[mirror_ubuntu-hirsute-kernel.git] / arch / mips / tools / generic-board-config.sh

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
#
# Copyright (C) 2017 Imagination Technologies
# Author: Paul Burton <paul.burton@mips.com>
#
# This script merges configuration fragments for boards supported by the
# generic MIPS kernel. It checks each for requirements specified using
# formatted comments, and then calls merge_config.sh to merge those
# fragments which have no unmet requirements.
#
# An example of requirements in your board config fragment might be:
#
# # require CONFIG_CPU_MIPS32_R2=y
# # require CONFIG_CPU_LITTLE_ENDIAN=y
#
# This would mean that your board is only included in kernels which are
# configured for little endian MIPS32r2 CPUs, and not for example in kernels
# configured for 64 bit or big endian systems.
#

srctree="$1"
objtree="$2"
ref_cfg="$3"
cfg="$4"
boards_origin="$5"
shift 5

# Only print Skipping... lines if the user explicitly specified BOARDS=. In the
# general case it only serves to obscure the useful output about what actually
# was included.
case ${boards_origin} in
"command line")
	print_skipped=1
	;;
environment*)
	print_skipped=1
	;;
*)
	print_skipped=0
	;;
esac

for board in $@; do
	board_cfg="${srctree}/arch/mips/configs/generic/board-${board}.config"
	if [ ! -f "${board_cfg}" ]; then
		echo "WARNING: Board config '${board_cfg}' not found"
		continue
	fi

	# For each line beginning with # require, cut out the field following
	# it & search for that in the reference config file. If the requirement
	# is not found then the subshell will exit with code 1, and we'll
	# continue on to the next board.
	grep -E '^# require ' "${board_cfg}" | \
	    cut -d' ' -f 3- | \
	    while read req; do
		case ${req} in
		*=y)
			# If we require something =y then we check that a line
			# containing it is present in the reference config.
			grep -Eq "^${req}\$" "${ref_cfg}" && continue
			;;
		*=n)
			# If we require something =n then we just invert that
			# check, considering the requirement met if there isn't
			# a line containing the value =y in the reference
			# config.
			grep -Eq "^${req/%=n/=y}\$" "${ref_cfg}" || continue
			;;
		*)
			echo "WARNING: Unhandled requirement '${req}'"
			;;
		esac

		[ ${print_skipped} -eq 1 ] && echo "Skipping ${board_cfg}"
		exit 1
	done || continue

	# Merge this board config fragment into our final config file
	${srctree}/scripts/kconfig/merge_config.sh \
		-m -O ${objtree} ${cfg} ${board_cfg} \
		| grep -Ev '^(#|Using)'
done
Commit	Line	Data
27e0d4b0	1	#!/bin/sh
2874c5fd	2	# SPDX-License-Identifier: GPL-2.0-or-later
27e0d4b0 PB	3	#
27e0d4b0 PB	4	# Copyright (C) 2017 Imagination Technologies
fb615d61	5	# Author: Paul Burton <paul.burton@mips.com>
27e0d4b0	6	#
27e0d4b0 PB	7	# This script merges configuration fragments for boards supported by the
	8	# generic MIPS kernel. It checks each for requirements specified using
	9	# formatted comments, and then calls merge_config.sh to merge those
	10	# fragments which have no unmet requirements.
	11	#
	12	# An example of requirements in your board config fragment might be:
	13	#
	14	# # require CONFIG_CPU_MIPS32_R2=y
	15	# # require CONFIG_CPU_LITTLE_ENDIAN=y
	16	#
	17	# This would mean that your board is only included in kernels which are
	18	# configured for little endian MIPS32r2 CPUs, and not for example in kernels
	19	# configured for 64 bit or big endian systems.
	20	#
	21
	22	srctree="$1"
	23	objtree="$2"
	24	ref_cfg="$3"
	25	cfg="$4"
	26	boards_origin="$5"
	27	shift 5
	28
27e0d4b0 PB	29	# Only print Skipping... lines if the user explicitly specified BOARDS=. In the
	30	# general case it only serves to obscure the useful output about what actually
	31	# was included.
	32	case ${boards_origin} in
	33	"command line")
	34	print_skipped=1
	35	;;
	36	environment*)
	37	print_skipped=1
	38	;;
	39	*)
	40	print_skipped=0
	41	;;
	42	esac
	43
	44	for board in $@; do
e1270575	45	board_cfg="${srctree}/arch/mips/configs/generic/board-${board}.config"
27e0d4b0 PB	46	if [ ! -f "${board_cfg}" ]; then
	47	echo "WARNING: Board config '${board_cfg}' not found"
	48	continue
	49	fi
	50
	51	# For each line beginning with # require, cut out the field following
	52	# it & search for that in the reference config file. If the requirement
	53	# is not found then the subshell will exit with code 1, and we'll
	54	# continue on to the next board.
	55	grep -E '^# require ' "${board_cfg}" \| \
	56	cut -d' ' -f 3- \| \
	57	while read req; do
	58	case ${req} in
	59	*=y)
	60	# If we require something =y then we check that a line
	61	# containing it is present in the reference config.
	62	grep -Eq "^${req}\$" "${ref_cfg}" && continue
	63	;;
	64	*=n)
	65	# If we require something =n then we just invert that
	66	# check, considering the requirement met if there isn't
	67	# a line containing the value =y in the reference
	68	# config.
	69	grep -Eq "^${req/%=n/=y}\$" "${ref_cfg}" \|\| continue
	70	;;
	71	*)
	72	echo "WARNING: Unhandled requirement '${req}'"
	73	;;
	74	esac
	75
	76	[ ${print_skipped} -eq 1 ] && echo "Skipping ${board_cfg}"
	77	exit 1
	78	done \|\| continue
	79
	80	# Merge this board config fragment into our final config file
e1270575	81	${srctree}/scripts/kconfig/merge_config.sh \
27e0d4b0 PB	82	-m -O ${objtree} ${cfg} ${board_cfg} \
	83	\| grep -Ev '^(#\|Using)'
	84	done