mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Thiebaud Weksteen
119 lines
4.1 KiB
Python
119 lines
4.1 KiB
Python
#!/usr/local/bin/python
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#CHIPSEC: Platform Security Assessment Framework
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#Copyright (c) 2010-2015, 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 pci command can enumerate PCI devices and allow direct access to them by bus/device/function.
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"""
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__version__ = '1.0'
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import time
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from chipsec.command import BaseCommand
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from chipsec.hal.pci import *
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# PCIe Devices and Configuration Registers
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class PCICommand(BaseCommand):
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"""
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>>> chipsec_util pci enumerate
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>>> chipsec_util pci <bus> <device> <function> <offset> <width> [value]
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Examples:
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>>> chipsec_util pci enumerate
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>>> chipsec_util pci 0 0 0 0x88 4
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>>> chipsec_util pci 0 0 0 0x88 byte 0x1A
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>>> chipsec_util pci 0 0x1F 0 0xDC 1 0x1
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>>> chipsec_util pci 0 0 0 0x98 dword 0x004E0040
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"""
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def requires_driver(self):
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# No driver required when printing the util documentation
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if len(self.argv) < 3:
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return False
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return True
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def run(self):
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if len(self.argv) < 3:
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print PCICommand.__doc__
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return
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op = self.argv[2]
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t = time.time()
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if ( 'enumerate' == op ):
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self.logger.log( "[CHIPSEC] Enumerating available PCIe devices.." )
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print_pci_devices( self.cs.pci.enumerate_devices() )
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self.logger.log( "[CHIPSEC] (pci) time elapsed %.3f" % (time.time()-t) )
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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 PCICommand.__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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if 1 == width:
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self.cs.pci.write_byte( bus, device, function, offset, value )
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elif 2 == width:
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self.cs.pci.write_word( bus, device, function, offset, value )
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elif 4 == width:
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self.cs.pci.write_dword( bus, device, function, offset, value )
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else:
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print "ERROR: Unsupported width 0x%x" % width
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return
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self.logger.log( "[CHIPSEC] writing PCI %d/%d/%d, off 0x%02X: 0x%X" % (bus, device, function, offset, value) )
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else:
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if 1 == width:
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pci_value = self.cs.pci.read_byte(bus, device, function, offset)
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elif 2 == width:
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pci_value = self.cs.pci.read_word(bus, device, function, offset)
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elif 4 == width:
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pci_value = self.cs.pci.read_dword(bus, device, function, offset)
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else:
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print "ERROR: Unsupported width 0x%x" % width
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return
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self.logger.log( "[CHIPSEC] reading PCI B/D/F %d/%d/%d, off 0x%02X: 0x%X" % (bus, device, function, offset, pci_value) )
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self.logger.log( "[CHIPSEC] (pci) time elapsed %.3f" % (time.time()-t) )
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commands = { 'pci': PCICommand }
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