LXR linux/arch/mn10300/kernel/mn10300-debug.c

   1/* Debugging stuff for the MN10300-based processors
   2 *
   3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public Licence
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the Licence, or (at your option) any later version.
  10 */
  11#include <linux/sched.h>
  12#include <asm/serial-regs.h>
  13
  14#undef MN10300_CONSOLE_ON_SERIO
  15
  16/*
  17 * write a string directly through one of the serial ports on-board the MN10300
  18 */
  19#ifdef MN10300_CONSOLE_ON_SERIO
  20void debug_to_serial_mnser(const char *p, int n)
  21{
  22        char ch;
  23
  24        for (; n > 0; n--) {
  25                ch = *p++;
  26
  27#if MN10300_CONSOLE_ON_SERIO == 0
  28                while (SC0STR & (SC01STR_TBF)) continue;
  29                SC0TXB = ch;
  30                while (SC0STR & (SC01STR_TBF)) continue;
  31                if (ch == 0x0a) {
  32                        SC0TXB = 0x0d;
  33                        while (SC0STR & (SC01STR_TBF)) continue;
  34                }
  35
  36#elif MN10300_CONSOLE_ON_SERIO == 1
  37                while (SC1STR & (SC01STR_TBF)) continue;
  38                SC1TXB = ch;
  39                while (SC1STR & (SC01STR_TBF)) continue;
  40                if (ch == 0x0a) {
  41                        SC1TXB = 0x0d;
  42                        while (SC1STR & (SC01STR_TBF)) continue;
  43                }
  44
  45#elif MN10300_CONSOLE_ON_SERIO == 2
  46                while (SC2STR & (SC2STR_TBF)) continue;
  47                SC2TXB = ch;
  48                while (SC2STR & (SC2STR_TBF)) continue;
  49                if (ch == 0x0a) {
  50                        SC2TXB = 0x0d;
  51                        while (SC2STR & (SC2STR_TBF)) continue;
  52                }
  53
  54#endif
  55        }
  56}
  57#endif
  58
  59