Add script to generate Linux/ACPICA divergences.

Simplify tracking of differences between Linux ACPICA code, and
the native ACPICA code.

generate/linux/divergence.sh

@@ -0,0 +1,101 @@
+#!/bin/bash
+#
+# Script to find the divergences between these sets of source code:
+#    1) The current ACPICA source from the ACPICA git tree
+#    2) The version of ACPICA that is integrated into Linux
+#
+# The goal is to eliminate as many differences as possible between
+# these two sets of code.
+#
+# Usage: ./divergence.sh <Path to root of linux source code>
+#
+
+if [ -z $1 ] ; then
+	echo "Usage: $0 <Linux>"
+	echo "  Linux: Path of Linux source"
+	exit 1
+fi
+
+# Get the root of the ACPICA source tree
+ACPICA=`readlink -f ../..`
+
+LINUX=$1
+LINDENT=$ACPICA/generate/linux/patches/lindent.sh
+ACPICA_TMP=acpica_tmp
+LINUX_ACPICA=linux-acpica
+ACPICA_LINUXIZED=acpica-linuxized
+
+#
+# Build the AcpiSrc utility if necessary
+#
+echo "Ensure the 32-bit AcpiSrc utility is up-to-date"
+make -C $ACPICA BITS=32 acpisrc
+ACPISRC=${ACPICA}/generate/unix/acpisrc/obj32/acpisrc
+
+#
+# Copy the actual Linux ACPICA files locally
+#
+echo "Create local Linux ACPICA files subdirectory"
+rm -rf $ACPICA_TMP $LINUX_ACPICA $ACPICA_LINUXIZED
+mkdir $ACPICA_TMP $LINUX_ACPICA
+
+cp $LINUX/drivers/acpi/acpica/* $LINUX_ACPICA/
+cp $LINUX/include/acpi/*.h $LINUX_ACPICA/
+cp $LINUX/include/acpi/platform/*.h $LINUX_ACPICA/
+
+#
+# Ensure that the files in the two directories match
+#
+cd $LINUX_ACPICA
+ALL_FILES=`ls`
+
+for f in $ALL_FILES ; do
+	tmp_f=`find $ACPICA/source -name $f`
+	if [ ! -z $tmp_f ] ; then
+		cp $tmp_f ../$ACPICA_TMP
+	else
+		rm $f
+	fi
+done
+
+#
+# Linuxize the ACPICA source
+#
+cd ..
+$ACPISRC -ldqy $ACPICA_TMP $ACPICA_LINUXIZED
+
+#
+# Enable cross platform generation
+#
+d2u -q $LINDENT
+d2u -q $ACPICA_LINUXIZED/*
+d2u -q $LINUX_ACPICA/*
+
+#
+# Lindent both sets of files
+#
+echo "Build lindented linuxized ACPICA files"
+cd $ACPICA_LINUXIZED
+find . -name "*.[ch]" | xargs $LINDENT
+rm -f *~
+cd ..
+
+echo "Build lindented actual linux ACPICA files"
+cd $LINUX_ACPICA
+find . -name "*.[ch]" | xargs $LINDENT
+rm -f *~
+cd ..
+
+#
+# Now we can finally do the big diff
+#
+echo "Create ACPICA/Linux diff"
+diff -E -b -w -B -rpuN $LINUX_ACPICA $ACPICA_LINUXIZED > divergence.diff
+ls -l divergence.diff
+
+#
+# Cleanup
+#
+rm -r $LINUX_ACPICA
+rm -r $ACPICA_TMP
+rm -r $ACPICA_LINUXIZED