pexpert/ppc/pe_kprintf.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * file: pe_kprintf.c
  27  *    PPC platform expert debugging output initialization.
  28  */
  29 #include <stdarg.h>
  30 #include <machine/machine_routines.h>
  31 #include <pexpert/protos.h>
  32 #include <pexpert/pexpert.h>
  33 #include <pexpert/ppc/powermac.h>
  34 #include <kern/debug.h>
  35 #include <kern/simple_lock.h>
  36
  37 /* extern references */
  38 extern void init_display_putc(unsigned char*, int, int);
  39 extern void display_putc(char c);
  40 extern int scc_putc(int unit, int line, int c);
  41 extern void cnputc(char c);
  42
  43 /* Internal routines -- eventually put this in serial driver */
  44 void serial_putc(char c);
  45
  46 /* Globals */
  47 void (*PE_kputc)(char c) = 0;
  48
  49 unsigned int disableSerialOuput = TRUE;
  50
  51 vm_offset_t     scc = 0;
  52
  53 struct slock kprintf_lock;
  54
  55 void PE_init_kprintf(boolean_t vm_initialized)
  56 {
  57         unsigned int    boot_arg;
  58
  59         if (PE_state.initialized == FALSE)
  60                 panic("Platform Expert not initialized");
  61
  62         if (PE_parse_boot_arg("debug", &boot_arg))
  63                 if(boot_arg & DB_KPRT) disableSerialOuput = FALSE;
  64
  65         if( (scc = PE_find_scc())) {                            /* See if we can find the serial port */
  66                 scc = io_map_spec(scc, 0x1000);                 /* Map it in */
  67                 initialize_serial((void *)scc);                 /* Start up the serial driver */
  68                 PE_kputc = serial_putc;
  69
  70                 simple_lock_init(&kprintf_lock, 0);
  71         } else
  72                         PE_kputc = cnputc;
  73
  74 #if 0
  75         /*
  76          * FUTURE: eventually let the boot command determine where
  77          *         the debug output will be, serial, video, etc.
  78          */
  79         switch (PE_state.debug_video.v_display) {
  80             case kDebugTypeSerial:
  81                     PE_kputc = serial_putc;
  82                     break;
  83
  84             case kDebugTypeDisplay:
  85                     init_display_putc(  (unsigned char*)PE_state.debug_video.v_baseAddr,
  86                                                         PE_state.debug_video.v_rowBytes,
  87                                                         PE_state.debug_video.v_height);
  88                     PE_kputc = display_putc;
  89                     break;
  90
  91             default:
  92                     PE_state.debug_video.v_baseAddr = 0;
  93         }
  94 #endif
  95 }
  96
  97 void serial_putc(char c)
  98 {
  99         (void) scc_putc(0, 1, c);
 100         if (c == '\n') (void) scc_putc(0, 1, '\r');
 101
 102 #if 0
 103         (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, c);
 104         if (c == '\n') (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, '\r');
 105 #endif
 106 }
 107
 108 void kprintf(const char *fmt, ...)
 109 {
 110         va_list   listp;
 111         boolean_t state;
 112
 113         state = ml_set_interrupts_enabled(FALSE);
 114         simple_lock(&kprintf_lock);
 115
 116         if (!disableSerialOuput) {
 117                 va_start(listp, fmt);
 118                 _doprnt(fmt, &listp, PE_kputc, 16);
 119                 va_end(listp);
 120         }
 121
 122         simple_unlock(&kprintf_lock);
 123         ml_set_interrupts_enabled(state);
 124 }
 125