1#!/bin/sh 2# 3# Copyright (C) 2017 Imagination Technologies 4# Author: Paul Burton <paul.burton@mips.com> 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 26srctree="$1" 27objtree="$2" 28ref_cfg="$3" 29cfg="$4" 30boards_origin="$5" 31shift 5 32 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. 36case ${boards_origin} in 37"command line") 38 print_skipped=1 39 ;; 40environment*) 41 print_skipped=1 42 ;; 43*) 44 print_skipped=0 45 ;; 46esac 47 48for board in $@; do 49 board_cfg="${srctree}/arch/mips/configs/generic/board-${board}.config" 50 if [ ! -f "${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 85 ${srctree}/scripts/kconfig/merge_config.sh \ 86 -m -O ${objtree} ${cfg} ${board_cfg} \ 87 | grep -Ev '^(#|Using)' 88done 89