pic_distopenpic.c revision 1.10
1 /* $NetBSD: pic_distopenpic.c,v 1.10 2017/06/01 02:45:07 chs 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 1.10 2017/06/01 02:45:07 chs Exp $"); 34 35 #include "opt_openpic.h" 36 #include "opt_interrupt.h" 37 38 #include <sys/param.h> 39 #include <sys/kernel.h> 40 #include <sys/kmem.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 = kmem_alloc(sizeof(*opicops), KM_SLEEP); 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 = kmem_alloc(sizeof(volatile u_char *) * nrofisus, 76 KM_SLEEP); 77 opicops->irq_per = kmem_alloc(sizeof(uint8_t) * nrofisus, KM_SLEEP); 78 79 for (irq=0, i=0; i < nrofisus ; i++) { 80 opicops->isu[i] = (void *)isu[i]; 81 opicops->irq_per[i] = maps[i]/0x20; 82 irq += maps[i]/0x20; 83 aprint_debug("%d: irqtotal=%d, added %d\n", i, irq, 84 maps[i]/0x20); 85 } 86 aprint_normal("OpenPIC Version 1.%d: " 87 "Supports %d CPUs and %d interrupt sources.\n", 88 x & 0xff, ((x & 0x1f00) >> 8) + 1, irq); 89 pic->pic_numintrs = irq; 90 pic->pic_cookie = addr; 91 pic->pic_enable_irq = distopic_enable_irq; 92 pic->pic_reenable_irq = distopic_enable_irq; 93 pic->pic_disable_irq = distopic_disable_irq; 94 pic->pic_get_irq = opic_get_irq; 95 pic->pic_ack_irq = opic_ack_irq; 96 pic->pic_establish_irq = distopic_establish_irq; 97 pic->pic_finish_setup = distopic_finish_setup; 98 opicops->flags = OPENPIC_FLAG_DIST; 99 strcpy(pic->pic_name, "openpic"); 100 pic_add(pic); 101 102 openpic_set_priority(0, 15); 103 104 for (i=0; i < nrofisus; i++) { 105 for (irq = 0; irq < opicops->irq_per[i]; irq++) { 106 /* make sure to keep disabled */ 107 distopic_write(opicops, i, 108 OPENPIC_DSRC_VECTOR_OFFSET(irq), OPENPIC_IMASK); 109 /* send all interrupts to CPU 0 */ 110 distopic_write(opicops, i, 111 OPENPIC_DSRC_IDEST_OFFSET(irq), 1 << 0); 112 } 113 } 114 115 x = openpic_read(OPENPIC_CONFIG); 116 x |= OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 117 openpic_write(OPENPIC_CONFIG, x); 118 119 openpic_write(OPENPIC_SPURIOUS_VECTOR, 0xff); 120 121 openpic_set_priority(0, 0); 122 123 /* clear all pending interrunts */ 124 for (irq = 0; irq < pic->pic_numintrs; irq++) { 125 openpic_read_irq(0); 126 openpic_eoi(0); 127 } 128 129 #if 0 130 printf("timebase freq=%d\n", openpic_read(0x10f0)); 131 #endif 132 return pic; 133 134 } 135 136 /* Begin distributed openpic code */ 137 138 static int 139 opic_isu_from_irq(struct openpic_ops *opic, int irq, int *realirq) 140 { 141 int i; 142 143 for (i=0; i < opic->nrofisus; i++) { 144 if (irq < opic->irq_per[i]) { 145 *realirq = irq; 146 return i; 147 } else 148 irq -= opic->irq_per[i]; 149 } 150 return -1; 151 } 152 153 static u_int 154 distopic_read(struct openpic_ops *opic, int isu, int offset) 155 { 156 volatile unsigned char *addr = opic->isu[isu] + offset; 157 158 return in32rb(addr); 159 } 160 161 static void 162 distopic_write(struct openpic_ops *opic, int isu, int offset, u_int val) 163 { 164 volatile unsigned char *addr = opic->isu[isu] + offset; 165 166 out32rb(addr, val); 167 } 168 169 static void 170 distopic_establish_irq(struct pic_ops *pic, int irq, int type, int pri) 171 { 172 struct openpic_ops *opic = (struct openpic_ops *)pic; 173 int isu, realirq = -1, realpri = max(1, min(15, pri)); 174 uint32_t x; 175 176 isu = opic_isu_from_irq(opic, irq, &realirq); 177 KASSERT(isu != -1); 178 179 x = irq; 180 x |= OPENPIC_IMASK; 181 182 if ((realirq == 0 && isu == 0) || 183 type == IST_EDGE_RISING || type == IST_LEVEL_HIGH) 184 x |= OPENPIC_POLARITY_POSITIVE; 185 else 186 x |= OPENPIC_POLARITY_NEGATIVE; 187 188 if (type == IST_EDGE_FALLING || type == IST_EDGE_RISING) 189 x |= OPENPIC_SENSE_EDGE; 190 else 191 x |= OPENPIC_SENSE_LEVEL; 192 193 x |= realpri << OPENPIC_PRIORITY_SHIFT; 194 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 195 196 aprint_debug("%s: setting IRQ %d to priority %d 0x%x\n", __func__, 197 irq, realpri, x); 198 } 199 200 static void 201 distopic_enable_irq(struct pic_ops *pic, int irq, int type) 202 { 203 struct openpic_ops *opic = (struct openpic_ops *)pic; 204 int isu, realirq = -1; 205 u_int x; 206 207 isu = opic_isu_from_irq(opic, irq, &realirq); 208 KASSERT(isu != -1); 209 x = distopic_read(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq)); 210 x &= ~OPENPIC_IMASK; 211 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 212 } 213 214 static void 215 distopic_disable_irq(struct pic_ops *pic, int irq) 216 { 217 struct openpic_ops *opic = (struct openpic_ops *)pic; 218 int isu, realirq = -1; 219 u_int x; 220 221 isu = opic_isu_from_irq(opic, irq, &realirq); 222 KASSERT(isu != -1); 223 x = distopic_read(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq)); 224 x |= OPENPIC_IMASK; 225 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 226 } 227 228 static void 229 distopic_finish_setup(struct pic_ops *pic) 230 { 231 struct openpic_ops *opic = (struct openpic_ops *)pic; 232 uint32_t cpumask = 0; 233 int i, irq; 234 235 #ifdef OPENPIC_DISTRIBUTE 236 for (i = 0; i < ncpu; i++) 237 cpumask |= (1 << cpu_info[i].ci_index); 238 #else 239 cpumask = 1; 240 #endif 241 for (i=0; i < opic->nrofisus; i++) { 242 for (irq = 0; irq < opic->irq_per[i]; irq++) { 243 distopic_write(opic, i, OPENPIC_DSRC_IDEST_OFFSET(irq), 244 cpumask); 245 } 246 } 247 } 248
Indexes created Tue Sep 30 11:09:46 GMT 2025