mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
Dan Scott
83 lines
3.3 KiB
Python
83 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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>>> chipsec_util smbus read <device_addr> <start_offset> [size]
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>>> chipsec_util smbus write <device_addr> <offset> <byte_val>
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Examples:
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>>> chipsec_util smbus read 0xA0 0x0 0x100
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"""
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from chipsec.command import BaseCommand, toLoad
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from chipsec.library.logger import print_buffer_bytes
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from chipsec.hal.smbus import SMBus
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from argparse import ArgumentParser
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class SMBusCommand(BaseCommand):
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def requirements(self) -> toLoad:
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return toLoad.All
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def parse_arguments(self) -> None:
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parser = ArgumentParser(prog='chipsec_util smbus', usage=__doc__)
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subparsers = parser.add_subparsers()
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parser_read = subparsers.add_parser('read')
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parser_read.add_argument('dev_addr', type=lambda x: int(x, 16), help='Start Address (hex)')
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parser_read.add_argument('start_off', type=lambda x: int(x, 16), help='Start Offset (hex)')
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parser_read.add_argument('size', type=lambda x: int(x, 16), default=None, nargs='?', help='Size [Default=Byte] (hex)')
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parser_read.set_defaults(func=self.smbus_read)
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parser_write = subparsers.add_parser('write')
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parser_write.add_argument('dev_addr', type=lambda x: int(x, 16), help='Start Address (hex)')
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parser_write.add_argument('off', type=lambda x: int(x, 16), help='Start Offset (hex)')
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parser_write.add_argument('val', type=lambda x: int(x, 16), help='Byte Value (hex)')
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parser_write.set_defaults(func=self.smbus_write)
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parser.parse_args(self.argv, namespace=self)
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def set_up(self) -> None:
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self._smbus = SMBus(self.cs)
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def smbus_read(self):
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if self.size is not None:
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buf = self._smbus.read_range(self.dev_addr, self.start_off, self.size)
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self.logger.log("[CHIPSEC] SMBus read: device 0x{:X} offset 0x{:X} size 0x{:X}".format(self.dev_addr, self.start_off, self.size))
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print_buffer_bytes(buf)
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else:
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val = self._smbus.read_byte(self.dev_addr, self.start_off)
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self.logger.log("[CHIPSEC] SMBus read: device 0x{:X} offset 0x{:X} = 0x{:X}".format(self.dev_addr, self.start_off, val))
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def smbus_write(self):
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self.logger.log("[CHIPSEC] SMBus write: device 0x{:X} offset 0x{:X} = 0x{:X}".format(self.dev_addr, self.off, self.val))
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self._smbus.write_byte(self.dev_addr, self.off, self.val)
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def run(self):
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if not self._smbus.is_SMBus_supported():
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self.logger.log("[CHIPSEC] SMBus controller is not supported")
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return
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self._smbus.display_SMBus_info()
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self.func()
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commands = {'smbus': SMBusCommand}
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