mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Nathaniel Mitchell
94 lines
3.2 KiB
Python
94 lines
3.2 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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#
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# CHIPSEC: Platform Hardware Security Assessment Framework
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#
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# -------------------------------------------------------------------------------
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"""
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CMOS memory specific functions (dump, read/write)
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usage:
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>>> cmos.dump_low()
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>>> cmos.dump_high()
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>>> cmos.dump()
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>>> cmos.read_cmos_low( offset )
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>>> cmos.write_cmos_low( offset, value )
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>>> cmos.read_cmos_high( offset )
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>>> cmos.write_cmos_high( offset, value )
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"""
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from typing import List
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from chipsec.hal import hal_base
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import chipsec.library.logger
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CMOS_ADDR_PORT_LOW = 0x70
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CMOS_DATA_PORT_LOW = 0x71
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CMOS_ADDR_PORT_HIGH = 0x72
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CMOS_DATA_PORT_HIGH = 0x73
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class CMOS(hal_base.HALBase):
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def __init__(self, cs):
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super(CMOS, self).__init__(cs)
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def read_cmos_high(self, offset: int) -> int:
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self.cs.hals.io.write(CMOS_ADDR_PORT_HIGH, offset, 1)
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return self.cs.hals.io.read(CMOS_DATA_PORT_HIGH, 1)
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def write_cmos_high(self, offset: int, value: int) -> None:
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self.cs.hals.io.write(CMOS_ADDR_PORT_HIGH, offset, 1)
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self.cs.hals.io.write(CMOS_DATA_PORT_HIGH, value, 1)
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def read_cmos_low(self, offset: int) -> int:
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self.cs.hals.io.write(CMOS_ADDR_PORT_LOW, 0x80 | offset, 1)
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return self.cs.hals.io.read(CMOS_DATA_PORT_LOW, 1)
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def write_cmos_low(self, offset: int, value: int) -> None:
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self.cs.hals.io.write(CMOS_ADDR_PORT_LOW, offset, 1)
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self.cs.hals.io.write(CMOS_DATA_PORT_LOW, value, 1)
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def dump_low(self) -> List[int]:
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cmos_buf = [0xFF] * 0x80
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orig = self.cs.hals.io.read(CMOS_ADDR_PORT_LOW, 1)
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for off in range(0x80):
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cmos_buf[off] = self.read_cmos_low(off)
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self.cs.hals.io.write(CMOS_ADDR_PORT_LOW, orig, 1)
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return cmos_buf
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def dump_high(self) -> List[int]:
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cmos_buf = [0xFF] * 0x80
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orig = self.cs.hals.io.read(CMOS_ADDR_PORT_HIGH, 1)
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for off in range(0x80):
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cmos_buf[off] = self.read_cmos_high(off)
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self.cs.hals.io.write(CMOS_ADDR_PORT_HIGH, orig, 1)
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return cmos_buf
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def dump(self) -> None:
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self.logger.log("Low CMOS memory contents:")
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chipsec.library.logger.pretty_print_hex_buffer(self.dump_low())
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self.logger.log("\nHigh CMOS memory contents:")
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chipsec.library.logger.pretty_print_hex_buffer(self.dump_high())
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haldata = {"arch":[hal_base.HALBase.MfgIds.Any], 'name': {'cmos': "CMOS"}}
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