mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Nathaniel Mitchell
72 lines
2.5 KiB
Python
72 lines
2.5 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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Access to physical memory
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usage:
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>>> read_physical_mem( 0xf0000, 0x100 )
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>>> write_physical_mem( 0xf0000, 0x100, buffer )
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>>> write_physical_mem_dowrd( 0xf0000, 0xdeadbeef )
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>>> read_physical_mem_dowrd( 0xfed40000 )
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"""
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from struct import unpack, pack
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from typing import Any, Dict, Tuple, Optional
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from chipsec.hal.hal_base import HALBase
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from chipsec.library.logger import print_buffer_bytes
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from chipsec.library.bits import make_mask
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class MemRange(HALBase):
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def __init__(self, cs):
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super(MemRange, self).__init__(cs)
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self.helper = cs.helper
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####################################################################################
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#
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# Physical memory API using 64b Physical Address
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# (Same functions as below just using 64b PA instead of High and Low 32b parts of PA)
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#
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####################################################################################
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# Reading physical memory
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def read(self, phys_address: int, length: int) -> bytes:
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self.logger.log_hal(f'[mem] 0x{phys_address:016X}')
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return self.helper.read_phys_mem(phys_address, length)
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def write(self, phys_address: int, length: int, buf: bytes) -> int:
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if self.logger.HAL:
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self.logger.log(f'[mem] buffer len = 0x{length:X} to PA = 0x{phys_address:016X}')
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print_buffer_bytes(buf)
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return self.helper.write_phys_mem(phys_address, length, buf)
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def get_def(self, range_name: str) -> Dict[str, Any]:
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'''Return address access of a MEM register'''
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ranges = self.cs.Cfg.get_objlist(range_name)
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if ranges:
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return ranges[0]
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return None
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haldata = {"arch":[HALBase.MfgIds.Any], 'name': {'memrange': "MemRange"}}
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