apecs_pci.c revision 1.12
1 /* $NetBSD: apecs_pci.c,v 1.12 1997/04/07 05:46:48 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 #include <machine/options.h> /* Pull in config options headers */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/device.h> 36 #include <vm/vm.h> 37 38 #include <dev/pci/pcireg.h> 39 #include <dev/pci/pcivar.h> 40 #include <alpha/pci/apecsreg.h> 41 #include <alpha/pci/apecsvar.h> 42 43 void apecs_attach_hook __P((struct device *, struct device *, 44 struct pcibus_attach_args *)); 45 int apecs_bus_maxdevs __P((void *, int)); 46 pcitag_t apecs_make_tag __P((void *, int, int, int)); 47 void apecs_decompose_tag __P((void *, pcitag_t, int *, int *, 48 int *)); 49 pcireg_t apecs_conf_read __P((void *, pcitag_t, int)); 50 void apecs_conf_write __P((void *, pcitag_t, int, pcireg_t)); 51 52 void 53 apecs_pci_init(pc, v) 54 pci_chipset_tag_t pc; 55 void *v; 56 { 57 58 pc->pc_conf_v = v; 59 pc->pc_attach_hook = apecs_attach_hook; 60 pc->pc_bus_maxdevs = apecs_bus_maxdevs; 61 pc->pc_make_tag = apecs_make_tag; 62 pc->pc_decompose_tag = apecs_decompose_tag; 63 pc->pc_conf_read = apecs_conf_read; 64 pc->pc_conf_write = apecs_conf_write; 65 } 66 67 void 68 apecs_attach_hook(parent, self, pba) 69 struct device *parent, *self; 70 struct pcibus_attach_args *pba; 71 { 72 } 73 74 int 75 apecs_bus_maxdevs(cpv, busno) 76 void *cpv; 77 int busno; 78 { 79 80 return 32; 81 } 82 83 pcitag_t 84 apecs_make_tag(cpv, b, d, f) 85 void *cpv; 86 int b, d, f; 87 { 88 89 return (b << 16) | (d << 11) | (f << 8); 90 } 91 92 void 93 apecs_decompose_tag(cpv, tag, bp, dp, fp) 94 void *cpv; 95 pcitag_t tag; 96 int *bp, *dp, *fp; 97 { 98 99 if (bp != NULL) 100 *bp = (tag >> 16) & 0xff; 101 if (dp != NULL) 102 *dp = (tag >> 11) & 0x1f; 103 if (fp != NULL) 104 *fp = (tag >> 8) & 0x7; 105 } 106 107 pcireg_t 108 apecs_conf_read(cpv, tag, offset) 109 void *cpv; 110 pcitag_t tag; 111 int offset; 112 { 113 struct apecs_config *acp = cpv; 114 pcireg_t *datap, data; 115 int s, secondary, ba; 116 int32_t old_haxr2; /* XXX */ 117 118 #ifdef DIAGNOSTIC 119 s = 0; /* XXX gcc -Wuninitialized */ 120 old_haxr2 = 0; /* XXX gcc -Wuninitialized */ 121 #endif 122 123 /* secondary if bus # != 0 */ 124 pci_decompose_tag(&acp->ac_pc, tag, &secondary, 0, 0); 125 if (secondary) { 126 s = splhigh(); 127 old_haxr2 = REGVAL(EPIC_HAXR2); 128 alpha_mb(); 129 REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1; 130 alpha_mb(); 131 } 132 133 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF | 134 tag << 5UL | /* XXX */ 135 (offset & ~0x03) << 5 | /* XXX */ 136 0 << 5 | /* XXX */ 137 0x3 << 3); /* XXX */ 138 data = (pcireg_t)-1; 139 if (!(ba = badaddr(datap, sizeof *datap))) 140 data = *datap; 141 142 if (secondary) { 143 alpha_mb(); 144 REGVAL(EPIC_HAXR2) = old_haxr2; 145 alpha_mb(); 146 splx(s); 147 } 148 149 #if 0 150 printf("apecs_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg, 151 data, datap, ba ? " (badaddr)" : ""); 152 #endif 153 154 return data; 155 } 156 157 void 158 apecs_conf_write(cpv, tag, offset, data) 159 void *cpv; 160 pcitag_t tag; 161 int offset; 162 pcireg_t data; 163 { 164 struct apecs_config *acp = cpv; 165 pcireg_t *datap; 166 int s, secondary; 167 int32_t old_haxr2; /* XXX */ 168 169 #ifdef DIAGNOSTIC 170 s = 0; /* XXX gcc -Wuninitialized */ 171 old_haxr2 = 0; /* XXX gcc -Wuninitialized */ 172 #endif 173 174 /* secondary if bus # != 0 */ 175 pci_decompose_tag(&acp->ac_pc, tag, &secondary, 0, 0); 176 if (secondary) { 177 s = splhigh(); 178 old_haxr2 = REGVAL(EPIC_HAXR2); 179 alpha_mb(); 180 REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1; 181 alpha_mb(); 182 } 183 184 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF | 185 tag << 5UL | /* XXX */ 186 (offset & ~0x03) << 5 | /* XXX */ 187 0 << 5 | /* XXX */ 188 0x3 << 3); /* XXX */ 189 *datap = data; 190 191 if (secondary) { 192 alpha_mb(); 193 REGVAL(EPIC_HAXR2) = old_haxr2; 194 alpha_mb(); 195 splx(s); 196 } 197 198 #if 0 199 printf("apecs_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag, 200 reg, data, datap); 201 #endif 202 } 203
Indexes created Thu Sep 25 16:09:42 GMT 2025