From 4e3876d5be1118aae5318c91e431e8cfedf580b1 Mon Sep 17 00:00:00 2001
From: Anup Patel <anup.patel@wdc.com>
Date: Mon, 25 May 2020 14:42:35 +0530
Subject: Makefile: Add mechanism for platforms to have multiple builtin DTBs
Currently, we can only include one DTB as builtin for a platform
using FDT_PAYLOAD_DTB make variable in platform config.mk.
This patch adds new mechanism using which we can convert any DTS
file to C source and futher compile-n-link it with libplatsbi.a.
The generated C source will have the DTB contents as an array
"const char <varprefix>_start[]" where <varprefix> is specified
in platform objects.mk makefile.
Example1
--------
If we have built-in k210.dts and desired <varprefix> is
"dt_k210" then specify following in platform objects.mk:
platform-objs-y += k210.o
platform-varprefix-k210.o = dt_k210
Example2
--------
If we have built-in abc/k210.dts and desired <varprefix> is
"dt_abc_k210" then specify following in platform objects.mk:
platform-objs-y += abc/k210.o
platform-varprefix-abc-k210.o = dt_abc_k210
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
---
scripts/d2c.sh | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 67 insertions(+)
create mode 100755 scripts/d2c.sh
(limited to 'scripts')
diff --git a/scripts/d2c.sh b/scripts/d2c.sh
new file mode 100755
index 0000000..821a995
--- /dev/null
+++ b/scripts/d2c.sh
@@ -0,0 +1,67 @@
+#!/bin/bash
+
+function usage()
+{
+ echo "Usage:"
+ echo " $0 [options]"
+ echo "Options:"
+ echo " -h Display help or usage"
+ echo " -i <input_file_path> Input binary file path"
+ echo " -a <c_align> Output C array alignment"
+ echo " -p <c_prefix> Output C array name prefix"
+ exit 1;
+}
+
+# Command line options
+INPUT_PATH=""
+OUTPUT_C_ALIGN=""
+OUTPUT_C_PREFIX=""
+
+while getopts "hi:a:p:o:" o; do
+ case "${o}" in
+ h)
+ usage
+ ;;
+ i)
+ INPUT_PATH=${OPTARG}
+ ;;
+ a)
+ OUTPUT_C_ALIGN=${OPTARG}
+ ;;
+ p)
+ OUTPUT_C_PREFIX=${OPTARG}
+ ;;
+ *)
+ usage
+ ;;
+ esac
+done
+shift $((OPTIND-1))
+
+if [ -z "${INPUT_PATH}" ]; then
+ echo "Must specify input file path"
+ usage
+fi
+
+if [ ! -f "${INPUT_PATH}" ]; then
+ echo "The input path should be a file"
+ usage
+fi
+
+if [ -z "${OUTPUT_C_ALIGN}" ]; then
+ echo "Must provide output C array alignment"
+ usage
+fi
+
+if [ -z "${OUTPUT_C_PREFIX}" ]; then
+ echo "Must provide output C array name prefix"
+ usage
+fi
+
+printf "const char __attribute__((aligned(%s))) %s_start[] = {\n" "${OUTPUT_C_ALIGN}" "${OUTPUT_C_PREFIX}"
+
+od -v -t x1 -An ${INPUT_PATH} | awk '{for (i=1; i<=NF; i++) printf " 0x%s,", $i; printf "\n"; }'
+
+printf "};\n"
+
+printf "const unsigned long %s_size = sizeof(%s_start);\n" "${OUTPUT_C_PREFIX}" "${OUTPUT_C_PREFIX}"
--
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