1 /* $NetBSD: pic_distopenpic.c,v 1.4 2008/05/10 15:31:05 martin 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 1.4 2008/05/10 15:31:05 martin Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.h> 38 39 #include <uvm/uvm_extern.h> 40 41 #include <machine/pio.h> 42 #include <powerpc/openpic.h> 43 44 #include <arch/powerpc/pic/picvar.h> 45 46 #include "opt_interrupt.h" 47 48 /* distributed stuff */ 49 static int opic_isu_from_irq(struct openpic_ops *, int, int *); 50 static u_int distopic_read(struct openpic_ops *, int, int); 51 static void distopic_write(struct openpic_ops *, int, int, u_int); 52 static void distopic_establish_irq(struct pic_ops *, int, int, int); 53 static void distopic_enable_irq(struct pic_ops *, int, int); 54 static void distopic_disable_irq(struct pic_ops *, int); 55 static void distopic_finish_setup(struct pic_ops *); 56 57 struct pic_ops * 58 setup_distributed_openpic(void *addr, int nrofisus, void **isu, int *maps) 59 { 60 struct openpic_ops *opicops; 61 struct pic_ops *pic; 62 int irq, i; 63 u_int x; 64 65 openpic_base = (void *)addr; 66 opicops = malloc(sizeof(struct openpic_ops), M_DEVBUF, M_NOWAIT); 67 KASSERT(opicops != NULL); 68 pic = &opicops->pic; 69 70 x = openpic_read(OPENPIC_FEATURE); 71 if (((x & 0x07ff0000) >> 16) != 0) 72 panic("Can't handle a distributed openpic with internal ISU"); 73 74 opicops->nrofisus = nrofisus; 75 opicops->isu = malloc(sizeof(volatile unsigned char *) * nrofisus, 76 M_DEVBUF, M_NOWAIT); 77 KASSERT(opicops->isu != NULL); 78 opicops->irq_per = malloc(sizeof(uint8_t) * nrofisus, 79 M_DEVBUF, M_NOWAIT); 80 KASSERT(opicops->irq_per != NULL); 81 82 for (irq=0, i=0; i < nrofisus ; i++) { 83 opicops->isu[i] = (void *)isu[i]; 84 opicops->irq_per[i] = maps[i]/0x20; 85 irq += maps[i]/0x20; 86 aprint_debug("%d: irqtotal=%d, added %d\n", i, irq, 87 maps[i]/0x20); 88 } 89 aprint_normal("OpenPIC Version 1.%d: " 90 "Supports %d CPUs and %d interrupt sources.\n", 91 x & 0xff, ((x & 0x1f00) >> 8) + 1, irq); 92 pic->pic_numintrs = irq; 93 pic->pic_cookie = addr; 94 pic->pic_enable_irq = distopic_enable_irq; 95 pic->pic_reenable_irq = distopic_enable_irq; 96 pic->pic_disable_irq = distopic_disable_irq; 97 pic->pic_get_irq = opic_get_irq; 98 pic->pic_ack_irq = opic_ack_irq; 99 pic->pic_establish_irq = distopic_establish_irq; 100 pic->pic_finish_setup = distopic_finish_setup; 101 opicops->flags = OPENPIC_FLAG_DIST; 102 strcpy(pic->pic_name, "openpic"); 103 pic_add(pic); 104 105 openpic_set_priority(0, 15); 106 107 for (i=0; i < nrofisus; i++) { 108 for (irq = 0; irq < opicops->irq_per[i]; irq++) { 109 /* make sure to keep disabled */ 110 distopic_write(opicops, i, 111 OPENPIC_DSRC_VECTOR_OFFSET(irq), OPENPIC_IMASK); 112 /* send all interrupts to CPU 0 */ 113 distopic_write(opicops, i, 114 OPENPIC_DSRC_IDEST_OFFSET(irq), 1 << 0); 115 } 116 } 117 118 x = openpic_read(OPENPIC_CONFIG); 119 x |= OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 120 openpic_write(OPENPIC_CONFIG, x); 121 122 openpic_write(OPENPIC_SPURIOUS_VECTOR, 0xff); 123 124 openpic_set_priority(0, 0); 125 126 /* clear all pending interrunts */ 127 for (irq = 0; irq < pic->pic_numintrs; irq++) { 128 openpic_read_irq(0); 129 openpic_eoi(0); 130 } 131 132 #if 0 133 printf("timebase freq=%d\n", openpic_read(0x10f0)); 134 #endif 135 return pic; 136 137 } 138 139 /* Begin distributed openpic code */ 140 141 static int 142 opic_isu_from_irq(struct openpic_ops *opic, int irq, int *realirq) 143 { 144 int i; 145 146 for (i=0; i < opic->nrofisus; i++) { 147 if (irq < opic->irq_per[i]) { 148 *realirq = irq; 149 return i; 150 } else 151 irq -= opic->irq_per[i]; 152 } 153 return -1; 154 } 155 156 static u_int 157 distopic_read(struct openpic_ops *opic, int isu, int offset) 158 { 159 volatile unsigned char *addr = opic->isu[isu] + offset; 160 161 return in32rb(addr); 162 } 163 164 static void 165 distopic_write(struct openpic_ops *opic, int isu, int offset, u_int val) 166 { 167 volatile unsigned char *addr = opic->isu[isu] + offset; 168 169 out32rb(addr, val); 170 } 171 172 static void 173 distopic_establish_irq(struct pic_ops *pic, int irq, int type, int pri) 174 { 175 struct openpic_ops *opic = (struct openpic_ops *)pic; 176 int isu, realirq, realpri = max(1, min(15, pri)); 177 uint32_t x; 178 179 isu = opic_isu_from_irq(opic, irq, &realirq); 180 KASSERT(isu != -1); 181 182 x = irq; 183 x |= OPENPIC_IMASK; 184 x |= (realirq == 0 && isu == 0) ? 185 OPENPIC_POLARITY_POSITIVE : OPENPIC_POLARITY_NEGATIVE; 186 x |= (type == IST_EDGE) ? OPENPIC_SENSE_EDGE : OPENPIC_SENSE_LEVEL; 187 x |= realpri << OPENPIC_PRIORITY_SHIFT; 188 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 189 190 aprint_debug("%s: setting IRQ %d to priority %d 0x%x\n", __func__, 191 irq, realpri, x); 192 } 193 194 static void 195 distopic_enable_irq(struct pic_ops *pic, int irq, int type) 196 { 197 struct openpic_ops *opic = (struct openpic_ops *)pic; 198 int isu, realirq; 199 u_int x; 200 201 isu = opic_isu_from_irq(opic, irq, &realirq); 202 KASSERT(isu != -1); 203 x = distopic_read(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq)); 204 x &= ~OPENPIC_IMASK; 205 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 206 } 207 208 static void 209 distopic_disable_irq(struct pic_ops *pic, int irq) 210 { 211 struct openpic_ops *opic = (struct openpic_ops *)pic; 212 int isu, realirq; 213 u_int x; 214 215 isu = opic_isu_from_irq(opic, irq, &realirq); 216 KASSERT(isu != -1); 217 x = distopic_read(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq)); 218 x |= OPENPIC_IMASK; 219 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 220 } 221 222 static void 223 distopic_finish_setup(struct pic_ops *pic) 224 { 225 struct openpic_ops *opic = (struct openpic_ops *)pic; 226 uint32_t cpumask = 0; 227 int i, irq; 228 229 #ifdef OPENPIC_DISTRIBUTE 230 for (i = 0; i < ncpu; i++) 231 cpumask |= (1 << cpu_info[i].ci_index); 232 #else 233 cpumask = 1; 234 #endif 235 for (i=0; i < opic->nrofisus; i++) { 236 for (irq = 0; irq < opic->irq_per[i]; irq++) { 237 distopic_write(opic, i, OPENPIC_DSRC_IDEST_OFFSET(irq), 238 cpumask); 239 } 240 } 241 } 242