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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. #include <console/console.h>
  31. #include <console/chardev.h>
  32. #include <arch/interrupt.h>
  33. #include <sysinfo/sysinfo.h>
  34.  
  35. chardev_t ski_console;
  36. chardev_t ski_uconsole;
  37. static bool kb_disable;
  38. int kbd_uspace=0;
  39.  
  40. static void ski_putchar(chardev_t *d, const char ch);
  41. static __s32 ski_getchar(void);
  42.  
  43. /** Display character on debug console
  44.  *
  45.  * Use SSC (Simulator System Call) to
  46.  * display character on debug console.
  47.  *
  48.  * @param d Character device.
  49.  * @param ch Character to be printed.
  50.  */
  51. void ski_putchar(chardev_t *d, const char ch)
  52. {
  53.     __asm__ volatile (
  54.         "mov r15=%0\n"
  55.         "mov r32=%1\n"      /* r32 is in0 */
  56.         "break 0x80000\n"   /* modifies r8 */
  57.         :
  58.         : "i" (SKI_PUTCHAR), "r" (ch)
  59.         : "r15", "in0", "r8"
  60.     );
  61.    
  62.     if (ch == '\n')
  63.         ski_putchar(d, '\r');
  64. }
  65.  
  66. /** Ask debug console if a key was pressed.
  67.  *
  68.  * Use SSC (Simulator System Call) to
  69.  * get character from debug console.
  70.  *
  71.  * This call is non-blocking.
  72.  *
  73.  * @return ASCII code of pressed key or 0 if no key pressed.
  74.  */
  75. __s32 ski_getchar(void)
  76. {
  77.     __u64 ch;
  78.    
  79.     __asm__ volatile (
  80.         "mov r15=%1\n"
  81.         "break 0x80000;;\n" /* modifies r8 */
  82.         "mov %0=r8;;\n"    
  83.  
  84.         : "=r" (ch)
  85.         : "i" (SKI_GETCHAR)
  86.         : "r15",  "r8"
  87.     );
  88.  
  89.     return (__s32) ch;
  90. }
  91.  
  92. /**
  93.  * This is a blocking wrapper for ski_getchar().
  94.  * To be used when the kernel crashes.
  95.  */
  96. static char ski_getchar_blocking(chardev_t *d)
  97. {
  98.     int ch;
  99.  
  100.     while(!(ch=ski_getchar()))
  101.         ;
  102.     if(ch == '\r')
  103.         ch = '\n';
  104.     return (char) ch;
  105. }
  106.  
  107. /** Ask keyboard if a key was pressed. */
  108. void poll_keyboard(void)
  109. {
  110.     char ch;
  111.     static char last;
  112.  
  113.     if (kb_disable)
  114.         return;
  115.  
  116.     ch = ski_getchar();
  117.     if(ch == '\r')
  118.         ch = '\n';
  119.     if (ch){
  120.         if(kbd_uspace){
  121.             chardev_push_character(&ski_uconsole, ch);
  122.             virtual_interrupt(IRQ_KBD,NULL);
  123.         }
  124.         else {
  125.             chardev_push_character(&ski_console, ch);
  126.         }  
  127.         last = ch;     
  128.         return;
  129.     }  
  130.  
  131.     if (last){
  132.         if(kbd_uspace){
  133.             chardev_push_character(&ski_uconsole, 0);
  134.             virtual_interrupt(IRQ_KBD,NULL);
  135.         }
  136.         else {
  137.         }  
  138.         last = 0;      
  139.     }  
  140.  
  141. }
  142.  
  143. /* Called from getc(). */
  144. static void ski_kb_enable(chardev_t *d)
  145. {
  146.     kb_disable = false;
  147. }
  148.  
  149. /* Called from getc(). */
  150. static void ski_kb_disable(chardev_t *d)
  151. {
  152.     kb_disable = true; 
  153. }
  154.  
  155.  
  156. static chardev_operations_t ski_ops = {
  157.     .resume = ski_kb_enable,
  158.     .suspend = ski_kb_disable,
  159.     .write = ski_putchar,
  160.     .read = ski_getchar_blocking
  161. };
  162.  
  163.  
  164. /** Initialize debug console
  165.  *
  166.  * Issue SSC (Simulator System Call) to
  167.  * to open debug console.
  168.  */
  169. void ski_init_console(void)
  170. {
  171.     __asm__ volatile (
  172.         "mov r15=%0\n"
  173.         "break 0x80000\n"
  174.         :
  175.         : "i" (SKI_INIT_CONSOLE)
  176.         : "r15", "r8"
  177.     );
  178.  
  179.     chardev_initialize("ski_console", &ski_console, &ski_ops);
  180.     chardev_initialize("ski_uconsole", &ski_uconsole, &ski_ops);
  181.     stdin = &ski_console;
  182.     stdout = &ski_console;
  183.  
  184. }
  185. /** Setup console sysinfo (i.e. Keyboard IRQ)
  186.  *
  187.  * Because sysinfo neads memory allocation/dealocation
  188.  * this functions should be called separetely from init.
  189.  *
  190.  */
  191. void ski_set_console_sysinfo(void)
  192. {
  193.     sysinfo_set_item_val("kbd",NULL,true);
  194.     sysinfo_set_item_val("kbd.irq",NULL,IRQ_KBD);
  195. }
  196.