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>
---
Makefile | 17 +++++++++++++++
scripts/d2c.sh | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 84 insertions(+)
create mode 100755 scripts/d2c.sh
diff --git a/Makefile b/Makefile
index 5c08414..bf9c983 100644
--- a/Makefile
+++ b/Makefile
@@ -290,6 +290,12 @@ compile_objcopy = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
compile_dts = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
echo " DTC $(subst $(build_dir)/,,$(1))"; \
$(CPP) $(DTSCPPFLAGS) $(2) | $(DTC) -O dtb -i `dirname $(2)` -o $(1)
+compile_d2c = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
+ echo " D2C $(subst $(build_dir)/,,$(1))"; \
+ $(src_dir)/scripts/d2c.sh -i $(4) -a $(3) -p $(2) > $(1)
+compile_gen_dep = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
+ echo " GEN-DEP $(subst $(build_dir)/,,$(1))"; \
+ echo "$(1:.dep=$(2)): $(3)" >> $(1)
targets-y = $(build_dir)/lib/libsbi.a
targets-y += $(build_dir)/lib/libsbiutils.a
@@ -342,12 +348,23 @@ $(platform_build_dir)/%.dep: $(platform_src_dir)/%.c
$(platform_build_dir)/%.o: $(platform_src_dir)/%.c
$(call compile_cc,$@,$<)
+$(platform_build_dir)/%.o: $(platform_build_dir)/%.c
+ $(call compile_cc,$@,$<)
+
$(platform_build_dir)/%.dep: $(platform_src_dir)/%.S
$(call compile_as_dep,$@,$<)
$(platform_build_dir)/%.o: $(platform_src_dir)/%.S
$(call compile_as,$@,$<)
+$(platform_build_dir)/%.dep: $(platform_src_dir)/%.dts
+ $(call compile_gen_dep,$@,.dtb,$<)
+ $(call compile_gen_dep,$@,.c,$(@:.dep=.dtb))
+ $(call compile_gen_dep,$@,.o,$(@:.dep=.c))
+
+$(platform_build_dir)/%.c: $(platform_build_dir)/%.dtb
+ $(call compile_d2c,$@,$(platform-varprefix-$(subst .dtb,.o,$(subst /,-,$(subst $(platform_build_dir)/,,$<)))),16,$<)
+
$(platform_build_dir)/%.dtb: $(platform_src_dir)/%.dts
$(call compile_dts,$@,$<)
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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