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Sometimes we know that the board is already running the right software, so provide an option to allow running of tests directly, without first resetting the board. This saves time when re-running a test where only the Python code is changing. Note that this feature is open to errors, since the user must know that the board is in a fit state to execute tests. It is useful for repeated iteration on a particular test, where it can save quite a bit of time. Signed-off-by: Simon Glass <sjg@chromium.org>
85 lines
2.8 KiB
Python
85 lines
2.8 KiB
Python
# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2015 Stephen Warren
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# Copyright (c) 2015-2016, NVIDIA CORPORATION. All rights reserved.
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"""
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Logic to interact with U-Boot running on real hardware, typically via a
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physical serial port.
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"""
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import sys
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from u_boot_spawn import Spawn
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from u_boot_console_base import ConsoleBase
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class ConsoleExecAttach(ConsoleBase):
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"""Represents a physical connection to a U-Boot console, typically via a
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serial port. This implementation executes a sub-process to attach to the
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console, expecting that the stdin/out of the sub-process will be forwarded
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to/from the physical hardware. This approach isolates the test infra-
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structure from the user-/installation-specific details of how to
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communicate with, and the identity of, serial ports etc."""
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def __init__(self, log, config):
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"""Initialize a U-Boot console connection.
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Args:
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log: A multiplexed_log.Logfile instance.
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config: A "configuration" object as defined in conftest.py.
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Returns:
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Nothing.
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"""
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# The max_fifo_fill value might need tweaking per-board/-SoC?
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# 1 would be safe anywhere, but is very slow (a pexpect issue?).
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# 16 is a common FIFO size.
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# HW flow control would mean this could be infinite.
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super(ConsoleExecAttach, self).__init__(log, config, max_fifo_fill=16)
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with self.log.section('flash'):
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self.log.action('Flashing U-Boot')
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cmd = ['u-boot-test-flash', config.board_type, config.board_identity]
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runner = self.log.get_runner(cmd[0], sys.stdout)
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runner.run(cmd)
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runner.close()
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self.log.status_pass('OK')
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def get_spawn(self):
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"""Connect to a fresh U-Boot instance.
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The target board is reset, so that U-Boot begins running from scratch.
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Args:
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None.
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Returns:
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A u_boot_spawn.Spawn object that is attached to U-Boot.
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"""
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args = [self.config.board_type, self.config.board_identity]
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s = Spawn(['u-boot-test-console'] + args)
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if self.config.use_running_system:
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self.log.action('Connecting to board without reset')
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else:
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try:
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self.log.action('Resetting board')
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cmd = ['u-boot-test-reset'] + args
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runner = self.log.get_runner(cmd[0], sys.stdout)
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runner.run(cmd)
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runner.close()
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except:
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s.close()
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raise
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return s
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def close(self):
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super().close()
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self.log.action('Releasing board')
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args = [self.config.board_type, self.config.board_identity]
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cmd = ['u-boot-test-release'] + args
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runner = self.log.get_runner(cmd[0], sys.stdout)
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runner.run(cmd)
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runner.close()
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