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  1. /*
  2.  * Copyright (C) 2005 Jakub Jermar
  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/ski/ski.h>
  30.  
  31. /** Initialize debug console
  32.  *
  33.  * Issue SSC (Simulator System Call) to
  34.  * to open debug console.
  35.  */
  36. void ski_init_console(void)
  37. {
  38.     __asm__ (
  39.         "mov r15=%0\n"
  40.         "break 0x80000\n"
  41.         :
  42.         : "i" (SKI_INIT_CONSOLE)
  43.         : "r15", "r8"
  44.     );
  45. }
  46.  
  47. /** Display character on debug console
  48.  *
  49.  * Use SSC (Simulator System Call) to
  50.  * display character on debug console.
  51.  *
  52.  * @param ch   Character to be printed.
  53.  */
  54. void ski_putchar(const char ch)
  55. {
  56.     __asm__ (
  57.         "mov r15=%0\n"
  58.         "mov r32=%1\n"      /* r32 is in0 */
  59.         "break 0x80000\n"   /* modifies r8 */
  60.         :
  61.         : "i" (SKI_PUTCHAR), "r" (ch)
  62.         : "r15", "in0", "r8"
  63.     );
  64.    
  65.     if (ch == '\n') ski_putchar('\r');
  66. }
  67.  
  68. /** Ask debug console if a key was pressed.
  69.  *
  70.  * Use SSC (Simulator System Call) to
  71.  * get character from debug console.
  72.  *
  73.  * This call is non-blocking.
  74.  *
  75.  * @return ASCII code of pressed key or 0 if no key pressed.
  76.  */
  77. __s32 ski_getchar(void)
  78. {
  79.     __u64 ch;
  80.    
  81.     __asm__ (
  82.         "mov r15=%0\n"
  83.         "break 0x80000;;\n" /* modifies r8 */
  84.         "mov %1=r8;;\n"    
  85.  
  86.         :
  87.         : "i" (SKI_GETCHAR), "r" (ch)
  88.         : "r15",  "r8"
  89.     );
  90.  
  91.     return (__s32)ch;
  92. }
  93.