mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
BrentHoltsclaw
96 lines
3.2 KiB
Python
96 lines
3.2 KiB
Python
#!/usr/bin/python
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#CHIPSEC: Platform Security Assessment Framework
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#Copyright (c) 2010-2019, 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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# 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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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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if 2 == len(self.argv):
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pciexbar, pciexbar_sz = _mmio.get_MMCFG_base_address()
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self.logger.log( "[CHIPSEC] Memory Mapped Config Base: 0x{:016X}".format(pciexbar) )
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if self.logger.VERBOSE: self.logger.log("[CHIPSEC] Memory Mapped Config Size: {:016X}".format(pciexbar_sz))
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return
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elif 6 > len(self.argv):
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print (MMCfgCommand.__doc__)
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return
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try:
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bus = int(self.argv[2],16)
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device = int(self.argv[3],16)
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function = int(self.argv[4],16)
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offset = int(self.argv[5],16)
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if 6 == len(self.argv):
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width = 1
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else:
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if 'byte' == self.argv[6]:
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width = 1
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elif 'word' == self.argv[6]:
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width = 2
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elif 'dword' == self.argv[6]:
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width = 4
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else:
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width = int(self.argv[6])
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except Exception as e :
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print (MMCfgCommand.__doc__)
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return
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if 8 == len(self.argv):
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value = int(self.argv[7], 16)
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_mmio.write_mmcfg_reg(bus, device, function, offset, width, value )
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self.logger.log( "[CHIPSEC] writing MMCFG register ({:02d}:{:02d}.{:d} + 0x{:02X}): 0x{:X}".format(bus, device, function, offset, value) )
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else:
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value = _mmio.read_mmcfg_reg(bus, device, function, offset, width )
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self.logger.log( "[CHIPSEC] reading MMCFG register ({:02d}:{:02d}.{:d} + 0x{:02X}): 0x{:X}".format(bus, device, function, offset, value) )
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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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