ttwoga_pci.c revision 1.3.8.1
1 /* $NetBSD: ttwoga_pci.c,v 1.3.8.1 2008/05/18 12:31:24 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 33 34 __KERNEL_RCSID(0, "$NetBSD: ttwoga_pci.c,v 1.3.8.1 2008/05/18 12:31:24 yamt Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/device.h> 40 #include <sys/simplelock.h> 41 42 #include <dev/pci/pcireg.h> 43 #include <dev/pci/pcivar.h> 44 45 #include <alpha/pci/ttwogareg.h> 46 #include <alpha/pci/ttwogavar.h> 47 48 void ttwoga_attach_hook(struct device *, struct device *, 49 struct pcibus_attach_args *); 50 int ttwoga_bus_maxdevs(void *, int); 51 pcitag_t ttwoga_make_tag(void *, int, int, int); 52 void ttwoga_decompose_tag(void *, pcitag_t, int *, int *, 53 int *); 54 pcireg_t ttwoga_conf_read(void *, pcitag_t, int); 55 void ttwoga_conf_write(void *, pcitag_t, int, pcireg_t); 56 57 paddr_t ttwoga_make_type0addr(int, int); 58 59 /* 60 * The T2 has an annoying bug that can manifest itself while 61 * probing for devices. If a non-existent CBUS address is 62 * accessed with a read, "a few" subsequent write cycles 63 * will generate spurious memory errors. We work around this 64 * by tracking which CPU has the PCI configuration mutex and 65 * "expect" machine checks on that CPU for the duraction of 66 * the PCI configuration access routine. 67 */ 68 69 struct simplelock ttwoga_conf_slock; 70 cpuid_t ttwoga_conf_cpu; /* XXX core logic bug */ 71 72 #define TTWOGA_CONF_LOCK(s) \ 73 do { \ 74 (s) = splhigh(); \ 75 simple_lock(&ttwoga_conf_slock); \ 76 ttwoga_conf_cpu = cpu_number(); \ 77 } while (0) 78 79 #define TTWOGA_CONF_UNLOCK(s) \ 80 do { \ 81 ttwoga_conf_cpu = (cpuid_t)-1; \ 82 simple_unlock(&ttwoga_conf_slock); \ 83 splx((s)); \ 84 } while (0) 85 86 void 87 ttwoga_pci_init(pci_chipset_tag_t pc, void *v) 88 { 89 90 simple_lock_init(&ttwoga_conf_slock); 91 92 pc->pc_conf_v = v; 93 pc->pc_attach_hook = ttwoga_attach_hook; 94 pc->pc_bus_maxdevs = ttwoga_bus_maxdevs; 95 pc->pc_make_tag = ttwoga_make_tag; 96 pc->pc_decompose_tag = ttwoga_decompose_tag; 97 pc->pc_conf_read = ttwoga_conf_read; 98 pc->pc_conf_write = ttwoga_conf_write; 99 } 100 101 void 102 ttwoga_attach_hook(struct device *parent, struct device *self, 103 struct pcibus_attach_args *pba) 104 { 105 } 106 107 int 108 ttwoga_bus_maxdevs(void *cpv, int busno) 109 { 110 111 return 32; 112 } 113 114 pcitag_t 115 ttwoga_make_tag(void *cpv, int b, int d, int f) 116 { 117 118 /* This is the format used for Type 1 configuration cycles. */ 119 return (b << 16) | (d << 11) | (f << 8); 120 } 121 122 void 123 ttwoga_decompose_tag(void *cpv, pcitag_t tag, int *bp, int *dp, int *fp) 124 { 125 126 if (bp != NULL) 127 *bp = (tag >> 16) & 0xff; 128 if (dp != NULL) 129 *dp = (tag >> 11) & 0x1f; 130 if (fp != NULL) 131 *fp = (tag >> 8) & 0x7; 132 } 133 134 paddr_t 135 ttwoga_make_type0addr(int d, int f) 136 { 137 138 if (d > 8) /* XXX ??? */ 139 return ((paddr_t) -1); 140 return ((0x0800UL << d) | (f << 8)); 141 } 142 143 pcireg_t 144 ttwoga_conf_read(void *cpv, pcitag_t tag, int offset) 145 { 146 struct ttwoga_config *tcp = cpv; 147 pcireg_t *datap, data; 148 int s, b, d, f, ba; 149 paddr_t addr; 150 u_int64_t old_hae3; 151 152 pci_decompose_tag(&tcp->tc_pc, tag, &b, &d, &f); 153 154 addr = b ? tag : ttwoga_make_type0addr(d, f); 155 if (addr == (paddr_t)-1) 156 return ((pcireg_t) -1); 157 158 TTWOGA_CONF_LOCK(s); 159 160 alpha_mb(); 161 old_hae3 = T2GA(tcp, T2_HAE0_3) & ~HAE0_3_PCA; 162 T2GA(tcp, T2_HAE0_3) = 163 old_hae3 | ((b ? 1UL : 0UL) << HAE0_3_PCA_SHIFT); 164 alpha_mb(); 165 alpha_mb(); 166 167 datap = 168 (pcireg_t *)ALPHA_PHYS_TO_K0SEG(tcp->tc_sysmap->tsmap_conf_base | 169 addr << 5UL | /* address shift */ 170 (offset & ~0x03) << 5UL | /* address shift */ 171 0x3 << 3UL); /* 4-byte, size shift */ 172 data = (pcireg_t)-1; 173 if (!(ba = badaddr(datap, sizeof *datap))) 174 data = *datap; 175 176 alpha_mb(); 177 T2GA(tcp, T2_HAE0_3) = old_hae3; 178 alpha_mb(); 179 alpha_mb(); 180 181 alpha_pal_draina(); 182 alpha_mb(); 183 alpha_mb(); 184 185 TTWOGA_CONF_UNLOCK(s); 186 187 #if 0 188 printf("ttwoga_conf_read: tag 0x%lx, reg 0x%x -> 0x%x @ %p%s\n", 189 tag, offset, data, datap, ba ? " (badaddr)" : ""); 190 #endif 191 192 return (data); 193 } 194 195 void 196 ttwoga_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data) 197 { 198 struct ttwoga_config *tcp = cpv; 199 pcireg_t *datap; 200 int s, b, d, f; 201 paddr_t addr; 202 u_int64_t old_hae3; 203 204 pci_decompose_tag(&tcp->tc_pc, tag, &b, &d, &f); 205 206 addr = b ? tag : ttwoga_make_type0addr(d, f); 207 if (addr == (paddr_t)-1) 208 return; 209 210 TTWOGA_CONF_LOCK(s); 211 212 alpha_mb(); 213 old_hae3 = T2GA(tcp, T2_HAE0_3) & ~HAE0_3_PCA; 214 T2GA(tcp, T2_HAE0_3) = 215 old_hae3 | ((b ? 1UL : 0UL) << HAE0_3_PCA_SHIFT); 216 alpha_mb(); 217 alpha_mb(); 218 219 datap = 220 (pcireg_t *)ALPHA_PHYS_TO_K0SEG(tcp->tc_sysmap->tsmap_conf_base | 221 addr << 5UL | /* address shift */ 222 (offset & ~0x03) << 5UL | /* address shift */ 223 0x3 << 3UL); /* 4-byte, size shift */ 224 225 alpha_mb(); 226 *datap = data; 227 alpha_mb(); 228 alpha_mb(); 229 230 alpha_mb(); 231 T2GA(tcp, T2_HAE0_3) = old_hae3; 232 alpha_mb(); 233 alpha_mb(); 234 235 TTWOGA_CONF_UNLOCK(s); 236 237 #if 0 238 printf("ttwoga_conf_write: tag 0x%lx, reg 0x%x -> 0x%x @ %p\n", 239 tag, offset, data, datap); 240 #endif 241 } 242
Indexes created Mon Oct 20 11:09:49 GMT 2025