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1.1 nbrk 1: /* $OpenBSD: lca_pci.c,v 1.9 2006/03/26 20:23:08 brad Exp $ */
2: /* $NetBSD: lca_pci.c,v 1.13 1997/09/02 13:19:35 thorpej 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/lcareg.h>
43: #include <alpha/pci/lcavar.h>
44:
45: void lca_attach_hook(struct device *, struct device *,
46: struct pcibus_attach_args *);
47: int lca_bus_maxdevs(void *, int);
48: pcitag_t lca_make_tag(void *, int, int, int);
49: void lca_decompose_tag(void *, pcitag_t, int *, int *,
50: int *);
51: pcireg_t lca_conf_read(void *, pcitag_t, int);
52: void lca_conf_write(void *, pcitag_t, int, pcireg_t);
53:
54: void
55: lca_pci_init(pc, v)
56: pci_chipset_tag_t pc;
57: void *v;
58: {
59:
60: pc->pc_conf_v = v;
61: pc->pc_attach_hook = lca_attach_hook;
62: pc->pc_bus_maxdevs = lca_bus_maxdevs;
63: pc->pc_make_tag = lca_make_tag;
64: pc->pc_decompose_tag = lca_decompose_tag;
65: pc->pc_conf_read = lca_conf_read;
66: pc->pc_conf_write = lca_conf_write;
67: }
68:
69: void
70: lca_attach_hook(parent, self, pba)
71: struct device *parent, *self;
72: struct pcibus_attach_args *pba;
73: {
74: }
75:
76: int
77: lca_bus_maxdevs(cpv, busno)
78: void *cpv;
79: int busno;
80: {
81:
82: if (busno == 0)
83: return 16;
84: else
85: return 32;
86: }
87:
88: pcitag_t
89: lca_make_tag(cpv, b, d, f)
90: void *cpv;
91: int b, d, f;
92: {
93:
94: return (b << 16) | (d << 11) | (f << 8);
95: }
96:
97: void
98: lca_decompose_tag(cpv, tag, bp, dp, fp)
99: void *cpv;
100: pcitag_t tag;
101: int *bp, *dp, *fp;
102: {
103:
104: if (bp != NULL)
105: *bp = (tag >> 16) & 0xff;
106: if (dp != NULL)
107: *dp = (tag >> 11) & 0x1f;
108: if (fp != NULL)
109: *fp = (tag >> 8) & 0x7;
110: }
111:
112: pcireg_t
113: lca_conf_read(cpv, tag, offset)
114: void *cpv;
115: pcitag_t tag;
116: int offset;
117: {
118: struct lca_config *lcp = cpv;
119: pcireg_t *datap, data;
120: int s, secondary, device, ba;
121:
122: s = 0; /* XXX gcc -Wuninitialized */
123:
124: /* secondary if bus # != 0 */
125: pci_decompose_tag(&lcp->lc_pc, tag, &secondary, &device, 0);
126: if (secondary) {
127: s = splhigh();
128: alpha_mb();
129: REGVAL(LCA_IOC_CONF) = 0x01;
130: alpha_mb();
131: } else {
132: /*
133: * on the LCA, must frob the tag used for
134: * devices on the primary bus, in the same ways
135: * as is used by type 1 configuration cycles
136: * on PCs.
137: */
138: tag = (1 << (device + 11)) | (tag & 0x7ff);
139: }
140:
141: datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(LCA_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(LCA_IOC_CONF) = 0x00;
153: alpha_mb();
154: splx(s);
155: }
156:
157: #if 0
158: printf("lca_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
166: lca_conf_write(cpv, tag, offset, data)
167: void *cpv;
168: pcitag_t tag;
169: int offset;
170: pcireg_t data;
171: {
172: struct lca_config *lcp = cpv;
173: pcireg_t *datap;
174: int s, secondary, device;
175:
176: s = 0; /* XXX gcc -Wuninitialized */
177:
178: /* secondary if bus # != 0 */
179: pci_decompose_tag(&lcp->lc_pc, tag, &secondary, &device, 0);
180: if (secondary) {
181: s = splhigh();
182: alpha_mb();
183: REGVAL(LCA_IOC_CONF) = 0x01;
184: alpha_mb();
185: } else {
186: /*
187: * on the LCA, must frob the tag used for
188: * devices on the primary bus, in the same ways
189: * as is used by type 1 configuration cycles
190: * on PCs.
191: */
192: tag = (1 << (device + 11)) | (tag & 0x7ff);
193: }
194:
195: datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(LCA_PCI_CONF |
196: tag << 5UL | /* XXX */
197: (offset & ~0x03) << 5 | /* XXX */
198: 0 << 5 | /* XXX */
199: 0x3 << 3); /* XXX */
200: *datap = data;
201:
202: if (secondary) {
203: alpha_mb();
204: REGVAL(LCA_IOC_CONF) = 0x00;
205: alpha_mb();
206: splx(s);
207: }
208:
209: #if 0
210: printf("lca_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag,
211: reg, data, datap);
212: #endif
213: }