vector-uefi/fd/tool/chipsec/hal/cmos.py
#!/usr/local/bin/python
#CHIPSEC: Platform Security Assessment Framework
#Copyright (c) 2010-2014, Intel Corporation
#
#This program is free software; you can redistribute it and/or
#modify it under the terms of the GNU General Public License
#as published by the Free Software Foundation; Version 2.
#
#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
#
#You should have received a copy of the GNU General Public License
#along with this program; if not, write to the Free Software
#Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
#Contact information:
#chipsec@intel.com
#
# -------------------------------------------------------------------------------
#
# CHIPSEC: Platform Hardware Security Assessment Framework
# (c) 2010-2012 Intel Corporation
#
# -------------------------------------------------------------------------------
#
#
## \addtogroup hal
# chipsec/hal/cmos.py
# ==================================
# CMOS memory specific functions (dump, read/write)
#~~~
# #usage:
# dump()
# read_byte( offset )
# write_byte( offset, value )
#~~~
#
__version__ = '1.0'
import struct
import sys
import time
from chipsec.hal.hal_base import HALBase
class CmosRuntimeError (RuntimeError):
pass
class CmosAccessError (RuntimeError):
pass
CMOS_ADDR_PORT_LOW = 0x70
CMOS_DATA_PORT_LOW = 0x71
CMOS_ADDR_PORT_HIGH = 0x72
CMOS_DATA_PORT_HIGH = 0x73
class CMOS(HALBase):
def read_cmos_high( self, offset ):
self.cs.io.write_port_byte( CMOS_ADDR_PORT_HIGH, offset );
return self.cs.io.read_port_byte( CMOS_DATA_PORT_HIGH )
def write_cmos_high( self, offset, value ):
self.cs.io.write_port_byte( CMOS_ADDR_PORT_HIGH, offset );
self.cs.io.write_port_byte( CMOS_DATA_PORT_HIGH, value );
def read_cmos_low( self, offset ):
self.cs.io.write_port_byte( CMOS_ADDR_PORT_LOW, 0x80|offset );
return self.cs.io.read_port_byte( CMOS_DATA_PORT_LOW )
def write_cmos_low( self, offset, value ):
self.cs.io.write_port_byte( CMOS_ADDR_PORT_LOW, offset );
self.cs.io.write_port_byte( CMOS_DATA_PORT_LOW, value );
def dump_low( self ):
orig = self.cs.io.read_port_byte( CMOS_ADDR_PORT_LOW );
self.logger.log( "Low CMOS contents:" )
self.logger.log( "....0...1...2...3...4...5...6...7...8...9...A...B...C...D...E...F" )
cmos_str = []
cmos_str += ["00.."]
for n in range(1, 129):
val = self.read_cmos_low( n-1 )
cmos_str += ["%02X " % val]
if ( (0 == n%16) and n < 125 ):
cmos_str += ["\n%0X.." % n]
self.cs.io.write_port_byte( CMOS_ADDR_PORT_LOW, orig );
self.logger.log( "".join(cmos_str) )
return
def dump_high( self ):
orig = self.cs.io.read_port_byte( CMOS_ADDR_PORT_HIGH );
self.logger.log( "High CMOS contents:" )
self.logger.log( "....0...1...2...3...4...5...6...7...8...9...A...B...C...D...E...F" )
cmos_str = []
cmos_str += ["00.."]
for n in range(1, 129):
val = self.read_cmos_high( n-1 )
cmos_str += ["%02X " % val]
if ( (0 == n%16) and n < 125 ):
cmos_str += ["\n%0X.." % n]
self.cs.io.write_port_byte( CMOS_ADDR_PORT_HIGH, orig );
self.logger.log( "".join(cmos_str) )
return
def dump( self ):
self.dump_low()
self.dump_high()