1 /* $NetBSD: eisa_machdep.c,v 1.42 2024/05/01 16:28:33 andvar Exp $ */
2
3 /*-
4 * Copyright (c) 1997, 1998 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 of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center.
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) 1996 Christopher G. Demetriou. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. All advertising materials mentioning features or use of this software
45 * must display the following acknowledgement:
46 * This product includes software developed by Christopher G. Demetriou
47 * for the NetBSD Project.
48 * 4. The name of the author may not be used to endorse or promote products
49 * derived from this software without specific prior written permission
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
53 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
54 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
55 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
56 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
60 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 */
62
63 /*
64 * Machine-specific functions for EISA autoconfiguration.
65 */
66
67 #include <sys/cdefs.h>
68 __KERNEL_RCSID(0, "$NetBSD: eisa_machdep.c,v 1.42 2024/05/01 16:28:33 andvar Exp $");
69
70 #include "ioapic.h"
71
72 #include <sys/types.h>
73 #include <sys/param.h>
74 #include <sys/time.h>
75 #include <sys/systm.h>
76 #include <sys/errno.h>
77 #include <sys/device.h>
78
79 #include <sys/bus.h>
80 #include <machine/bus_private.h>
81
82 #include <dev/isa/isareg.h>
83 #include <dev/isa/isavar.h>
84 #include <dev/eisa/eisavar.h>
85
86 #if NIOAPIC > 0
87 #include <machine/i82093var.h>
88 #include <machine/mpbiosvar.h>
89 #endif
90
91 /*
92 * EISA doesn't have any special needs; just use the generic versions
93 * of these functions.
94 *
95 * XXX really doesn't use bounce buffers? --dyoung
96 */
97 struct x86_bus_dma_tag eisa_bus_dma_tag = {
98 ._tag_needs_free = 0,
99 ._bounce_thresh = 0,
100 ._bounce_alloc_lo = 0,
101 ._bounce_alloc_hi = 0,
102 ._may_bounce = NULL,
103 };
104
105 void
eisa_attach_hook(device_t parent,device_t self,struct eisabus_attach_args * eba)106 eisa_attach_hook(device_t parent, device_t self,
107 struct eisabus_attach_args *eba)
108 {
109 extern int eisa_has_been_seen;
110
111 /*
112 * Notify others that might need to know that the EISA bus
113 * has now been attached.
114 */
115 if (eisa_has_been_seen)
116 panic("eisaattach: EISA bus already seen!");
117 eisa_has_been_seen = 1;
118 }
119
120 int
eisa_maxslots(eisa_chipset_tag_t ec)121 eisa_maxslots(eisa_chipset_tag_t ec)
122 {
123
124 /*
125 * Always try 16 slots.
126 */
127 return (16);
128 }
129
130 int
eisa_intr_map(eisa_chipset_tag_t ec,u_int irq,eisa_intr_handle_t * ihp)131 eisa_intr_map(eisa_chipset_tag_t ec, u_int irq,
132 eisa_intr_handle_t *ihp)
133 {
134 if (irq >= NUM_LEGACY_IRQS) {
135 aprint_error("eisa_intr_map: bad IRQ %d\n", irq);
136 *ihp = -1;
137 return 1;
138 }
139 if (irq == 2) {
140 aprint_verbose("eisa_intr_map: changed IRQ 2 to IRQ 9\n");
141 irq = 9;
142 }
143
144 #if NIOAPIC > 0
145 if (mp_busses != NULL) {
146 if (intr_find_mpmapping(mp_eisa_bus, irq, ihp) == 0 ||
147 intr_find_mpmapping(mp_isa_bus, irq, ihp) == 0) {
148 *ihp |= irq;
149 return 0;
150 } else
151 aprint_verbose("eisa_intr_map: no MP mapping found\n");
152 }
153 #endif
154
155 *ihp = irq;
156 return 0;
157 }
158
159 const char *
eisa_intr_string(eisa_chipset_tag_t ec,eisa_intr_handle_t ih,char * buf,size_t len)160 eisa_intr_string(eisa_chipset_tag_t ec, eisa_intr_handle_t ih, char *buf,
161 size_t len)
162 {
163 int irq;
164
165 #if NIOAPIC > 0
166 irq = APIC_IRQ_LEGACY_IRQ(ih);
167 #else
168 irq = (int) ih;
169 #endif
170
171 if (ih == 0 || irq >= NUM_LEGACY_IRQS || ih == 2)
172 panic("eisa_intr_string: bogus handle 0x%" PRIx64, ih);
173
174 #if NIOAPIC > 0
175 if (ih & APIC_INT_VIA_APIC)
176 snprintf(buf, len, "apic %d int %d (irq %d)",
177 APIC_IRQ_APIC(ih),
178 APIC_IRQ_PIN(ih),
179 irq);
180 else
181 snprintf(buf, len, "irq %d", irq);
182 #else
183 snprintf(buf, len, "irq %d", irq);
184 #endif
185 return buf;
186 }
187
188 const struct evcnt *
eisa_intr_evcnt(eisa_chipset_tag_t ec,eisa_intr_handle_t ih)189 eisa_intr_evcnt(eisa_chipset_tag_t ec, eisa_intr_handle_t ih)
190 {
191
192 /* XXX for now, no evcnt parent reported */
193 return NULL;
194 }
195
196 void *
eisa_intr_establish(eisa_chipset_tag_t ec,eisa_intr_handle_t ih,int type,int level,int (* func)(void *),void * arg)197 eisa_intr_establish(eisa_chipset_tag_t ec, eisa_intr_handle_t ih,
198 int type, int level, int (*func)(void *), void *arg)
199 {
200 int pin, irq;
201 struct pic *pic;
202
203 pic = &i8259_pic;
204 pin = irq = ih;
205
206 #if NIOAPIC > 0
207 if (ih & APIC_INT_VIA_APIC) {
208 struct ioapic_softc * const ioapic = ioapic_find(APIC_IRQ_APIC(ih));
209 if (ioapic == NULL) {
210 aprint_normal("eisa_intr_establish: bad ioapic %d\n",
211 APIC_IRQ_APIC(ih));
212 return NULL;
213 }
214 pic = &ioapic->sc_pic;
215 pin = APIC_IRQ_PIN(ih);
216 irq = APIC_IRQ_LEGACY_IRQ(ih);
217 if (irq < 0 || irq >= NUM_LEGACY_IRQS)
218 irq = -1;
219 }
220 #endif
221
222 return intr_establish(irq, pic, pin, type, level, func, arg, false);
223 }
224
225 void
eisa_intr_disestablish(eisa_chipset_tag_t ec,void * cookie)226 eisa_intr_disestablish(eisa_chipset_tag_t ec, void *cookie)
227 {
228
229 intr_disestablish(cookie);
230 }
231
232 int
eisa_conf_read_mem(eisa_chipset_tag_t ec,int slot,int func,int entry,struct eisa_cfg_mem * ecm)233 eisa_conf_read_mem(eisa_chipset_tag_t ec, int slot,
234 int func, int entry, struct eisa_cfg_mem *ecm)
235 {
236
237 /* XXX XXX XXX */
238 return (ENOENT);
239 }
240
241 int
eisa_conf_read_irq(eisa_chipset_tag_t ec,int slot,int func,int entry,struct eisa_cfg_irq * eci)242 eisa_conf_read_irq(eisa_chipset_tag_t ec, int slot,
243 int func, int entry, struct eisa_cfg_irq *eci)
244 {
245
246 /* XXX XXX XXX */
247 return (ENOENT);
248 }
249
250 int
eisa_conf_read_dma(eisa_chipset_tag_t ec,int slot,int func,int entry,struct eisa_cfg_dma * ecd)251 eisa_conf_read_dma(eisa_chipset_tag_t ec, int slot,
252 int func, int entry, struct eisa_cfg_dma *ecd)
253 {
254
255 /* XXX XXX XXX */
256 return (ENOENT);
257 }
258
259 int
eisa_conf_read_io(eisa_chipset_tag_t ec,int slot,int func,int entry,struct eisa_cfg_io * ecio)260 eisa_conf_read_io(eisa_chipset_tag_t ec, int slot,
261 int func, int entry, struct eisa_cfg_io *ecio)
262 {
263
264 /* XXX XXX XXX */
265 return (ENOENT);
266 }
267