1/* $OpenBSD: pci_eb64plus.c,v 1.16 2017/09/08 05:36:51 deraadt Exp $ */ 2/* $NetBSD: pci_eb64plus.c,v 1.10 2001/07/27 00:25:20 thorpej Exp $ */ 3 4/*- 5 * Copyright (c) 1998 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 * NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34/* 35 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 36 * All rights reserved. 37 * 38 * Author: Chris G. Demetriou 39 * 40 * Permission to use, copy, modify and distribute this software and 41 * its documentation is hereby granted, provided that both the copyright 42 * notice and this permission notice appear in all copies of the 43 * software, derivative works or modified versions, and any portions 44 * thereof, and that both notices appear in supporting documentation. 45 * 46 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 47 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 48 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 49 * 50 * Carnegie Mellon requests users of this software to return to 51 * 52 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 53 * School of Computer Science 54 * Carnegie Mellon University 55 * Pittsburgh PA 15213-3890 56 * 57 * any improvements or extensions that they make and grant Carnegie the 58 * rights to redistribute these changes. 59 */ 60 61#include <sys/param.h> 62#include <sys/time.h> 63#include <sys/systm.h> 64#include <sys/errno.h> 65#include <sys/malloc.h> 66#include <sys/device.h> 67#include <sys/syslog.h> 68 69#include <uvm/uvm_extern.h> 70 71#include <machine/autoconf.h> 72 73#include <dev/pci/pcireg.h> 74#include <dev/pci/pcivar.h> 75#include <dev/pci/ppbreg.h> 76 77#include <alpha/pci/apecsreg.h> 78#include <alpha/pci/apecsvar.h> 79 80#include <alpha/pci/pci_eb64plus.h> 81 82#include "sio.h" 83#if NSIO 84#include <alpha/pci/siovar.h> 85#endif 86 87int dec_eb64plus_intr_map(struct pci_attach_args *, pci_intr_handle_t *); 88const char *dec_eb64plus_intr_string(void *, pci_intr_handle_t); 89void *dec_eb64plus_intr_establish(void *, pci_intr_handle_t, 90 int, int (*func)(void *), void *, const char *); 91void dec_eb64plus_intr_disestablish(void *, void *); 92 93#define EB64PLUS_MAX_IRQ 32 94#define PCI_STRAY_MAX 5 95 96struct alpha_shared_intr *eb64plus_pci_intr; 97 98bus_space_tag_t eb64plus_intrgate_iot; 99bus_space_handle_t eb64plus_intrgate_ioh; 100 101void eb64plus_iointr(void *arg, unsigned long vec); 102extern void eb64plus_intr_enable(int irq); /* pci_eb64plus_intr.S */ 103extern void eb64plus_intr_disable(int irq); /* pci_eb64plus_intr.S */ 104 105void 106pci_eb64plus_pickintr(acp) 107 struct apecs_config *acp; 108{ 109 bus_space_tag_t iot = &acp->ac_iot; 110 pci_chipset_tag_t pc = &acp->ac_pc; 111 int i; 112 113 pc->pc_intr_v = acp; 114 pc->pc_intr_map = dec_eb64plus_intr_map; 115 pc->pc_intr_string = dec_eb64plus_intr_string; 116 pc->pc_intr_establish = dec_eb64plus_intr_establish; 117 pc->pc_intr_disestablish = dec_eb64plus_intr_disestablish; 118 119 /* Not supported on the EB64+. */ 120 pc->pc_pciide_compat_intr_establish = NULL; 121 122 eb64plus_intrgate_iot = iot; 123 if (bus_space_map(eb64plus_intrgate_iot, 0x804, 3, 0, 124 &eb64plus_intrgate_ioh) != 0) 125 panic("pci_eb64plus_pickintr: couldn't map interrupt PLD"); 126 for (i = 0; i < EB64PLUS_MAX_IRQ; i++) 127 eb64plus_intr_disable(i); 128 129 eb64plus_pci_intr = alpha_shared_intr_alloc(EB64PLUS_MAX_IRQ); 130 for (i = 0; i < EB64PLUS_MAX_IRQ; i++) { 131 alpha_shared_intr_set_maxstrays(eb64plus_pci_intr, i, 132 PCI_STRAY_MAX); 133 } 134 135#if NSIO > 0 136 sio_intr_setup(pc, iot); 137#endif 138} 139 140int 141dec_eb64plus_intr_map(pa, ihp) 142 struct pci_attach_args *pa; 143 pci_intr_handle_t *ihp; 144{ 145 int buspin, line = pa->pa_intrline; 146 147 /* 148 * The console places the interrupt mapping in the "line" value. 149 * We trust it whenever possible. 150 */ 151 if (line >= 0 && line < EB64PLUS_MAX_IRQ) { 152 *ihp = line; 153 return 0; 154 } 155 156 if (pa->pa_bridgetag) { 157 buspin = PPB_INTERRUPT_SWIZZLE(pa->pa_rawintrpin, 158 pa->pa_device); 159 if (pa->pa_bridgeih[buspin - 1] != 0) { 160 *ihp = pa->pa_bridgeih[buspin - 1]; 161 return 0; 162 } 163 } 164 165 return 1; 166} 167 168const char * 169dec_eb64plus_intr_string(acv, ih) 170 void *acv; 171 pci_intr_handle_t ih; 172{ 173 static char irqstr[15]; /* 11 + 2 + NULL + sanity */ 174 175 if (ih >= EB64PLUS_MAX_IRQ) 176 panic("dec_eb64plus_intr_string: bogus eb64+ IRQ 0x%lx", ih); 177 snprintf(irqstr, sizeof irqstr, "eb64+ irq %ld", ih); 178 return (irqstr); 179} 180 181void * 182dec_eb64plus_intr_establish(acv, ih, level, func, arg, name) 183 void *acv; 184 pci_intr_handle_t ih; 185 int level; 186 int (*func)(void *); 187 void *arg; 188 const char *name; 189{ 190 void *cookie; 191 192 if (ih >= EB64PLUS_MAX_IRQ) 193 panic("dec_eb64plus_intr_establish: bogus eb64+ IRQ 0x%lx", 194 ih); 195 196 cookie = alpha_shared_intr_establish(eb64plus_pci_intr, ih, IST_LEVEL, 197 level, func, arg, name); 198 199 if (cookie != NULL && 200 alpha_shared_intr_firstactive(eb64plus_pci_intr, ih)) { 201 scb_set(0x900 + SCB_IDXTOVEC(ih), eb64plus_iointr, NULL); 202 eb64plus_intr_enable(ih); 203 } 204 return (cookie); 205} 206 207void 208dec_eb64plus_intr_disestablish(acv, cookie) 209 void *acv, *cookie; 210{ 211 struct alpha_shared_intrhand *ih = cookie; 212 unsigned int irq = ih->ih_num; 213 int s; 214 215 s = splhigh(); 216 217 alpha_shared_intr_disestablish(eb64plus_pci_intr, cookie); 218 if (alpha_shared_intr_isactive(eb64plus_pci_intr, irq) == 0) { 219 eb64plus_intr_disable(irq); 220 alpha_shared_intr_set_dfltsharetype(eb64plus_pci_intr, irq, 221 IST_NONE); 222 scb_free(0x900 + SCB_IDXTOVEC(irq)); 223 } 224 225 splx(s); 226} 227 228void 229eb64plus_iointr(arg, vec) 230 void *arg; 231 unsigned long vec; 232{ 233 int irq; 234 235 irq = SCB_VECTOIDX(vec - 0x900); 236 237 if (!alpha_shared_intr_dispatch(eb64plus_pci_intr, irq)) { 238 alpha_shared_intr_stray(eb64plus_pci_intr, irq, 239 "eb64+ irq"); 240 if (ALPHA_SHARED_INTR_DISABLE(eb64plus_pci_intr, irq)) 241 eb64plus_intr_disable(irq); 242 } else 243 alpha_shared_intr_reset_strays(eb64plus_pci_intr, irq); 244} 245 246#if 0 /* THIS DOES NOT WORK! see pci_eb64plus_intr.S. */ 247u_int8_t eb64plus_intr_mask[3] = { 0xff, 0xff, 0xff }; 248 249void 250eb64plus_intr_enable(irq) 251 int irq; 252{ 253 int byte = (irq / 8), bit = (irq % 8); 254 255#if 1 256 printf("eb64plus_intr_enable: enabling %d (%d:%d)\n", irq, byte, bit); 257#endif 258 eb64plus_intr_mask[byte] &= ~(1 << bit); 259 260 bus_space_write_1(eb64plus_intrgate_iot, eb64plus_intrgate_ioh, byte, 261 eb64plus_intr_mask[byte]); 262} 263 264void 265eb64plus_intr_disable(irq) 266 int irq; 267{ 268 int byte = (irq / 8), bit = (irq % 8); 269 270#if 1 271 printf("eb64plus_intr_disable: disabling %d (%d:%d)\n", irq, byte, bit); 272#endif 273 eb64plus_intr_mask[byte] |= (1 << bit); 274 275 bus_space_write_1(eb64plus_intrgate_iot, eb64plus_intrgate_ioh, byte, 276 eb64plus_intr_mask[byte]); 277} 278#endif 279