Home | History | Annotate | Line # | Download | only in sun3 
      1 /*	$NetBSD: intreg.c,v 1.30 2013/09/07 15:56:11 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Adam Glass and Gordon W. Ross.
      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 /*
     33  * This handles multiple attach of autovectored interrupts,
     34  * and the handy software interrupt request register.
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 __KERNEL_RCSID(0, "$NetBSD: intreg.c,v 1.30 2013/09/07 15:56:11 tsutsui Exp $");
     39 
     40 #include <sys/param.h>
     41 #include <sys/systm.h>
     42 #include <sys/device.h>
     43 #include <sys/vmmeter.h>
     44 
     45 #include <uvm/uvm_extern.h>
     46 
     47 #include <m68k/asm_single.h>
     48 
     49 #include <machine/autoconf.h>
     50 #include <machine/cpu.h>
     51 #include <machine/mon.h>
     52 
     53 #include <sun3/sun3/interreg.h>
     54 #include <sun3/sun3/machdep.h>
     55 
     56 struct intreg_softc {
     57 	device_t sc_dev;
     58 	volatile uint8_t *sc_reg;
     59 };
     60 
     61 static int  intreg_match(device_t, cfdata_t, void *);
     62 static void intreg_attach(device_t, device_t, void *);
     63 
     64 CFATTACH_DECL_NEW(intreg, sizeof(struct intreg_softc),
     65     intreg_match, intreg_attach, NULL, NULL);
     66 
     67 volatile uint8_t *interrupt_reg;
     68 static int intreg_attached;
     69 
     70 /* called early (by internal_configure) */
     71 void
     72 intreg_init(void)
     73 {
     74 	vaddr_t va;
     75 
     76 	if (find_prom_map(IREG_ADDR, PMAP_OBIO, 1, &va) != 0) {
     77 		mon_printf("intreg_init\n");
     78 		sunmon_abort();
     79 	}
     80 	interrupt_reg = (void *)va;
     81 
     82 	/* Turn off all interrupts until clock_attach */
     83 	*interrupt_reg = 0;
     84 }
     85 
     86 
     87 static int
     88 intreg_match(device_t parent, cfdata_t cf, void *args)
     89 {
     90 	struct confargs *ca = args;
     91 
     92 	/* This driver only supports one instance. */
     93 	if (intreg_attached)
     94 		return 0;
     95 
     96 	/* Validate the given address. */
     97 	if (ca->ca_paddr != IREG_ADDR)
     98 		return 0;
     99 
    100 	return 1;
    101 }
    102 
    103 
    104 static void
    105 intreg_attach(device_t parent, device_t self, void *args)
    106 {
    107 	struct intreg_softc *sc = device_private(self);
    108 
    109 	sc->sc_dev = self;
    110 	aprint_normal("\n");
    111 
    112 	sc->sc_reg = interrupt_reg;
    113 
    114 	intreg_attached = 1;
    115 }
    116 
    117 
    118 #if 0
    119 void
    120 isr_soft_request(int level)
    121 {
    122 	uint8_t bit;
    123 
    124 	if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX))
    125 		return;
    126 
    127 	bit = 1 << level;
    128 	single_inst_bset_b(*interrupt_reg, bit);
    129 }
    130 
    131 void
    132 isr_soft_clear(int level)
    133 {
    134 	uint8_t bit;
    135 
    136 	if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX))
    137 		return;
    138 
    139 	bit = 1 << level;
    140 	single_inst_bclr_b(*interrupt_reg, bit);
    141 }
    142 #endif
    143