pic_distopenpic.c revision 1.12
1 /* $NetBSD: pic_distopenpic.c,v 1.12 2020/07/06 09:34:18 rin 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 1.12 2020/07/06 09:34:18 rin Exp $"); 34 35 #ifdef _KERNEL_OPT 36 #include "opt_interrupt.h" 37 #include "opt_openpic.h" 38 #endif 39 40 #include <sys/param.h> 41 #include <sys/kernel.h> 42 #include <sys/kmem.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <machine/pio.h> 47 #include <powerpc/openpic.h> 48 49 #include <powerpc/pic/picvar.h> 50 51 /* distributed stuff */ 52 static int opic_isu_from_irq(struct openpic_ops *, int, int *); 53 static u_int distopic_read(struct openpic_ops *, int, int); 54 static void distopic_write(struct openpic_ops *, int, int, u_int); 55 static void distopic_establish_irq(struct pic_ops *, int, int, int); 56 static void distopic_enable_irq(struct pic_ops *, int, int); 57 static void distopic_disable_irq(struct pic_ops *, int); 58 static void distopic_finish_setup(struct pic_ops *); 59 60 struct pic_ops * 61 setup_distributed_openpic(void *addr, int nrofisus, void **isu, int *maps) 62 { 63 struct openpic_ops *opicops; 64 struct pic_ops *pic; 65 int irq, i; 66 u_int x; 67 68 openpic_base = (void *)addr; 69 opicops = kmem_alloc(sizeof(*opicops), KM_SLEEP); 70 pic = &opicops->pic; 71 72 x = openpic_read(OPENPIC_FEATURE); 73 if (((x & 0x07ff0000) >> 16) != 0) 74 panic("Can't handle a distributed openpic with internal ISU"); 75 76 opicops->nrofisus = nrofisus; 77 opicops->isu = kmem_alloc(sizeof(volatile u_char *) * nrofisus, 78 KM_SLEEP); 79 opicops->irq_per = kmem_alloc(sizeof(uint8_t) * nrofisus, KM_SLEEP); 80 81 for (irq=0, i=0; i < nrofisus ; i++) { 82 opicops->isu[i] = (void *)isu[i]; 83 opicops->irq_per[i] = maps[i]/0x20; 84 irq += maps[i]/0x20; 85 aprint_debug("%d: irqtotal=%d, added %d\n", i, irq, 86 maps[i]/0x20); 87 } 88 aprint_normal("OpenPIC Version 1.%d: " 89 "Supports %d CPUs and %d interrupt sources.\n", 90 x & 0xff, ((x & 0x1f00) >> 8) + 1, irq); 91 pic->pic_numintrs = irq; 92 pic->pic_cookie = addr; 93 pic->pic_enable_irq = distopic_enable_irq; 94 pic->pic_reenable_irq = distopic_enable_irq; 95 pic->pic_disable_irq = distopic_disable_irq; 96 pic->pic_get_irq = opic_get_irq; 97 pic->pic_ack_irq = opic_ack_irq; 98 pic->pic_establish_irq = distopic_establish_irq; 99 pic->pic_finish_setup = distopic_finish_setup; 100 opicops->flags = OPENPIC_FLAG_DIST; 101 strcpy(pic->pic_name, "openpic"); 102 pic_add(pic); 103 104 openpic_set_priority(0, 15); 105 106 for (i=0; i < nrofisus; i++) { 107 for (irq = 0; irq < opicops->irq_per[i]; irq++) { 108 /* make sure to keep disabled */ 109 distopic_write(opicops, i, 110 OPENPIC_DSRC_VECTOR_OFFSET(irq), OPENPIC_IMASK); 111 /* send all interrupts to CPU 0 */ 112 distopic_write(opicops, i, 113 OPENPIC_DSRC_IDEST_OFFSET(irq), 1 << 0); 114 } 115 } 116 117 x = openpic_read(OPENPIC_CONFIG); 118 x |= OPENPIC_CONFIG_8259_PASSTHRU_DISABLE; 119 openpic_write(OPENPIC_CONFIG, x); 120 121 openpic_write(OPENPIC_SPURIOUS_VECTOR, 0xff); 122 123 openpic_set_priority(0, 0); 124 125 /* clear all pending interrunts */ 126 for (irq = 0; irq < pic->pic_numintrs; irq++) { 127 openpic_read_irq(0); 128 openpic_eoi(0); 129 } 130 131 #if 0 132 printf("timebase freq=%d\n", openpic_read(0x10f0)); 133 #endif 134 return pic; 135 136 } 137 138 /* Begin distributed openpic code */ 139 140 static int 141 opic_isu_from_irq(struct openpic_ops *opic, int irq, int *realirq) 142 { 143 int i; 144 145 for (i=0; i < opic->nrofisus; i++) { 146 if (irq < opic->irq_per[i]) { 147 *realirq = irq; 148 return i; 149 } else 150 irq -= opic->irq_per[i]; 151 } 152 return -1; 153 } 154 155 static u_int 156 distopic_read(struct openpic_ops *opic, int isu, int offset) 157 { 158 volatile unsigned char *addr = opic->isu[isu] + offset; 159 160 return in32rb(addr); 161 } 162 163 static void 164 distopic_write(struct openpic_ops *opic, int isu, int offset, u_int val) 165 { 166 volatile unsigned char *addr = opic->isu[isu] + offset; 167 168 out32rb(addr, val); 169 } 170 171 static void 172 distopic_establish_irq(struct pic_ops *pic, int irq, int type, int pri) 173 { 174 struct openpic_ops *opic = (struct openpic_ops *)pic; 175 int isu, realirq = -1, realpri = uimax(1, uimin(15, pri)); 176 uint32_t x; 177 178 isu = opic_isu_from_irq(opic, irq, &realirq); 179 KASSERT(isu != -1); 180 181 x = irq; 182 x |= OPENPIC_IMASK; 183 184 if ((realirq == 0 && isu == 0) || 185 type == IST_EDGE_RISING || type == IST_LEVEL_HIGH) 186 x |= OPENPIC_POLARITY_POSITIVE; 187 else 188 x |= OPENPIC_POLARITY_NEGATIVE; 189 190 if (type == IST_EDGE_FALLING || type == IST_EDGE_RISING) 191 x |= OPENPIC_SENSE_EDGE; 192 else 193 x |= OPENPIC_SENSE_LEVEL; 194 195 x |= realpri << OPENPIC_PRIORITY_SHIFT; 196 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 197 198 aprint_debug("%s: setting IRQ %d to priority %d 0x%x\n", __func__, 199 irq, realpri, x); 200 } 201 202 static void 203 distopic_enable_irq(struct pic_ops *pic, int irq, int type) 204 { 205 struct openpic_ops *opic = (struct openpic_ops *)pic; 206 int isu, realirq = -1; 207 u_int x; 208 209 isu = opic_isu_from_irq(opic, irq, &realirq); 210 KASSERT(isu != -1); 211 x = distopic_read(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq)); 212 x &= ~OPENPIC_IMASK; 213 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 214 } 215 216 static void 217 distopic_disable_irq(struct pic_ops *pic, int irq) 218 { 219 struct openpic_ops *opic = (struct openpic_ops *)pic; 220 int isu, realirq = -1; 221 u_int x; 222 223 isu = opic_isu_from_irq(opic, irq, &realirq); 224 KASSERT(isu != -1); 225 x = distopic_read(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq)); 226 x |= OPENPIC_IMASK; 227 distopic_write(opic, isu, OPENPIC_DSRC_VECTOR_OFFSET(realirq), x); 228 } 229 230 static void 231 distopic_finish_setup(struct pic_ops *pic) 232 { 233 struct openpic_ops *opic = (struct openpic_ops *)pic; 234 uint32_t cpumask = 0; 235 int i, irq; 236 237 #ifdef OPENPIC_DISTRIBUTE 238 for (i = 0; i < ncpu; i++) 239 cpumask |= (1 << cpu_info[i].ci_index); 240 #else 241 cpumask = 1; 242 #endif 243 for (i=0; i < opic->nrofisus; i++) { 244 for (irq = 0; irq < opic->irq_per[i]; irq++) { 245 distopic_write(opic, i, OPENPIC_DSRC_IDEST_OFFSET(irq), 246 cpumask); 247 } 248 } 249 } 250
Indexes created Tue Sep 30 11:09:46 GMT 2025