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/* cfe.c -- I/O code for the MIPS boards running CFE.  */

/*

 * Copyright 2001, 2002, 2003

 * Broadcom Corporation. All rights reserved.

 *

 * This software is furnished under license and may be used and copied only

 * in accordance with the following terms and conditions.  Subject to these

 * conditions, you may download, copy, install, use, modify and distribute

 * modified or unmodified copies of this software in source and/or binary

 * form. No title or ownership is transferred hereby.

 *

 * 1) Any source code used, modified or distributed must reproduce and

 *    retain this copyright notice and list of conditions as they appear in

 *    the source file.

 *

 * 2) No right is granted to use any trade name, trademark, or logo of

 *    Broadcom Corporation.  The "Broadcom Corporation" name may not be

 *    used to endorse or promote products derived from this software

 *    without the prior written permission of Broadcom Corporation.

 *

 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED

 *    WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF

 *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR

 *    NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE

 *    FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE

 *    LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 *    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR

 *    BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 */

#include "cfe_api.h"

void *__libcfe_init (long handle, long a1, long cfe_entrypoint, long a3);

void __libcfe_exit (long status);

char inbyte (void);

int outbyte (char c);

/* Echo input characters?  */

int     __libcfe_echo_input = 0;

/* CFE handle used to access console device.  */

static int cfe_conshandle;

/* Initialize firmware callbacks.  Called from crt0_cfe.  Returns desired

   stack pointer.  */

void *

__libcfe_init (long handle, long a1, long entrypoint, long a3)

{

  cfe_init (handle, entrypoint);

  cfe_conshandle = cfe_getstdhandle (CFE_STDHANDLE_CONSOLE);

  __libcfe_meminit ();

  return __libcfe_stack_top ();

}

/* Exit back to monitor, with the given status code.  */

void

__libcfe_exit (long status)

{

  outbyte ('\r');

  outbyte ('\n');

  cfe_exit (CFE_FLG_WARMSTART, status);

}

char

inbyte (void)

{

  unsigned char c;

  int rv;

  while (cfe_read (cfe_conshandle, &c, 1) != 1)

    ;

  if (c == '\r')

    c = '\n';

  if (__libcfe_echo_input)

    outbyte (c);

  return c;

}

int

outbyte (char c)

{

  int res;

  do

    {

      res = cfe_write (cfe_conshandle, &c, 1);

    }

  while (res == 0);

  if (c == '\n')

    outbyte ('\r');

  return 0;

}

/* This is the MIPS cache flush function call.  No defines are provided

   by libgloss for 'cache', and CFE doesn't let you flush ranges, so

   we just flush all I & D for every call.  */

int

_flush_cache (char *addr, int nbytes, int cache)

{

  cfe_flushcache (0);

  return 0;

}