1 /* $OpenBSD: lca.c,v 1.24 2022/03/13 08:04:13 mpi Exp $ */
2 /* $NetBSD: lca.c,v 1.14 1996/12/05 01:39:35 cgd Exp $ */
3
4 /*-
5 * Copyright (c) 2000 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jason R. Thorpe.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
35 * All rights reserved.
36 *
37 * Authors: Jeffrey Hsu and Chris G. Demetriou
38 *
39 * Permission to use, copy, modify and distribute this software and
40 * its documentation is hereby granted, provided that both the copyright
41 * notice and this permission notice appear in all copies of the
42 * software, derivative works or modified versions, and any portions
43 * thereof, and that both notices appear in supporting documentation.
44 *
45 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
46 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
47 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
48 *
49 * Carnegie Mellon requests users of this software to return to
50 *
51 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
52 * School of Computer Science
53 * Carnegie Mellon University
54 * Pittsburgh PA 15213-3890
55 *
56 * any improvements or extensions that they make and grant Carnegie the
57 * rights to redistribute these changes.
58 */
59
60 #include <sys/param.h>
61 #include <sys/systm.h>
62 #include <sys/kernel.h>
63 #include <sys/malloc.h>
64 #include <sys/device.h>
65
66 #include <uvm/uvm_extern.h>
67
68 #include <machine/autoconf.h>
69 #include <machine/cpuconf.h>
70 #include <machine/rpb.h>
71
72 #include <dev/isa/isareg.h>
73 #include <dev/isa/isavar.h>
74
75 #include <dev/pci/pcireg.h>
76 #include <dev/pci/pcivar.h>
77 #include <alpha/pci/lcareg.h>
78 #include <alpha/pci/lcavar.h>
79 #ifdef DEC_AXPPCI_33
80 #include <alpha/pci/pci_axppci_33.h>
81 #endif
82 #ifdef DEC_ALPHABOOK1
83 #include <alpha/pci/pci_alphabook1.h>
84 #endif
85 #ifdef DEC_EB66
86 #include <alpha/pci/pci_eb66.h>
87 #endif
88
89 int lcamatch(struct device *, void *, void *);
90 void lcaattach(struct device *, struct device *, void *);
91
92 const struct cfattach lca_ca = {
93 sizeof(struct device), lcamatch, lcaattach,
94 };
95
96 struct cfdriver lca_cd = {
97 NULL, "lca", DV_DULL,
98 };
99
100 int lcaprint(void *, const char *pnp);
101
102 #if 0
103 int lca_bus_get_window(int, int,
104 struct alpha_bus_space_translation *);
105 #endif
106 void lca_machine_check(unsigned long, struct trapframe *, unsigned long,
107 unsigned long);
108
109 /* There can be only one. */
110 int lcafound;
111 struct lca_config lca_configuration;
112
113 int
lcamatch(parent,match,aux)114 lcamatch(parent, match, aux)
115 struct device *parent;
116 void *match;
117 void *aux;
118 {
119 struct mainbus_attach_args *ma = aux;
120
121 /* Make sure that we're looking for a LCA. */
122 if (strcmp(ma->ma_name, lca_cd.cd_name) != 0)
123 return (0);
124
125 if (lcafound)
126 return (0);
127
128 return (1);
129 }
130
131 /*
132 * Set up the chipset's function pointers.
133 */
134 void
lca_init(lcp,mallocsafe)135 lca_init(lcp, mallocsafe)
136 struct lca_config *lcp;
137 int mallocsafe;
138 {
139
140 /*
141 * The LCA HAE register is WRITE-ONLY, so we can't tell where
142 * the second sparse window is actually mapped. Therefore,
143 * we have to guess where it is. This seems to be the normal
144 * address.
145 */
146 lcp->lc_s_mem_w2_masked_base = 0x80000000;
147
148 if (!lcp->lc_initted) {
149 /* don't do these twice since they set up extents */
150 lca_bus_io_init(&lcp->lc_iot, lcp);
151 lca_bus_mem_init(&lcp->lc_memt, lcp);
152
153 #if 0
154 /*
155 * We have 1 I/O window and 3 MEM windows.
156 */
157 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 1;
158 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 3;
159 alpha_bus_get_window = lca_bus_get_window;
160 #endif
161 }
162 lcp->lc_mallocsafe = mallocsafe;
163
164 lca_pci_init(&lcp->lc_pc, lcp);
165 alpha_pci_chipset = &lcp->lc_pc;
166 alpha_pci_chipset->pc_name = "lca";
167 alpha_pci_chipset->pc_mem = LCA_PCI_SPARSE;
168 alpha_pci_chipset->pc_ports = LCA_PCI_SIO;
169 alpha_pci_chipset->pc_hae_mask = IOC_HAE_ADDREXT;
170 alpha_pci_chipset->pc_dense = LCA_PCI_DENSE;
171 alpha_pci_chipset->pc_bwx = 0;
172
173 /*
174 * Refer to ``DECchip 21066 and DECchip 21068 Alpha AXP Microprocessors
175 * Hardware Reference Manual''.
176 * ...
177 */
178
179 /*
180 * According to section 6.4.1, all bits of the IOC_HAE register are
181 * undefined after reset. Bits <31:27> are write-only. However, we
182 * cannot blindly set it to zero. The serial ROM code that initializes
183 * the PCI devices' address spaces, allocates sparse memory blocks in
184 * the range that must use the IOC_HAE register for address translation,
185 * and sets this register accordingly (see section 6.4.14).
186 *
187 * IOC_HAE left AS IS.
188 */
189
190 /*
191 * According to section 6.4.2, all bits of the IOC_CONF register are
192 * undefined after reset. Bits <1:0> are write-only. Set them to
193 * 0x00 for PCI Type 0 configuration access.
194 *
195 * IOC_CONF set to ZERO.
196 */
197 REGVAL64(LCA_IOC_CONF) = 0;
198
199 /*
200 * Disable parity on the bus. According to Linux, on some systems,
201 * siop(4) behaves badly unless parity is disabled.
202 */
203 REGVAL64(LCA_IOC_PAR_DIS) = IOC_PAR_DISABLE;
204
205 lcp->lc_initted = 1;
206 }
207
208 void
lcaattach(parent,self,aux)209 lcaattach(parent, self, aux)
210 struct device *parent, *self;
211 void *aux;
212 {
213 struct lca_config *lcp;
214 struct pcibus_attach_args pba;
215
216 /* note that we've attached the chipset; can't have 2 LCAs. */
217 /* Um, not sure about this. XXX JH */
218 lcafound = 1;
219
220 /*
221 * set up the chipset's info; done once at console init time
222 * (maybe), but we must do it twice to take care of things
223 * that need to use memory allocation.
224 */
225 lcp = &lca_configuration;
226 lca_init(lcp, 1);
227
228 /* XXX print chipset information */
229 printf("\n");
230
231 lca_dma_init(lcp);
232
233 /* safe to override since LCA machines do not set mcheck_handler */
234 platform.mcheck_handler = lca_machine_check;
235
236 switch (cputype) {
237 #ifdef DEC_AXPPCI_33
238 case ST_DEC_AXPPCI_33:
239 pci_axppci_33_pickintr(lcp);
240 break;
241 #endif
242 #ifdef DEC_ALPHABOOK1
243 case ST_ALPHABOOK1:
244 pci_alphabook1_pickintr(lcp);
245 break;
246 #endif
247 #ifdef DEC_EB66
248 case ST_EB66:
249 pci_eb66_pickintr(lcp);
250 break;
251 #endif
252
253 default:
254 panic("lcaattach: shouldn't be here, really...");
255 }
256
257 bzero(&pba, sizeof(pba));
258 pba.pba_busname = "pci";
259 pba.pba_iot = &lcp->lc_iot;
260 pba.pba_memt = &lcp->lc_memt;
261 pba.pba_dmat =
262 alphabus_dma_get_tag(&lcp->lc_dmat_direct, ALPHA_BUS_PCI);
263 pba.pba_pc = &lcp->lc_pc;
264 pba.pba_domain = pci_ndomains++;
265 pba.pba_bus = 0;
266 #ifdef notyet
267 pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED |
268 PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
269 #endif
270 config_found(self, &pba, lcaprint);
271 }
272
273 int
lcaprint(aux,pnp)274 lcaprint(aux, pnp)
275 void *aux;
276 const char *pnp;
277 {
278 register struct pcibus_attach_args *pba = aux;
279
280 /* only PCIs can attach to LCAes; easy. */
281 if (pnp)
282 printf("%s at %s", pba->pba_busname, pnp);
283 printf(" bus %d", pba->pba_bus);
284 return (UNCONF);
285 }
286
287 #if 0
288 int
289 lca_bus_get_window(type, window, abst)
290 int type, window;
291 struct alpha_bus_space_translation *abst;
292 {
293 struct lca_config *lcp = &lca_configuration;
294 bus_space_tag_t st;
295
296 switch (type) {
297 case ALPHA_BUS_TYPE_PCI_IO:
298 st = &lcp->lc_iot;
299 break;
300
301 case ALPHA_BUS_TYPE_PCI_MEM:
302 st = &lcp->lc_memt;
303 break;
304
305 default:
306 panic("lca_bus_get_window");
307 }
308
309 return (alpha_bus_space_get_window(st, window, abst));
310 }
311 #endif
312
313 void
lca_machine_check(unsigned long mces,struct trapframe * framep,unsigned long vector,unsigned long param)314 lca_machine_check(unsigned long mces, struct trapframe *framep,
315 unsigned long vector, unsigned long param)
316 {
317 int64_t stat0;
318
319 machine_check(mces, framep, vector, param);
320 /* clear error flags in IOC_STATUS0 register */
321 stat0 = REGVAL64(LCA_IOC_STAT0);
322 REGVAL64(LCA_IOC_STAT0) = stat0;
323 }
324