1 /* $OpenBSD: lca_pci.c,v 1.9 2006/03/26 20:23:08 brad Exp $ */ 2 /* $NetBSD: lca_pci.c,v 1.13 1997/09/02 13:19:35 thorpej 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/lcareg.h> 43 #include <alpha/pci/lcavar.h> 44 45 void lca_attach_hook(struct device *, struct device *, 46 struct pcibus_attach_args *); 47 int lca_bus_maxdevs(void *, int); 48 pcitag_t lca_make_tag(void *, int, int, int); 49 void lca_decompose_tag(void *, pcitag_t, int *, int *, 50 int *); 51 pcireg_t lca_conf_read(void *, pcitag_t, int); 52 void lca_conf_write(void *, pcitag_t, int, pcireg_t); 53 54 void 55 lca_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 = lca_attach_hook; 62 pc->pc_bus_maxdevs = lca_bus_maxdevs; 63 pc->pc_make_tag = lca_make_tag; 64 pc->pc_decompose_tag = lca_decompose_tag; 65 pc->pc_conf_read = lca_conf_read; 66 pc->pc_conf_write = lca_conf_write; 67 } 68 69 void 70 lca_attach_hook(parent, self, pba) 71 struct device *parent, *self; 72 struct pcibus_attach_args *pba; 73 { 74 } 75 76 int 77 lca_bus_maxdevs(cpv, busno) 78 void *cpv; 79 int busno; 80 { 81 82 if (busno == 0) 83 return 16; 84 else 85 return 32; 86 } 87 88 pcitag_t 89 lca_make_tag(cpv, b, d, f) 90 void *cpv; 91 int b, d, f; 92 { 93 94 return (b << 16) | (d << 11) | (f << 8); 95 } 96 97 void 98 lca_decompose_tag(cpv, tag, bp, dp, fp) 99 void *cpv; 100 pcitag_t tag; 101 int *bp, *dp, *fp; 102 { 103 104 if (bp != NULL) 105 *bp = (tag >> 16) & 0xff; 106 if (dp != NULL) 107 *dp = (tag >> 11) & 0x1f; 108 if (fp != NULL) 109 *fp = (tag >> 8) & 0x7; 110 } 111 112 pcireg_t 113 lca_conf_read(cpv, tag, offset) 114 void *cpv; 115 pcitag_t tag; 116 int offset; 117 { 118 struct lca_config *lcp = cpv; 119 pcireg_t *datap, data; 120 int s, secondary, device, ba; 121 122 s = 0; /* XXX gcc -Wuninitialized */ 123 124 /* secondary if bus # != 0 */ 125 pci_decompose_tag(&lcp->lc_pc, tag, &secondary, &device, 0); 126 if (secondary) { 127 s = splhigh(); 128 alpha_mb(); 129 REGVAL(LCA_IOC_CONF) = 0x01; 130 alpha_mb(); 131 } else { 132 /* 133 * on the LCA, must frob the tag used for 134 * devices on the primary bus, in the same ways 135 * as is used by type 1 configuration cycles 136 * on PCs. 137 */ 138 tag = (1 << (device + 11)) | (tag & 0x7ff); 139 } 140 141 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(LCA_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(LCA_IOC_CONF) = 0x00; 153 alpha_mb(); 154 splx(s); 155 } 156 157 #if 0 158 printf("lca_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 } 164 165 void 166 lca_conf_write(cpv, tag, offset, data) 167 void *cpv; 168 pcitag_t tag; 169 int offset; 170 pcireg_t data; 171 { 172 struct lca_config *lcp = cpv; 173 pcireg_t *datap; 174 int s, secondary, device; 175 176 s = 0; /* XXX gcc -Wuninitialized */ 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