mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Aaron Frinzell
88 lines
3.4 KiB
Python
88 lines
3.4 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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"""
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The mmcfg command allows direct access to memory mapped config space.
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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 mmio
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from argparse import ArgumentParser
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# Access to Memory Mapped PCIe Configuration Space (MMCFG)
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class MMCfgCommand(BaseCommand):
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"""
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>>> chipsec_util mmcfg <bus> <device> <function> <offset> <width> [value]
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Examples:
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>>> chipsec_util mmcfg 0 0 0 0x88 4
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>>> chipsec_util mmcfg 0 0 0 0x88 byte 0x1A
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>>> chipsec_util mmcfg 0 0x1F 0 0xDC 1 0x1
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>>> chipsec_util mmcfg 0 0 0 0x98 dword 0x004E0040
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"""
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def requires_driver(self):
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parser = ArgumentParser( prog='chipsec_util mmcfg', usage=MMCfgCommand.__doc__ )
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parser.add_argument('bus', type=lambda x: int(x,16), help='Bus (hex)')
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parser.add_argument('device', type=lambda x: int(x,16), help='Device (hex)')
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parser.add_argument('function', type=lambda x: int(x,16), help='Function (hex)')
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parser.add_argument('offset', type=lambda x: int(x,16), help='Offset (hex)')
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parser.add_argument('width', type=str, choices=['byte','word','dword','1','2','4'], help='Width [byte,word,dword] or (int)')
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parser.add_argument('value', type=lambda x: int(x,16), nargs='?', default=None, help='Value to write (hex)')
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parser.set_defaults()
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parser.parse_args(self.argv[2:], namespace=self)
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return True
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def run(self):
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t = time.time()
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_mmio = mmio.MMIO(self.cs)
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try:
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if self.width == 'byte':
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_width = 1
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elif self.width == 'word':
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_width = 2
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elif self.width == 'dword':
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_width = 4
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else:
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_width = int(self.width)
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except ValueError:
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self.logger.error( "ValueError: Invalid inputs." )
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return
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if self.value is not None:
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_mmio.write_mmcfg_reg(self.bus, self.device, self.function, self.offset, _width, self.value )
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self.logger.log( "[CHIPSEC] Writing MMCFG register ({:02d}:{:02d}.{:d} + 0x{:02X}): 0x{:X}".format(self.bus, self.device, self.function, self.offset, self.value) )
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else:
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data = _mmio.read_mmcfg_reg(self.bus, self.device, self.function, self.offset, _width )
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self.logger.log( "[CHIPSEC] Reading MMCFG register ({:02d}:{:02d}.{:d} + 0x{:02X}): 0x{:X}".format(self.bus, self.device, self.function, self.offset, data) )
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self.logger.log( '' )
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self.logger.log( "[CHIPSEC] (mmcfg) time elapsed {:.3f}".format(time.time() -t) )
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commands = { 'mmcfg': MMCfgCommand }
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