arch/x86/kernel/cpu/mkcapflags.sh

   1 #!/bin/sh
   2 #
   3 # Generate the x86_cap/bug_flags[] arrays from include/asm/cpufeatures.h
   4 #
   5
   6 IN=$1
   7 OUT=$2
   8
   9 dump_array()
  10 {
  11         ARRAY=$1
  12         SIZE=$2
  13         PFX=$3
  14         POSTFIX=$4
  15
  16         PFX_SZ=$(echo $PFX | wc -c)
  17         TABS="$(printf '\t\t\t\t\t')"
  18
  19         echo "const char * const $ARRAY[$SIZE] = {"
  20
  21         # Iterate through any input lines starting with #define $PFX
  22         sed -n -e 's/\t/ /g' -e "s/^ *# *define *$PFX//p" $IN |
  23         while read i
  24         do
  25                 # Name is everything up to the first whitespace
  26                 NAME="$(echo "$i" | sed 's/ .*//')"
  27
  28                 # If the /* comment */ starts with a quote string, grab that.
  29                 VALUE="$(echo "$i" | sed -n 's@.*/\* *\("[^"]*"\).*\*/@\1@p')"
  30                 [ -z "$VALUE" ] && VALUE="\"$NAME\""
  31                 [ "$VALUE" = '""' ] && continue
  32
  33                 # Name is uppercase, VALUE is all lowercase
  34                 VALUE="$(echo "$VALUE" | tr A-Z a-z)"
  35
  36         if [ -n "$POSTFIX" ]; then
  37             T=$(( $PFX_SZ + $(echo $POSTFIX | wc -c) + 2 ))
  38                 TABS="$(printf '\t\t\t\t\t\t')"
  39                     TABCOUNT=$(( ( 6*8 - ($T + 1) - $(echo "$NAME" | wc -c) ) / 8 ))
  40                     printf "\t[%s - %s]%.*s = %s,\n" "$PFX$NAME" "$POSTFIX" "$TABCOUNT" "$TABS" "$VALUE"
  41         else
  42                     TABCOUNT=$(( ( 5*8 - ($PFX_SZ + 1) - $(echo "$NAME" | wc -c) ) / 8 ))
  43             printf "\t[%s]%.*s = %s,\n" "$PFX$NAME" "$TABCOUNT" "$TABS" "$VALUE"
  44         fi
  45         done
  46         echo "};"
  47 }
  48
  49 trap 'rm "$OUT"' EXIT
  50
  51 (
  52         echo "#ifndef _ASM_X86_CPUFEATURES_H"
  53         echo "#include <asm/cpufeatures.h>"
  54         echo "#endif"
  55         echo ""
  56
  57         dump_array "x86_cap_flags" "NCAPINTS*32" "X86_FEATURE_" ""
  58         echo ""
  59
  60         dump_array "x86_bug_flags" "NBUGINTS*32" "X86_BUG_" "NCAPINTS*32"
  61
  62 ) > $OUT
  63
  64 trap - EXIT