1 /* $NetBSD: mainbus.c,v 1.35 2021/08/07 16:18:47 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Christopher G. Demetriou
17 * for the NetBSD Project.
18 * 4. 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 ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.35 2021/08/07 16:18:47 thorpej Exp $");
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/device.h>
39 #include <sys/kmem.h>
40
41 #include <machine/autoconf.h>
42 #include <sys/bus.h>
43
44 #include "pci.h"
45 #include "opt_pci.h"
46 #include <dev/pci/pcivar.h>
47 #include <dev/pci/pciconf.h>
48 #include <machine/pci_machdep.h>
49 #include <machine/isa_machdep.h>
50
51 int mainbus_match(device_t, cfdata_t, void *);
52 void mainbus_attach(device_t, device_t, void *);
53
54 CFATTACH_DECL_NEW(mainbus, 0,
55 mainbus_match, mainbus_attach, NULL, NULL);
56
57 int mainbus_print (void *, const char *);
58
59 union mainbus_attach_args {
60 const char *mba_busname; /* first elem of all */
61 struct pcibus_attach_args mba_pba;
62 };
63
64
65 /* There can be only one */
66 int mainbus_found = 0;
67 struct powerpc_isa_chipset genppc_ict;
68 struct genppc_pci_chipset *genppc_pct;
69
70 #define PCI_IO_START 0x00008000
71 #define PCI_IO_END 0x0000ffff
72 #define PCI_IO_SIZE ((PCI_IO_END - PCI_IO_START) + 1)
73
74 #define PCI_MEM_START 0x00000000
75 #define PCI_MEM_END 0x0fffffff
76 #define PCI_MEM_SIZE ((PCI_MEM_END - PCI_MEM_START) + 1)
77
78 /*
79 * Probe for the mainbus; always succeeds.
80 */
81 int
mainbus_match(device_t parent,cfdata_t match,void * aux)82 mainbus_match(device_t parent, cfdata_t match, void *aux)
83 {
84 return 1;
85 }
86
87 /*
88 * Attach the mainbus.
89 */
90 void
mainbus_attach(device_t parent,device_t self,void * aux)91 mainbus_attach(device_t parent, device_t self, void *aux)
92 {
93 union mainbus_attach_args mba;
94 struct confargs ca;
95
96 #if NPCI > 0
97 struct genppc_pci_chipset_businfo *pbi;
98 #endif
99
100 mainbus_found = 1;
101
102 aprint_normal("\n");
103
104 #if defined(RESIDUAL_DATA_DUMP)
105 print_residual_device_info();
106 #endif
107
108 /*
109 * Always find the CPU
110 */
111 ca.ca_name = "cpu";
112 ca.ca_node = 0;
113 config_found(self, &ca, mainbus_print,
114 CFARGS(.iattr = "mainbus"));
115 ca.ca_name = "cpu";
116 ca.ca_node = 1;
117 config_found(self, &ca, mainbus_print,
118 CFARGS(.iattr = "mainbus"));
119
120 /*
121 * XXX Note also that the presence of a PCI bus should
122 * XXX _always_ be checked, and if present the bus should be
123 * XXX 'found'. However, because of the structure of the code,
124 * XXX that's not currently possible.
125 */
126
127 #if NPCI > 0
128 genppc_pct = kmem_alloc(sizeof(struct genppc_pci_chipset), KM_SLEEP);
129 bebox_pci_get_chipset_tag(genppc_pct);
130
131 pbi = kmem_alloc(sizeof(struct genppc_pci_chipset_businfo), KM_SLEEP);
132 pbi->pbi_properties = prop_dictionary_create();
133 KASSERT(pbi->pbi_properties != NULL);
134
135 SIMPLEQ_INIT(&genppc_pct->pc_pbi);
136 SIMPLEQ_INSERT_TAIL(&genppc_pct->pc_pbi, pbi, next);
137
138 #ifdef PCI_NETBSD_CONFIGURE
139 struct pciconf_resources *pcires = pciconf_resource_init();
140
141 pciconf_resource_add(pcires, PCICONF_RESOURCE_IO,
142 PCI_IO_START, PCI_IO_SIZE);
143 pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM,
144 PCI_MEM_START, PCI_MEM_SIZE);
145
146 pci_configure_bus(genppc_pct, pcires, 0, CACHELINESIZE);
147
148 pciconf_resource_fini(pcires);
149 #endif /* PCI_NETBSD_CONFIGURE */
150 #endif /* NPCI */
151
152 #if NPCI > 0
153 memset(&mba, 0, sizeof(mba));
154 mba.mba_pba.pba_iot = &prep_io_space_tag;
155 mba.mba_pba.pba_memt = &prep_mem_space_tag;
156 mba.mba_pba.pba_dmat = &pci_bus_dma_tag;
157 mba.mba_pba.pba_dmat64 = NULL;
158 mba.mba_pba.pba_pc = genppc_pct;
159 mba.mba_pba.pba_bus = 0;
160 mba.mba_pba.pba_bridgetag = NULL;
161 mba.mba_pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY;
162 config_found(self, &mba.mba_pba, pcibusprint,
163 CFARGS(.iattr = "pcibus"));
164 #endif /* NPCI */
165
166 #ifdef RESIDUAL_DATA_DUMP
167 SIMPLEQ_FOREACH(pbi, &genppc_pct->pc_pbi, next)
168 printf("%s\n", prop_dictionary_externalize(pbi->pbi_properties));
169 #endif
170
171 }
172
173 int
mainbus_print(void * aux,const char * pnp)174 mainbus_print(void *aux, const char *pnp)
175 {
176
177 if (pnp)
178 aprint_normal("cpu at %s", pnp);
179 return (UNCONF);
180 }
181