pexpert/ppc/pe_kprintf.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * file: pe_kprintf.c
  30  *    PPC platform expert debugging output initialization.
  31  */
  32 #include <stdarg.h>
  33 #include <machine/machine_routines.h>
  34 #include <pexpert/protos.h>
  35 #include <pexpert/pexpert.h>
  36 #include <pexpert/ppc/powermac.h>
  37 #include <pexpert/device_tree.h>
  38 #include <kern/debug.h>
  39 #include <kern/simple_lock.h>
  40 #include <vm/pmap.h>
  41
  42 /* extern references */
  43 extern void init_display_putc(unsigned char*, int, int);
  44 extern void display_putc(char c);
  45 extern int scc_putc(int unit, int line, int c);
  46 extern void cnputc(char c);
  47
  48 /* Internal routines -- eventually put this in serial driver */
  49 void serial_putc(char c);
  50
  51 /* Globals */
  52 void (*PE_kputc)(char c) = 0;
  53
  54 unsigned int disableSerialOuput = TRUE;
  55
  56 vm_offset_t     scc = 0;
  57
  58 struct slock kprintf_lock;
  59
  60 void PE_init_kprintf(boolean_t vm_initialized)
  61 {
  62         unsigned int    boot_arg;
  63         int32_t                 cnt, size, serial_baud = -1;
  64         DTEntry         options;
  65         char            *str, baud[7];
  66
  67         if (PE_state.initialized == FALSE)
  68                 panic("Platform Expert not initialized");
  69
  70         if (PE_parse_boot_arg("debug", &boot_arg))
  71                 if(boot_arg & DB_KPRT) disableSerialOuput = FALSE;
  72
  73         if (DTLookupEntry(0, "/options", &options) == kSuccess) {
  74           if (DTGetProperty(options, "input-device", &str, &size) == kSuccess) {
  75                 if ((size > 5) && !strncmp("scca:", str, 5)) {
  76                   size -= 5;
  77                   str += 5;
  78                   if (size <= 6) {
  79                         strncpy(baud, str, size);
  80                         baud[size] = '\0';
  81                         gPESerialBaud = strtol(baud, 0, 0);
  82                   }
  83                 }
  84           }
  85           if (DTGetProperty(options, "output-device", &str, &size) == kSuccess) {
  86                 if ((size > 5) && !strncmp("scca:", str, 5)) {
  87                   size -= 5;
  88                   str += 5;
  89                   if (size <= 6) {
  90                         strncpy(baud, str, size);
  91                         baud[size] = '\0';
  92                         gPESerialBaud = strtol(baud, 0, 0);
  93                   }
  94                 }
  95           }
  96         }
  97
  98         /* Check the boot-args for new serial baud. */
  99         if (PE_parse_boot_arg("serialbaud", &serial_baud))
 100                 if (serial_baud != -1) gPESerialBaud = serial_baud;
 101
 102         if( (scc = PE_find_scc())) {                            /* See if we can find the serial port */
 103                 scc = io_map_spec(scc, 0x1000, VM_WIMG_IO);     /* Map it in */
 104                 initialize_serial((void *)scc, gPESerialBaud); /* Start up the serial driver */
 105                 PE_kputc = serial_putc;
 106
 107                 simple_lock_init(&kprintf_lock, 0);
 108         } else
 109                         PE_kputc = cnputc;
 110
 111 #if 0
 112         /*
 113          * FUTURE: eventually let the boot command determine where
 114          *         the debug output will be, serial, video, etc.
 115          */
 116         switch (PE_state.debug_video.v_display) {
 117             case kDebugTypeSerial:
 118                     PE_kputc = serial_putc;
 119                     break;
 120
 121             case kDebugTypeDisplay:
 122                     init_display_putc(  (unsigned char*)PE_state.debug_video.v_baseAddr,
 123                                                         PE_state.debug_video.v_rowBytes,
 124                                                         PE_state.debug_video.v_height);
 125                     PE_kputc = display_putc;
 126                     break;
 127
 128             default:
 129                     PE_state.debug_video.v_baseAddr = 0;
 130         }
 131 #endif
 132 }
 133
 134 void serial_putc(char c)
 135 {
 136         (void) scc_putc(0, 1, c);
 137         if (c == '\n') (void) scc_putc(0, 1, '\r');
 138
 139 #if 0
 140         (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, c);
 141         if (c == '\n') (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, '\r');
 142 #endif
 143 }
 144
 145 void kprintf(const char *fmt, ...)
 146 {
 147         va_list   listp;
 148         boolean_t state;
 149
 150         state = ml_set_interrupts_enabled(FALSE);
 151         simple_lock(&kprintf_lock);
 152
 153         if (!disableSerialOuput) {
 154                 va_start(listp, fmt);
 155                 _doprnt(fmt, &listp, PE_kputc, 16);
 156                 va_end(listp);
 157         }
 158
 159         simple_unlock(&kprintf_lock);
 160         ml_set_interrupts_enabled(state);
 161 }
 162