[linux-block.git] / arch / mips / tools / generic-board-config.sh

#!/bin/sh
#
# Copyright (C) 2017 Imagination Technologies
# Author: Paul Burton <paul.burton@mips.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation;  either version 2 of the  License, or (at your
# option) any later version.
#
# 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 PB	1	#!/bin/sh
	2	#
	3	# Copyright (C) 2017 Imagination Technologies
48c834be	4	# Author: Paul Burton <paul.burton@mips.com>
27e0d4b0 PB	5	#
	6	# This program is free software; you can redistribute it and/or modify it
	7	# under the terms of the GNU General Public License as published by the
	8	# Free Software Foundation; either version 2 of the License, or (at your
	9	# option) any later version.
	10	#
	11	# This script merges configuration fragments for boards supported by the
	12	# generic MIPS kernel. It checks each for requirements specified using
	13	# formatted comments, and then calls merge_config.sh to merge those
	14	# fragments which have no unmet requirements.
	15	#
	16	# An example of requirements in your board config fragment might be:
	17	#
	18	# # require CONFIG_CPU_MIPS32_R2=y
	19	# # require CONFIG_CPU_LITTLE_ENDIAN=y
	20	#
	21	# This would mean that your board is only included in kernels which are
	22	# configured for little endian MIPS32r2 CPUs, and not for example in kernels
	23	# configured for 64 bit or big endian systems.
	24	#
	25
	26	srctree="$1"
	27	objtree="$2"
	28	ref_cfg="$3"
	29	cfg="$4"
	30	boards_origin="$5"
	31	shift 5
	32
27e0d4b0 PB	33	# Only print Skipping... lines if the user explicitly specified BOARDS=. In the
	34	# general case it only serves to obscure the useful output about what actually
	35	# was included.
	36	case ${boards_origin} in
	37	"command line")
	38	print_skipped=1
	39	;;
	40	environment*)
	41	print_skipped=1
	42	;;
	43	*)
	44	print_skipped=0
	45	;;
	46	esac
	47
	48	for board in $@; do
e1270575	49	board_cfg="${srctree}/arch/mips/configs/generic/board-${board}.config"
27e0d4b0 PB	50	if [ ! -f "${board_cfg}" ]; then
	51	echo "WARNING: Board config '${board_cfg}' not found"
	52	continue
	53	fi
	54
	55	# For each line beginning with # require, cut out the field following
	56	# it & search for that in the reference config file. If the requirement
	57	# is not found then the subshell will exit with code 1, and we'll
	58	# continue on to the next board.
	59	grep -E '^# require ' "${board_cfg}" \| \
	60	cut -d' ' -f 3- \| \
	61	while read req; do
	62	case ${req} in
	63	*=y)
	64	# If we require something =y then we check that a line
	65	# containing it is present in the reference config.
	66	grep -Eq "^${req}\$" "${ref_cfg}" && continue
	67	;;
	68	*=n)
	69	# If we require something =n then we just invert that
	70	# check, considering the requirement met if there isn't
	71	# a line containing the value =y in the reference
	72	# config.
	73	grep -Eq "^${req/%=n/=y}\$" "${ref_cfg}" \|\| continue
	74	;;
	75	*)
	76	echo "WARNING: Unhandled requirement '${req}'"
	77	;;
	78	esac
	79
	80	[ ${print_skipped} -eq 1 ] && echo "Skipping ${board_cfg}"
	81	exit 1
	82	done \|\| continue
	83
	84	# Merge this board config fragment into our final config file
e1270575	85	${srctree}/scripts/kconfig/merge_config.sh \
27e0d4b0 PB	86	-m -O ${objtree} ${cfg} ${board_cfg} \
	87	\| grep -Ev '^(#\|Using)'
	88	done