flipperzero-firmware/debug/PyCortexMDebug/cmdebug/dwt_gdb.py
あく e348990fc6
Debug: Add PyCortexDebug. Core and peripheral register database and decoder. (#251)
* Debug: pycortexdebug
* Debug: format PyCortexMDebug source code
2020-11-19 18:48:34 +03:00

153 lines
4.9 KiB
Python

#!/usr/bin/env python
"""
This file is part of PyCortexMDebug
PyCortexMDebug is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
PyCortexMDebug is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PyCortexMDebug. If not, see <http://www.gnu.org/licenses/>.
"""
import gdb
import struct
DWT_CTRL = 0xE0001000
DWT_CYCCNT = 0xE0001004
DWT_CPICNT = 0xE0001008
DWT_EXTCNT = 0xE000100C
DWT_SLEEPCNT = 0xE0001010
DWT_LSUCNT = 0xE0001014
DWT_FOLDCNT = 0xE0001018
DWT_PCSR = 0xE000101C
prefix = "dwt : "
class DWT(gdb.Command):
clk = None
is_init = False
def __init__(self):
gdb.Command.__init__(self, "dwt", gdb.COMMAND_DATA)
def read(self, address, bits=32):
"""Read from memory (using print) and return an integer"""
value = gdb.selected_inferior().read_memory(address, bits / 8)
return struct.unpack_from("<i", value)[0]
def write(self, address, value, bits=32):
"""Set a value in memory"""
gdb.selected_inferior().write_memory(address, bytes(value), bits / 8)
def invoke(self, args, from_tty):
if not self.is_init:
self.write(0xE000EDFC, self.read(0xE000EDFC) | (1 << 24))
self.write(DWT_CTRL, 0)
self.is_init = True
s = map(lambda x: x.lower(), str(args).split(" "))
# Check for empty command
if s[0] in ["", "help"]:
self.print_help()
return ()
if s[0] == "cyccnt":
if len(s) > 1:
if s[1][:2] == "en":
self.cyccnt_en()
elif s[1][0] == "r":
self.cyccnt_reset()
elif s[1][0] == "d":
self.cyccnt_dis()
gdb.write(
prefix
+ "CYCCNT ({}): ".format("ON" if (self.read(DWT_CTRL) & 1) else "OFF")
+ self.cycles_str(self.read(DWT_CYCCNT))
)
elif s[0] == "reset":
if len(s) > 1:
if s[1] == "cyccnt":
self.cyccnt_reset()
gdb.write(prefix + "CYCCNT reset\n")
if s[1] == "counters":
self.cyccnt_reset()
gdb.write(prefix + "CYCCNT reset\n")
else:
self.cyccnt_reset()
gdb.write(prefix + "CYCCNT reset\n")
else:
# Reset everything
self.cyccnt_reset()
gdb.write(prefix + "CYCCNT reset\n")
elif s[0] == "configclk":
if len(s) == 2:
try:
self.clk = float(s[1])
except:
self.print_help()
else:
self.print_help()
else:
# Try to figure out what stupid went on here
gdb.write(args)
self.print_help()
def complete(self, text, word):
text = str(text).lower()
s = text.split(" ")
commands = ["configclk", "reset", "cyccnt"]
reset_commands = ["counters", "cyccnt"]
cyccnt_commands = ["enable", "reset", "disable"]
if len(s) == 1:
return filter(lambda x: x.startswith(s[0]), commands)
if len(s) == 2:
if s[0] == "reset":
return filter(lambda x: x.startswith(s[1]), reset_commands)
if s[0] == "cyccnt":
return filter(lambda x: x.startswith(s[1]), cyccnt_commands)
def cycles_str(self, cycles):
if self.clk:
return "%d cycles, %.3es\n" % (cycles, cycles * 1.0 / self.clk)
else:
return "%d cycles"
def cyccnt_en(self):
self.write(DWT_CTRL, self.read(DWT_CTRL) | 1)
def cyccnt_dis(self):
self.write(DWT_CTRL, self.read(DWT_CTRL) & 0xFFFFFFFE)
def cyccnt_reset(self, value=0):
self.write(DWT_CYCCNT, value)
def cpicnt_reset(self, value=0):
self.write(DWT_CPICNT, value & 0xFF)
def print_help(self):
gdb.write("Usage:\n")
gdb.write("=========\n")
gdb.write("dwt:\n")
gdb.write("\tList available peripherals\n")
gdb.write("dwt configclk [Hz]:\n")
gdb.write("\tSet clock for rendering time values in seconds\n")
gdb.write("dwt reset:\n")
gdb.write("\tReset everything in DWT\n")
gdb.write("dwt reset counters:\n")
gdb.write("\tReset all DWT counters\n")
gdb.write("dwt cyccnt\n")
gdb.write("\tDisplay the cycle count\n")
gdb.write("\td(default):decimal, x: hex, o: octal, b: binary\n")
return ()