1 /* $NetBSD: hd6446xintc.c,v 1.7 2006/07/22 02:13:06 uwe Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 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 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: hd6446xintc.c,v 1.7 2006/07/22 02:13:06 uwe Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 45 #include <sh3/devreg.h> 46 #include <hpcsh/dev/hd6446x/hd6446xintcreg.h> 47 #include <hpcsh/dev/hd6446x/hd6446xintcvar.h> 48 49 struct hd6446x_intrhand hd6446x_intrhand[_HD6446X_INTR_N]; 50 uint16_t hd6446x_imask[_IPL_N]; 51 uint16_t hd6446x_ienable; 52 53 static void hd6446x_intr_priority_update(void); 54 55 56 void 57 hd6446x_intr_init(void) 58 { 59 60 /* Initialize interrupt priority masks. */ 61 hd6446x_intr_priority_update(); 62 } 63 64 void * 65 hd6446x_intr_establish(int irq, int mode, int level, 66 int (*func)(void *), void *arg) 67 { 68 struct hd6446x_intrhand *hh = &hd6446x_intrhand[ffs(irq) - 1]; 69 int s; 70 71 s = splhigh(); 72 73 /* Register interrupt handler */ 74 hh->hh_func = func; 75 hh->hh_arg = arg; 76 hh->hh_ipl = level << 4; 77 hh->hh_imask = irq; 78 hd6446x_ienable |= hh->hh_imask; 79 80 /* Update interrupt priority masks. */ 81 hd6446x_intr_priority_update(); 82 83 splx(s); 84 85 return (hh); 86 } 87 88 void 89 hd6446x_intr_disestablish(void *handle) 90 { 91 struct hd6446x_intrhand *hh = handle; 92 int s; 93 94 s = splhigh(); 95 96 /* Update interrupt priority masks */ 97 hd6446x_ienable &= ~hh->hh_imask; 98 memset(hh, 0, sizeof(*hh)); 99 hd6446x_intr_priority_update(); 100 101 splx(s); 102 } 103 104 void 105 hd6446x_intr_priority(int irq, int level) 106 { 107 struct hd6446x_intrhand *hh = &hd6446x_intrhand[ffs(irq) - 1]; 108 int s; 109 110 KDASSERT(hh->hh_func != NULL); 111 s = splhigh(); 112 hh->hh_ipl = level << 4; 113 hd6446x_intr_priority_update(); 114 splx(s); 115 } 116 117 static void 118 hd6446x_intr_priority_update(void) 119 { 120 int ipl, src; 121 122 for (ipl = 0; ipl < _IPL_N; ipl++) { 123 uint16_t mask = ~hd6446x_ienable; /* mask disabled */ 124 125 /* mask sources interrupting at <= ipl */ 126 for (src = 0; src < _HD6446X_INTR_N; ++src) { 127 struct hd6446x_intrhand *hh = &hd6446x_intrhand[src]; 128 129 if (hh->hh_func != NULL && hh->hh_ipl <= (ipl << 4)) 130 mask |= 1 << src; 131 } 132 133 hd6446x_imask[ipl] = mask; 134 } 135 } 136