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#!/usr/bin/python
# -*- python -*-
# Copyright (c) 2005-2006 Arch Rock Corporation
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the
#   distribution.
# - Neither the name of the Arch Rock Corporation nor the names of
#   its contributors may be used to endorse or promote products derived
#   from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
# ARCHED ROCK OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
# OF THE POSSIBILITY OF SUCH DAMAGE
#
# @author Jonathan Hui <jhui@archedrock.com>
# @author Kaisen Lin
#
# $Revision: 1.7 $
# $Date: 2009-10-28 04:19:20 $
#
                                  
from re import match
from sys import *
from xml.dom import minidom

from getopt import *
import string
import commands
#New way of handling arguments........
try:
  opts, args = getopt(argv[1:], "t", [])
except GetoptError, err:
  print str(err) # will print something like "option -a not recognized"
  stderr.write( "Usage: tos-storage-stm25p [-t] <platform directory>\n" )
  
if len( args ) == 1:
  platformdir = args[0]
  # This gives the whole string when there's no / in platformdir
  platform = platformdir[platformdir.rfind( "/" ) + 1:]
elif len( args ) == 0:
  platformdir = ""
  platform = ""
else:
  stderr.write( "Usage: tos-storage-stm25p [-t] <platform directory>\n" )
  
cthreads = False
for o, a in opts:
  if o == "-t":
    cthreads = True
  else:
    assert False, "unhandled option"

NUM_SECTORS = 16
SECTOR_SIZE = 2097152

volumes = {}

volumeNames = []
volumeSizes = []
volumeOffsets = []
volumeTypes = dict()
volumeOptions = dict()
freeSectors = NUM_SECTORS*[ True ]

def error_exit( s ):
    stderr.write( "ERROR: " + s + "\n" )
    exit( 2 )

try:
    dom = minidom.parse( stdin )
except xml.parsers.expat.ExpatError:
    error_exit( "input invalid" )

# initialize reserved piece
volumes [ "PXARESERVED" ] = "blah"
volumeNames.append( "VOLUME_PXARESERVED" )
volumeSizes.append( 1 )
volumeOffsets.append( 0 )
volumeTypes[ "VOLUME_PXARESERVED" ] = ""
freeSectors[ 0 ] = False

# extract information
for volume in dom.documentElement.getElementsByTagName( "volume" ):
    name = volume.getAttribute( "name" )
    size = volume.getAttribute( "size" )
    base = volume.getAttribute( "base" )
    type = string.lower(volume.getAttribute("type"))
    isCircular = string.upper(volume.getAttribute("circular"))
    if isCircular == "":
      isCircular = "FALSE"
          
    if name == "":
        error_exit( "volume has no name" )
    elif not match( "^[a-zA-Z0-9_]+$", name ):
        error_exit( "volume has invalid name '%s'" % name )
    elif volumes.has_key( name ):
        error_exit( "duplicate volume definition '%s'" % name )
    else:
        volumes[ name ] = "blah"
    
    if size == "":
        error_exit( "volume '%s' has no size" % name )
    try:
        size = int( size )
    except ValueError:
        error_exit( "volume '%s' has invalid size" % name )
    if base != "":
        try:
            base = int( base )
        except ValueError:
            error_exit( "volume '%s' has invalid base" % name )

    if ( size & ( SECTOR_SIZE - 1 ) ) != 0:
        error_exit( "size of volume '%s' is not a multiple of %d" % \
                    ( name, SECTOR_SIZE ) )
    if base != "" and ( base & ( SECTOR_SIZE - 1 ) ) != 0:
        error_exit( "base of volume '%s' is not a multiple of %d" % \
                    ( name, SECTOR_SIZE ) )

    volumeNames.append( "VOLUME_" + name )
    volumeSizes.append( size / SECTOR_SIZE )
    volumeTypes["VOLUME_" + name] = type
    volumeOptions["VOLUME_" + name] = isCircular
      
    if base == "":
        volumeOffsets.append( -1 )
    else:
        base = base / SECTOR_SIZE
        volumeOffsets.append( base )
        for i in range( size / SECTOR_SIZE ):
            freeSectors[ i + base ] = False

# allocate with first fit policy
for i in range( len( volumeOffsets ) ):
    size = volumeSizes[ i ]
    if volumeOffsets[ i ] == -1:
        for j in range( NUM_SECTORS ):
            if freeSectors[ j ]:
                size -= 1
                if size == 0:
                    volumeOffsets[ i ] = j - ( volumeSizes[ i ] - 1 )
                    break
            else:
                size = volumeSizes[ i ]
        if volumeOffsets[ i ] == -1:
            raise "Unable to satisfy allocation request."
        else:
            for j in range( volumeSizes[ i ] ):
                freeSectors[ volumeOffsets[ i ] + j ] = False

# output C file

print "#ifndef __STORAGE_VOLUME_H__"
print "#define __STORAGE_VOLUME_H__"
print ""
print "#include \"P30.h\""
print ""

for i in range( len( volumeNames ) ):
    print "#define %s %d" % ( volumeNames[ i ], i )
    print "#define %s %s" % ( volumeNames[ i ] + "_UQ", "unique(\"pxa27xp30.Volume\")" )
print "#define _V_NUMVOLS_ %d" % ( len( volumeNames ))
print ""
        
print "static const p30_volume_info_t P30_VMAP[ %d ] = {" % \
      len( volumeNames )
for i in range( len( volumeNames ) ):
    print "    { base : %d, size : %d }," % \
          ( volumeOffsets[ i ], volumeSizes[ i ] )
print "};"

print ""
print "#endif"

# output nc file for threads
if cthreads == True:
  outFile = open(commands.getstatusoutput("pwd")[1] + "/VolumeMapC.nc", "w")
  outFile.write("#include \"StorageVolumes.h\" \n")
  outFile.write("\n")
  outFile.write("configuration VolumeMapC { \n")
  outFile.write("  provides { \n")
  outFile.write("    interface BlockRead[uint8_t volume_id]; \n")
  outFile.write("    interface BlockWrite[uint8_t volume_id]; \n")
  outFile.write("    interface LogRead[uint8_t volumeId]; \n")
  outFile.write("    interface LogWrite[uint8_t volumeId]; \n")
   outFile.write("    interface Mount[uint8_t volumeId]; \n")
   outFile.write("    interface ConfigStorage[uint8_t volumeId]; \n")
  outFile.write("  } \n")
  outFile.write("} \n")
  outFile.write("\n")
  outFile.write("implementation { \n")
  outFile.write("  components VolumeMapP; \n")
  outFile.write("\n")
  outFile.write("  BlockRead = VolumeMapP; \n")
  outFile.write("  BlockWrite = VolumeMapP; \n")
  outFile.write("  LogRead = VolumeMapP; \n")
  outFile.write("  LogWrite = VolumeMapP; \n")
  outFile.write("  Mount = VolumeMapP; \n")
  outFile.write("  ConfigStorage = VolumeMapP; \n")

  for i in range(len(volumeNames)):
    if volumeTypes[volumeNames[i]] == "block":
      outFile.write("\n")
      outFile.write("  components new BlockStorageC(" + volumeNames[i] + ") as BlockStorageC_" + volumeNames[i] + "; \n")
      outFile.write("  VolumeMapP.SubBlockRead[" + volumeNames[i] + "] -> BlockStorageC_" + volumeNames[i] + "; \n")
      outFile.write("  VolumeMapP.SubBlockWrite[" + volumeNames[i] + "] -> BlockStorageC_" + volumeNames[i] + "; \n")
      outFile.write("\n")
      
    elif volumeTypes[volumeNames[i]] == "log":
      outFile.write("\n")      
      outFile.write("  components new LogStorageC(" + volumeNames[i] + ", " + volumeOptions[volumeNames[i]] + ") as LogStorageC_" + volumeNames[i] + "; \n")
      outFile.write("  VolumeMapP.SubLogRead[" + volumeNames[i] + "] -> LogStorageC_" + volumeNames[i] + "; \n")
      outFile.write("  VolumeMapP.SubLogWrite[" + volumeNames[i] + "] -> LogStorageC_" + volumeNames[i] + "; \n")
      outFile.write("\n")

     elif volumeTypes[volumeNames[i]] == "config":
       outFile.write("  components new ConfigStorageC(" + volumeNames[i] + ") as ConfigStorageC_" + volumeNames[i] + "; \n")
       outFile.write("  Mount[" + volumeNames[i] + "] = ConfigStorageC_" + volumeNames[i] + "; \n")
       outFile.write("  ConfigStorage[" + volumeNames[i] + "] = ConfigStorageC_" + volumeNames[i] + "; \n")
  outFile.write("} \n")