1 /* $NetBSD: lca_pci.c,v 1.18 2009/03/14 21:04:02 dsl 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/cdefs.h> /* RCS ID & Copyright macro defns */ 31 32 __KERNEL_RCSID(0, "$NetBSD: lca_pci.c,v 1.18 2009/03/14 21:04:02 dsl Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/device.h> 38 39 #include <uvm/uvm_extern.h> 40 41 #include <dev/pci/pcireg.h> 42 #include <dev/pci/pcivar.h> 43 #include <alpha/pci/lcareg.h> 44 #include <alpha/pci/lcavar.h> 45 46 void lca_attach_hook(struct device *, struct device *, 47 struct pcibus_attach_args *); 48 int lca_bus_maxdevs(void *, int); 49 pcitag_t lca_make_tag(void *, int, int, int); 50 void lca_decompose_tag(void *, pcitag_t, int *, int *, 51 int *); 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(pci_chipset_tag_t pc, void *v) 57 { 58 59 pc->pc_conf_v = v; 60 pc->pc_attach_hook = lca_attach_hook; 61 pc->pc_bus_maxdevs = lca_bus_maxdevs; 62 pc->pc_make_tag = lca_make_tag; 63 pc->pc_decompose_tag = lca_decompose_tag; 64 pc->pc_conf_read = lca_conf_read; 65 pc->pc_conf_write = lca_conf_write; 66 } 67 68 void 69 lca_attach_hook(struct device *parent, struct device *self, struct pcibus_attach_args *pba) 70 { 71 } 72 73 int 74 lca_bus_maxdevs(void *cpv, int busno) 75 { 76 77 if (busno == 0) 78 return 16; 79 else 80 return 32; 81 } 82 83 pcitag_t 84 lca_make_tag(void *cpv, int b, int d, int f) 85 { 86 87 return (b << 16) | (d << 11) | (f << 8); 88 } 89 90 void 91 lca_decompose_tag(void *cpv, pcitag_t tag, int *bp, int *dp, int *fp) 92 { 93 94 if (bp != NULL) 95 *bp = (tag >> 16) & 0xff; 96 if (dp != NULL) 97 *dp = (tag >> 11) & 0x1f; 98 if (fp != NULL) 99 *fp = (tag >> 8) & 0x7; 100 } 101 102 pcireg_t 103 lca_conf_read(void *cpv, pcitag_t tag, int offset) 104 { 105 struct lca_config *lcp = cpv; 106 pcireg_t *datap, data; 107 int s, secondary, device, ba; 108 109 s = 0; /* XXX gcc -Wuninitialized */ 110 111 /* secondary if bus # != 0 */ 112 pci_decompose_tag(&lcp->lc_pc, tag, &secondary, &device, 0); 113 if (secondary) { 114 s = splhigh(); 115 alpha_mb(); 116 REGVAL(LCA_IOC_CONF) = 0x01; 117 alpha_mb(); 118 } else { 119 /* 120 * on the LCA, must frob the tag used for 121 * devices on the primary bus, in the same ways 122 * as is used by type 1 configuration cycles 123 * on PCs. 124 */ 125 tag = (1 << (device + 11)) | (tag & 0x7ff); 126 } 127 128 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(LCA_PCI_CONF | 129 tag << 5UL | /* XXX */ 130 (offset & ~0x03) << 5 | /* XXX */ 131 0 << 5 | /* XXX */ 132 0x3 << 3); /* XXX */ 133 data = (pcireg_t)-1; 134 if (!(ba = badaddr(datap, sizeof *datap))) 135 data = *datap; 136 137 if (secondary) { 138 alpha_mb(); 139 REGVAL(LCA_IOC_CONF) = 0x00; 140 alpha_mb(); 141 splx(s); 142 } 143 144 #if 0 145 printf("lca_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg, 146 data, datap, ba ? " (badaddr)" : ""); 147 #endif 148 149 return data; 150 } 151 152 void 153 lca_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data) 154 { 155 struct lca_config *lcp = cpv; 156 pcireg_t *datap; 157 int s, secondary, device; 158 159 s = 0; /* XXX gcc -Wuninitialized */ 160 161 /* secondary if bus # != 0 */ 162 pci_decompose_tag(&lcp->lc_pc, tag, &secondary, &device, 0); 163 if (secondary) { 164 s = splhigh(); 165 alpha_mb(); 166 REGVAL(LCA_IOC_CONF) = 0x01; 167 alpha_mb(); 168 } else { 169 /* 170 * on the LCA, must frob the tag used for 171 * devices on the primary bus, in the same ways 172 * as is used by type 1 configuration cycles 173 * on PCs. 174 */ 175 tag = (1 << (device + 11)) | (tag & 0x7ff); 176 } 177 178 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(LCA_PCI_CONF | 179 tag << 5UL | /* XXX */ 180 (offset & ~0x03) << 5 | /* XXX */ 181 0 << 5 | /* XXX */ 182 0x3 << 3); /* XXX */ 183 *datap = data; 184 185 if (secondary) { 186 alpha_mb(); 187 REGVAL(LCA_IOC_CONF) = 0x00; 188 alpha_mb(); 189 splx(s); 190 } 191 192 #if 0 193 printf("lca_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag, 194 reg, data, datap); 195 #endif 196 } 197