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root/bsp/hal/arm/integrator/diag.c

DEFINITIONS

1. serial_putc
2. diag_puts
3. diag_init

   1 /*-
   2  * Copyright (c) 2008, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 /*
  31  * diag.c - diagnostic message support
  32  */
  34 #include <sys/bootinfo.h>
  35 #include <kernel.h>
  36 #include <cpufunc.h>
  38 #include "platform.h"
  40 #define UART_FR         (*(volatile uint32_t *)(UART_BASE + 0x18))
  41 #define UART_DR         (*(volatile uint32_t *)(UART_BASE + 0x00))
  43 /* Flag register */
  44 #define FR_RXFE         0x10    /* Receive FIFO empty */
  45 #define FR_TXFF         0x20    /* Transmit FIFO full */
  47 static void
serial_putc(char c)
  49 {
  51         while (UART_FR & FR_TXFF)
  52                 ;
UART_DR = (uint32_t)c;
  54 }
  56 void
diag_puts(char *buf)
  58 {
  60         while (*buf) {
  61                 if (*buf == '\n')
serial_putc('\r');
serial_putc(*buf++);
  64         }
  65 }
  67 void
diag_init(void)
  69 {
  71 #ifdef CONFIG_MMU
mmu_premap(0x16000000, UART_BASE);
  73 #endif
  74 }