source: rtems/bsps/riscv/riscv/btimer/btimer.c @ 8db3f0e

Last change on this file since 8db3f0e was 8db3f0e, checked in by Sebastian Huber <sebastian.huber@…>, on Jul 19, 2018 at 10:11:19 AM

riscv: Rework exception handling

Remove _CPU_ISR_install_raw_handler() and _CPU_ISR_install_vector()
functions. Applications can install an exception handler via the fatal
error handler to handle synchronous exceptions.

Handle interrupt exceptions via _RISCV_Interrupt_dispatch() which must
be provided by the BSP.

Update #3433.

  • Property mode set to 100644
File size: 2.4 KB
Line 
1/*
2 * Copyright (c) 2015 University of York.
3 * Hesham Almatary <hesham@alumni.york.ac.uk>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <rtems.h>
28#include <bsp.h>
29#include <rtems/btimer.h>
30#include <rtems/score/riscv-utility.h>
31
32bool benchmark_timer_find_average_overhead;
33
34static void benchmark_timer1_interrupt_handler(void)
35{
36}
37
38/* Start eCore tiemr 1 usef for profiling and timing analysis */
39void benchmark_timer_initialize( void )
40{
41  /* Install interrupt handler for timer 1 */
42}
43
44/*
45 *  The following controls the behavior of benchmark_timer_read().
46 *
47 *  AVG_OVEREHAD is the overhead for starting and stopping the timer.  It
48 *  is usually deducted from the number returned.
49 *
50 *  LEAST_VALID is the lowest number this routine should trust.  Numbers
51 *  below this are "noise" and zero is returned.
52 */
53
54#define AVG_OVERHEAD      0  /* It typically takes X.X microseconds */
55/* (Y countdowns) to start/stop the timer. */
56/* This value is in microseconds. */
57#define LEAST_VALID       1  /* Don't trust a clicks value lower than this */
58
59benchmark_timer_t benchmark_timer_read( void )
60{
61}
62
63void benchmark_timer_disable_subtracting_average_overhead(
64  bool find_flag
65)
66{
67  benchmark_timer_find_average_overhead = find_flag;
68}
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