pic_openpic.c revision 1.1.2.1
1 /* $NetBSD: pic_openpic.c,v 1.1.2.1 2007/05/02 23:51:38 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 1.1.2.1 2007/05/02 23:51:38 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 static struct openpic_ops *setup_openpic(uint32_t, int, int); 66 67 static struct openpic_ops * 68 setup_openpic(uint32_t addr, int num, int passthrough) 69 { 70 struct openpic_ops *openpic; 71 struct pic_ops *pic; 72 int irq; 73 u_int x; 74 75 openpic_base = (void *)addr; 76 openpic = malloc(sizeof(struct openpic_ops), M_DEVBUF, M_NOWAIT); 77 KASSERT(openpic != NULL); 78 pic = &openpic->pic; 79 80 pic->pic_numintrs = num; 81 pic->pic_cookie = (void *)addr; 82 pic->pic_irq_is_enabled = opic_irq_is_enabled; 83 pic->pic_enable_irq = opic_enable_irq; 84 pic->pic_reenable_irq = opic_enable_irq; 85 pic->pic_disable_irq = opic_disable_irq; 86 pic->pic_clear_irq = opic_clear_irq; 87 pic->pic_get_irq = opic_get_irq; 88 pic->pic_ack_irq = opic_ack_irq; 89 strcpy(pic->pic_name, "openpic"); 90 pic_add(pic); 91 92 /* disable all interrupts */ 93 for (irq = 0; irq < 256; irq++) 94 openpic_write(OPENPIC_SRC_VECTOR(irq), OPENPIC_IMASK); 95 96 openpic_set_priority(0, 15); 97 98 x = openpic_read(OPENPIC_CONFIG); 99 if (passthrough) { 100 x &= ~OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 101 } else { 102 x |= OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 103 } 104 openpic_write(OPENPIC_CONFIG, x); 105 106 /* send all interrupts to CPU 0 */ 107 for (irq = 0; irq < ICU_LEN; irq++) 108 openpic_write(OPENPIC_IDEST(irq), 1 << 0); 109 110 for (irq = 0; irq < ICU_LEN; irq++) { 111 x = irq; 112 x |= OPENPIC_IMASK; 113 x |= OPENPIC_POLARITY_POSITIVE; 114 x |= OPENPIC_SENSE_LEVEL; 115 x |= 8 << OPENPIC_PRIORITY_SHIFT; 116 openpic_write(OPENPIC_SRC_VECTOR(irq), x); 117 } 118 119 openpic_set_priority(0, 0); 120 121 /* clear all pending interrunts */ 122 for (irq = 0; irq < 256; irq++) { 123 openpic_read_irq(0); 124 openpic_eoi(0); 125 } 126 127 for (irq = 0; irq < num; irq++) 128 openpic_disable_irq(irq); 129 130 #ifdef MULTIPROCESSOR 131 x = openpic_read(OPENPIC_IPI_VECTOR(1)); 132 x &= ~(OPENPIC_IMASK | OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK); 133 x |= (15 << OPENPIC_PRIORITY_SHIFT) | IPI_VECTOR; 134 openpic_write(OPENPIC_IPI_VECTOR(1), x); 135 #endif 136 137 return openpic; 138 } 139 140 static int 141 opic_irq_is_enabled(struct pic_ops *pic, int irq) 142 { 143 /* XXX */ 144 145 return 1; 146 } 147 148 static void 149 opic_enable_irq(struct pic_ops *pic, int irq, int type) 150 { 151 152 openpic_enable_irq(irq, type); 153 } 154 155 static void 156 opic_disable_irq(struct pic_ops *pic, int irq) 157 { 158 159 openpic_disable_irq(irq); 160 } 161 162 static void 163 opic_clear_irq(struct pic_ops *pic, int irq) 164 { 165 166 /* we only use ack here */ 167 } 168 169 static int 170 opic_get_irq(struct pic_ops *pic) 171 { 172 173 return openpic_read_irq(cpu_number()); 174 } 175 176 static void 177 opic_ack_irq(struct pic_ops *pic, int irq) 178 { 179 180 openpic_eoi(cpu_number()); 181 } 182 183 #endif /* PIC_OPENPIC */ 184
Indexes created Tue Oct 28 02:10:10 GMT 2025