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
  41 /* extern references */
  42 extern void init_display_putc(unsigned char*, int, int);
  43 extern void display_putc(char c);
  44 extern int scc_putc(int unit, int line, int c);
  45 extern void cnputc(char c);
  46
  47 /* Internal routines -- eventually put this in serial driver */
  48 void serial_putc(char c);
  49
  50 /* Globals */
  51 void (*PE_kputc)(char c) = 0;
  52
  53 unsigned int disableSerialOuput = TRUE;
  54
  55 vm_offset_t     scc = 0;
  56
  57 struct slock kprintf_lock;
  58
  59 void PE_init_kprintf(boolean_t vm_initialized)
  60 {
  61         unsigned int    boot_arg;
  62         int32_t                 cnt, size, serial_baud = -1;
  63         DTEntry         options;
  64         char            *str, baud[7];
  65
  66         if (PE_state.initialized == FALSE)
  67                 panic("Platform Expert not initialized");
  68
  69         if (PE_parse_boot_arg("debug", &boot_arg))
  70                 if(boot_arg & DB_KPRT) disableSerialOuput = FALSE;
  71
  72         if (DTLookupEntry(0, "/options", &options) == kSuccess) {
  73           if (DTGetProperty(options, "input-device", &str, &size) == kSuccess) {
  74                 if ((size > 5) && !strncmp("scca:", str, 5)) {
  75                   size -= 5;
  76                   str += 5;
  77                   if (size <= 6) {
  78                         strncpy(baud, str, size);
  79                         baud[size] = '\0';
  80                         gPESerialBaud = strtol(baud, 0, 0);
  81                   }
  82                 }
  83           }
  84           if (DTGetProperty(options, "output-device", &str, &size) == kSuccess) {
  85                 if ((size > 5) && !strncmp("scca:", str, 5)) {
  86                   size -= 5;
  87                   str += 5;
  88                   if (size <= 6) {
  89                         strncpy(baud, str, size);
  90                         baud[size] = '\0';
  91                         gPESerialBaud = strtol(baud, 0, 0);
  92                   }
  93                 }
  94           }
  95         }
  96
  97         /* Check the boot-args for new serial baud. */
  98         if (PE_parse_boot_arg("serialbaud", &serial_baud))
  99                 if (serial_baud != -1) gPESerialBaud = serial_baud;
 100
 101         if( (scc = PE_find_scc())) {                            /* See if we can find the serial port */
 102                 scc = io_map_spec(scc, 0x1000);                          /* Map it in */
 103                 initialize_serial((void *)scc, gPESerialBaud); /* Start up the serial driver */
 104                 PE_kputc = serial_putc;
 105
 106                 simple_lock_init(&kprintf_lock, 0);
 107         } else
 108                         PE_kputc = cnputc;
 109
 110 #if 0
 111         /*
 112          * FUTURE: eventually let the boot command determine where
 113          *         the debug output will be, serial, video, etc.
 114          */
 115         switch (PE_state.debug_video.v_display) {
 116             case kDebugTypeSerial:
 117                     PE_kputc = serial_putc;
 118                     break;
 119
 120             case kDebugTypeDisplay:
 121                     init_display_putc(  (unsigned char*)PE_state.debug_video.v_baseAddr,
 122                                                         PE_state.debug_video.v_rowBytes,
 123                                                         PE_state.debug_video.v_height);
 124                     PE_kputc = display_putc;
 125                     break;
 126
 127             default:
 128                     PE_state.debug_video.v_baseAddr = 0;
 129         }
 130 #endif
 131 }
 132
 133 void serial_putc(char c)
 134 {
 135         (void) scc_putc(0, 1, c);
 136         if (c == '\n') (void) scc_putc(0, 1, '\r');
 137
 138 #if 0
 139         (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, c);
 140         if (c == '\n') (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, '\r');
 141 #endif
 142 }
 143
 144 void kprintf(const char *fmt, ...)
 145 {
 146         va_list   listp;
 147         boolean_t state;
 148
 149         state = ml_set_interrupts_enabled(FALSE);
 150         simple_lock(&kprintf_lock);
 151
 152         if (!disableSerialOuput) {
 153                 va_start(listp, fmt);
 154                 _doprnt(fmt, &listp, PE_kputc, 16);
 155                 va_end(listp);
 156         }
 157
 158         simple_unlock(&kprintf_lock);
 159         ml_set_interrupts_enabled(state);
 160 }
 161