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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 <genarch/ofw/ofw.h>
  30. #include <arch/asm.h>
  31. #include <stdarg.h>
  32. #include <cpu.h>
  33. #include <arch/types.h>
  34.  
  35. ofw_entry ofw;
  36.  
  37. phandle ofw_chosen;
  38. ihandle ofw_stdout;
  39.  
  40. void ofw_init(void)
  41. {
  42.     ofw_chosen = ofw_find_device("/chosen");
  43.     if (ofw_chosen == -1)
  44.         ofw_done();
  45.    
  46.     if (ofw_get_property(ofw_chosen, "stdout",  &ofw_stdout, sizeof(ofw_stdout)) <= 0)
  47.         ofw_stdout = 0;
  48. }
  49.  
  50. void ofw_done(void)
  51. {
  52.     (void) ofw_call("exit", 0, 0);
  53.     cpu_halt();
  54. }
  55.  
  56. __native ofw_call(const char *service, const int nargs, const int nret, ...)
  57. {
  58.     va_list list;
  59.     ofw_args_t args;
  60.     int i;
  61.    
  62.     args.service = service;
  63.     args.nargs = nargs;
  64.     args.nret = nret;
  65.    
  66.     va_start(list, nret);
  67.     for (i = 0; i < nargs; i++)
  68.         args.args[i] = va_arg(list, ofw_arg_t);
  69.     va_end(list);
  70.    
  71.     for (i = 0; i < nret; i++)
  72.         args.args[i + nargs] = 0;
  73.    
  74.     ofw(&args);
  75.    
  76.     return args.args[nargs];
  77. }
  78.  
  79. void ofw_putchar(const char ch)
  80. {
  81.     if (ofw_stdout == 0)
  82.         return;
  83.    
  84.     (void) ofw_call("write", 3, 1, ofw_stdout, &ch, 1);
  85. }
  86.  
  87. phandle ofw_find_device(const char *name)
  88. {
  89.     return (phandle) 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 (int) ofw_call("getprop", 4, 1, device, name, buf, buflen);
  95. }
  96.  
  97. void *ofw_claim(const void *addr, const int size, const int align)
  98. {
  99.     return (void *) ofw_call("claim", 3, 1, addr, size, align);
  100. }
  101.