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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 <putchar.h>
  30. #include <arch/types.h>
  31. #include <arch/cp0.h>
  32. #include <arch/console.h>
  33. #include <arch.h>
  34.  
  35. static void arc_putchar(const char ch)
  36. {
  37.     int cnt;
  38.     pri_t pri;
  39.  
  40.     /* TODO: Should be spinlock? */
  41.     pri = cpu_priority_high();
  42.     bios_write(1, &ch, 1, &cnt);
  43.     cpu_priority_restore(pri);
  44.    
  45. }
  46.  
  47. static void cons_putchar(const char ch)
  48. {
  49.     *((char *) VIDEORAM) = ch;
  50. }
  51.  
  52.  
  53. static void serial_putchar(const char ch)
  54. {
  55.     int i;
  56.  
  57.     if (ch=='\n')
  58.         putchar('\r');
  59.  
  60.     /* Wait until transmit buffer empty */
  61.     while (! ((*SERIAL_LSR) & (1<<TRANSMIT_EMPTY_BIT)))
  62.         ;
  63.     *(SERIAL_PORT_BASE) = ch;
  64. }
  65.  
  66. static void (*putchar_func)(const char ch) = cons_putchar;
  67.  
  68. void console_init(void)
  69. {
  70.     /* The LSR on the start usually contains this value */
  71.     if (*SERIAL_LSR == 0x60)
  72.         putchar_func = serial_putchar;
  73.     else
  74.         putchar_func = cons_putchar;
  75. }
  76.  
  77. void putchar(const char ch)
  78. {
  79.     putchar_func(ch);
  80. }
  81.