mirror of
https://github.com/AsahiLinux/m1n1
synced 2024-12-04 03:49:10 +00:00
140 lines
3.6 KiB
Python
Executable file
140 lines
3.6 KiB
Python
Executable file
#!/usr/bin/env python3
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# SPDX-License-Identifier: MIT
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import sys, pathlib
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sys.path.append(str(pathlib.Path(__file__).resolve().parents[1]))
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import struct
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from construct import *
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from m1n1.setup import *
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from m1n1.shell import run_shell
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from m1n1.hw.dart import DART, DARTRegs
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from m1n1.fw.asc import StandardASC, ASCDummyEndpoint
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class ASCArgumentSection:
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def __init__(self, bytes_):
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self.blob = bytearray(bytes_)
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self.index = self.build_index()
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def build_index(self):
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off = 0
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fields = []
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while off < len(self.blob):
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snip = self.blob[off:]
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key = snip[0:4]
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length = int.from_bytes(snip[4:8], byteorder='little')
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fields.append((key.decode('ascii'), (off + 8, length)))
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off += 8 + length
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if off > len(self.blob):
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raise ValueError('blob overran during parsing')
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return dict(fields)
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def items(self):
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for key, span in self.index.items():
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off, length = span
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yield key, self.blob[off:off + length]
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def __getitem__(self, key):
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off, length = self.index[key]
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return bytes(self.blob[off:off + length])
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def __setitem__(self, key, value):
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off, length = self.index[key]
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if type(value) is int:
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value = int.to_bytes(value, length, byteorder='little')
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elif type(value) is str:
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value = value.encode('ascii')
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if len(value) > length:
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raise ValueError(f'field {key:s} overflown')
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self.blob[off:off + length] = value
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def update(self, keyvals):
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for key, val in keyvals.items():
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self[key] = val
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def keys(self):
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return self.index.keys()
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def dump(self):
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for key, val in self.items():
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print(f"{key:4s} = {val}")
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def dump_diff(self, other):
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assert self.index == other.index
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for key in self.keys():
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if self[key] != other[key]:
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print(f"Differs: {key:4s} = {self[key]} / {other[key]}")
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def to_bytes(self):
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return bytes(self.blob)
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class AOPClient(StandardASC):
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ENDPOINTS = {
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0x20: ASCDummyEndpoint,
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0x21: ASCDummyEndpoint,
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0x22: ASCDummyEndpoint,
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0x23: ASCDummyEndpoint,
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0x24: ASCDummyEndpoint,
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0x25: ASCDummyEndpoint,
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0x26: ASCDummyEndpoint,
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0x27: ASCDummyEndpoint,
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0x28: ASCDummyEndpoint
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}
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def __init__(self, u, adtpath, dart=None):
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node = u.adt[adtpath]
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self.base = node.get_reg(0)[0]
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self.fw_base, self.fw_len = node.get_reg(2)
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super().__init__(u, self.base, dart)
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def _bootargs_span(self):
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base = self.fw_base + self.p.read32(self.fw_base + 0x224)
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length = self.p.read32(self.fw_base + 0x228)
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return (base, length)
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def read_bootargs(self):
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blob = self.iface.readmem(*self._bootargs_span())
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return ASCArgumentSection(blob)
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def write_bootargs(self, args):
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base, _ = self._bootargs_span()
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self.iface.writemem(base, args.to_bytes())
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def update_bootargs(self, keyvals):
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args = self.read_bootargs()
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args.update(keyvals)
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self.write_bootargs(args)
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p.dapf_init_all()
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dart = DART.from_adt(u, "/arm-io/dart-aop")
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dart.initialize()
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dart.regs.TCR[0].set( BYPASS_DAPF=0, BYPASS_DART=0, TRANSLATE_ENABLE=1)
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dart.regs.TCR[15].set(BYPASS_DAPF=0, BYPASS_DART=1, TRANSLATE_ENABLE=0)
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aop = AOPClient(u, "/arm-io/aop", dart)
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aop.update_bootargs({
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'p0CE': 0x20000,
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# 'laCn': 0x0,
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# 'tPOA': 0x1,
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})
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aop.verbose = 4
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try:
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aop.boot()
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except KeyboardInterrupt:
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pass
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run_shell(locals())
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