apecs_pci.c revision 1.17
1 /* $NetBSD: apecs_pci.c,v 1.17 1999/06/29 17:10:57 ross 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 <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 31 32 __KERNEL_RCSID(0, "$NetBSD: apecs_pci.c,v 1.17 1999/06/29 17:10:57 ross Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/device.h> 38 #include <vm/vm.h> 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 45 void apecs_attach_hook __P((struct device *, struct device *, 46 struct pcibus_attach_args *)); 47 int apecs_bus_maxdevs __P((void *, int)); 48 pcitag_t apecs_make_tag __P((void *, int, int, int)); 49 void apecs_decompose_tag __P((void *, pcitag_t, int *, int *, 50 int *)); 51 pcireg_t apecs_conf_read __P((void *, pcitag_t, int)); 52 void apecs_conf_write __P((void *, pcitag_t, int, pcireg_t)); 53 54 void 55 apecs_pci_init(pc, v) 56 pci_chipset_tag_t pc; 57 void *v; 58 { 59 60 pc->pc_conf_v = v; 61 pc->pc_attach_hook = apecs_attach_hook; 62 pc->pc_bus_maxdevs = apecs_bus_maxdevs; 63 pc->pc_make_tag = apecs_make_tag; 64 pc->pc_decompose_tag = apecs_decompose_tag; 65 pc->pc_conf_read = apecs_conf_read; 66 pc->pc_conf_write = apecs_conf_write; 67 } 68 69 void 70 apecs_attach_hook(parent, self, pba) 71 struct device *parent, *self; 72 struct pcibus_attach_args *pba; 73 { 74 } 75 76 int 77 apecs_bus_maxdevs(cpv, busno) 78 void *cpv; 79 int busno; 80 { 81 82 return 32; 83 } 84 85 pcitag_t 86 apecs_make_tag(cpv, b, d, f) 87 void *cpv; 88 int b, d, f; 89 { 90 91 return (b << 16) | (d << 11) | (f << 8); 92 } 93 94 void 95 apecs_decompose_tag(cpv, tag, bp, dp, fp) 96 void *cpv; 97 pcitag_t tag; 98 int *bp, *dp, *fp; 99 { 100 101 if (bp != NULL) 102 *bp = (tag >> 16) & 0xff; 103 if (dp != NULL) 104 *dp = (tag >> 11) & 0x1f; 105 if (fp != NULL) 106 *fp = (tag >> 8) & 0x7; 107 } 108 109 pcireg_t 110 apecs_conf_read(cpv, tag, offset) 111 void *cpv; 112 pcitag_t tag; 113 int offset; 114 { 115 struct apecs_config *acp = cpv; 116 pcireg_t *datap, data; 117 int s, secondary, ba; 118 int32_t old_haxr2; /* XXX */ 119 120 s = 0; /* XXX gcc -Wuninitialized */ 121 old_haxr2 = 0; /* XXX gcc -Wuninitialized */ 122 123 /* secondary if bus # != 0 */ 124 alpha_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 s = 0; /* XXX gcc -Wuninitialized */ 170 old_haxr2 = 0; /* XXX gcc -Wuninitialized */ 171 172 /* secondary if bus # != 0 */ 173 alpha_pci_decompose_tag(&acp->ac_pc, tag, &secondary, 0, 0); 174 if (secondary) { 175 s = splhigh(); 176 old_haxr2 = REGVAL(EPIC_HAXR2); 177 alpha_mb(); 178 REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1; 179 alpha_mb(); 180 } 181 182 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF | 183 tag << 5UL | /* XXX */ 184 (offset & ~0x03) << 5 | /* XXX */ 185 0 << 5 | /* XXX */ 186 0x3 << 3); /* XXX */ 187 188 alpha_mb(); 189 *datap = data; 190 alpha_mb(); 191 alpha_mb(); 192 193 if (secondary) { 194 alpha_mb(); 195 REGVAL(EPIC_HAXR2) = old_haxr2; 196 alpha_mb(); 197 splx(s); 198 } 199 200 #if 0 201 printf("apecs_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag, 202 reg, data, datap); 203 #endif 204 } 205
Indexes created Fri Sep 26 08:10:20 GMT 2025