pexpert/i386/pe_kprintf.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * file: pe_kprintf.c
  24  *    i386 platform expert debugging output initialization.
  25  */
  26 #include <stdarg.h>
  27 #include <pexpert/pexpert.h>
  28 #include <kern/debug.h>
  29
  30 /* extern references */
  31 extern void cnputc(char c);
  32
  33 /* Globals */
  34 void (*PE_kputc)(char c) = 0;
  35
  36 unsigned int disableSerialOuput = TRUE;
  37
  38 void PE_init_kprintf(boolean_t vm_initialized)
  39 {
  40         unsigned int    boot_arg;
  41
  42         if (PE_state.initialized == FALSE)
  43                 panic("Platform Expert not initialized");
  44
  45         if (!vm_initialized)
  46         {
  47             if (PE_parse_boot_arg("debug", &boot_arg))
  48                 if (boot_arg & DB_KPRT) disableSerialOuput = FALSE;
  49
  50         /* FIXME - route output to serial port. */
  51         PE_kputc = cnputc;
  52     }
  53 }
  54
  55 void kprintf(const char *fmt, ...)
  56 {
  57         va_list listp;
  58
  59     if (!disableSerialOuput) {
  60         va_start(listp, fmt);
  61         _doprnt(fmt, &listp, PE_kputc, 16);
  62         va_end(listp);
  63     }
  64 }