1 /* $NetBSD: lca_pci.c,v 1.7 1996/11/13 21:13:28 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/lcareg.h> 39 #include <alpha/pci/lcavar.h> 40 41 void lca_attach_hook __P((struct device *, struct device *, 42 struct pcibus_attach_args *)); 43 int lca_bus_maxdevs __P((void *, int)); 44 pcitag_t lca_make_tag __P((void *, int, int, int)); 45 void lca_decompose_tag __P((void *, pcitag_t, int *, int *, 46 int *)); 47 pcireg_t lca_conf_read __P((void *, pcitag_t, int)); 48 void lca_conf_write __P((void *, pcitag_t, int, pcireg_t)); 49 50 void 51 lca_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 = lca_attach_hook; 58 pc->pc_bus_maxdevs = lca_bus_maxdevs; 59 pc->pc_make_tag = lca_make_tag; 60 pc->pc_decompose_tag = lca_decompose_tag; 61 pc->pc_conf_read = lca_conf_read; 62 pc->pc_conf_write = lca_conf_write; 63 } 64 65 void 66 lca_attach_hook(parent, self, pba) 67 struct device *parent, *self; 68 struct pcibus_attach_args *pba; 69 { 70 } 71 72 int 73 lca_bus_maxdevs(cpv, busno) 74 void *cpv; 75 int busno; 76 { 77 78 if (busno == 0) 79 return 16; 80 else 81 return 32; 82 } 83 84 pcitag_t 85 lca_make_tag(cpv, b, d, f) 86 void *cpv; 87 int b, d, f; 88 { 89 90 return (b << 16) | (d << 11) | (f << 8); 91 } 92 93 void 94 lca_decompose_tag(cpv, tag, bp, dp, fp) 95 void *cpv; 96 pcitag_t tag; 97 int *bp, *dp, *fp; 98 { 99 100 if (bp != NULL) 101 *bp = (tag >> 16) & 0xff; 102 if (dp != NULL) 103 *dp = (tag >> 11) & 0x1f; 104 if (fp != NULL) 105 *fp = (tag >> 8) & 0x7; 106 } 107 108 pcireg_t 109 lca_conf_read(cpv, tag, offset) 110 void *cpv; 111 pcitag_t tag; 112 int offset; 113 { 114 struct lca_config *lcp = cpv; 115 pcireg_t *datap, data; 116 int s, secondary, device, ba; 117 118 #ifdef DIAGNOSTIC 119 s = 0; /* XXX gcc -Wuninitialized */ 120 #endif 121 122 /* secondary if bus # != 0 */ 123 pci_decompose_tag(&lcp->lc_pc, tag, &secondary, &device, 0); 124 if (secondary) { 125 s = splhigh(); 126 alpha_mb(); 127 REGVAL(LCA_IOC_CONF) = 0x01; 128 alpha_mb(); 129 } else { 130 /* 131 * on the LCA, must frob the tag used for 132 * devices on the primary bus, in the same ways 133 * as is used by type 1 configuration cycles 134 * on PCs. 135 */ 136 tag = (1 << (device + 11)) | (tag & 0x7ff); 137 } 138 139 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(LCA_PCI_CONF | 140 tag << 5UL | /* XXX */ 141 (offset & ~0x03) << 5 | /* XXX */ 142 0 << 5 | /* XXX */ 143 0x3 << 3); /* XXX */ 144 data = (pcireg_t)-1; 145 if (!(ba = badaddr(datap, sizeof *datap))) 146 data = *datap; 147 148 if (secondary) { 149 alpha_mb(); 150 REGVAL(LCA_IOC_CONF) = 0x00; 151 alpha_mb(); 152 splx(s); 153 } 154 155 #if 0 156 printf("lca_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg, 157 data, datap, ba ? " (badaddr)" : ""); 158 #endif 159 160 return data; 161 } 162 163 void 164 lca_conf_write(cpv, tag, offset, data) 165 void *cpv; 166 pcitag_t tag; 167 int offset; 168 pcireg_t data; 169 { 170 struct lca_config *lcp = cpv; 171 pcireg_t *datap; 172 int s, secondary, device; 173 174 #ifdef DIAGNOSTIC 175 s = 0; /* XXX gcc -Wuninitialized */ 176 #endif 177 178 /* secondary if bus # != 0 */ 179 pci_decompose_tag(&lcp->lc_pc, tag, &secondary, &device, 0); 180 if (secondary) { 181 s = splhigh(); 182 alpha_mb(); 183 REGVAL(LCA_IOC_CONF) = 0x01; 184 alpha_mb(); 185 } else { 186 /* 187 * on the LCA, must frob the tag used for 188 * devices on the primary bus, in the same ways 189 * as is used by type 1 configuration cycles 190 * on PCs. 191 */ 192 tag = (1 << (device + 11)) | (tag & 0x7ff); 193 } 194 195 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(LCA_PCI_CONF | 196 tag << 5UL | /* XXX */ 197 (offset & ~0x03) << 5 | /* XXX */ 198 0 << 5 | /* XXX */ 199 0x3 << 3); /* XXX */ 200 *datap = data; 201 202 if (secondary) { 203 alpha_mb(); 204 REGVAL(LCA_IOC_CONF) = 0x00; 205 alpha_mb(); 206 splx(s); 207 } 208 209 #if 0 210 printf("lca_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag, 211 reg, data, datap); 212 #endif 213 } 214