Makefile: Add support for generating C array at compile time

Generating C array at compile time based on details provided by
objects.mk is a very useful feature which will help us compile
only a subset of drivers or modules.

We add a bash script (carray.sh) which takes array details and
object/variable list from command-line to generate a C source
containing array of object/variable pointers. We also extend
top-level makefile to use carray.sh whenever specified through
objects.mk.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Anup Patel 2022-05-13 09:26:00 +05:30 committed by Anup Patel
parent f726f2dc01
commit 7fb474b9dd
2 changed files with 88 additions and 0 deletions

View File

@ -404,6 +404,10 @@ compile_d2c = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
$(if $($(2)-varprefix-$(3)),$(eval D2C_NAME_PREFIX := $($(2)-varprefix-$(3))),$(eval D2C_NAME_PREFIX := $(5))) \
$(if $($(2)-padding-$(3)),$(eval D2C_PADDING_BYTES := $($(2)-padding-$(3))),$(eval D2C_PADDING_BYTES := 0)) \
$(src_dir)/scripts/d2c.sh -i $(6) -a $(D2C_ALIGN_BYTES) -p $(D2C_NAME_PREFIX) -t $(D2C_PADDING_BYTES) > $(1)
compile_carray = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
echo " CARRAY $(subst $(build_dir)/,,$(1))"; \
$(eval CARRAY_VAR_LIST := $(carray-$(subst .c,,$(shell basename $(1)))-y)) \
$(src_dir)/scripts/carray.sh -i $(2) -l "$(CARRAY_VAR_LIST)" > $(1)
compile_gen_dep = $(CMD_PREFIX)mkdir -p `dirname $(1)`; \
echo " GEN-DEP $(subst $(build_dir)/,,$(1))"; \
echo "$(1:.dep=$(2)): $(3)" >> $(1)
@ -451,6 +455,13 @@ $(build_dir)/%.dep: $(src_dir)/%.S
$(build_dir)/%.o: $(src_dir)/%.S
$(call compile_as,$@,$<)
$(build_dir)/%.dep: $(src_dir)/%.carray
$(call compile_gen_dep,$@,.c,$<)
$(call compile_gen_dep,$@,.o,$(@:.dep=.c))
$(build_dir)/%.c: $(src_dir)/%.carray
$(call compile_carray,$@,$<)
$(platform_build_dir)/%.bin: $(platform_build_dir)/%.elf
$(call compile_objcopy,$@,$<)

77
scripts/carray.sh Executable file
View File

@ -0,0 +1,77 @@
#!/bin/bash
function usage()
{
echo "Usage:"
echo " $0 [options]"
echo "Options:"
echo " -h Display help or usage"
echo " -i <input_config> Input config file"
echo " -l <variable_list> List of variables in the array (Optional)"
exit 1;
}
# Command line options
CONFIG_FILE=""
VAR_LIST=""
while getopts "hi:l:" o; do
case "${o}" in
h)
usage
;;
i)
CONFIG_FILE=${OPTARG}
;;
l)
VAR_LIST=${OPTARG}
;;
*)
usage
;;
esac
done
shift $((OPTIND-1))
if [ -z "${CONFIG_FILE}" ]; then
echo "Must specify input config file"
usage
fi
if [ ! -f "${CONFIG_FILE}" ]; then
echo "The input config file should be a present"
usage
fi
TYPE_HEADER=`cat ${CONFIG_FILE} | awk '{ if ($1 == "HEADER:") { printf $2; exit 0; } }'`
if [ -z "${TYPE_HEADER}" ]; then
echo "Must specify HEADER: in input config file"
usage
fi
TYPE_NAME=`cat ${CONFIG_FILE} | awk '{ if ($1 == "TYPE:") { printf $2; for (i=3; i<=NF; i++) printf " %s", $i; exit 0; } }'`
if [ -z "${TYPE_NAME}" ]; then
echo "Must specify TYPE: in input config file"
usage
fi
ARRAY_NAME=`cat ${CONFIG_FILE} | awk '{ if ($1 == "NAME:") { printf $2; exit 0; } }'`
if [ -z "${ARRAY_NAME}" ]; then
echo "Must specify NAME: in input config file"
usage
fi
printf "#include <%s>\n\n" "${TYPE_HEADER}"
for VAR in ${VAR_LIST}; do
printf "extern %s %s;\n" "${TYPE_NAME}" "${VAR}"
done
printf "\n"
printf "%s *%s[] = {\n" "${TYPE_NAME}" "${ARRAY_NAME}"
for VAR in ${VAR_LIST}; do
printf "\t&%s,\n" "${VAR}"
done
printf "};\n\n"
printf "unsigned long %s_size = sizeof(%s) / sizeof(%s *);\n" "${ARRAY_NAME}" "${ARRAY_NAME}" "${TYPE_NAME}"