1 /* $NetBSD: mainbus.c,v 1.23 2021/08/07 16:18:57 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1996 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, 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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.23 2021/08/07 16:18:57 thorpej Exp $");
34
35 #include <sys/param.h>
36 #include <sys/device.h>
37 #include <sys/systm.h>
38
39 #define _M68K_BUS_DMA_PRIVATE
40 #include <machine/autoconf.h>
41
42 static int mainbus_match(device_t, cfdata_t, void *);
43 static void mainbus_attach(device_t, device_t, void *);
44 static int mainbus_search(device_t, cfdata_t,
45 const int *ldesc, void *);
46
47 CFATTACH_DECL_NEW(mainbus, 0,
48 mainbus_match, mainbus_attach, NULL, NULL);
49
50 struct m68k_bus_dma_tag mac68k_bus_dma_tag = {
51 NULL, /* _cookie */
52
53 0, /* _boundary */
54
55 _bus_dmamap_create, /* _dmamap_create */
56 _bus_dmamap_destroy, /* _dmamap_destroy */
57 _bus_dmamap_load_direct, /* _dmamap_load */
58 _bus_dmamap_load_mbuf_direct, /* _dmamap_load_mbuf */
59 _bus_dmamap_load_uio_direct, /* _dmamap_load_uio */
60 _bus_dmamap_load_raw_direct, /* _dmamap_load_raw */
61 _bus_dmamap_unload, /* _dmamap_unload */
62 _bus_dmamap_sync, /* _dmamap_sync */
63
64 _bus_dmamem_alloc, /* _dmamem_alloc */
65 _bus_dmamem_free, /* _dmamem_free */
66 _bus_dmamem_map, /* _dmamem_map */
67 _bus_dmamem_unmap, /* _dmamem_unmap */
68 _bus_dmamem_mmap /* _dmamem_mmap */
69 };
70
71 static int
mainbus_match(device_t parent,cfdata_t cf,void * aux)72 mainbus_match(device_t parent, cfdata_t cf, void *aux)
73 {
74 static int mainbus_matched = 0;
75
76 /* Allow only one instance. */
77 if (mainbus_matched)
78 return (0);
79
80 mainbus_matched = 1;
81 return 1;
82 }
83
84 static void
mainbus_attach(device_t parent,device_t self,void * aux)85 mainbus_attach(device_t parent, device_t self, void *aux)
86 {
87 struct mainbus_attach_args mba;
88
89 printf("\n");
90
91 mba.mba_bst = MAC68K_BUS_SPACE_MEM;
92 mba.mba_dmat = &mac68k_bus_dma_tag;
93
94 /* Search for and attach children. */
95 config_search(self, &mba,
96 CFARGS(.search = mainbus_search));
97 }
98
99 static int
mainbus_search(device_t parent,cfdata_t cf,const int * ldesc,void * aux)100 mainbus_search(device_t parent, cfdata_t cf,
101 const int *ldesc, void *aux)
102 {
103 if (config_probe(parent, cf, aux))
104 config_attach(parent, cf, aux, NULL, CFARGS_NONE);
105 return 0;
106 }
107