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 2005, 2008 Develer S.r.l. (http://www.develer.com/)
32 * \brief Low-level timer module for Qt emulator (implementation).
35 * \author Bernie Innocenti <bernie@codewiz.org>
37 //#include <cfg/compiler.h> // hptime.t
38 #include <os/hptime.h>
39 #include <kern/irq.h> // irq_register()
42 #include <signal.h> // sigaction()
43 #include <string.h> // memset()
45 #include <sys/time.h> // setitimer()
48 // Forward declaration for the user interrupt server routine.
51 /// HW dependent timer initialization.
52 static void timer_hw_init(void)
55 irq_register(SIGALRM, (void (*)(void))timer_isr);
56 #else // ! CONFIG_KERN_IRQ
58 memset(&sa, 0, sizeof(sa));
60 // Setup interrupt callback
61 sa.sa_handler = timer_isr;
62 sigemptyset(&sa.sa_mask);
63 sigaddset(&sa.sa_mask, SIGALRM);
64 sa.sa_flags = SA_RESTART;
65 sigaction(SIGALRM, &sa, NULL);
66 #endif // CONFIG_KERN_IRQ
68 // Setup POSIX realtime timer to interrupt every 1/TIMER_TICKS_PER_SEC.
69 static const struct itimerval itv =
71 { 0, 1000000 / TIMER_TICKS_PER_SEC }, /* it_interval */
72 { 0, 1000000 / TIMER_TICKS_PER_SEC } /* it_value */
74 setitimer(ITIMER_REAL, &itv, NULL);
77 static void timer_hw_cleanup(void)
79 static const struct itimerval itv =
81 { 0, 0 }, /* it_interval */
82 { 0, 0 } /* it_value */
84 setitimer(ITIMER_REAL, &itv, NULL);
85 signal(SIGALRM, SIG_DFL);
88 INLINE hptime_t timer_hw_hpread(void)
93 #define timer_hw_triggered() (true)