mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Aaron Frinzell
138 lines
5.0 KiB
Python
138 lines
5.0 KiB
Python
#!/usr/bin/python
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#CHIPSEC: Platform Security Assessment Framework
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#Copyright (c) 2010-2021, Intel Corporation
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#
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#This program is free software; you can redistribute it and/or
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#modify it under the terms of the GNU General Public License
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#as published by the Free Software Foundation; Version 2.
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#
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#This program is distributed in the hope that it will be useful,
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#but WITHOUT ANY WARRANTY; without even the implied warranty of
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#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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#GNU General Public License for more details.
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#
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#You should have received a copy of the GNU General Public License
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#along with this program; if not, write to the Free Software
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#Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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#Contact information:
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#chipsec@intel.com
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#
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import time
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from chipsec.command import BaseCommand
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from chipsec.hal import smbus, spd
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from argparse import ArgumentParser
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class SPDCommand(BaseCommand):
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"""
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>>> chipsec_util spd detect
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>>> chipsec_util spd dump [device_addr]
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>>> chipsec_util spd read <device_addr> <offset>
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>>> chipsec_util spd write <device_addr> <offset> <byte_val>
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Examples:
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>>> chipsec_util spd detect
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>>> chipsec_util spd dump DIMM0
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>>> chipsec_util spd dump 0xA0
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>>> chipsec_util spd read DIMM2 0x0
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>>> chipsec_util spd read 0xA0 0x0
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>>> chipsec_util spd write 0xA0 0x0 0xAA
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"""
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def requires_driver(self):
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parser = ArgumentParser(usage=SPDCommand.__doc__)
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subparsers = parser.add_subparsers()
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parser_detect = subparsers.add_parser('detect')
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parser_detect.set_defaults(func=self.spd_detect)
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parser_dump = subparsers.add_parser('dump')
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parser_dump.add_argument('dev', type=str, nargs='?', default=None, help="Device")
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parser_dump.set_defaults(func=self.spd_dump)
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parser_read = subparsers.add_parser('read')
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parser_read.add_argument('dev', type=str, help="Device Address")
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parser_read.add_argument('off', type=lambda x: int(x, 16), nargs='?', default=None, help="Offset (hex)")
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parser_read.set_defaults(func=self.spd_read)
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parser_write = subparsers.add_parser('write')
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parser_write.add_argument('dev', type=str, help="Device Address")
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parser_write.add_argument('off', type=lambda x: int(x, 16), help="Offset (hex)")
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parser_write.add_argument('val', type=lambda x: int(x, 16), help="Byte Value (hex)")
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parser_write.set_defaults(func=self.spd_write)
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parser.parse_args(self.argv[2:], namespace=self)
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return True
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def spd_detect(self):
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self.logger.log( "[CHIPSEC] Searching for DIMMs with SPD..." )
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_dimms = self._spd.detect()
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if _dimms is not None:
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self.logger.log( "Detected the following SPD devices:" )
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for _dimm in _dimms: self.logger.log( "{}: 0x{:02X}".format(spd.SPD_DIMMS[_dimm], _dimm) )
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else:
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self.logger.log( "Unable to detect SPD devices." )
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def spd_dump(self):
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if self.dev is not None:
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_dev = self.dev.upper()
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self.dev_addr = spd.SPD_DIMM_ADDRESSES[ _dev ] if _dev in spd.SPD_DIMM_ADDRESSES else int(self.dev, 16)
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if not self._spd.isSPDPresent( self.dev_addr ):
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self.logger.log( "[CHIPSEC] SPD for DIMM 0x{:X} is not found".format(self.dev_addr) )
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return
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self._spd.decode( self.dev_addr )
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else:
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_dimms = self._spd.detect()
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for _dimm in _dimms: self._spd.decode( _dimm )
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def spd_read(self):
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_dev = self.dev.upper()
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self.dev_addr = spd.SPD_DIMM_ADDRESSES[ _dev ] if _dev in spd.SPD_DIMM_ADDRESSES else int(self.dev, 16)
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if not self._spd.isSPDPresent( self.dev_addr ):
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self.logger.log( "[CHIPSEC] SPD for DIMM 0x{:X} is not found".format(self.dev_addr) )
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return
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val = self._spd.read_byte( self.off, self.dev_addr )
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self.logger.log( "[CHIPSEC] SPD read: offset 0x{:X} = 0x{:X}".format(self.off, val) )
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def spd_write(self):
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_dev = self.dev.upper()
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self.dev_addr = spd.SPD_DIMM_ADDRESSES[ _dev ] if _dev in spd.SPD_DIMM_ADDRESSES else int(self.dev, 16)
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if not self._spd.isSPDPresent( self.dev_addr ):
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self.logger.log( "[CHIPSEC] SPD for DIMM 0x{:X} is not found".format(self.dev_addr) )
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return
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self.logger.log( "[CHIPSEC] SPD write: offset 0x{:X} = 0x{:X}".format(self.off, self.val) )
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self._spd.write_byte( self.off, self.val, self.dev_addr )
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def run(self):
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try:
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_smbus = smbus.SMBus( self.cs )
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self._spd = spd.SPD( _smbus )
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except BaseException as msg:
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self.logger.error(msg)
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return
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t = time.time()
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if not _smbus.is_SMBus_supported():
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self.logger.log( "[CHIPSEC] SMBus controller is not supported" )
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return
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self.dev_addr = spd.SPD_SMBUS_ADDRESS
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self.func()
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self.logger.log( "[CHIPSEC] (spd) time elapsed {:.3f}".format(time.time() -t) )
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commands = { 'spd': SPDCommand }
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