Annotation of sys/arch/alpha/mcbus/mcbus.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: mcbus.c,v 1.1 2007/03/16 21:22:27 robert Exp $ */
2: /* $NetBSD: mcbus.c,v 1.19 2007/03/04 05:59:11 christos Exp $ */
3:
4: /*
5: * Copyright (c) 1998 by Matthew Jacob
6: * NASA AMES Research Center.
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice immediately at the beginning of the file, without modification,
14: * this list of conditions, and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. The name of the author may not be used to endorse or promote products
19: * derived from this software without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
25: * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: */
33:
34: /*
35: * Autoconfiguration routines for the MCBUS system
36: * bus found on AlphaServer 4100 systems.
37: */
38:
39: #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
40: #include <sys/param.h>
41: #include <sys/systm.h>
42: #include <sys/device.h>
43: #include <sys/malloc.h>
44:
45: #include <machine/autoconf.h>
46: #include <machine/rpb.h>
47: #include <machine/pte.h>
48:
49: #include <alpha/mcbus/mcbusreg.h>
50: #include <alpha/mcbus/mcbusvar.h>
51:
52: #include <alpha/pci/mcpciareg.h>
53:
54: #define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
55: #define MCPCIA_EXISTS(mid, gid) \
56: (!badaddr((void *)KV(MCPCIA_BRIDGE_ADDR(gid, mid)), sizeof (u_int32_t)))
57:
58: struct mcbus_cpu_busdep mcbus_primary;
59:
60: int mcbusmatch (struct device *, void *, void *);
61: void mcbusattach (struct device *, struct device *, void *);
62: int mcbusprint (void *, const char *);
63: int mcbussbm (struct device *, void *, void *);
64:
65: const char *mcbus_node_type_str (u_int8_t);
66:
67: typedef struct {
68: struct device mcbus_dev;
69: u_int8_t mcbus_types[MCBUS_MID_MAX];
70: } mcbus_softc_t;
71:
72: struct cfattach mcbus_ca = {
73: sizeof(mcbus_softc_t), mcbusmatch, mcbusattach
74: };
75:
76: struct cfdriver mcbus_cd = {
77: NULL, "mcbus", DV_DULL,
78: };
79:
80: /*
81: * Tru64 UNIX (formerly Digital UNIX (formerly DEC OSF/1)) probes for MCPCIAs
82: * in the following order:
83: *
84: * 5, 4, 7, 6
85: *
86: * This is so that the built-in CD-ROM on the internal 53c810 is always
87: * dka500. We probe them in the same order, for consistency.
88: */
89: const int mcbus_mcpcia_probe_order[] = { 5, 4, 7, 6 };
90:
91: extern void mcpcia_config_cleanup (void);
92:
93: int
94: mcbusprint(aux, cp)
95: void *aux;
96: const char *cp;
97: {
98: struct mcbus_dev_attach_args *tap = aux;
99: printf(" mid %d: %s", tap->ma_mid,
100: mcbus_node_type_str(tap->ma_type));
101: return (UNCONF);
102: }
103:
104: int
105: mcbussbm(parent, cf, aux)
106: struct device *parent;
107: void *cf;
108: void *aux;
109: {
110: struct mcbus_dev_attach_args *tap = aux;
111: struct cfdata *mcf = (struct cfdata *)cf;
112:
113: if (mcf->cf_loc[MCBUSCF_MID] != MCBUSCF_MID_DEFAULT &&
114: mcf->cf_loc[MCBUSCF_MID] != tap->ma_mid)
115: return (0);
116:
117:
118: return ((*mcf->cf_attach->ca_match)(parent, mcf, aux));
119: }
120:
121: int
122: mcbusmatch(parent, cf, aux)
123: struct device *parent;
124: void *cf;
125: void *aux;
126: {
127: struct mainbus_attach_args *ma = aux;
128:
129: /* Make sure we're looking for a MCBUS. */
130: if (strcmp(ma->ma_name, mcbus_cd.cd_name) != 0)
131: return (0);
132:
133: /*
134: * Only available on 4100 processor type platforms.
135: */
136: if (cputype != ST_DEC_4100)
137: return (0);
138:
139: return (1);
140: }
141:
142: void
143: mcbusattach(parent, self, aux)
144: struct device *parent;
145: struct device *self;
146: void *aux;
147: {
148: static const char *bcs[CPU_BCacheMask + 1] = {
149: "No", "1MB", "2MB", "4MB",
150: };
151: struct mcbus_dev_attach_args ta;
152: mcbus_softc_t *mbp = (mcbus_softc_t *)self;
153: int i, mid;
154:
155: printf(": %s BCache\n", mcbus_primary.mcbus_valid ?
156: bcs[mcbus_primary.mcbus_bcache] : "Unknown");
157:
158: mbp->mcbus_types[0] = MCBUS_TYPE_RES;
159: for (mid = 1; mid <= MCBUS_MID_MAX; ++mid)
160: mbp->mcbus_types[mid] = MCBUS_TYPE_UNK;
161:
162: /*
163: * Find and "configure" memory.
164: */
165: ta.ma_name = mcbus_cd.cd_name;
166: ta.ma_gid = MCBUS_GID_FROM_INSTANCE(0);
167: ta.ma_mid = 1;
168: ta.ma_type = MCBUS_TYPE_MEM;
169: mbp->mcbus_types[1] = MCBUS_TYPE_MEM;
170:
171: (void) config_found_sm(self, &ta, mcbusprint, mcbussbm);
172:
173: /*
174: * Now find PCI busses.
175: */
176: for (i = 0; i < MCPCIA_PER_MCBUS; i++) {
177: mid = mcbus_mcpcia_probe_order[i];
178: ta.ma_name = mcbus_cd.cd_name;
179: ta.ma_gid = MCBUS_GID_FROM_INSTANCE(0);
180: ta.ma_mid = mid;
181: ta.ma_type = MCBUS_TYPE_PCI;
182: if (MCPCIA_EXISTS(ta.ma_mid, ta.ma_gid))
183: (void) config_found_sm(self, &ta, mcbusprint,
184: mcbussbm);
185: }
186:
187: mcpcia_config_cleanup();
188: }
189:
190: const char *
191: mcbus_node_type_str(type)
192: u_int8_t type;
193: {
194: switch (type) {
195: case MCBUS_TYPE_RES:
196: panic ("RESERVED TYPE IN MCBUS_NODE_TYPE_STR");
197: break;
198: case MCBUS_TYPE_UNK:
199: panic ("UNKNOWN TYPE IN MCBUS_NODE_TYPE_STR");
200: break;
201: case MCBUS_TYPE_MEM:
202: return ("Memory");
203: case MCBUS_TYPE_CPU:
204: return ("CPU");
205: case MCBUS_TYPE_PCI:
206: return ("PCI Bridge");
207: default:
208: panic("REALLY UNKNWON (%x) TYPE IN MCBUS_NODE_TYPE_STR", type);
209: break;
210: }
211: }
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