1/* $OpenBSD: apecs_pci.c,v 1.12 2015/10/30 07:51:49 miod Exp $ */ 2/* $NetBSD: apecs_pci.c,v 1.10 1996/11/13 21:13:25 cgd Exp $ */ 3 4/* 5 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 6 * All rights reserved. 7 * 8 * Author: Chris G. Demetriou 9 * 10 * Permission to use, copy, modify and distribute this software and 11 * its documentation is hereby granted, provided that both the copyright 12 * notice and this permission notice appear in all copies of the 13 * software, derivative works or modified versions, and any portions 14 * thereof, and that both notices appear in supporting documentation. 15 * 16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19 * 20 * Carnegie Mellon requests users of this software to return to 21 * 22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 23 * School of Computer Science 24 * Carnegie Mellon University 25 * Pittsburgh PA 15213-3890 26 * 27 * any improvements or extensions that they make and grant Carnegie the 28 * rights to redistribute these changes. 29 */ 30 31#include <sys/param.h> 32#include <sys/systm.h> 33#include <sys/kernel.h> 34#include <sys/device.h> 35 36#include <uvm/uvm_extern.h> 37 38#include <machine/autoconf.h> /* badaddr() proto */ 39 40#include <dev/pci/pcireg.h> 41#include <dev/pci/pcivar.h> 42#include <alpha/pci/apecsreg.h> 43#include <alpha/pci/apecsvar.h> 44 45void apecs_attach_hook(struct device *, struct device *, 46 struct pcibus_attach_args *); 47int apecs_bus_maxdevs(void *, int); 48pcitag_t apecs_make_tag(void *, int, int, int); 49void apecs_decompose_tag(void *, pcitag_t, int *, int *, 50 int *); 51int apecs_conf_size(void *, pcitag_t); 52pcireg_t apecs_conf_read(void *, pcitag_t, int); 53void apecs_conf_write(void *, pcitag_t, int, pcireg_t); 54 55void 56apecs_pci_init(pc, v) 57 pci_chipset_tag_t pc; 58 void *v; 59{ 60 61 pc->pc_conf_v = v; 62 pc->pc_attach_hook = apecs_attach_hook; 63 pc->pc_bus_maxdevs = apecs_bus_maxdevs; 64 pc->pc_make_tag = apecs_make_tag; 65 pc->pc_decompose_tag = apecs_decompose_tag; 66 pc->pc_conf_size = apecs_conf_size; 67 pc->pc_conf_read = apecs_conf_read; 68 pc->pc_conf_write = apecs_conf_write; 69} 70 71void 72apecs_attach_hook(parent, self, pba) 73 struct device *parent, *self; 74 struct pcibus_attach_args *pba; 75{ 76} 77 78int 79apecs_bus_maxdevs(cpv, busno) 80 void *cpv; 81 int busno; 82{ 83 84 return 32; 85} 86 87pcitag_t 88apecs_make_tag(cpv, b, d, f) 89 void *cpv; 90 int b, d, f; 91{ 92 93 return (b << 16) | (d << 11) | (f << 8); 94} 95 96void 97apecs_decompose_tag(cpv, tag, bp, dp, fp) 98 void *cpv; 99 pcitag_t tag; 100 int *bp, *dp, *fp; 101{ 102 103 if (bp != NULL) 104 *bp = (tag >> 16) & 0xff; 105 if (dp != NULL) 106 *dp = (tag >> 11) & 0x1f; 107 if (fp != NULL) 108 *fp = (tag >> 8) & 0x7; 109} 110 111int 112apecs_conf_size(void *cpv, pcitag_t tag) 113{ 114 return PCI_CONFIG_SPACE_SIZE; 115} 116 117pcireg_t 118apecs_conf_read(cpv, tag, offset) 119 void *cpv; 120 pcitag_t tag; 121 int offset; 122{ 123 struct apecs_config *acp = cpv; 124 pcireg_t *datap, data; 125 int s, secondary, ba; 126 int32_t old_haxr2; /* XXX */ 127 128 s = 0; /* XXX gcc -Wuninitialized */ 129 old_haxr2 = 0; /* XXX gcc -Wuninitialized */ 130 131 /* secondary if bus # != 0 */ 132 pci_decompose_tag(&acp->ac_pc, tag, &secondary, NULL, NULL); 133 if (secondary) { 134 s = splhigh(); 135 old_haxr2 = REGVAL(EPIC_HAXR2); 136 alpha_mb(); 137 REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1; 138 alpha_mb(); 139 } 140 141 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF | 142 tag << 5UL | /* XXX */ 143 (offset & ~0x03) << 5 | /* XXX */ 144 0 << 5 | /* XXX */ 145 0x3 << 3); /* XXX */ 146 data = (pcireg_t)-1; 147 if (!(ba = badaddr(datap, sizeof *datap))) 148 data = *datap; 149 150 if (secondary) { 151 alpha_mb(); 152 REGVAL(EPIC_HAXR2) = old_haxr2; 153 alpha_mb(); 154 splx(s); 155 } 156 157#if 0 158 printf("apecs_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg, 159 data, datap, ba ? " (badaddr)" : ""); 160#endif 161 162 return data; 163} 164 165void 166apecs_conf_write(cpv, tag, offset, data) 167 void *cpv; 168 pcitag_t tag; 169 int offset; 170 pcireg_t data; 171{ 172 struct apecs_config *acp = cpv; 173 pcireg_t *datap; 174 int s, secondary; 175 int32_t old_haxr2; /* XXX */ 176 177 s = 0; /* XXX gcc -Wuninitialized */ 178 old_haxr2 = 0; /* XXX gcc -Wuninitialized */ 179 180 /* secondary if bus # != 0 */ 181 pci_decompose_tag(&acp->ac_pc, tag, &secondary, NULL, NULL); 182 if (secondary) { 183 s = splhigh(); 184 old_haxr2 = REGVAL(EPIC_HAXR2); 185 alpha_mb(); 186 REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1; 187 alpha_mb(); 188 } 189 190 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF | 191 tag << 5UL | /* XXX */ 192 (offset & ~0x03) << 5 | /* XXX */ 193 0 << 5 | /* XXX */ 194 0x3 << 3); /* XXX */ 195 196 alpha_mb(); 197 *datap = data; 198 alpha_mb(); 199 alpha_mb(); 200 201 if (secondary) { 202 alpha_mb(); 203 REGVAL(EPIC_HAXR2) = old_haxr2; 204 alpha_mb(); 205 splx(s); 206 } 207 208#if 0 209 printf("apecs_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag, 210 reg, data, datap); 211#endif 212} 213