1 /* $NetBSD: lca.c,v 1.57 2021/08/07 16:18:41 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 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 /* 33 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 34 * All rights reserved. 35 * 36 * Authors: Jeffrey Hsu and Chris G. Demetriou 37 * 38 * Permission to use, copy, modify and distribute this software and 39 * its documentation is hereby granted, provided that both the copyright 40 * notice and this permission notice appear in all copies of the 41 * software, derivative works or modified versions, and any portions 42 * thereof, and that both notices appear in supporting documentation. 43 * 44 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 45 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 46 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 47 * 48 * Carnegie Mellon requests users of this software to return to 49 * 50 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 51 * School of Computer Science 52 * Carnegie Mellon University 53 * Pittsburgh PA 15213-3890 54 * 55 * any improvements or extensions that they make and grant Carnegie the 56 * rights to redistribute these changes. 57 */ 58 59 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 60 61 __KERNEL_RCSID(0, "$NetBSD: lca.c,v 1.57 2021/08/07 16:18:41 thorpej Exp $"); 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/kernel.h> 66 #include <sys/device.h> 67 68 #include <uvm/uvm_extern.h> 69 70 #include <machine/autoconf.h> 71 #include <machine/rpb.h> 72 #include <machine/sysarch.h> 73 74 #include <dev/isa/isareg.h> 75 #include <dev/isa/isavar.h> 76 77 #include <dev/pci/pcireg.h> 78 #include <dev/pci/pcivar.h> 79 #include <alpha/pci/lcareg.h> 80 #include <alpha/pci/lcavar.h> 81 82 static int lcamatch(device_t, cfdata_t, void *); 83 static void lcaattach(device_t, device_t, void *); 84 85 CFATTACH_DECL_NEW(lca, sizeof(struct lca_softc), 86 lcamatch, lcaattach, NULL, NULL); 87 88 extern struct cfdriver lca_cd; 89 90 static int lca_bus_get_window(int, int, 91 struct alpha_bus_space_translation *); 92 93 /* There can be only one. */ 94 struct lca_config lca_configuration; 95 static int lcafound; 96 97 static const u_int lca_bcache_sizes[__SHIFTOUT(MEMC_CAR_BCS, MEMC_CAR_BCS)] = { 98 [BCS_64K] = 64 * 1024, 99 [BCS_128K] = 128 * 1024, 100 [BCS_256K] = 256 * 1024, 101 [BCS_512K] = 512 * 1024, 102 [BCS_1M] = 1024 * 1024, 103 [BCS_2M] = 2048 * 1024, 104 /* Other values are reserved and we treat them as 0. */ 105 }; 106 107 static int 108 lcamatch(device_t parent, cfdata_t match, void *aux) 109 { 110 struct mainbus_attach_args *ma = aux; 111 112 /* Make sure that we're looking for a LCA. */ 113 if (strcmp(ma->ma_name, lca_cd.cd_name) != 0) 114 return (0); 115 116 if (lcafound) 117 return (0); 118 119 return (1); 120 } 121 122 /* 123 * Probe the memory controller's Bcache configuration. 124 */ 125 void 126 lca_probe_bcache(void) 127 { 128 const uint64_t car = REGVAL64(LCA_MEMC_CAR); 129 130 if (lca_configuration.lc_bcache_size != 0) { 131 /* Already done. */ 132 return; 133 } 134 135 if (car & MEMC_CAR_BCE) { 136 lca_configuration.lc_bcache_size = 137 lca_bcache_sizes[__SHIFTOUT(car, MEMC_CAR_BCS)]; 138 } else { 139 lca_configuration.lc_bcache_size = 0; 140 } 141 142 if (lca_configuration.lc_bcache_size) { 143 uvmexp.ncolors = atop(lca_configuration.lc_bcache_size); 144 } 145 } 146 147 /* 148 * Set up the chipset's function pointers. 149 */ 150 void 151 lca_init(struct lca_config *lcp, int mallocsafe) 152 { 153 154 /* 155 * The LCA HAE register is WRITE-ONLY, so we can't tell where 156 * the second sparse window is actually mapped. Therefore, 157 * we have to guess where it is. This seems to be the normal 158 * address. 159 */ 160 lcp->lc_s_mem_w2_masked_base = 0x80000000; 161 162 if (!lcp->lc_initted) { 163 /* don't do these twice since they set up extents */ 164 lca_bus_io_init(&lcp->lc_iot, lcp); 165 lca_bus_mem_init(&lcp->lc_memt, lcp); 166 167 /* 168 * We have 1 I/O window and 3 MEM windows. 169 */ 170 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 1; 171 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 3; 172 alpha_bus_get_window = lca_bus_get_window; 173 } 174 lcp->lc_mallocsafe = mallocsafe; 175 176 lca_pci_init(&lcp->lc_pc, lcp); 177 alpha_pci_chipset = &lcp->lc_pc; 178 179 /* 180 * Refer to ``DECchip 21066 and DECchip 21068 Alpha AXP Microprocessors 181 * Hardware Reference Manual''. 182 * ... 183 */ 184 185 /* 186 * According to section 6.4.1, all bits of the IOC_HAE register are 187 * undefined after reset. Bits <31:27> are write-only. However, we 188 * cannot blindly set it to zero. The serial ROM code that initializes 189 * the PCI devices' address spaces, allocates sparse memory blocks in 190 * the range that must use the IOC_HAE register for address translation, 191 * and sets this register accordingly (see section 6.4.14). 192 * 193 * IOC_HAE left AS IS. 194 */ 195 196 /* According to section 6.4.2, all bits of the IOC_CONF register are 197 * undefined after reset. Bits <1:0> are write-only. Set them to 198 * 0x00 for PCI Type 0 configuration access. 199 * 200 * IOC_CONF set to ZERO. 201 */ 202 REGVAL64(LCA_IOC_CONF) = 0; 203 204 lcp->lc_initted = 1; 205 } 206 207 static void 208 lcaattach(device_t parent, device_t self, void *aux) 209 { 210 struct lca_softc *sc = device_private(self); 211 struct lca_config *lcp; 212 struct pcibus_attach_args pba; 213 214 /* note that we've attached the chipset; can't have 2 LCAs. */ 215 lcafound = 1; 216 sc->sc_dev = self; 217 218 /* 219 * set up the chipset's info; done once at console init time 220 * (maybe), but we must do it twice to take care of things 221 * that need to use memory allocation. 222 */ 223 lcp = sc->sc_lcp = &lca_configuration; 224 lca_init(lcp, 1); 225 226 /* XXX print chipset information */ 227 aprint_normal("\n"); 228 if (lcp->lc_bcache_size != 0) { 229 char buf[sizeof("256 KB")]; 230 if (format_bytes(buf, sizeof(buf), lcp->lc_bcache_size) > 0) { 231 aprint_normal_dev(self, "%s Bcache detected\n", buf); 232 } 233 } 234 235 lca_dma_init(lcp); 236 237 alpha_pci_intr_init(lcp, &lcp->lc_iot, &lcp->lc_memt, &lcp->lc_pc); 238 239 pba.pba_iot = &lcp->lc_iot; 240 pba.pba_memt = &lcp->lc_memt; 241 pba.pba_dmat = 242 alphabus_dma_get_tag(&lcp->lc_dmat_direct, ALPHA_BUS_PCI); 243 pba.pba_dmat64 = NULL; 244 pba.pba_pc = &lcp->lc_pc; 245 pba.pba_bus = 0; 246 pba.pba_bridgetag = NULL; 247 pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY | 248 PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY; 249 config_found(self, &pba, pcibusprint, CFARGS_NONE); 250 } 251 252 static int 253 lca_bus_get_window(int type, int window, 254 struct alpha_bus_space_translation *abst) 255 { 256 struct lca_config *lcp = &lca_configuration; 257 bus_space_tag_t st; 258 259 switch (type) { 260 case ALPHA_BUS_TYPE_PCI_IO: 261 st = &lcp->lc_iot; 262 break; 263 264 case ALPHA_BUS_TYPE_PCI_MEM: 265 st = &lcp->lc_memt; 266 break; 267 268 default: 269 panic("lca_bus_get_window"); 270 } 271 272 return (alpha_bus_space_get_window(st, window, abst)); 273 } 274