Home | History | Annotate | Line # | Download | only in pmax 
      1 /*	$NetBSD: interrupt.c,v 1.19 2011/07/09 17:32:30 matt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001, 2008 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: interrupt.c,v 1.19 2011/07/09 17:32:30 matt Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/device.h>
     37 #include <sys/cpu.h>
     38 #include <sys/intr.h>
     39 #include <sys/proc.h>
     40 
     41 #include <mips/locore.h>
     42 #include <mips/psl.h>
     43 #include <mips/regnum.h>
     44 
     45 #include <pmax/autoconf.h>
     46 #include <pmax/sysconf.h>
     47 
     48 struct evcnt pmax_clock_evcnt =
     49     EVCNT_INITIALIZER(EVCNT_TYPE_INTR, NULL, "clock", "intr");
     50 EVCNT_ATTACH_STATIC(pmax_clock_evcnt);
     51 #ifndef NOFPU
     52 struct evcnt pmax_fpu_evcnt =
     53     EVCNT_INITIALIZER(EVCNT_TYPE_INTR, NULL, "fpu", "intr");
     54 EVCNT_ATTACH_STATIC(pmax_fpu_evcnt);
     55 #endif
     56 struct evcnt pmax_memerr_evcnt =
     57     EVCNT_INITIALIZER(EVCNT_TYPE_INTR, NULL, "memerr", "intr");
     58 EVCNT_ATTACH_STATIC(pmax_memerr_evcnt);
     59 
     60 static const char * const intrnames[] = {
     61 	"serial0",
     62 	"serial1",
     63 	"ether",
     64 	"scsi",
     65 	"optslot0",
     66 	"optslot1",
     67 	"optslot2",
     68 	"dtop",
     69 	"isdn",
     70 	"floppy"
     71 };
     72 
     73 void
     74 intr_init(void)
     75 {
     76 	int i;
     77 
     78 	for (i = 0; i < MAX_DEV_NCOOKIES; i++)
     79 		evcnt_attach_dynamic(&intrtab[i].ih_count, EVCNT_TYPE_INTR,
     80 		    NULL, "pmax", intrnames[i]);
     81 }
     82 
     83 /*
     84  * pmax uses standard mips1 convention, wiring FPU to hard interrupt 5.
     85  */
     86 void
     87 cpu_intr(int ppl, vaddr_t pc, uint32_t status)
     88 {
     89 	int ipl;
     90 	uint32_t pending;
     91 
     92 	curcpu()->ci_data.cpu_nintr++;
     93 
     94 	while (ppl < (ipl = splintr(&pending))) {
     95 		/* device interrupts */
     96 		if (pending & (MIPS_INT_MASK_0|MIPS_INT_MASK_1|MIPS_INT_MASK_2|
     97 				MIPS_INT_MASK_3|MIPS_INT_MASK_4)) {
     98 			(*platform.iointr)(status, pc, pending);
     99 		}
    100 #if !defined(NOFPU)
    101 		/* FPU notification */
    102 		if (pending & MIPS_INT_MASK_5) {
    103 			if (!USERMODE(status))
    104 				panic("kernel used FPU: "
    105 				    "PC %#"PRIxVADDR", SR %#x", pc, status);
    106 
    107 			pmax_fpu_evcnt.ev_count++;
    108 			mips_fpu_intr(pc, curlwp->l_md.md_utf);
    109 		}
    110 #endif
    111 	}
    112 }
    113