LXR darwin-xnu/pexpert/ppc/pe

   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 <pexpert/device_tree.h>
  32#include <kern/debug.h>
  33#include <kern/simple_lock.h>
  34
  35/* extern references */
  36extern void init_display_putc(unsigned char*, int, int);
  37extern void display_putc(char c);
  38extern int scc_putc(int unit, int line, int c);
  39extern void cnputc(char c);
  40
  41/* Internal routines -- eventually put this in serial driver */
  42void serial_putc(char c);
  43
  44/* Globals */
  45void (*PE_kputc)(char c) = 0;
  46
  47unsigned int disableSerialOuput = TRUE;
  48
  49vm_offset_t     scc = 0;
  50
  51struct slock kprintf_lock;
  52
  53void PE_init_kprintf(boolean_t vm_initialized)
  54{
  55        unsigned int    boot_arg;
  56        int32_t                 cnt, size, serial_baud = -1;
  57        DTEntry         options;
  58        char            *str, baud[7];
  59
  60        if (PE_state.initialized == FALSE)
  61                panic("Platform Expert not initialized");
  62
  63        if (PE_parse_boot_arg("debug", &boot_arg))
  64                if(boot_arg & DB_KPRT) disableSerialOuput = FALSE; 
  65
  66        if (DTLookupEntry(0, "/options", &options) == kSuccess) {
  67          if (DTGetProperty(options, "input-device", &str, &size) == kSuccess) {
  68                if ((size > 5) && !strncmp("scca:", str, 5)) {
  69                  size -= 5;
  70                  str += 5;
  71                  if (size <= 6) {
  72                        strncpy(baud, str, size);
  73                        baud[size] = '\0';
  74                        gPESerialBaud = strtol(baud, 0, 0);
  75                  }
  76                }
  77          }
  78          if (DTGetProperty(options, "output-device", &str, &size) == kSuccess) {
  79                if ((size > 5) && !strncmp("scca:", str, 5)) {
  80                  size -= 5;
  81                  str += 5;
  82                  if (size <= 6) {
  83                        strncpy(baud, str, size);
  84                        baud[size] = '\0';
  85                        gPESerialBaud = strtol(baud, 0, 0);
  86                  }
  87                }
  88          }       
  89        }
  90
  91        /* Check the boot-args for new serial baud. */
  92        if (PE_parse_boot_arg("serialbaud", &serial_baud))
  93                if (serial_baud != -1) gPESerialBaud = serial_baud; 
  94
  95        if( (scc = PE_find_scc())) {                            /* See if we can find the serial port */
  96                scc = io_map_spec(scc, 0x1000);                          /* Map it in */
  97                initialize_serial((void *)scc, gPESerialBaud); /* Start up the serial driver */
  98                PE_kputc = serial_putc;
  99
 100                simple_lock_init(&kprintf_lock, 0);
 101        } else
 102                        PE_kputc = cnputc;
 103
 104#if 0
 105        /*
 106         * FUTURE: eventually let the boot command determine where
 107         *         the debug output will be, serial, video, etc.
 108         */
 109        switch (PE_state.debug_video.v_display) {
 110            case kDebugTypeSerial:
 111                    PE_kputc = serial_putc;
 112                    break;
 113
 114            case kDebugTypeDisplay:
 115                    init_display_putc(  (unsigned char*)PE_state.debug_video.v_baseAddr,
 116                                                        PE_state.debug_video.v_rowBytes,
 117                                                        PE_state.debug_video.v_height);
 118                    PE_kputc = display_putc;
 119                    break;
 120
 121            default:
 122                    PE_state.debug_video.v_baseAddr = 0;
 123        }
 124#endif
 125}
 126
 127void serial_putc(char c)
 128{
 129        (void) scc_putc(0, 1, c);
 130        if (c == '\n') (void) scc_putc(0, 1, '\r');
 131
 132#if 0
 133        (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, c);
 134        if (c == '\n') (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, '\r');
 135#endif
 136}
 137
 138void kprintf(const char *fmt, ...)
 139{
 140        va_list   listp;
 141        boolean_t state;
 142        
 143        state = ml_set_interrupts_enabled(FALSE);
 144        simple_lock(&kprintf_lock);
 145        
 146        if (!disableSerialOuput) {      
 147                va_start(listp, fmt);
 148                _doprnt(fmt, &listp, PE_kputc, 16);
 149                va_end(listp);
 150        }
 151        
 152        simple_unlock(&kprintf_lock);
 153        ml_set_interrupts_enabled(state);
 154}
 155
 156