jmr3904/irq/vectorisrs.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  *  @file
0005  *
0006  *  TX3904 Interrupt Vectoring
0007  */
0008
0009 /*
0010  *  COPYRIGHT (c) 1989-2012.
0011  *  On-Line Applications Research Corporation (OAR).
0012  *
0013  * Redistribution and use in source and binary forms, with or without
0014  * modification, are permitted provided that the following conditions
0015  * are met:
0016  * 1. Redistributions of source code must retain the above copyright
0017  *    notice, this list of conditions and the following disclaimer.
0018  * 2. Redistributions in binary form must reproduce the above copyright
0019  *    notice, this list of conditions and the following disclaimer in the
0020  *    documentation and/or other materials provided with the distribution.
0021  *
0022  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0023  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0024  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0025  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0026  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0027  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0028  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0029  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0030  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0031  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0032  * POSSIBILITY OF SUCH DAMAGE.
0033  */
0034
0035 #include <rtems.h>
0036 #include <stdlib.h>
0037 #include <bsp/irq.h>
0038 #include <rtems/bspIo.h>  /* for printk */
0039 #include <bsp/irq-generic.h>
0040 #include <libcpu/isr_entries.h>
0041
0042 void mips_vector_isr_handlers( CPU_Interrupt_frame *frame )
0043 {
0044   unsigned int sr;
0045   unsigned int cause;
0046
0047   mips_get_sr( sr );
0048   mips_get_cause( cause );
0049
0050   cause &= (sr & SR_IMASK);
0051   cause >>= CAUSE_IPSHIFT;
0052
0053   if ( cause & 0x80 )       /* IP[5] ==> INT0 */
0054     bsp_interrupt_handler_dispatch( TX3904_IRQ_INT0 );
0055
0056   if ( cause & 0x40 ) {     /* (IP[4] == 1) ==> IP[0-3] are valid */
0057     unsigned int v = (cause >> 2) & 0x0f;
0058     bsp_interrupt_handler_dispatch( MIPS_INTERRUPT_BASE + v );
0059   }
0060
0061   if ( cause & 0x02 )       /* SW[0] */
0062     bsp_interrupt_handler_dispatch( TX3904_IRQ_SOFTWARE_1 );
0063
0064   if ( cause & 0x01 )       /* IP[1] */
0065     bsp_interrupt_handler_dispatch( TX3904_IRQ_SOFTWARE_2 );
0066 }