pic_openpic.c revision 1.1.2.2
1 /* $NetBSD: pic_openpic.c,v 1.1.2.2 2007/05/03 03:18:33 macallan Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Michael Lorenz 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of The NetBSD Foundation nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 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: pic_openpic.c,v 1.1.2.2 2007/05/03 03:18:33 macallan Exp $"); 34 35 #include "opt_interrupt.h" 36 37 #ifdef PIC_OPENPIC 38 39 #include <sys/param.h> 40 #include <sys/malloc.h> 41 #include <sys/kernel.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #include <machine/pio.h> 46 #include <powerpc/openpic.h> 47 48 #include <dev/ofw/openfirm.h> 49 50 #include <machine/autoconf.h> 51 #include <arch/powerpc/pic/picvar.h> 52 53 static int opic_irq_is_enabled(struct pic_ops *, int); 54 static void opic_enable_irq(struct pic_ops *, int, int); 55 static void opic_disable_irq(struct pic_ops *, int); 56 static void opic_clear_irq(struct pic_ops *, int); 57 static int opic_get_irq(struct pic_ops *); 58 static void opic_ack_irq(struct pic_ops *, int); 59 60 struct openpic_ops { 61 struct pic_ops pic; 62 uint32_t enable_mask; 63 }; 64 65 struct pic_ops * 66 setup_openpic(uint32_t addr, int num, int passthrough) 67 { 68 struct openpic_ops *openpic; 69 struct pic_ops *pic; 70 int irq; 71 u_int x; 72 73 openpic_base = (void *)addr; 74 openpic = malloc(sizeof(struct openpic_ops), M_DEVBUF, M_NOWAIT); 75 KASSERT(openpic != NULL); 76 pic = &openpic->pic; 77 78 pic->pic_numintrs = num; 79 pic->pic_cookie = (void *)addr; 80 pic->pic_irq_is_enabled = opic_irq_is_enabled; 81 pic->pic_enable_irq = opic_enable_irq; 82 pic->pic_reenable_irq = opic_enable_irq; 83 pic->pic_disable_irq = opic_disable_irq; 84 pic->pic_clear_irq = opic_clear_irq; 85 pic->pic_get_irq = opic_get_irq; 86 pic->pic_ack_irq = opic_ack_irq; 87 strcpy(pic->pic_name, "openpic"); 88 pic_add(pic); 89 90 /* disable all interrupts */ 91 for (irq = 0; irq < 256; irq++) 92 openpic_write(OPENPIC_SRC_VECTOR(irq), OPENPIC_IMASK); 93 94 openpic_set_priority(0, 15); 95 96 x = openpic_read(OPENPIC_CONFIG); 97 if (passthrough) { 98 x &= ~OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 99 } else { 100 x |= OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 101 } 102 openpic_write(OPENPIC_CONFIG, x); 103 104 /* send all interrupts to CPU 0 */ 105 for (irq = 0; irq < ICU_LEN; irq++) 106 openpic_write(OPENPIC_IDEST(irq), 1 << 0); 107 108 for (irq = 0; irq < ICU_LEN; irq++) { 109 x = irq; 110 x |= OPENPIC_IMASK; 111 x |= OPENPIC_POLARITY_POSITIVE; 112 x |= OPENPIC_SENSE_LEVEL; 113 x |= 8 << OPENPIC_PRIORITY_SHIFT; 114 openpic_write(OPENPIC_SRC_VECTOR(irq), x); 115 } 116 117 openpic_set_priority(0, 0); 118 119 /* clear all pending interrunts */ 120 for (irq = 0; irq < 256; irq++) { 121 openpic_read_irq(0); 122 openpic_eoi(0); 123 } 124 125 for (irq = 0; irq < num; irq++) 126 openpic_disable_irq(irq); 127 128 #ifdef MULTIPROCESSOR 129 x = openpic_read(OPENPIC_IPI_VECTOR(1)); 130 x &= ~(OPENPIC_IMASK | OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK); 131 x |= (15 << OPENPIC_PRIORITY_SHIFT) | IPI_VECTOR; 132 openpic_write(OPENPIC_IPI_VECTOR(1), x); 133 #endif 134 135 return pic; 136 } 137 138 static int 139 opic_irq_is_enabled(struct pic_ops *pic, int irq) 140 { 141 /* XXX */ 142 143 return 1; 144 } 145 146 static void 147 opic_enable_irq(struct pic_ops *pic, int irq, int type) 148 { 149 150 openpic_enable_irq(irq, type); 151 } 152 153 static void 154 opic_disable_irq(struct pic_ops *pic, int irq) 155 { 156 157 openpic_disable_irq(irq); 158 } 159 160 static void 161 opic_clear_irq(struct pic_ops *pic, int irq) 162 { 163 164 /* we only use ack here */ 165 } 166 167 static int 168 opic_get_irq(struct pic_ops *pic) 169 { 170 171 return openpic_read_irq(cpu_number()); 172 } 173 174 static void 175 opic_ack_irq(struct pic_ops *pic, int irq) 176 { 177 178 openpic_eoi(cpu_number()); 179 } 180 181 #endif /* PIC_OPENPIC */ 182
Indexes created Tue Oct 28 02:10:10 GMT 2025