1 /* $OpenBSD: pci_eb64plus.c,v 1.16 2017/09/08 05:36:51 deraadt Exp $ */
2 /* $NetBSD: pci_eb64plus.c,v 1.10 2001/07/27 00:25:20 thorpej Exp $ */
3
4 /*-
5 * Copyright (c) 1998 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 of the Numerical Aerospace Simulation Facility,
10 * NASA Ames Research Center.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
36 * All rights reserved.
37 *
38 * Author: Chris G. Demetriou
39 *
40 * Permission to use, copy, modify and distribute this software and
41 * its documentation is hereby granted, provided that both the copyright
42 * notice and this permission notice appear in all copies of the
43 * software, derivative works or modified versions, and any portions
44 * thereof, and that both notices appear in supporting documentation.
45 *
46 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
47 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
48 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
49 *
50 * Carnegie Mellon requests users of this software to return to
51 *
52 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
53 * School of Computer Science
54 * Carnegie Mellon University
55 * Pittsburgh PA 15213-3890
56 *
57 * any improvements or extensions that they make and grant Carnegie the
58 * rights to redistribute these changes.
59 */
60
61 #include <sys/param.h>
62 #include <sys/time.h>
63 #include <sys/systm.h>
64 #include <sys/errno.h>
65 #include <sys/malloc.h>
66 #include <sys/device.h>
67 #include <sys/syslog.h>
68
69 #include <uvm/uvm_extern.h>
70
71 #include <machine/autoconf.h>
72
73 #include <dev/pci/pcireg.h>
74 #include <dev/pci/pcivar.h>
75 #include <dev/pci/ppbreg.h>
76
77 #include <alpha/pci/apecsreg.h>
78 #include <alpha/pci/apecsvar.h>
79
80 #include <alpha/pci/pci_eb64plus.h>
81
82 #include "sio.h"
83 #if NSIO
84 #include <alpha/pci/siovar.h>
85 #endif
86
87 int dec_eb64plus_intr_map(struct pci_attach_args *, pci_intr_handle_t *);
88 const char *dec_eb64plus_intr_string(void *, pci_intr_handle_t);
89 void *dec_eb64plus_intr_establish(void *, pci_intr_handle_t,
90 int, int (*func)(void *), void *, const char *);
91 void dec_eb64plus_intr_disestablish(void *, void *);
92
93 #define EB64PLUS_MAX_IRQ 32
94 #define PCI_STRAY_MAX 5
95
96 struct alpha_shared_intr *eb64plus_pci_intr;
97
98 bus_space_tag_t eb64plus_intrgate_iot;
99 bus_space_handle_t eb64plus_intrgate_ioh;
100
101 void eb64plus_iointr(void *arg, unsigned long vec);
102 extern void eb64plus_intr_enable(int irq); /* pci_eb64plus_intr.S */
103 extern void eb64plus_intr_disable(int irq); /* pci_eb64plus_intr.S */
104
105 void
pci_eb64plus_pickintr(acp)106 pci_eb64plus_pickintr(acp)
107 struct apecs_config *acp;
108 {
109 bus_space_tag_t iot = &acp->ac_iot;
110 pci_chipset_tag_t pc = &acp->ac_pc;
111 int i;
112
113 pc->pc_intr_v = acp;
114 pc->pc_intr_map = dec_eb64plus_intr_map;
115 pc->pc_intr_string = dec_eb64plus_intr_string;
116 pc->pc_intr_establish = dec_eb64plus_intr_establish;
117 pc->pc_intr_disestablish = dec_eb64plus_intr_disestablish;
118
119 /* Not supported on the EB64+. */
120 pc->pc_pciide_compat_intr_establish = NULL;
121
122 eb64plus_intrgate_iot = iot;
123 if (bus_space_map(eb64plus_intrgate_iot, 0x804, 3, 0,
124 &eb64plus_intrgate_ioh) != 0)
125 panic("pci_eb64plus_pickintr: couldn't map interrupt PLD");
126 for (i = 0; i < EB64PLUS_MAX_IRQ; i++)
127 eb64plus_intr_disable(i);
128
129 eb64plus_pci_intr = alpha_shared_intr_alloc(EB64PLUS_MAX_IRQ);
130 for (i = 0; i < EB64PLUS_MAX_IRQ; i++) {
131 alpha_shared_intr_set_maxstrays(eb64plus_pci_intr, i,
132 PCI_STRAY_MAX);
133 }
134
135 #if NSIO > 0
136 sio_intr_setup(pc, iot);
137 #endif
138 }
139
140 int
dec_eb64plus_intr_map(pa,ihp)141 dec_eb64plus_intr_map(pa, ihp)
142 struct pci_attach_args *pa;
143 pci_intr_handle_t *ihp;
144 {
145 int buspin, line = pa->pa_intrline;
146
147 /*
148 * The console places the interrupt mapping in the "line" value.
149 * We trust it whenever possible.
150 */
151 if (line >= 0 && line < EB64PLUS_MAX_IRQ) {
152 *ihp = line;
153 return 0;
154 }
155
156 if (pa->pa_bridgetag) {
157 buspin = PPB_INTERRUPT_SWIZZLE(pa->pa_rawintrpin,
158 pa->pa_device);
159 if (pa->pa_bridgeih[buspin - 1] != 0) {
160 *ihp = pa->pa_bridgeih[buspin - 1];
161 return 0;
162 }
163 }
164
165 return 1;
166 }
167
168 const char *
dec_eb64plus_intr_string(acv,ih)169 dec_eb64plus_intr_string(acv, ih)
170 void *acv;
171 pci_intr_handle_t ih;
172 {
173 static char irqstr[15]; /* 11 + 2 + NULL + sanity */
174
175 if (ih >= EB64PLUS_MAX_IRQ)
176 panic("dec_eb64plus_intr_string: bogus eb64+ IRQ 0x%lx", ih);
177 snprintf(irqstr, sizeof irqstr, "eb64+ irq %ld", ih);
178 return (irqstr);
179 }
180
181 void *
dec_eb64plus_intr_establish(acv,ih,level,func,arg,name)182 dec_eb64plus_intr_establish(acv, ih, level, func, arg, name)
183 void *acv;
184 pci_intr_handle_t ih;
185 int level;
186 int (*func)(void *);
187 void *arg;
188 const char *name;
189 {
190 void *cookie;
191
192 if (ih >= EB64PLUS_MAX_IRQ)
193 panic("dec_eb64plus_intr_establish: bogus eb64+ IRQ 0x%lx",
194 ih);
195
196 cookie = alpha_shared_intr_establish(eb64plus_pci_intr, ih, IST_LEVEL,
197 level, func, arg, name);
198
199 if (cookie != NULL &&
200 alpha_shared_intr_firstactive(eb64plus_pci_intr, ih)) {
201 scb_set(0x900 + SCB_IDXTOVEC(ih), eb64plus_iointr, NULL);
202 eb64plus_intr_enable(ih);
203 }
204 return (cookie);
205 }
206
207 void
dec_eb64plus_intr_disestablish(acv,cookie)208 dec_eb64plus_intr_disestablish(acv, cookie)
209 void *acv, *cookie;
210 {
211 struct alpha_shared_intrhand *ih = cookie;
212 unsigned int irq = ih->ih_num;
213 int s;
214
215 s = splhigh();
216
217 alpha_shared_intr_disestablish(eb64plus_pci_intr, cookie);
218 if (alpha_shared_intr_isactive(eb64plus_pci_intr, irq) == 0) {
219 eb64plus_intr_disable(irq);
220 alpha_shared_intr_set_dfltsharetype(eb64plus_pci_intr, irq,
221 IST_NONE);
222 scb_free(0x900 + SCB_IDXTOVEC(irq));
223 }
224
225 splx(s);
226 }
227
228 void
eb64plus_iointr(arg,vec)229 eb64plus_iointr(arg, vec)
230 void *arg;
231 unsigned long vec;
232 {
233 int irq;
234
235 irq = SCB_VECTOIDX(vec - 0x900);
236
237 if (!alpha_shared_intr_dispatch(eb64plus_pci_intr, irq)) {
238 alpha_shared_intr_stray(eb64plus_pci_intr, irq,
239 "eb64+ irq");
240 if (ALPHA_SHARED_INTR_DISABLE(eb64plus_pci_intr, irq))
241 eb64plus_intr_disable(irq);
242 } else
243 alpha_shared_intr_reset_strays(eb64plus_pci_intr, irq);
244 }
245
246 #if 0 /* THIS DOES NOT WORK! see pci_eb64plus_intr.S. */
247 u_int8_t eb64plus_intr_mask[3] = { 0xff, 0xff, 0xff };
248
249 void
250 eb64plus_intr_enable(irq)
251 int irq;
252 {
253 int byte = (irq / 8), bit = (irq % 8);
254
255 #if 1
256 printf("eb64plus_intr_enable: enabling %d (%d:%d)\n", irq, byte, bit);
257 #endif
258 eb64plus_intr_mask[byte] &= ~(1 << bit);
259
260 bus_space_write_1(eb64plus_intrgate_iot, eb64plus_intrgate_ioh, byte,
261 eb64plus_intr_mask[byte]);
262 }
263
264 void
265 eb64plus_intr_disable(irq)
266 int irq;
267 {
268 int byte = (irq / 8), bit = (irq % 8);
269
270 #if 1
271 printf("eb64plus_intr_disable: disabling %d (%d:%d)\n", irq, byte, bit);
272 #endif
273 eb64plus_intr_mask[byte] |= (1 << bit);
274
275 bus_space_write_1(eb64plus_intrgate_iot, eb64plus_intrgate_ioh, byte,
276 eb64plus_intr_mask[byte]);
277 }
278 #endif
279