1 /* $NetBSD: apecs_pci.c,v 1.23 2010/12/15 01:27:18 matt 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: apecs_pci.c,v 1.23 2010/12/15 01:27:18 matt 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 <dev/pci/pcireg.h> 40 #include <dev/pci/pcivar.h> 41 #include <alpha/pci/apecsreg.h> 42 #include <alpha/pci/apecsvar.h> 43 44 void apecs_attach_hook(struct device *, struct device *, 45 struct pcibus_attach_args *); 46 int apecs_bus_maxdevs(void *, int); 47 pcitag_t apecs_make_tag(void *, int, int, int); 48 void apecs_decompose_tag(void *, pcitag_t, int *, int *, 49 int *); 50 pcireg_t apecs_conf_read(void *, pcitag_t, int); 51 void apecs_conf_write(void *, pcitag_t, int, pcireg_t); 52 53 void 54 apecs_pci_init(pci_chipset_tag_t pc, void *v) 55 { 56 57 pc->pc_conf_v = v; 58 pc->pc_attach_hook = apecs_attach_hook; 59 pc->pc_bus_maxdevs = apecs_bus_maxdevs; 60 pc->pc_make_tag = apecs_make_tag; 61 pc->pc_decompose_tag = apecs_decompose_tag; 62 pc->pc_conf_read = apecs_conf_read; 63 pc->pc_conf_write = apecs_conf_write; 64 } 65 66 void 67 apecs_attach_hook(struct device *parent, struct device *self, struct pcibus_attach_args *pba) 68 { 69 } 70 71 int 72 apecs_bus_maxdevs(void *cpv, int busno) 73 { 74 75 return 32; 76 } 77 78 pcitag_t 79 apecs_make_tag(void *cpv, int b, int d, int f) 80 { 81 82 return (b << 16) | (d << 11) | (f << 8); 83 } 84 85 void 86 apecs_decompose_tag(void *cpv, pcitag_t tag, int *bp, int *dp, int *fp) 87 { 88 89 if (bp != NULL) 90 *bp = (tag >> 16) & 0xff; 91 if (dp != NULL) 92 *dp = (tag >> 11) & 0x1f; 93 if (fp != NULL) 94 *fp = (tag >> 8) & 0x7; 95 } 96 97 pcireg_t 98 apecs_conf_read(void *cpv, pcitag_t tag, int offset) 99 { 100 struct apecs_config *acp = cpv; 101 pcireg_t *datap, data; 102 int s, secondary, ba; 103 int32_t old_haxr2; /* XXX */ 104 105 s = 0; /* XXX gcc -Wuninitialized */ 106 old_haxr2 = 0; /* XXX gcc -Wuninitialized */ 107 108 /* secondary if bus # != 0 */ 109 pci_decompose_tag(&acp->ac_pc, tag, &secondary, 0, 0); 110 if (secondary) { 111 s = splhigh(); 112 old_haxr2 = REGVAL(EPIC_HAXR2); 113 alpha_mb(); 114 REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1; 115 alpha_mb(); 116 } 117 118 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF | 119 tag << 5UL | /* XXX */ 120 (offset & ~0x03) << 5 | /* XXX */ 121 0 << 5 | /* XXX */ 122 0x3 << 3); /* XXX */ 123 data = (pcireg_t)-1; 124 if (!(ba = badaddr(datap, sizeof *datap))) 125 data = *datap; 126 127 if (secondary) { 128 alpha_mb(); 129 REGVAL(EPIC_HAXR2) = old_haxr2; 130 alpha_mb(); 131 splx(s); 132 } 133 134 #if 0 135 printf("apecs_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg, 136 data, datap, ba ? " (badaddr)" : ""); 137 #endif 138 139 return data; 140 } 141 142 void 143 apecs_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data) 144 { 145 struct apecs_config *acp = cpv; 146 pcireg_t *datap; 147 int s, secondary; 148 int32_t old_haxr2; /* XXX */ 149 150 s = 0; /* XXX gcc -Wuninitialized */ 151 old_haxr2 = 0; /* XXX gcc -Wuninitialized */ 152 153 /* secondary if bus # != 0 */ 154 pci_decompose_tag(&acp->ac_pc, tag, &secondary, 0, 0); 155 if (secondary) { 156 s = splhigh(); 157 old_haxr2 = REGVAL(EPIC_HAXR2); 158 alpha_mb(); 159 REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1; 160 alpha_mb(); 161 } 162 163 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF | 164 tag << 5UL | /* XXX */ 165 (offset & ~0x03) << 5 | /* XXX */ 166 0 << 5 | /* XXX */ 167 0x3 << 3); /* XXX */ 168 169 alpha_mb(); 170 *datap = data; 171 alpha_mb(); 172 alpha_mb(); 173 174 if (secondary) { 175 alpha_mb(); 176 REGVAL(EPIC_HAXR2) = old_haxr2; 177 alpha_mb(); 178 splx(s); 179 } 180 181 #if 0 182 printf("apecs_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag, 183 reg, data, datap); 184 #endif 185 } 186