pexpert/ppc/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  *    PPC platform expert debugging output initialization.
  25  */
  26 #include <stdarg.h>
  27 #include <machine/machine_routines.h>
  28 #include <pexpert/protos.h>
  29 #include <pexpert/pexpert.h>
  30 #include <pexpert/ppc/powermac.h>
  31 #include <kern/debug.h>
  32 #include <kern/simple_lock.h>
  33
  34 /* extern references */
  35 extern void init_display_putc(unsigned char*, int, int);
  36 extern void display_putc(char c);
  37 extern int scc_putc(int unit, int line, int c);
  38 extern void cnputc(char c);
  39
  40 /* Internal routines -- eventually put this in serial driver */
  41 void serial_putc(char c);
  42
  43 /* Globals */
  44 void (*PE_kputc)(char c) = 0;
  45
  46 unsigned int disableSerialOuput = TRUE;
  47
  48 vm_offset_t     scc = 0;
  49
  50 struct slock kprintf_lock;
  51
  52 void PE_init_kprintf(boolean_t vm_initialized)
  53 {
  54         unsigned int    boot_arg;
  55
  56         if (PE_state.initialized == FALSE)
  57                 panic("Platform Expert not initialized");
  58
  59         if (PE_parse_boot_arg("debug", &boot_arg))
  60                 if(boot_arg & DB_KPRT) disableSerialOuput = FALSE;
  61
  62         if( (scc = PE_find_scc())) {                            /* See if we can find the serial port */
  63                 scc = io_map_spec(scc, 0x1000);                 /* Map it in */
  64                 initialize_serial((void *)scc);                 /* Start up the serial driver */
  65                 PE_kputc = serial_putc;
  66
  67                 simple_lock_init(&kprintf_lock, 0);
  68         } else
  69                         PE_kputc = cnputc;
  70
  71 #if 0
  72         /*
  73          * FUTURE: eventually let the boot command determine where
  74          *         the debug output will be, serial, video, etc.
  75          */
  76         switch (PE_state.debug_video.v_display) {
  77             case kDebugTypeSerial:
  78                     PE_kputc = serial_putc;
  79                     break;
  80
  81             case kDebugTypeDisplay:
  82                     init_display_putc(  (unsigned char*)PE_state.debug_video.v_baseAddr,
  83                                                         PE_state.debug_video.v_rowBytes,
  84                                                         PE_state.debug_video.v_height);
  85                     PE_kputc = display_putc;
  86                     break;
  87
  88             default:
  89                     PE_state.debug_video.v_baseAddr = 0;
  90         }
  91 #endif
  92 }
  93
  94 void serial_putc(char c)
  95 {
  96         (void) scc_putc(0, 1, c);
  97         if (c == '\n') (void) scc_putc(0, 1, '\r');
  98
  99 #if 0
 100         (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, c);
 101         if (c == '\n') (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, '\r');
 102 #endif
 103 }
 104
 105 void kprintf(const char *fmt, ...)
 106 {
 107         va_list   listp;
 108         boolean_t state;
 109
 110         state = ml_set_interrupts_enabled(FALSE);
 111         simple_lock(&kprintf_lock);
 112
 113         if (!disableSerialOuput) {
 114                 va_start(listp, fmt);
 115                 _doprnt(fmt, &listp, PE_kputc, 16);
 116                 va_end(listp);
 117         }
 118
 119         simple_unlock(&kprintf_lock);
 120         ml_set_interrupts_enabled(state);
 121 }
 122