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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 "main.h"
  30.  
  31. ofw_entry ofw;
  32.  
  33. phandle ofw_chosen;
  34. ihandle ofw_stdout;
  35.  
  36. void init(void)
  37. {
  38.     ofw_chosen = ofw_find_device("/chosen");
  39.     if (ofw_chosen == -1)
  40.         ofw_call("exit", 0, 0);
  41.    
  42.     if (ofw_get_property(ofw_chosen, "stdout",  &ofw_stdout, sizeof(ofw_stdout)) <= 0) 
  43.         ofw_stdout = 0;
  44. }
  45.  
  46. int ofw_call(const char *service, const int nargs, const int nret, ...)
  47. {
  48.     va_list list;
  49.     ofw_args_t args;
  50.     int i;
  51.    
  52.     args.service = service;
  53.     args.nargs = nargs;
  54.     args.nret = nret;
  55.    
  56.     va_start(list, nret);
  57.     for (i = 0; i < nargs; i++)
  58.         args.args[i] = va_arg(list, ofw_arg_t);
  59.     va_end(list);
  60.    
  61.     for (i = 0; i < nret; i++)
  62.         args.args[i + nargs] = 0;
  63.    
  64.     ofw(&args);
  65.    
  66.     return args.args[nargs];
  67. }
  68.  
  69. void ofw_write(const char *str, const int len)
  70. {
  71.     if (ofw_stdout == 0)
  72.         return;
  73.    
  74.     ofw_call("write", 3, 1, ofw_stdout, str, len);
  75. }
  76.  
  77. void ofw_puts(const char *str)
  78. {
  79.     int len = 0;
  80.    
  81.     while (str[len] != 0)
  82.         len++;
  83.    
  84.     ofw_write(str, len);
  85. }
  86.  
  87. phandle ofw_find_device(const char *name)
  88. {
  89.     return ofw_call("finddevice", 1, 1, name);
  90. }
  91.  
  92. int ofw_get_property(const phandle device, const char *name, void *buf, const int buflen)
  93. {
  94.     return ofw_call("getprop", 4, 1, device, name, buf, buflen);
  95. }
  96.  
  97. void bootstrap(void)
  98. {
  99.     ofw_puts("\nHelenOS PPC Bootloader\n");
  100.  
  101.     while (1);
  102. }
  103.