1# Copyright (c) 2015 Stephen Warren
2# Copyright (c) 2015-2016, NVIDIA CORPORATION. All rights reserved.
3#
4# SPDX-License-Identifier: GPL-2.0
5
6# Logic to interact with the sandbox port of U-Boot, running as a sub-process.
7
8import time
9from u_boot_spawn import Spawn
10from u_boot_console_base import ConsoleBase
11
12class ConsoleSandbox(ConsoleBase):
13    """Represents a connection to a sandbox U-Boot console, executed as a sub-
14    process."""
15
16    def __init__(self, log, config):
17        """Initialize a U-Boot console connection.
18
19        Args:
20            log: A multiplexed_log.Logfile instance.
21            config: A "configuration" object as defined in conftest.py.
22
23        Returns:
24            Nothing.
25        """
26
27        super(ConsoleSandbox, self).__init__(log, config, max_fifo_fill=1024)
28
29    def get_spawn(self):
30        """Connect to a fresh U-Boot instance.
31
32        A new sandbox process is created, so that U-Boot begins running from
33        scratch.
34
35        Args:
36            None.
37
38        Returns:
39            A u_boot_spawn.Spawn object that is attached to U-Boot.
40        """
41
42        bcfg = self.config.buildconfig
43        config_spl = bcfg.get('config_spl', 'n') == 'y'
44        fname = '/spl/u-boot-spl' if config_spl else '/u-boot'
45        print fname
46        cmd = []
47        if self.config.gdbserver:
48            cmd += ['gdbserver', self.config.gdbserver]
49        cmd += [
50            self.config.build_dir + fname,
51            '-v',
52            '-d',
53            self.config.dtb
54        ]
55        return Spawn(cmd, cwd=self.config.source_dir)
56
57    def kill(self, sig):
58        """Send a specific Unix signal to the sandbox process.
59
60        Args:
61            sig: The Unix signal to send to the process.
62
63        Returns:
64            Nothing.
65        """
66
67        self.log.action('kill %d' % sig)
68        self.p.kill(sig)
69
70    def validate_exited(self):
71        """Determine whether the sandbox process has exited.
72
73        If required, this function waits a reasonable time for the process to
74        exit.
75
76        Args:
77            None.
78
79        Returns:
80            Boolean indicating whether the process has exited.
81        """
82
83        p = self.p
84        self.p = None
85        for i in xrange(100):
86            ret = not p.isalive()
87            if ret:
88                break
89            time.sleep(0.1)
90        p.close()
91        return ret
92