src/console/console.c

   1 /*
   2  * Bootstrap code for the INTEL
   3  */
   4
   5 #include <arch/io.h>
   6 #include <console/console.h>
   7 #include <string.h>
   8 #include <pc80/mc146818rtc.h>
   9
  10
  11 static int initialized;
  12
  13 /* initialize the console */
  14 void console_init(void)
  15 {
  16         struct console_driver *driver;
  17         if(get_option(&console_loglevel, "debug_level"))
  18                 console_loglevel=DEFAULT_CONSOLE_LOGLEVEL;
  19
  20         for(driver = console_drivers; driver < econsole_drivers; driver++) {
  21                 if (!driver->init)
  22                         continue;
  23                 driver->init();
  24         }
  25         initialized = 1;
  26 }
  27
  28 static void __console_tx_byte(unsigned char byte)
  29 {
  30         struct console_driver *driver;
  31         for(driver = console_drivers; driver < econsole_drivers; driver++) {
  32                 driver->tx_byte(byte);
  33         }
  34 }
  35
  36 void console_tx_flush(void)
  37 {
  38         struct console_driver *driver;
  39         for(driver = console_drivers; driver < econsole_drivers; driver++) {
  40                 if (!driver->tx_flush)
  41                         continue;
  42                 driver->tx_flush();
  43         }
  44 }
  45
  46 void console_tx_byte(unsigned char byte)
  47 {
  48         if (!initialized)
  49                 return;
  50         if (byte == '\n')
  51                 __console_tx_byte('\r');
  52         __console_tx_byte(byte);
  53 }
  54
  55 unsigned char console_rx_byte(void)
  56 {
  57         struct console_driver *driver;
  58         if (!initialized)
  59                 return 0;
  60         for(driver = console_drivers; driver < econsole_drivers; driver++) {
  61                 if (driver->tst_byte)
  62                         break;
  63         }
  64         if (driver == econsole_drivers)
  65                 return 0;
  66         while (!driver->tst_byte());
  67         return driver->rx_byte();
  68 }
  69
  70 int console_tst_byte(void)
  71 {
  72         struct console_driver *driver;
  73         if (!initialized)
  74                 return 0;
  75         for(driver = console_drivers; driver < econsole_drivers; driver++)
  76                 if (driver->tst_byte)
  77                         return driver->tst_byte();
  78         return 0;
  79 }
  80
  81 /*
  82  *    Write POST information
  83  */
  84 void post_code(uint8_t value)
  85 {
  86 #if NO_POST==0
  87 #if CONFIG_SERIAL_POST==1
  88         printk_emerg("POST: 0x%02x\n", value);
  89 #endif
  90         outb(value, 0x80);
  91 #endif
  92 }
  93
  94 /* Report a fatal error */
  95 void die(const char *msg)
  96 {
  97         printk_emerg("%s", msg);
  98         post_code(0xff);
  99         while (1);              /* Halt */
 100 }