1 /* $NetBSD: apecs_pci.c,v 1.7 1996/07/09 00:54:31 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@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/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/device.h> 34 #include <vm/vm.h> 35 36 #include <dev/pci/pcireg.h> 37 #include <dev/pci/pcivar.h> 38 #include <alpha/pci/apecsreg.h> 39 #include <alpha/pci/apecsvar.h> 40 41 void apecs_attach_hook __P((struct device *, struct device *, 42 struct pcibus_attach_args *)); 43 int apecs_bus_maxdevs __P((void *, int)); 44 pcitag_t apecs_make_tag __P((void *, int, int, int)); 45 void apecs_decompose_tag __P((void *, pcitag_t, int *, int *, 46 int *)); 47 pcireg_t apecs_conf_read __P((void *, pcitag_t, int)); 48 void apecs_conf_write __P((void *, pcitag_t, int, pcireg_t)); 49 50 void 51 apecs_pci_init(pc, v) 52 pci_chipset_tag_t pc; 53 void *v; 54 { 55 56 pc->pc_conf_v = v; 57 pc->pc_attach_hook = apecs_attach_hook; 58 pc->pc_bus_maxdevs = apecs_bus_maxdevs; 59 pc->pc_make_tag = apecs_make_tag; 60 pc->pc_decompose_tag = apecs_decompose_tag; 61 pc->pc_conf_read = apecs_conf_read; 62 pc->pc_conf_write = apecs_conf_write; 63 } 64 65 void 66 apecs_attach_hook(parent, self, pba) 67 struct device *parent, *self; 68 struct pcibus_attach_args *pba; 69 { 70 } 71 72 int 73 apecs_bus_maxdevs(cpv, busno) 74 void *cpv; 75 int busno; 76 { 77 78 return 32; 79 } 80 81 pcitag_t 82 apecs_make_tag(cpv, b, d, f) 83 void *cpv; 84 int b, d, f; 85 { 86 87 return (b << 16) | (d << 11) | (f << 8); 88 } 89 90 void 91 apecs_decompose_tag(cpv, tag, bp, dp, fp) 92 void *cpv; 93 pcitag_t tag; 94 int *bp, *dp, *fp; 95 { 96 97 if (bp != NULL) 98 *bp = (tag >> 16) & 0xff; 99 if (dp != NULL) 100 *dp = (tag >> 11) & 0x1f; 101 if (fp != NULL) 102 *fp = (tag >> 8) & 0x7; 103 } 104 105 pcireg_t 106 apecs_conf_read(cpv, tag, offset) 107 void *cpv; 108 pcitag_t tag; 109 int offset; 110 { 111 struct apecs_config *acp = cpv; 112 pcireg_t *datap, data; 113 int s, secondary, ba; 114 int32_t old_haxr2; /* XXX */ 115 116 /* secondary if bus # != 0 */ 117 pci_decompose_tag(&acp->ac_pc, tag, &secondary, 0, 0); 118 if (secondary) { 119 s = splhigh(); 120 old_haxr2 = REGVAL(EPIC_HAXR2); 121 alpha_mb(); 122 REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1; 123 alpha_mb(); 124 } 125 126 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF | 127 tag << 5UL | /* XXX */ 128 (offset & ~0x03) << 5 | /* XXX */ 129 0 << 5 | /* XXX */ 130 0x3 << 3); /* XXX */ 131 data = (pcireg_t)-1; 132 if (!(ba = badaddr(datap, sizeof *datap))) 133 data = *datap; 134 135 if (secondary) { 136 alpha_mb(); 137 REGVAL(EPIC_HAXR2) = old_haxr2; 138 alpha_mb(); 139 splx(s); 140 } 141 142 #if 0 143 printf("apecs_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg, 144 data, datap, ba ? " (badaddr)" : ""); 145 #endif 146 147 return data; 148 } 149 150 void 151 apecs_conf_write(cpv, tag, offset, data) 152 void *cpv; 153 pcitag_t tag; 154 int offset; 155 pcireg_t data; 156 { 157 struct apecs_config *acp = cpv; 158 pcireg_t *datap; 159 int s, secondary; 160 int32_t old_haxr2; /* XXX */ 161 162 /* secondary if bus # != 0 */ 163 pci_decompose_tag(&acp->ac_pc, tag, &secondary, 0, 0); 164 if (secondary) { 165 s = splhigh(); 166 old_haxr2 = REGVAL(EPIC_HAXR2); 167 alpha_mb(); 168 REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1; 169 alpha_mb(); 170 } 171 172 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF | 173 tag << 5UL | /* XXX */ 174 (offset & ~0x03) << 5 | /* XXX */ 175 0 << 5 | /* XXX */ 176 0x3 << 3); /* XXX */ 177 *datap = data; 178 179 if (secondary) { 180 alpha_mb(); 181 REGVAL(EPIC_HAXR2) = old_haxr2; 182 alpha_mb(); 183 splx(s); 184 } 185 186 #if 0 187 printf("apecs_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag, 188 reg, data, datap); 189 #endif 190 } 191