sys/arm/include/platformvar.h

   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  * $FreeBSD$
  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 typedef struct platform_kobj    *platform_t;
  74 typedef struct platform_class   platform_def_t;
  75 #define platform_method_t       kobj_method_t
  76
  77 #define PLATFORMMETHOD          KOBJMETHOD
  78 #define PLATFORMMETHOD_END      KOBJMETHOD_END
  79
  80 #define PLATFORM_DEF(name)      DATA_SET(platform_set, name)
  81
  82 #ifdef FDT
  83 struct fdt_platform_class {
  84         KOBJ_CLASS_FIELDS;
  85
  86         const char *fdt_compatible;
  87 };
  88
  89 typedef struct fdt_platform_class fdt_platform_def_t;
  90
  91 extern platform_method_t fdt_platform_methods[];
  92
  93 #ifdef MULTIDELAY
  94 #define FDT_PLATFORM_CTASSERT(delay)    CTASSERT(delay > 0)
  95 #else
  96 #define FDT_PLATFORM_CTASSERT(delay)
  97 #endif
  98
  99 #define FDT_PLATFORM_DEF2(NAME, VAR_NAME, NAME_STR, size, compatible,   \
 100     delay)                                                              \
 101 FDT_PLATFORM_CTASSERT(delay);                                           \
 102 static fdt_platform_def_t VAR_NAME ## _fdt_platform = {                 \
 103         .name = NAME_STR,                                               \
 104         .methods = fdt_platform_methods,                                \
 105         .fdt_compatible = compatible,                                   \
 106 };                                                                      \
 107 static kobj_class_t VAR_NAME ## _baseclasses[] =                        \
 108         { (kobj_class_t)&VAR_NAME ## _fdt_platform, NULL };             \
 109 static platform_def_t VAR_NAME ## _platform = {                         \
 110         NAME_STR,                                                       \
 111         NAME ## _methods,                                               \
 112         size,                                                           \
 113         VAR_NAME ## _baseclasses,                                       \
 114         delay,                                                          \
 115 };                                                                      \
 116 DATA_SET(platform_set, VAR_NAME ## _platform)
 117
 118 #define FDT_PLATFORM_DEF(NAME, NAME_STR, size, compatible, delay)       \
 119     FDT_PLATFORM_DEF2(NAME, NAME, NAME_STR, size, compatible, delay)
 120
 121 #endif
 122
 123 bool arm_tmr_timed_wait(platform_t, int);
 124
 125 #endif /* _MACHINE_PLATFORMVAR_H_ */