1 /* $OpenBSD: apecs_pci.c,v 1.12 2015/10/30 07:51:49 miod Exp $ */
2 /* $NetBSD: apecs_pci.c,v 1.10 1996/11/13 21:13:25 cgd Exp $ */
3
4 /*
5 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
6 * All rights reserved.
7 *
8 * Author: Chris G. Demetriou
9 *
10 * Permission to use, copy, modify and distribute this software and
11 * its documentation is hereby granted, provided that both the copyright
12 * notice and this permission notice appear in all copies of the
13 * software, derivative works or modified versions, and any portions
14 * thereof, and that both notices appear in supporting documentation.
15 *
16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19 *
20 * Carnegie Mellon requests users of this software to return to
21 *
22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
23 * School of Computer Science
24 * Carnegie Mellon University
25 * Pittsburgh PA 15213-3890
26 *
27 * any improvements or extensions that they make and grant Carnegie the
28 * rights to redistribute these changes.
29 */
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/device.h>
35
36 #include <uvm/uvm_extern.h>
37
38 #include <machine/autoconf.h> /* badaddr() proto */
39
40 #include <dev/pci/pcireg.h>
41 #include <dev/pci/pcivar.h>
42 #include <alpha/pci/apecsreg.h>
43 #include <alpha/pci/apecsvar.h>
44
45 void apecs_attach_hook(struct device *, struct device *,
46 struct pcibus_attach_args *);
47 int apecs_bus_maxdevs(void *, int);
48 pcitag_t apecs_make_tag(void *, int, int, int);
49 void apecs_decompose_tag(void *, pcitag_t, int *, int *,
50 int *);
51 int apecs_conf_size(void *, pcitag_t);
52 pcireg_t apecs_conf_read(void *, pcitag_t, int);
53 void apecs_conf_write(void *, pcitag_t, int, pcireg_t);
54
55 void
apecs_pci_init(pc,v)56 apecs_pci_init(pc, v)
57 pci_chipset_tag_t pc;
58 void *v;
59 {
60
61 pc->pc_conf_v = v;
62 pc->pc_attach_hook = apecs_attach_hook;
63 pc->pc_bus_maxdevs = apecs_bus_maxdevs;
64 pc->pc_make_tag = apecs_make_tag;
65 pc->pc_decompose_tag = apecs_decompose_tag;
66 pc->pc_conf_size = apecs_conf_size;
67 pc->pc_conf_read = apecs_conf_read;
68 pc->pc_conf_write = apecs_conf_write;
69 }
70
71 void
apecs_attach_hook(parent,self,pba)72 apecs_attach_hook(parent, self, pba)
73 struct device *parent, *self;
74 struct pcibus_attach_args *pba;
75 {
76 }
77
78 int
apecs_bus_maxdevs(cpv,busno)79 apecs_bus_maxdevs(cpv, busno)
80 void *cpv;
81 int busno;
82 {
83
84 return 32;
85 }
86
87 pcitag_t
apecs_make_tag(cpv,b,d,f)88 apecs_make_tag(cpv, b, d, f)
89 void *cpv;
90 int b, d, f;
91 {
92
93 return (b << 16) | (d << 11) | (f << 8);
94 }
95
96 void
apecs_decompose_tag(cpv,tag,bp,dp,fp)97 apecs_decompose_tag(cpv, tag, bp, dp, fp)
98 void *cpv;
99 pcitag_t tag;
100 int *bp, *dp, *fp;
101 {
102
103 if (bp != NULL)
104 *bp = (tag >> 16) & 0xff;
105 if (dp != NULL)
106 *dp = (tag >> 11) & 0x1f;
107 if (fp != NULL)
108 *fp = (tag >> 8) & 0x7;
109 }
110
111 int
apecs_conf_size(void * cpv,pcitag_t tag)112 apecs_conf_size(void *cpv, pcitag_t tag)
113 {
114 return PCI_CONFIG_SPACE_SIZE;
115 }
116
117 pcireg_t
apecs_conf_read(cpv,tag,offset)118 apecs_conf_read(cpv, tag, offset)
119 void *cpv;
120 pcitag_t tag;
121 int offset;
122 {
123 struct apecs_config *acp = cpv;
124 pcireg_t *datap, data;
125 int s, secondary, ba;
126 int32_t old_haxr2; /* XXX */
127
128 s = 0; /* XXX gcc -Wuninitialized */
129 old_haxr2 = 0; /* XXX gcc -Wuninitialized */
130
131 /* secondary if bus # != 0 */
132 pci_decompose_tag(&acp->ac_pc, tag, &secondary, NULL, NULL);
133 if (secondary) {
134 s = splhigh();
135 old_haxr2 = REGVAL(EPIC_HAXR2);
136 alpha_mb();
137 REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1;
138 alpha_mb();
139 }
140
141 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF |
142 tag << 5UL | /* XXX */
143 (offset & ~0x03) << 5 | /* XXX */
144 0 << 5 | /* XXX */
145 0x3 << 3); /* XXX */
146 data = (pcireg_t)-1;
147 if (!(ba = badaddr(datap, sizeof *datap)))
148 data = *datap;
149
150 if (secondary) {
151 alpha_mb();
152 REGVAL(EPIC_HAXR2) = old_haxr2;
153 alpha_mb();
154 splx(s);
155 }
156
157 #if 0
158 printf("apecs_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg,
159 data, datap, ba ? " (badaddr)" : "");
160 #endif
161
162 return data;
163 }
164
165 void
apecs_conf_write(cpv,tag,offset,data)166 apecs_conf_write(cpv, tag, offset, data)
167 void *cpv;
168 pcitag_t tag;
169 int offset;
170 pcireg_t data;
171 {
172 struct apecs_config *acp = cpv;
173 pcireg_t *datap;
174 int s, secondary;
175 int32_t old_haxr2; /* XXX */
176
177 s = 0; /* XXX gcc -Wuninitialized */
178 old_haxr2 = 0; /* XXX gcc -Wuninitialized */
179
180 /* secondary if bus # != 0 */
181 pci_decompose_tag(&acp->ac_pc, tag, &secondary, NULL, NULL);
182 if (secondary) {
183 s = splhigh();
184 old_haxr2 = REGVAL(EPIC_HAXR2);
185 alpha_mb();
186 REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1;
187 alpha_mb();
188 }
189
190 datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF |
191 tag << 5UL | /* XXX */
192 (offset & ~0x03) << 5 | /* XXX */
193 0 << 5 | /* XXX */
194 0x3 << 3); /* XXX */
195
196 alpha_mb();
197 *datap = data;
198 alpha_mb();
199 alpha_mb();
200
201 if (secondary) {
202 alpha_mb();
203 REGVAL(EPIC_HAXR2) = old_haxr2;
204 alpha_mb();
205 splx(s);
206 }
207
208 #if 0
209 printf("apecs_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag,
210 reg, data, datap);
211 #endif
212 }
213