 	char eyecatcher[4];
+# 	be32 version;
+# 	struct pnor_hostboot_toc toc[PNOR_HOSTBOOT_TOC_MAX_ENTRIES];
+# };
+
+#
+# Two parameters are passed to this script
+# 1)Path to host-tools -- we need this for the dtc and xz commands.
+# 2)Platform to build  -- We need this to pick the right DTS file.
+#
+
+declare -a ima_arr
+declare -a ima_pvr
+declare -a ima_file
+
+#Catalog files to pickup for a given platform
+declare -a POWER8=('81E00610.4D0100.dts' '81E00610.4D0200.dts')
+declare -a POWER8_PVR=(0x4d0100 0x4d0200)
+declare -a POWER8_FILENAME=(0x4d0100.bin 0x4d0200.bin)
+
+declare -a POWER9=('81E00612.4E0100.dts')
+declare -a POWER9_PVR=(0x4e0100)
+declare -a POWER9_FILENAME=(0x4e0100.bin)
+
+align() {
+    echo $(( (($1 + ($alignment - 1))) & ~($alignment - 1) ))
+}
+
+if [ "$2" == "POWER8" ]; then
+   ima_arr=("${POWER8[@]}")
+   ima_pvr=("${POWER8_PVR[@]}")
+   ima_file=("${POWER8_FILENAME[@]}")
+elif [ "$2" == "POWER9" ]; then
+   ima_arr=("${POWER9[@]}")
+   ima_pvr=("${POWER9_PVR[@]}")
+   ima_file=("${POWER9_FILENAME[@]}")
+fi
+
+entries=$((${#ima_arr[@]}))
+debug=true
+if [ -n "$DEBUG" ] ; then
+    debug=echo
+fi
+
+#Generate the Device Tree Binary (DTB) files from DTS (text)
+if [ $entries -gt 0 ]; then
+    for i in $(seq 0 $(($entries - 1)) ) ; do
+	$1/dtc -O dtb -I dts -o ${ima_file[${i}]} ${ima_arr[${i}]}
+	$1/xz -9 -C crc32 ${ima_file[${i}]}
+	mv ${ima_file[${i}]}.xz ${ima_file[${i}]}
+
+	size=$( stat -c %s ${ima_file[${i}]} )
+	if [ "$2" == "POWER8" ]; then
+	    pad=$(( 8000 - $(($size))))
+	else
+	    pad=$(( 32768 - $(($size))))
+	fi
+	dd if=/dev/zero count=$pad bs=1 >> ${ima_file[${i}]}
+    done
+fi
+
+#Create a tmp file for manipulation
+TMPFILE=$(mktemp)
+
+EYECATCHER=$(( 0x494D4143 )) # ascii 'IMAC'
+VERSION=1
+NUMBEROFTOCENTRIES=$entries
+
+printf "0: %.8x" $EYECATCHER | xxd -r -g0 >> $TMPFILE
+printf "0: %.8x" $VERSION | xxd -r -g0 >> $TMPFILE
+
+sections=0
+alignment=$(( 0x1000 ))
+offset=$alignment
+
+
+for i in $(seq 0 $(($NUMBEROFTOCENTRIES - 1 ))) ; do
+    # Work out if we added this file already
+    matched=0
+    for s in $(seq $sections); do
+        if cmp -s ${ima_file[$i]} ${sectionfile[$s]} ; then
+            $debug matched ${ima_file[$i]} ${sectionfile[$s]}
+            matched=1
+            section=$s
+            break 1
+        fi
+    done
+    if [ $matched == 0 ] ; then
+        sections=$(( $sections + 1 ))
+        sectionfile[$sections]=${ima_file[$i]}
+        sectionsize[$sections]=$( stat -c %s ${sectionfile[$sections]} )
+        sectionoffset[$sections]=$(align $offset)
+        offset=$(( $offset + ${sectionsize[$sections]} ))
+        $debug Adding section ${ima_file[$i]} size: ${sectionsize[$sections]} offset: ${sectionoffset[$sections]}
+        section=$sections
+    fi
+
+    # Add TOC entry for every DTB to
+    printf "0: %.8x" ${ima_pvr[$i]} | xxd -r -g0 >> $TMPFILE
+    printf "0: %.8x" ${sectionoffset[$section]} | xxd -r -g0 >> $TMPFILE
+    printf "0: %.8x" ${sectionsize[$section]} | xxd -r -g0 >> $TMPFILE
+done
+
+# write zeros to alignment
+bytes=$(( $alignment - 8 - ($NUMBEROFTOCENTRIES * 12) ))
+dd if=/dev/zero count=$bytes bs=1 >> $TMPFILE
+
+# Add file sections
+for i in $(seq $sections) ; do
+    cat ${sectionfile[$i]} >> $TMPFILE
+
+    # write zeros to alignment
+    bytes=$(( $(align ${sectionsize[$i]}) - ${sectionsize[$i]} ))
+    dd if=/dev/zero count=$bytes bs=1 >> $TMPFILE
+done
+
+mv $TMPFILE ima_catalog.bin
+rm -rf $TMPFILE
+