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  1. /*
  2.  * Copyright (C) 2005 Martin Decky
  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.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - 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.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include "ofw.h"
  30.  
  31. ofw_entry ofw;
  32.  
  33. phandle ofw_chosen;
  34. ihandle ofw_stdout;
  35.  
  36.  
  37. void init(void)
  38. {
  39.     ofw_chosen = ofw_find_device("/chosen");
  40.     if (ofw_chosen == -1)
  41.         ofw_call("exit", 0, 0);
  42.    
  43.     if (ofw_get_property(ofw_chosen, "stdout",  &ofw_stdout, sizeof(ofw_stdout)) <= 0) 
  44.         ofw_stdout = 0;
  45. }
  46.  
  47.  
  48. int ofw_call(const char *service, const int nargs, const int nret, ...)
  49. {
  50.     va_list list;
  51.     ofw_args_t args;
  52.     int i;
  53.    
  54.     args.service = service;
  55.     args.nargs = nargs;
  56.     args.nret = nret;
  57.    
  58.     va_start(list, nret);
  59.     for (i = 0; i < nargs; i++)
  60.         args.args[i] = va_arg(list, ofw_arg_t);
  61.     va_end(list);
  62.    
  63.     for (i = 0; i < nret; i++)
  64.         args.args[i + nargs] = 0;
  65.    
  66.     ofw(&args);
  67.    
  68.     return args.args[nargs];
  69. }
  70.  
  71.  
  72. void ofw_write(const char *str, const int len)
  73. {
  74.     if (ofw_stdout == 0)
  75.         return;
  76.    
  77.     ofw_call("write", 3, 1, ofw_stdout, str, len);
  78. }
  79.  
  80.  
  81. void ofw_puts(const char *str)
  82. {
  83.     int len = 0;
  84.    
  85.     while (str[len] != 0)
  86.         len++;
  87.    
  88.     ofw_write(str, len);
  89. }
  90.  
  91.  
  92. phandle ofw_find_device(const char *name)
  93. {
  94.     return ofw_call("finddevice", 1, 1, name);
  95. }
  96.  
  97.  
  98. int ofw_get_property(const phandle device, const char *name, const void *buf, const int buflen)
  99. {
  100.     return ofw_call("getprop", 4, 1, device, name, buf, buflen);
  101. }
  102.  
  103.  
  104. void *ofw_claim(const void *addr, const int size, const int align)
  105. {
  106.     return (void *) ofw_call("claim", 3, 1, addr, size, align);
  107. }
  108.