mirror of
https://github.com/AsahiLinux/m1n1
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108 lines
3.7 KiB
Python
108 lines
3.7 KiB
Python
# SPDX-License-Identifier: MIT
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import struct
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from enum import IntEnum
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from m1n1.proxyutils import RegMonitor
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from m1n1.utils import *
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from m1n1.trace.dart import DARTTracer
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from m1n1.trace.asc import ASCTracer, EP, EPState, msg, msg_log, DIR
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from m1n1.fw.smc import *
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ASCTracer = ASCTracer._reloadcls()
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class SMCEpTracer(EP):
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BASE_MESSAGE = SMCMessage
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def __init__(self, tracer, epid):
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super().__init__(tracer, epid)
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self.state.sram_addr = None
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self.state.verbose = 1
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self.state.rb = {}
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Initialize = msg_log(SMC_INITIALIZE, DIR.TX, SMCInitialize)
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Notification = msg_log(SMC_NOTIFICATION, DIR.RX)
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@msg(SMC_WRITE_KEY, DIR.TX, SMCWriteKey)
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def WriteKey(self, msg):
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key = msg.KEY.to_bytes(4, byteorder="big").decode("ascii")
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self.state.rb[msg.ID] = msg.TYPE, key, msg.SIZE
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data = self.hv.iface.readmem(self.state.sram_addr, msg.SIZE)
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self.log(f"[{msg.ID:x}] >W: <{key}> = {data.hex()} ({msg.SIZE})")
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return True
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@msg(SMC_READ_KEY, DIR.TX, SMCReadKey)
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def ReadKey(self, msg):
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key = msg.KEY.to_bytes(4, byteorder="big").decode("ascii")
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self.state.rb[msg.ID] = msg.TYPE, key, msg.SIZE
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self.log(f"[{msg.ID:x}] >R: <{key}> = ... ({msg.SIZE})")
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return True
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@msg(SMC_RW_KEY, DIR.TX, SMCReadWriteKey)
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def ReadKeyPayload(self, msg):
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key = msg.KEY.to_bytes(4, byteorder="big").decode("ascii")
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self.state.rb[msg.ID] = msg.TYPE, key, msg.RSIZE
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data = self.hv.iface.readmem(self.state.sram_addr, msg.WSIZE)
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self.log(f"[{msg.ID:x}] >RP: <{key}> = {data.hex()} ({msg.WSIZE, msg.RSIZE})")
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return True
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@msg(SMC_GET_KEY_INFO, DIR.TX, SMCGetKeyInfo)
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def GetInfo(self, msg):
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key = msg.KEY.to_bytes(4, byteorder="big").decode("ascii")
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self.state.rb[msg.ID] = msg.TYPE, key, None
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self.log(f"[{msg.ID:x}] >KInfo: <{key}>")
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return True
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@msg(SMC_GET_KEY_BY_INDEX, DIR.TX, SMCGetKeyByIndex)
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def GetKeyByIndex(self, msg):
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self.state.rb[msg.ID] = msg.TYPE, msg.INDEX, None
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self.log(f"[{msg.ID:x}] >KIdx: <{msg.INDEX}>")
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return True
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@msg(None, DIR.RX, Register64)
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def RXMsg(self, msg):
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if self.state.sram_addr is None:
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self.log(f"SRAM address: {msg.value:#x}")
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self.state.sram_addr = msg.value
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return True
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msg = SMCResult(msg.value)
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if msg.RESULT != 0:
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self.log(f"[{msg.ID:x}] <Err: 0x{msg.RESULT:02x}")
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return True
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if msg.ID in self.state.rb:
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msgtype, key, size = self.state.rb.pop(msg.ID)
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if msgtype in (SMC_READ_KEY, SMC_RW_KEY):
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if size <= 4:
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data = hex(msg.VALUE)
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else:
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data = self.hv.iface.readmem(self.state.sram_addr, msg.SIZE).hex()
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self.log(f"[{msg.ID:x}] <R: <{key}> = {data}")
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return True
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elif msgtype == SMC_GET_KEY_INFO:
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data = self.hv.iface.readmem(self.state.sram_addr, 6)
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size, type, flags = struct.unpack("B4sB", data)
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self.log(f"[{msg.ID:x}] <Info: <{key}>: size={size} type={type.decode('ascii')} flags={flags:#x}")
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return True
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elif msgtype == SMC_GET_KEY_BY_INDEX:
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kname = msg.VALUE.to_bytes(4, byteorder="little").decode("ascii")
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self.log(f"[{msg.ID:x}] <Key @{key}: <{kname}>")
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return True
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self.log(f"[{msg.ID:x}] <OK {msg!r}")
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return True
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class SMCTracer(ASCTracer):
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ENDPOINTS = {
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0x20: SMCEpTracer
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}
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def handle_msg(self, direction, r0, r1):
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super().handle_msg(direction, r0, r1)
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smc_tracer = SMCTracer(hv, "/arm-io/smc", verbose=1)
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smc_tracer.start()
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