cia_pci.c revision 1.15.2.2
1 1.15.2.2 thorpej /* $NetBSD: cia_pci.c,v 1.15.2.2 1997/09/15 22:35:55 thorpej Exp $ */ 2 1.15.2.2 thorpej 3 1.15.2.2 thorpej /* 4 1.15.2.2 thorpej * Copyright (c) 1995, 1996 Carnegie-Mellon University. 5 1.15.2.2 thorpej * All rights reserved. 6 1.15.2.2 thorpej * 7 1.15.2.2 thorpej * Author: Chris G. Demetriou 8 1.15.2.2 thorpej * 9 1.15.2.2 thorpej * Permission to use, copy, modify and distribute this software and 10 1.15.2.2 thorpej * its documentation is hereby granted, provided that both the copyright 11 1.15.2.2 thorpej * notice and this permission notice appear in all copies of the 12 1.15.2.2 thorpej * software, derivative works or modified versions, and any portions 13 1.15.2.2 thorpej * thereof, and that both notices appear in supporting documentation. 14 1.15.2.2 thorpej * 15 1.15.2.2 thorpej * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 1.15.2.2 thorpej * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 1.15.2.2 thorpej * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 1.15.2.2 thorpej * 19 1.15.2.2 thorpej * Carnegie Mellon requests users of this software to return to 20 1.15.2.2 thorpej * 21 1.15.2.2 thorpej * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 22 1.15.2.2 thorpej * School of Computer Science 23 1.15.2.2 thorpej * Carnegie Mellon University 24 1.15.2.2 thorpej * Pittsburgh PA 15213-3890 25 1.15.2.2 thorpej * 26 1.15.2.2 thorpej * any improvements or extensions that they make and grant Carnegie the 27 1.15.2.2 thorpej * rights to redistribute these changes. 28 1.15.2.2 thorpej */ 29 1.15.2.2 thorpej 30 1.15.2.2 thorpej #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 31 1.15.2.2 thorpej 32 1.15.2.2 thorpej __KERNEL_RCSID(0, "$NetBSD: cia_pci.c,v 1.15.2.2 1997/09/15 22:35:55 thorpej Exp $"); 33 1.15.2.2 thorpej 34 1.15.2.2 thorpej #include <sys/param.h> 35 1.15.2.2 thorpej #include <sys/systm.h> 36 1.15.2.2 thorpej #include <sys/kernel.h> 37 1.15.2.2 thorpej #include <sys/device.h> 38 1.15.2.2 thorpej #include <vm/vm.h> 39 1.15.2.2 thorpej 40 1.15.2.2 thorpej #include <dev/pci/pcireg.h> 41 1.15.2.2 thorpej #include <dev/pci/pcivar.h> 42 1.15.2.2 thorpej #include <alpha/pci/ciareg.h> 43 1.15.2.2 thorpej #include <alpha/pci/ciavar.h> 44 1.15.2.2 thorpej 45 1.15.2.2 thorpej void cia_attach_hook __P((struct device *, struct device *, 46 1.15.2.2 thorpej struct pcibus_attach_args *)); 47 1.15.2.2 thorpej int cia_bus_maxdevs __P((void *, int)); 48 1.15.2.2 thorpej pcitag_t cia_make_tag __P((void *, int, int, int)); 49 1.15.2.2 thorpej void cia_decompose_tag __P((void *, pcitag_t, int *, int *, 50 1.15.2.2 thorpej int *)); 51 1.15.2.2 thorpej pcireg_t cia_conf_read __P((void *, pcitag_t, int)); 52 1.15.2.2 thorpej void cia_conf_write __P((void *, pcitag_t, int, pcireg_t)); 53 1.15.2.2 thorpej 54 1.15.2.2 thorpej void 55 1.15.2.2 thorpej cia_pci_init(pc, v) 56 1.15.2.2 thorpej pci_chipset_tag_t pc; 57 1.15.2.2 thorpej void *v; 58 1.15.2.2 thorpej { 59 1.15.2.2 thorpej 60 1.15.2.2 thorpej pc->pc_conf_v = v; 61 1.15.2.2 thorpej pc->pc_attach_hook = cia_attach_hook; 62 1.15.2.2 thorpej pc->pc_bus_maxdevs = cia_bus_maxdevs; 63 1.15.2.2 thorpej pc->pc_make_tag = cia_make_tag; 64 1.15.2.2 thorpej pc->pc_decompose_tag = cia_decompose_tag; 65 1.15.2.2 thorpej pc->pc_conf_read = cia_conf_read; 66 1.15.2.2 thorpej pc->pc_conf_write = cia_conf_write; 67 1.15.2.2 thorpej } 68 1.15.2.2 thorpej 69 1.15.2.2 thorpej void 70 1.15.2.2 thorpej cia_attach_hook(parent, self, pba) 71 1.15.2.2 thorpej struct device *parent, *self; 72 1.15.2.2 thorpej struct pcibus_attach_args *pba; 73 1.15.2.2 thorpej { 74 1.15.2.2 thorpej } 75 1.15.2.2 thorpej 76 1.15.2.2 thorpej int 77 1.15.2.2 thorpej cia_bus_maxdevs(cpv, busno) 78 1.15.2.2 thorpej void *cpv; 79 1.15.2.2 thorpej int busno; 80 1.15.2.2 thorpej { 81 1.15.2.2 thorpej 82 1.15.2.2 thorpej return 32; 83 1.15.2.2 thorpej } 84 1.15.2.2 thorpej 85 1.15.2.2 thorpej pcitag_t 86 1.15.2.2 thorpej cia_make_tag(cpv, b, d, f) 87 1.15.2.2 thorpej void *cpv; 88 1.15.2.2 thorpej int b, d, f; 89 1.15.2.2 thorpej { 90 1.15.2.2 thorpej 91 1.15.2.2 thorpej return (b << 16) | (d << 11) | (f << 8); 92 1.15.2.2 thorpej } 93 1.15.2.2 thorpej 94 1.15.2.2 thorpej void 95 1.15.2.2 thorpej cia_decompose_tag(cpv, tag, bp, dp, fp) 96 1.15.2.2 thorpej void *cpv; 97 1.15.2.2 thorpej pcitag_t tag; 98 1.15.2.2 thorpej int *bp, *dp, *fp; 99 1.15.2.2 thorpej { 100 1.15.2.2 thorpej 101 1.15.2.2 thorpej if (bp != NULL) 102 1.15.2.2 thorpej *bp = (tag >> 16) & 0xff; 103 1.15.2.2 thorpej if (dp != NULL) 104 1.15.2.2 thorpej *dp = (tag >> 11) & 0x1f; 105 1.15.2.2 thorpej if (fp != NULL) 106 1.15.2.2 thorpej *fp = (tag >> 8) & 0x7; 107 1.15.2.2 thorpej } 108 1.15.2.2 thorpej 109 1.15.2.2 thorpej pcireg_t 110 1.15.2.2 thorpej cia_conf_read(cpv, tag, offset) 111 1.15.2.2 thorpej void *cpv; 112 1.15.2.2 thorpej pcitag_t tag; 113 1.15.2.2 thorpej int offset; 114 1.15.2.2 thorpej { 115 1.15.2.2 thorpej struct cia_config *ccp = cpv; 116 1.15.2.2 thorpej pcireg_t *datap, data; 117 1.15.2.2 thorpej int s, secondary, ba; 118 1.15.2.2 thorpej int32_t old_haxr2; /* XXX */ 119 1.15.2.2 thorpej 120 1.15.2.2 thorpej #ifdef DIAGNOSTIC 121 1.15.2.2 thorpej s = 0; /* XXX gcc -Wuninitialized */ 122 1.15.2.2 thorpej old_haxr2 = 0; /* XXX gcc -Wuninitialized */ 123 1.15.2.2 thorpej #endif 124 1.15.2.2 thorpej 125 1.15.2.2 thorpej /* 126 1.15.2.2 thorpej * Some (apparently-common) revisions of EB164 and AlphaStation 127 1.15.2.2 thorpej * firmware do the Wrong thing with PCI master aborts, which are 128 1.15.2.2 thorpej * caused by accesing the configuration space of devices that 129 1.15.2.2 thorpej * don't exist (for example). 130 1.15.2.2 thorpej * 131 1.15.2.2 thorpej * To work around this, we clear the CIA error register's PCI 132 1.15.2.2 thorpej * master abort bit before touching PCI configuration space and 133 1.15.2.2 thorpej * check it afterwards. If it indicates a master abort, 134 1.15.2.2 thorpej * the device wasn't there so we return 0xffffffff. 135 1.15.2.2 thorpej */ 136 1.15.2.2 thorpej /* clear the PCI master abort bit in CIA error register */ 137 1.15.2.2 thorpej REGVAL(CIA_CSR_CIA_ERR) = CIA_ERR_RCVD_MAS_ABT; 138 1.15.2.2 thorpej alpha_mb(); 139 1.15.2.2 thorpej alpha_pal_draina(); 140 1.15.2.2 thorpej 141 1.15.2.2 thorpej /* secondary if bus # != 0 */ 142 1.15.2.2 thorpej alpha_pci_decompose_tag(&ccp->cc_pc, tag, &secondary, 0, 0); 143 1.15.2.2 thorpej if (secondary) { 144 1.15.2.2 thorpej s = splhigh(); 145 1.15.2.2 thorpej old_haxr2 = REGVAL(CIA_CSRS + 0x480); /* XXX */ 146 1.15.2.2 thorpej alpha_mb(); 147 1.15.2.2 thorpej REGVAL(CIA_CSRS + 0x480) = old_haxr2 | 0x1; /* XXX */ 148 1.15.2.2 thorpej alpha_mb(); 149 1.15.2.2 thorpej } 150 1.15.2.2 thorpej 151 1.15.2.2 thorpej datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_PCI_CONF | 152 1.15.2.2 thorpej tag << 5UL | /* XXX */ 153 1.15.2.2 thorpej (offset & ~0x03) << 5 | /* XXX */ 154 1.15.2.2 thorpej 0 << 5 | /* XXX */ 155 1.15.2.2 thorpej 0x3 << 3); /* XXX */ 156 1.15.2.2 thorpej data = (pcireg_t)-1; 157 1.15.2.2 thorpej if (!(ba = badaddr(datap, sizeof *datap))) 158 1.15.2.2 thorpej data = *datap; 159 1.15.2.2 thorpej 160 1.15.2.2 thorpej if (secondary) { 161 1.15.2.2 thorpej alpha_mb(); 162 1.15.2.2 thorpej REGVAL(CIA_CSRS + 0x480) = old_haxr2; /* XXX */ 163 1.15.2.2 thorpej alpha_mb(); 164 1.15.2.2 thorpej splx(s); 165 1.15.2.2 thorpej } 166 1.15.2.2 thorpej 167 1.15.2.2 thorpej alpha_pal_draina(); 168 1.15.2.2 thorpej /* check CIA error register for PCI master abort */ 169 1.15.2.2 thorpej if (REGVAL(CIA_CSR_CIA_ERR) & CIA_ERR_RCVD_MAS_ABT) { 170 1.15.2.2 thorpej ba = 1; 171 1.15.2.2 thorpej data = 0xffffffff; 172 1.15.2.2 thorpej } 173 1.15.2.2 thorpej 174 1.15.2.2 thorpej #if 0 175 1.15.2.2 thorpej printf("cia_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg, 176 1.15.2.2 thorpej data, datap, ba ? " (badaddr)" : ""); 177 1.15.2.2 thorpej #endif 178 1.15.2.2 thorpej 179 1.15.2.2 thorpej return data; 180 1.15.2.2 thorpej } 181 1.15.2.2 thorpej 182 1.15.2.2 thorpej void 183 1.15.2.2 thorpej cia_conf_write(cpv, tag, offset, data) 184 1.15.2.2 thorpej void *cpv; 185 1.15.2.2 thorpej pcitag_t tag; 186 1.15.2.2 thorpej int offset; 187 1.15.2.2 thorpej pcireg_t data; 188 1.15.2.2 thorpej { 189 1.15.2.2 thorpej struct cia_config *ccp = cpv; 190 1.15.2.2 thorpej pcireg_t *datap; 191 1.15.2.2 thorpej int s, secondary; 192 1.15.2.2 thorpej int32_t old_haxr2; /* XXX */ 193 1.15.2.2 thorpej 194 1.15.2.2 thorpej #ifdef DIAGNOSTIC 195 1.15.2.2 thorpej s = 0; /* XXX gcc -Wuninitialized */ 196 1.15.2.2 thorpej old_haxr2 = 0; /* XXX gcc -Wuninitialized */ 197 1.15.2.2 thorpej #endif 198 1.15.2.2 thorpej 199 1.15.2.2 thorpej /* secondary if bus # != 0 */ 200 1.15.2.2 thorpej alpha_pci_decompose_tag(&ccp->cc_pc, tag, &secondary, 0, 0); 201 1.15.2.2 thorpej if (secondary) { 202 1.15.2.2 thorpej s = splhigh(); 203 1.15.2.2 thorpej old_haxr2 = REGVAL(CIA_CSRS + 0x480); /* XXX */ 204 1.15.2.2 thorpej alpha_mb(); 205 1.15.2.2 thorpej REGVAL(CIA_CSRS + 0x480) = old_haxr2 | 0x1; /* XXX */ 206 1.15.2.2 thorpej alpha_mb(); 207 1.15.2.2 thorpej } 208 1.15.2.2 thorpej 209 1.15.2.2 thorpej datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_PCI_CONF | 210 1.15.2.2 thorpej tag << 5UL | /* XXX */ 211 1.15.2.2 thorpej (offset & ~0x03) << 5 | /* XXX */ 212 1.15.2.2 thorpej 0 << 5 | /* XXX */ 213 1.15.2.2 thorpej 0x3 << 3); /* XXX */ 214 1.15.2.2 thorpej *datap = data; 215 1.15.2.2 thorpej 216 1.15.2.2 thorpej if (secondary) { 217 1.15.2.2 thorpej alpha_mb(); 218 1.15.2.2 thorpej REGVAL(CIA_CSRS + 0x480) = old_haxr2; /* XXX */ 219 1.15.2.2 thorpej alpha_mb(); 220 1.15.2.2 thorpej splx(s); 221 1.15.2.2 thorpej } 222 1.15.2.2 thorpej 223 1.15.2.2 thorpej #if 0 224 1.15.2.2 thorpej printf("cia_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag, 225 1.15.2.2 thorpej reg, data, datap); 226 1.15.2.2 thorpej #endif 227 1.15.2.2 thorpej } 228
Indexes created Fri Oct 31 11:10:07 GMT 2025