Subversion Repositories HelenOS-historic

Rev

Rev 1702 | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  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.  /** @addtogroup mips32
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <interrupt.h>
  36. #include <console/chardev.h>
  37. #include <arch/drivers/msim.h>
  38. #include <arch/cp0.h>
  39. #include <console/console.h>
  40.  
  41. static chardev_t console;
  42.  
  43. static void msim_write(chardev_t *dev, const char ch);
  44. static void msim_enable(chardev_t *dev);
  45. static void msim_disable(chardev_t *dev);
  46. static char msim_do_read(chardev_t *dev);
  47.  
  48. static chardev_operations_t msim_ops = {
  49.     .resume = msim_enable,
  50.     .suspend = msim_disable,
  51.     .write = msim_write,
  52.     .read = msim_do_read,
  53. };
  54.  
  55. /** Putchar that works with MSIM & gxemul */
  56. void msim_write(chardev_t *dev, const char ch)
  57. {
  58.     *((char *) MSIM_VIDEORAM) = ch;
  59. }
  60.  
  61. /* Called from getc(). */
  62. void msim_enable(chardev_t *dev)
  63. {
  64.     cp0_unmask_int(MSIM_KBD_IRQ);
  65. }
  66.  
  67. /* Called from getc(). */
  68. void msim_disable(chardev_t *dev)
  69. {
  70.     cp0_mask_int(MSIM_KBD_IRQ);
  71. }
  72.  
  73. #include <print.h>
  74. /** Read character using polling, assume interrupts disabled */
  75. static char msim_do_read(chardev_t *dev)
  76. {
  77.     char ch;
  78.  
  79.     while (1) {
  80.         ch = *((volatile char *) MSIM_KBD_ADDRESS);
  81.         if (ch) {
  82.             if (ch == '\r')
  83.                 return '\n';
  84.             if (ch == 0x7f)
  85.                 return '\b';
  86.             return ch;
  87.         }
  88.     }
  89. }
  90.  
  91. /** Process keyboard interrupt. */
  92. static void msim_interrupt(int n, istate_t *istate)
  93. {
  94.     char ch = 0;
  95.  
  96.     ch = *((char *) MSIM_KBD_ADDRESS);
  97.     if (ch =='\r')
  98.         ch = '\n';
  99.     if (ch == 0x7f)
  100.         ch = '\b';
  101.     chardev_push_character(&console, ch);
  102. }
  103.  
  104.  
  105. /* Return console object representing msim console */
  106. void msim_console(void)
  107. {
  108.     chardev_initialize("msim_console", &console, &msim_ops);
  109.  
  110.     int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
  111.  
  112.     cp0_unmask_int(MSIM_KBD_IRQ);
  113.  
  114.     stdin = &console;
  115.     stdout = &console;
  116. }
  117.  
  118. static iroutine oldvector;
  119. void msim_kbd_grab(void)
  120. {
  121.     oldvector = int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
  122. }
  123. void msim_kbd_release(void)
  124. {
  125.     if (oldvector)
  126.         int_register(MSIM_KBD_IRQ, "user_interrupt", oldvector);
  127. }
  128.  
  129.  /** @}
  130.  */
  131.  
  132.