src/console/printk.c

   1 /*
   2  *  blantantly copied from linux/kernel/printk.c
   3  *
   4  *  Copyright (C) 1991, 1992  Linus Torvalds
   5  *
   6  */
   7
   8 #include <smp/spinlock.h>
   9 #include <console/vtxprintf.h>
  10 #include <console/console.h>
  11 #include <trace.h>
  12
  13 int console_loglevel = CONFIG_DEFAULT_CONSOLE_LOGLEVEL;
  14 int default_console_loglevel = CONFIG_DEFAULT_CONSOLE_LOGLEVEL;
  15
  16 DECLARE_SPIN_LOCK(console_lock)
  17
  18 int do_printk(int msg_level, const char *fmt, ...)
  19 {
  20         va_list args;
  21         int i;
  22
  23         if (msg_level > console_loglevel) {
  24                 return 0;
  25         }
  26
  27         DISABLE_TRACE;
  28         spin_lock(&console_lock);
  29
  30         va_start(args, fmt);
  31         i = vtxprintf(console_tx_byte, fmt, args);
  32         va_end(args);
  33
  34         console_tx_flush();
  35
  36         spin_unlock(&console_lock);
  37         ENABLE_TRACE;
  38
  39         return i;
  40 }