1 /*-
2 * Copyright (c) 2005 Peter Grehan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/11.2/sys/arm/include/platformvar.h 331907 2018-04-03 06:06:39Z gonzo $
27 */
28
29 #ifndef _MACHINE_PLATFORMVAR_H_
30 #define _MACHINE_PLATFORMVAR_H_
31
32 /*
33 * An ARM platform implementation is declared with a kernel object and
34 * an associated method table, similar to a device driver.
35 *
36 * e.g.
37 *
38 * static platform_method_t bcm2835_methods[] = {
39 * PLATFORMMETHOD(platform_probe, bcm2835_probe),
40 * ...
41 * PLATFORMMETHOD_END
42 * };
43 *
44 * static platform_def_t bcm3835_platform = {
45 * "bcm2835",
46 * bcm2835_methods,
47 * sizeof(bcm2835_platform_softc), // or 0 if no softc
48 * };
49 *
50 * PLATFORM_DEF(bcm2835_platform);
51 */
52
53 #include <sys/kobj.h>
54 #include <sys/linker_set.h>
55
56 struct platform_class {
57 KOBJ_CLASS_FIELDS;
58
59 /* How many times to loop to delay approximately 1us */
60 int delay_count;
61 };
62
63 struct platform_kobj {
64 /*
65 * A platform instance is a kernel object
66 */
67 KOBJ_FIELDS;
68
69 /* Platform class, for access to class specific data */
70 struct platform_class *cls;
71 };
72
73 struct platform_data {
74 int delay_count;
75 };
76
77 typedef struct platform_kobj *platform_t;
78 typedef struct platform_class platform_def_t;
79 #define platform_method_t kobj_method_t
80
81 #define PLATFORMMETHOD KOBJMETHOD
82 #define PLATFORMMETHOD_END KOBJMETHOD_END
83
84 #define PLATFORM_DEF(name) DATA_SET(platform_set, name)
85
86 #ifdef FDT
87 struct fdt_platform_class {
88 KOBJ_CLASS_FIELDS;
89
90 const char *fdt_compatible;
91 };
92
93 typedef struct fdt_platform_class fdt_platform_def_t;
94
95 extern platform_method_t fdt_platform_methods[];
96
97 #ifdef MULTIDELAY
98 #define FDT_PLATFORM_CTASSERT(delay) CTASSERT(delay > 0)
99 #else
100 #define FDT_PLATFORM_CTASSERT(delay)
101 #endif
102
103 #define PLATFORM_DATA(NAME, delay) \
104 static struct platform_data NAME ## _platc = { \
105 .delay_count = delay; \
106 };
107
108 #define FDT_PLATFORM_DEF2(NAME, VAR_NAME, NAME_STR, size, compatible, \
109 delay) \
110 FDT_PLATFORM_CTASSERT(delay); \
111 static fdt_platform_def_t VAR_NAME ## _fdt_platform = { \
112 .name = NAME_STR, \
113 .methods = fdt_platform_methods, \
114 .fdt_compatible = compatible, \
115 }; \
116 static kobj_class_t VAR_NAME ## _baseclasses[] = \
117 { (kobj_class_t)&VAR_NAME ## _fdt_platform, NULL }; \
118 static platform_def_t VAR_NAME ## _platform = { \
119 NAME_STR, \
120 NAME ## _methods, \
121 size, \
122 VAR_NAME ## _baseclasses, \
123 delay, \
124 }; \
125 DATA_SET(platform_set, VAR_NAME ## _platform)
126
127 #define FDT_PLATFORM_DEF(NAME, NAME_STR, size, compatible, delay) \
128 FDT_PLATFORM_DEF2(NAME, NAME, NAME_STR, size, compatible, delay)
129
130 #endif
131
132 bool arm_tmr_timed_wait(platform_t, int);
133
134 #endif /* _MACHINE_PLATFORMVAR_H_ */
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