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#!/usr/bin/python
# IBM_PROLOG_BEGIN_TAG
# This is an automatically generated prolog.
#
# $Source: src/boot/sbeCompression.py $
#
# OpenPOWER sbe Project
#
# Contributors Listed Below - COPYRIGHT 2017
# [+] International Business Machines Corp.
#
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied. See the License for the specific language governing
# permissions and limitations under the License.
#
# IBM_PROLOG_END_TAG
import os
import subprocess
import re
import random
import sys
import binascii
import fileinput
import argparse
import struct
import operator
err = False
def compress(inputFile, compressedFile):
try:
f = open(inputFile, "rb")
except IOError as e :
print "I/O error File for File to be compressed."
sys.exit()
try:
fW = open(compressedFile, "wb")
except IOError as e :
print "I/O error File for compressed file."
sys.exit()
if os.stat(inputFile).st_size < 4 :
print "File is less than four bytes."
sys.exit()
instDict = dict()
for i in range(0, os.stat(inputFile).st_size / 4 ):
fourByt = f.read(4)
if fourByt in instDict:
iCount = instDict[fourByt]
instDict[fourByt] = iCount + 1;
else :
iCount = 1
instDict[fourByt] = iCount
sortedList = sorted(instDict.iteritems(), key=operator.itemgetter(1), reverse = True)
sortedList[256:] = []
instList = []
iCount = 0
for k, v in sortedList:
instList.append(k)
for x in instList:
fW.write(x)
fileSize = os.stat(inputFile).st_size
fW.write(struct.pack(">Q",fileSize))
f.seek(0, 0)
strBits = ""
count = 0
#Create a bitmap for each four bytes of binary.
for i in range(0, os.stat(inputFile).st_size / 4 ):
fourByt = f.read(4)
if fourByt in instList:
strBits += '1'
else :
strBits += '0'
if ((len(strBits) == 32) or (i == (os.stat(inputFile).st_size / 4) - 1)):
value = int(strBits, 2)
fW.write(struct.pack('>I', value))
strBits = ""
count = count + 1
value = 0
#To make the bit map eight byte alligned in compressed image.
if ((count % 2) == 0):
padCount = count
else:
padCount = count + 1
for i in range(count, padCount):
fW.write(struct.pack('>I', value))
f.seek(0, 0)
for i in range(0, os.stat(inputFile).st_size / 4 ):
fourByt = f.read(4)
if fourByt in instList:
ind = instList.index(fourByt)
fW.write(struct.pack('>B', ind))
else:
fW.write(fourByt)
f.close()
fW.close()
def main( argv ):
parser = argparse.ArgumentParser( description = "SBE Compression Parser" )
parser.add_argument( '-l', '--imageLoc', type=str, help = 'Seeprom Binary Location' )
parser.add_argument( '-i', '--image', type=str, help = 'Seeprom Binary ' )
args = parser.parse_args()
imagePath = args.imageLoc
image = args.image
#Make a copy of SEEPROM binary.
cmd1 = "cp " + imagePath + "/" + image + " " + imagePath + "/" + image + ".orig"
rc = os.system(cmd1)
if rc:
print "Unable to make copy of seeprom binary"
sys.exit()
#Extract base from SEEPROM binary.
cmd2 = imagePath + "/p9_xip_tool " + imagePath + "/" + image + " extract .base " + imagePath + "/" + image + ".base"
rc = os.system(cmd2)
if rc:
print "Unable to extract the base from seeprom binary"
sys.exit()
#Compress the base section
compress(imagePath + "/" + image + ".base", imagePath + "/" + image + ".base.compressed")
#Delete the base section from SEEPEOM binary.
cmd3 = imagePath + "/p9_xip_tool " + imagePath + "/" + image + " delete .base"
rc = os.system(cmd3)
if rc:
print "Unable to delete base section from seeprom binary"
sys.exit()
#Append the base section from SEEPEOM binary.
cmd4 = imagePath + "/p9_xip_tool " + imagePath + "/" + image + " append .base " + imagePath + "/" + image + ".base.compressed"
rc = os.system(cmd4)
if rc:
print "Unable to append the base section"
sys.exit()
if __name__ == "__main__":
main( sys.argv )
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