pic_distopenpic.c revision 1.8
1 /* $NetBSD: pic_distopenpic.c,v 1.8 2012/01/14 19:35:59 phx Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 Tim Rightnour 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_distopenpic.c,v 1.8 2012/01/14 19:35:59 phx Exp $"); 34 35 #include "opt_openpic.h" 36 #include "opt_interrupt.h" 37 38 #include <sys/param.h> 39 #include <sys/malloc.h> 40 #include <sys/kernel.h> 41 42 #include <uvm/uvm_extern.h> 43 44 #include <machine/pio.h> 45 #include <powerpc/openpic.h> 46 47 #include <powerpc/pic/picvar.h> 48 49 /* distributed stuff */ 50 static int opic_isu_from_irq(struct openpic_ops *, int, int *); 51 static u_int distopic_read(struct openpic_ops *, int, int); 52 static void distopic_write(struct openpic_ops *, int, int, u_int); 53 static void distopic_establish_irq(struct pic_ops *, int, int, int); 54 static void distopic_enable_irq(struct pic_ops *, int, int); 55 static void distopic_disable_irq(struct pic_ops *, int); 56 static void distopic_finish_setup(struct pic_ops *); 57 58 struct pic_ops * 59 setup_distributed_openpic(void *addr, int nrofisus, void **isu, int *maps) 60 { 61 struct openpic_ops *opicops; 62 struct pic_ops *pic; 63 int irq, i; 64 u_int x; 65 66 openpic_base = (void *)addr; 67 opicops = malloc(sizeof(struct openpic_ops), M_DEVBUF, M_NOWAIT); 68 KASSERT(opicops != NULL); 69 pic = &opicops->pic; 70 71 x = openpic_read(OPENPIC_FEATURE); 72 if (((x & 0x07ff0000) >> 16) != 0) 73 panic("Can't handle a distributed openpic with internal ISU"); 74 75 opicops->nrofisus = nrofisus; 76 opicops->isu = malloc(sizeof(volatile unsigned char *) * nrofisus, 77 M_DEVBUF, M_NOWAIT); 78 KASSERT(opicops->isu != NULL); 79 opicops->irq_per = malloc(sizeof(uint8_t) * nrofisus, 80 M_DEVBUF, M_NOWAIT); 81 KASSERT(opicops->irq_per != NULL); 82 83 for (irq=0, i=0; i < nrofisus ; i++) { 84 opicops->isu[i] = (void *)isu[i]; 85 opicops->irq_per[i] = maps[i]/0x20; 86 irq += maps[i]/0x20; 87 aprint_debug("%d: irqtotal=%d, added %d\n", i, irq, 88 maps[i]/0x20); 89 } 90 aprint_normal("OpenPIC Version 1.%d: " 91 "Supports %d CPUs and %d interrupt sources.\n", 92 x & 0xff, ((x & 0x1f00) >> 8) + 1, irq); 93 pic->pic_numintrs = irq; 94 pic->pic_cookie = addr; 95 pic->pic_enable_irq = distopic_enable_irq; 96 pic->pic_reenable_irq = distopic_enable_irq; 97 pic->pic_disable_irq = distopic_disable_irq; 98 pic->pic_get_irq = opic_get_irq; 99 pic->pic_ack_irq = opic_ack_irq; 100 pic->pic_establish_irq = distopic_establish_irq; 101 pic->pic_finish_setup = distopic_finish_setup; 102 opicops->flags = OPENPIC_FLAG_DIST; 103 strcpy(pic->pic_name, "openpic"); 104 pic_add(pic); 105 106 openpic_set_priority(0, 15); 107 108 for (i=0; i < nrofisus; i++) { 109 for (irq = 0; irq < opicops->irq_per[i]; irq++) { 110 /* make sure to keep disabled */ 111 distopic_write(opicops, i, 112 OPENPIC_DSRC_VECTOR_OFFSET(irq), OPENPIC_IMASK); 113 /* send all interrupts to CPU 0 */ 114 distopic_write(opicops, i, 115 OPENPIC_DSRC_IDEST_OFFSET(irq), 1 << 0); 116 } 117 } 118 119 x = openpic_read(OPENPIC_CONFIG); 120 x |= OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 121 openpic_write(OPENPIC_CONFIG, x); 122 123 openpic_write(OPENPIC_SPURIOUS_VECTOR, 0xff); 124 125 openpic_set_priority(0, 0); 126 127 /* clear all pending interrunts */ 128 for (irq = 0; irq < pic->pic_numintrs; irq++) { 129 openpic_read_irq(0); 130 openpic_eoi(0); 131 } 132 133 #if 0 134 printf("timebase freq=%d\n", openpic_read(0x10f0)); 135 #endif 136 return pic; 137 138 } 139 140 /* Begin distributed openpic code */ 141 142 static int 143 opic_isu_from_irq(struct openpic_ops *opic, int irq, int *realirq) 144 { 145 int i; 146 147 for (i=0; i < opic->nrofisus; i++) { 148 if (irq < opic->irq_per[i]) { 149 *realirq = irq; 150 return i; 151 } else 152 irq -= opic->irq_per[i]; 153 } 154 return -1; 155 } 156 157 static u_int 158 distopic_read(struct openpic_ops *opic, int isu, int offset) 159 { 160 volatile unsigned char *addr = opic->isu[isu] + offset; 161 162 return in32rb(addr); 163 } 164 165 static void 166 distopic_write(struct openpic_ops *opic, int isu, int offset, u_int val) 167 { 168 volatile unsigned char *addr = opic->isu[isu] + offset; 169 170 out32rb(addr, val); 171 } 172 173 static void 174 distopic_establish_irq(struct pic_ops *pic, int irq, int type, int pri) 175 { 176 struct openpic_ops *opic = (struct openpic_ops *)pic; 177 int isu, realirq = -1, realpri = max(1, min(15, pri)); 178 uint32_t x; 179 180 isu = opic_isu_from_irq(opic, irq, &realirq); 181 KASSERT(isu != -1); 182 183 x = irq; 184 x |= OPENPIC_IMASK; 185 186 if ((realirq == 0 && isu == 0) || 187 type == IST_EDGE_RISING || type == IST_LEVEL_HIGH) 188 x |= OPENPIC_POLARITY_POSITIVE; 189 else 190 x |= OPENPIC_POLARITY_NEGATIVE; 191 192 if (type == IST_EDGE_FALLING || type == IST_EDGE_RISING) 193 x |= OPENPIC_SENSE_EDGE; 194 else 195 x |= OPENPIC_SENSE_LEVEL; 196 197 x |= realpri << OPENPIC_PRIORITY_SHIFT; 198 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 199 200 aprint_debug("%s: setting IRQ %d to priority %d 0x%x\n", __func__, 201 irq, realpri, x); 202 } 203 204 static void 205 distopic_enable_irq(struct pic_ops *pic, int irq, int type) 206 { 207 struct openpic_ops *opic = (struct openpic_ops *)pic; 208 int isu, realirq = -1; 209 u_int x; 210 211 isu = opic_isu_from_irq(opic, irq, &realirq); 212 KASSERT(isu != -1); 213 x = distopic_read(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq)); 214 x &= ~OPENPIC_IMASK; 215 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 216 } 217 218 static void 219 distopic_disable_irq(struct pic_ops *pic, int irq) 220 { 221 struct openpic_ops *opic = (struct openpic_ops *)pic; 222 int isu, realirq = -1; 223 u_int x; 224 225 isu = opic_isu_from_irq(opic, irq, &realirq); 226 KASSERT(isu != -1); 227 x = distopic_read(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq)); 228 x |= OPENPIC_IMASK; 229 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 230 } 231 232 static void 233 distopic_finish_setup(struct pic_ops *pic) 234 { 235 struct openpic_ops *opic = (struct openpic_ops *)pic; 236 uint32_t cpumask = 0; 237 int i, irq; 238 239 #ifdef OPENPIC_DISTRIBUTE 240 for (i = 0; i < ncpu; i++) 241 cpumask |= (1 << cpu_info[i].ci_index); 242 #else 243 cpumask = 1; 244 #endif 245 for (i=0; i < opic->nrofisus; i++) { 246 for (irq = 0; irq < opic->irq_per[i]; irq++) { 247 distopic_write(opic, i, OPENPIC_DSRC_IDEST_OFFSET(irq), 248 cpumask); 249 } 250 } 251 } 252
Indexes created Mon Sep 29 21:09:56 GMT 2025