1 /* $NetBSD: intreg.c,v 1.27 2007/12/04 15:12:07 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * This handles multiple attach of autovectored interrupts, 41 * and the handy software interrupt request register. 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: intreg.c,v 1.27 2007/12/04 15:12:07 tsutsui Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/device.h> 50 #include <sys/vmmeter.h> 51 52 #include <uvm/uvm_extern.h> 53 54 #include <m68k/asm_single.h> 55 56 #include <machine/autoconf.h> 57 #include <machine/cpu.h> 58 #include <machine/mon.h> 59 60 #include <sun3/sun3/interreg.h> 61 #include <sun3/sun3/machdep.h> 62 63 struct intreg_softc { 64 struct device sc_dev; 65 volatile u_char *sc_reg; 66 }; 67 68 static int intreg_match(struct device *, struct cfdata *, void *); 69 static void intreg_attach(struct device *, struct device *, void *); 70 71 CFATTACH_DECL(intreg, sizeof(struct intreg_softc), 72 intreg_match, intreg_attach, NULL, NULL); 73 74 volatile u_char *interrupt_reg; 75 int intreg_attached; 76 77 /* called early (by internal_configure) */ 78 void 79 intreg_init(void) 80 { 81 vaddr_t va; 82 83 if (find_prom_map(IREG_ADDR, PMAP_OBIO, 1, &va) != 0) { 84 mon_printf("intreg_init\n"); 85 sunmon_abort(); 86 } 87 interrupt_reg = (void *)va; 88 89 /* Turn off all interrupts until clock_attach */ 90 *interrupt_reg = 0; 91 } 92 93 94 static int 95 intreg_match(struct device *parent, struct cfdata *cf, void *args) 96 { 97 struct confargs *ca = args; 98 99 /* This driver only supports one instance. */ 100 if (intreg_attached) 101 return (0); 102 103 /* Validate the given address. */ 104 if (ca->ca_paddr != IREG_ADDR) 105 return (0); 106 107 return (1); 108 } 109 110 111 static void 112 intreg_attach(struct device *parent, struct device *self, void *args) 113 { 114 struct intreg_softc *sc = (void *)self; 115 116 printf("\n"); 117 118 sc->sc_reg = interrupt_reg; 119 120 intreg_attached = 1; 121 } 122 123 124 #if 0 125 void 126 isr_soft_request(int level) 127 { 128 u_char bit; 129 130 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 131 return; 132 133 bit = 1 << level; 134 single_inst_bset_b(*interrupt_reg, bit); 135 } 136 137 void 138 isr_soft_clear(int level) 139 { 140 u_char bit; 141 142 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 143 return; 144 145 bit = 1 << level; 146 single_inst_bclr_b(*interrupt_reg, bit); 147 } 148 #endif 149