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  1. /*
  2.  * Copyright (C) 2005 Ondrej Palkovsky
  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 <interrupt.h>
  30. #include <console/chardev.h>
  31. #include <arch/drivers/msim.h>
  32. #include <arch/cp0.h>
  33. #include <console/console.h>
  34.  
  35. static chardev_t console;
  36.  
  37. static void msim_write(chardev_t *dev, const char ch);
  38. static void msim_enable(chardev_t *dev);
  39. static void msim_disable(chardev_t *dev);
  40.  
  41. static chardev_operations_t msim_ops = {
  42.     .resume = msim_enable,
  43.     .suspend = msim_disable,
  44.     .write = msim_write
  45. };
  46.  
  47. /** Putchar that works with MSIM & gxemul */
  48. void msim_write(chardev_t *dev, const char ch)
  49. {
  50.     *((char *) MSIM_VIDEORAM) = ch;
  51. }
  52.  
  53. /* Called from getc(). */
  54. void msim_enable(chardev_t *dev)
  55. {
  56.     cp0_unmask_int(MSIM_KBD_IRQ);
  57. }
  58.  
  59. /* Called from getc(). */
  60. void msim_disable(chardev_t *dev)
  61. {
  62.     cp0_mask_int(MSIM_KBD_IRQ);
  63. }
  64.  
  65. #include <print.h>
  66. /** Process keyboard interrupt. */
  67. static void msim_interrupt(int n, void *stack)
  68. {
  69.     char ch;
  70.  
  71.     ch = *((char *) MSIM_KBD_ADDRESS);
  72.     if (ch =='\r')
  73.         ch = '\n';
  74.     if (ch == 0x7f)
  75.         ch = '\b';
  76.     chardev_push_character(&console, ch);
  77. }
  78.  
  79.  
  80. /* Return console object representing msim console */
  81. void msim_console(void)
  82. {
  83.     chardev_initialize("msim_console", &console, &msim_ops);
  84.  
  85.     int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
  86.  
  87.     cp0_unmask_int(MSIM_KBD_IRQ);
  88.  
  89.     stdin = &console;
  90.     stdout = &console;
  91. }
  92.