1 /* $OpenBSD: lca_pci.c,v 1.10 2010/12/04 17:06:31 miod 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 int lca_conf_size(void *, pcitag_t); 52 pcireg_t lca_conf_read(void *, pcitag_t, int); 53 void lca_conf_write(void *, pcitag_t, int, pcireg_t); 54 55 void 56 lca_pci_init(pc, v) 57 pci_chipset_tag_t pc; 58 void *v; 59 { 60 61 pc->pc_conf_v = v; 62 pc->pc_attach_hook = lca_attach_hook; 63 pc->pc_bus_maxdevs = lca_bus_maxdevs; 64 pc->pc_make_tag = lca_make_tag; 65 pc->pc_decompose_tag = lca_decompose_tag; 66 pc->pc_conf_size = lca_conf_size; 67 pc->pc_conf_read = lca_conf_read; 68 pc->pc_conf_write = lca_conf_write; 69 } 70 71 void 72 lca_attach_hook(parent, self, pba) 73 struct device *parent, *self; 74 struct pcibus_attach_args *pba; 75 { 76 } 77 78 int 79 lca_bus_maxdevs(cpv, busno) 80 void *cpv; 81 int busno; 82 { 83 84 if (busno == 0) 85 return 16; 86 else 87 return 32; 88 } 89 90 pcitag_t 91 lca_make_tag(cpv, b, d, f) 92 void *cpv; 93 int b, d, f; 94 { 95 96 return (b << 16) | (d << 11) | (f << 8); 97 } 98 99 void 100 lca_decompose_tag(cpv, tag, bp, dp, fp) 101 void *cpv; 102 pcitag_t tag; 103 int *bp, *dp, *fp; 104 { 105 106 if (bp != NULL) 107 *bp = (tag >> 16) & 0xff; 108 if (dp != NULL) 109 *dp = (tag >> 11) & 0x1f; 110 if (fp != NULL) 111 *fp = (tag >> 8) & 0x7; 112 } 113 114 int 115 lca_conf_size(void *cpv, pcitag_t tag) 116 { 117 return PCI_CONFIG_SPACE_SIZE; 118 } 119 120 pcireg_t 121 lca_conf_read(cpv, tag, offset) 122 void *cpv; 123 pcitag_t tag; 124 int offset; 125 { 126 struct lca_config *lcp = cpv; 127 pcireg_t *datap, data; 128 int s, secondary, device, ba; 129 130 s = 0; /* XXX gcc -Wuninitialized */ 131 132 /* secondary if bus # != 0 */ 133 pci_decompose_tag(&lcp->lc_pc, tag, &secondary, &device, 0); 134 if (secondary) { 135 s = splhigh(); 136 alpha_mb(); 137 REGVAL(LCA_IOC_CONF) = 0x01; 138 alpha_mb(); 139 } else { 140 /* 141 * on the LCA, must frob the tag used for 142 * devices on the primary bus, in the same ways 143 * as is used by type 1 configuration cycles 144 * on PCs. 145 */ 146 tag = (1 << (device + 11)) | (tag & 0x7ff); 147 } 148 149 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(LCA_PCI_CONF | 150 tag << 5UL | /* XXX */ 151 (offset & ~0x03) << 5 | /* XXX */ 152 0 << 5 | /* XXX */ 153 0x3 << 3); /* XXX */ 154 data = (pcireg_t)-1; 155 if (!(ba = badaddr(datap, sizeof *datap))) 156 data = *datap; 157 158 if (secondary) { 159 alpha_mb(); 160 REGVAL(LCA_IOC_CONF) = 0x00; 161 alpha_mb(); 162 splx(s); 163 } 164 165 #if 0 166 printf("lca_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg, 167 data, datap, ba ? " (badaddr)" : ""); 168 #endif 169 170 return data; 171 } 172 173 void 174 lca_conf_write(cpv, tag, offset, data) 175 void *cpv; 176 pcitag_t tag; 177 int offset; 178 pcireg_t data; 179 { 180 struct lca_config *lcp = cpv; 181 pcireg_t *datap; 182 int s, secondary, device; 183 184 s = 0; /* XXX gcc -Wuninitialized */ 185 186 /* secondary if bus # != 0 */ 187 pci_decompose_tag(&lcp->lc_pc, tag, &secondary, &device, 0); 188 if (secondary) { 189 s = splhigh(); 190 alpha_mb(); 191 REGVAL(LCA_IOC_CONF) = 0x01; 192 alpha_mb(); 193 } else { 194 /* 195 * on the LCA, must frob the tag used for 196 * devices on the primary bus, in the same ways 197 * as is used by type 1 configuration cycles 198 * on PCs. 199 */ 200 tag = (1 << (device + 11)) | (tag & 0x7ff); 201 } 202 203 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(LCA_PCI_CONF | 204 tag << 5UL | /* XXX */ 205 (offset & ~0x03) << 5 | /* XXX */ 206 0 << 5 | /* XXX */ 207 0x3 << 3); /* XXX */ 208 *datap = data; 209 210 if (secondary) { 211 alpha_mb(); 212 REGVAL(LCA_IOC_CONF) = 0x00; 213 alpha_mb(); 214 splx(s); 215 } 216 217 #if 0 218 printf("lca_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag, 219 reg, data, datap); 220 #endif 221 } 222