1/* $OpenBSD: lca_pci.c,v 1.12 2015/10/30 07:51:49 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 45void lca_attach_hook(struct device *, struct device *, 46 struct pcibus_attach_args *); 47int lca_bus_maxdevs(void *, int); 48pcitag_t lca_make_tag(void *, int, int, int); 49void lca_decompose_tag(void *, pcitag_t, int *, int *, 50 int *); 51int lca_conf_size(void *, pcitag_t); 52pcireg_t lca_conf_read(void *, pcitag_t, int); 53void lca_conf_write(void *, pcitag_t, int, pcireg_t); 54 55void 56lca_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 71void 72lca_attach_hook(parent, self, pba) 73 struct device *parent, *self; 74 struct pcibus_attach_args *pba; 75{ 76} 77 78int 79lca_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 90pcitag_t 91lca_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 99void 100lca_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 114int 115lca_conf_size(void *cpv, pcitag_t tag) 116{ 117 return PCI_CONFIG_SPACE_SIZE; 118} 119 120pcireg_t 121lca_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 alpha_mb(); 133 REGVAL64(LCA_IOC_STAT0) = REGVAL64(LCA_IOC_STAT0); 134 alpha_mb(); 135 136 /* secondary if bus # != 0 */ 137 pci_decompose_tag(&lcp->lc_pc, tag, &secondary, &device, NULL); 138 if (secondary) { 139 s = splhigh(); 140 alpha_mb(); 141 REGVAL(LCA_IOC_CONF) = 0x01; 142 alpha_mb(); 143 } else { 144 /* 145 * on the LCA, must frob the tag used for 146 * devices on the primary bus, in the same ways 147 * as is used by type 1 configuration cycles 148 * on PCs. 149 */ 150 tag = (1 << (device + 11)) | (tag & 0x7ff); 151 } 152 153 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(LCA_PCI_CONF | 154 tag << 5UL | /* XXX */ 155 (offset & ~0x03) << 5 | /* XXX */ 156 0 << 5 | /* XXX */ 157 0x3 << 3); /* XXX */ 158 data = (pcireg_t)-1; 159 if (!(ba = badaddr(datap, sizeof *datap))) { 160 if (REGVAL64(LCA_IOC_STAT0) & IOC_STAT0_ERR) { 161 alpha_mb(); 162 REGVAL64(LCA_IOC_STAT0) = REGVAL64(LCA_IOC_STAT0); 163 alpha_mb(); 164 } else 165 data = *datap; 166 } 167 168 if (secondary) { 169 alpha_mb(); 170 REGVAL(LCA_IOC_CONF) = 0x00; 171 alpha_mb(); 172 splx(s); 173 } 174 175#if 0 176 printf("lca_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg, 177 data, datap, ba ? " (badaddr)" : ""); 178#endif 179 180 return data; 181} 182 183void 184lca_conf_write(cpv, tag, offset, data) 185 void *cpv; 186 pcitag_t tag; 187 int offset; 188 pcireg_t data; 189{ 190 struct lca_config *lcp = cpv; 191 pcireg_t *datap; 192 int s, secondary, device; 193 194 s = 0; /* XXX gcc -Wuninitialized */ 195 196 /* secondary if bus # != 0 */ 197 pci_decompose_tag(&lcp->lc_pc, tag, &secondary, &device, NULL); 198 if (secondary) { 199 s = splhigh(); 200 alpha_mb(); 201 REGVAL(LCA_IOC_CONF) = 0x01; 202 alpha_mb(); 203 } else { 204 /* 205 * on the LCA, must frob the tag used for 206 * devices on the primary bus, in the same ways 207 * as is used by type 1 configuration cycles 208 * on PCs. 209 */ 210 tag = (1 << (device + 11)) | (tag & 0x7ff); 211 } 212 213 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(LCA_PCI_CONF | 214 tag << 5UL | /* XXX */ 215 (offset & ~0x03) << 5 | /* XXX */ 216 0 << 5 | /* XXX */ 217 0x3 << 3); /* XXX */ 218 *datap = data; 219 220 if (secondary) { 221 alpha_mb(); 222 REGVAL(LCA_IOC_CONF) = 0x00; 223 alpha_mb(); 224 splx(s); 225 } 226 227#if 0 228 printf("lca_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag, 229 reg, data, datap); 230#endif 231} 232