1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
|
/* $OpenBSD: cia_pci.c,v 1.12 2010/12/04 17:06:31 miod Exp $ */
/* $NetBSD: cia_pci.c,v 1.25 2000/06/29 08:58:46 mrg Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <uvm/uvm_extern.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/ciareg.h>
#include <alpha/pci/ciavar.h>
void cia_attach_hook(struct device *, struct device *,
struct pcibus_attach_args *);
int cia_bus_maxdevs(void *, int);
pcitag_t cia_make_tag(void *, int, int, int);
void cia_decompose_tag(void *, pcitag_t, int *, int *,
int *);
int cia_conf_size(void *, pcitag_t);
pcireg_t cia_conf_read(void *, pcitag_t, int);
void cia_conf_write(void *, pcitag_t, int, pcireg_t);
void
cia_pci_init(pc, v)
pci_chipset_tag_t pc;
void *v;
{
pc->pc_conf_v = v;
pc->pc_attach_hook = cia_attach_hook;
pc->pc_bus_maxdevs = cia_bus_maxdevs;
pc->pc_make_tag = cia_make_tag;
pc->pc_decompose_tag = cia_decompose_tag;
pc->pc_conf_size = cia_conf_size;
pc->pc_conf_read = cia_conf_read;
pc->pc_conf_write = cia_conf_write;
}
void
cia_attach_hook(parent, self, pba)
struct device *parent, *self;
struct pcibus_attach_args *pba;
{
}
int
cia_bus_maxdevs(cpv, busno)
void *cpv;
int busno;
{
return 32;
}
pcitag_t
cia_make_tag(cpv, b, d, f)
void *cpv;
int b, d, f;
{
return (b << 16) | (d << 11) | (f << 8);
}
void
cia_decompose_tag(cpv, tag, bp, dp, fp)
void *cpv;
pcitag_t tag;
int *bp, *dp, *fp;
{
if (bp != NULL)
*bp = (tag >> 16) & 0xff;
if (dp != NULL)
*dp = (tag >> 11) & 0x1f;
if (fp != NULL)
*fp = (tag >> 8) & 0x7;
}
int
cia_conf_size(void *cpv, pcitag_t tag)
{
return PCI_CONFIG_SPACE_SIZE;
}
pcireg_t
cia_conf_read(cpv, tag, offset)
void *cpv;
pcitag_t tag;
int offset;
{
struct cia_config *ccp = cpv;
pcireg_t *datap, data;
int s, secondary, ba;
u_int32_t old_cfg, errbits;
#ifdef __GNUC__
s = 0; /* XXX gcc -Wuninitialized */
old_cfg = 0; /* XXX gcc -Wuninitialized */
#endif
/*
* Some (apparently common) revisions of EB164 and AlphaStation
* firmware do the Wrong thing with PCI master and target aborts,
* which are caused by accessing the configuration space of devices
* that don't exist (for example).
*
* To work around this, we clear the CIA error register's PCI
* master and target abort bits before touching PCI configuration
* space and check it afterwards. If it indicates a master or target
* abort, the device wasn't there so we return 0xffffffff.
*/
REGVAL(CIA_CSR_CIA_ERR) = CIA_ERR_RCVD_MAS_ABT|CIA_ERR_RCVD_TAR_ABT;
alpha_mb();
alpha_pal_draina();
/* secondary if bus # != 0 */
pci_decompose_tag(&ccp->cc_pc, tag, &secondary, 0, 0);
if (secondary) {
s = splhigh();
old_cfg = REGVAL(CIA_CSR_CFG);
alpha_mb();
REGVAL(CIA_CSR_CFG) = old_cfg | 0x1;
alpha_mb();
}
/*
* We just inline the BWX support, since this is the only
* difference between BWX and swiz for config space.
*/
if (ccp->cc_flags & CCF_PCI_USE_BWX) {
if (secondary) {
datap =
(pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_EV56_BWCONF1 |
tag | (offset & ~0x03));
} else {
datap =
(pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_EV56_BWCONF0 |
tag | (offset & ~0x03));
}
} else {
datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_PCI_CONF |
tag << 5UL | /* XXX */
(offset & ~0x03) << 5 | /* XXX */
0 << 5 | /* XXX */
0x3 << 3); /* XXX */
}
data = (pcireg_t)-1;
alpha_mb();
if (!(ba = badaddr(datap, sizeof *datap)))
data = *datap;
alpha_mb();
alpha_mb();
if (secondary) {
alpha_mb();
REGVAL(CIA_CSR_CFG) = old_cfg;
alpha_mb();
splx(s);
}
alpha_pal_draina();
alpha_mb();
errbits = REGVAL(CIA_CSR_CIA_ERR);
if (errbits & (CIA_ERR_RCVD_MAS_ABT|CIA_ERR_RCVD_TAR_ABT)) {
ba = 1;
data = 0xffffffff;
}
if (errbits) {
REGVAL(CIA_CSR_CIA_ERR) = errbits;
alpha_mb();
alpha_pal_draina();
}
#if 0
printf("cia_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg,
data, datap, ba ? " (badaddr)" : "");
#endif
return data;
}
void
cia_conf_write(cpv, tag, offset, data)
void *cpv;
pcitag_t tag;
int offset;
pcireg_t data;
{
struct cia_config *ccp = cpv;
pcireg_t *datap;
int s, secondary;
u_int32_t old_cfg;
#ifdef __GNUC__
s = 0; /* XXX gcc -Wuninitialized */
old_cfg = 0; /* XXX gcc -Wuninitialized */
#endif
/* secondary if bus # != 0 */
pci_decompose_tag(&ccp->cc_pc, tag, &secondary, 0, 0);
if (secondary) {
s = splhigh();
old_cfg = REGVAL(CIA_CSR_CFG);
alpha_mb();
REGVAL(CIA_CSR_CFG) = old_cfg | 0x1;
alpha_mb();
}
/*
* We just inline the BWX support, since this is the only
* difference between BWX and swiz for config space.
*/
if (ccp->cc_flags & CCF_PCI_USE_BWX) {
if (secondary) {
datap =
(pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_EV56_BWCONF1 |
tag | (offset & ~0x03));
} else {
datap =
(pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_EV56_BWCONF0 |
tag | (offset & ~0x03));
}
} else {
datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(CIA_PCI_CONF |
tag << 5UL | /* XXX */
(offset & ~0x03) << 5 | /* XXX */
0 << 5 | /* XXX */
0x3 << 3); /* XXX */
}
alpha_mb();
*datap = data;
alpha_mb();
alpha_mb();
if (secondary) {
alpha_mb();
REGVAL(CIA_CSR_CFG) = old_cfg;
alpha_mb();
splx(s);
}
#if 0
printf("cia_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag,
reg, data, datap);
#endif
}
|
