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      1 /*	$NetBSD: intr.c,v 1.3 2021/07/24 07:59:10 skrll Exp $	*/
      2 /*
      3  * Copyright (c) 2012 KIYOHARA Takashi
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     19  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     23  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     24  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     25  * POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.3 2021/07/24 07:59:10 skrll Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/systm.h>
     33 #include <sys/cpu.h>
     34 
     35 #include <arm/locore.h>
     36 
     37 #include <arm/pic/picvar.h>
     38 
     39 void epoc32_irq_handler(void *);
     40 
     41 int (*soc_find_pending_irqs)(void);
     42 
     43 void
     44 epoc32_irq_handler(void *frame)
     45 {
     46 	struct cpu_info * const ci = curcpu();
     47 	const int oldipl = ci->ci_cpl;
     48 	const uint32_t oldipl_mask = __BIT(oldipl);
     49 	int ipl_mask;
     50 
     51 	ci->ci_data.cpu_nintr++;
     52 
     53 	ipl_mask = soc_find_pending_irqs();
     54 
     55 	/*
     56 	 * Record the pending_ipls and deliver them if we can.
     57 	 */
     58 	if ((ipl_mask & ~oldipl_mask) > oldipl_mask)
     59 		pic_do_pending_ints(I32_bit, oldipl, frame);
     60 }
     61