shared/start/setvec.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  *  This routine installs an interrupt vector on CPU architectures
0005  *  using the Simple Vectored Interrupt Model.  This is the shared
0006  *  version which does nothing BSP specific.  A BSP specific version
0007  *  will be needed if you need to enable an interrupt source via
0008  *  some register.
0009  *
0010  *  INPUT PARAMETERS:
0011  *    handler - interrupt handler entry point
0012  *    vector  - vector number
0013  *    type    - 0 indicates raw hardware connect
0014  *              1 indicates RTEMS interrupt connect
0015  *
0016  *  OUTPUT PARAMETERS:  NONE
0017  *
0018  *  RETURNS:
0019  *    address of previous interrupt handler
0020  *
0021  *  COPYRIGHT (c) 1989-2009.
0022  *  On-Line Applications Research Corporation (OAR).
0023  *
0024  * Redistribution and use in source and binary forms, with or without
0025  * modification, are permitted provided that the following conditions
0026  * are met:
0027  * 1. Redistributions of source code must retain the above copyright
0028  *    notice, this list of conditions and the following disclaimer.
0029  * 2. Redistributions in binary form must reproduce the above copyright
0030  *    notice, this list of conditions and the following disclaimer in the
0031  *    documentation and/or other materials provided with the distribution.
0032  *
0033  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0034  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0035  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0036  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0037  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0038  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0039  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0040  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0041  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0042  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0043  * POSSIBILITY OF SUCH DAMAGE.
0044  */
0045
0046 #include <bsp.h>
0047
0048 rtems_isr_entry set_vector(                   /* returns old vector */
0049   rtems_isr_entry     handler,                /* isr routine        */
0050   rtems_vector_number vector,                 /* vector number      */
0051   int                 type                    /* RTEMS or RAW intr  */
0052 )
0053 {
0054   rtems_isr_entry previous_isr;
0055
0056   if ( type )
0057     rtems_interrupt_catch( handler, vector, &previous_isr );
0058   else
0059     _CPU_ISR_install_raw_handler( vector, handler, (void *)&previous_isr );
0060
0061   return previous_isr;
0062 }