4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2008 Bernie Innocenti <bernie@codewiz.org>
32 * \brief Idle loop for preemptive scheduling
34 * \version $Id: proc.c 1616 2008-08-10 19:41:26Z bernie $
35 * \author Bernie Innocenti <bernie@codewiz.org>
40 #include <cfg/module.h>
43 static cpustack_t idle_stack[CONFIG_PROC_DEFSTACKSIZE / sizeof(cpustack_t)];
48 * This process never dies and never sleeps. It's also quite lazy, apathic
49 * and sometimes even a little antisocial.
51 * Having an idle process costs us some stack space, but simplifies the
52 * interrupt-driven preemption logic because there is always a user
53 * context to which we can return.
55 * The idle process is not required for cooperative task switching.
57 static NORETURN void idle(void)
63 proc_yield(); // FIXME: CPU_IDLE
69 proc_new(idle, NULL, sizeof(idle_stack), idle_stack);