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