mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Nathaniel Mitchell
87 lines
3.3 KiB
Python
87 lines
3.3 KiB
Python
# 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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>>> 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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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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def requires_driver(self):
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parser = ArgumentParser(prog='chipsec_util mmcfg', usage=__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.log_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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