/****************************************************************************
 * common/up_stackdump.c
 *
 *   Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY 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, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <debug.h>

#include "chip/chip.h"
#include "os_internal.h"
#include "up_internal.h"

/****************************************************************************
 * Definitions
 ****************************************************************************/

/* Output debug info if stack dump is selected -- even if 
 * debug is not selected.
 */

#ifdef CONFIG_ARCH_STACKDUMP
# undef  lldbg
# define lldbg lib_lowprintf
#endif

/****************************************************************************
 * Private Data
 ****************************************************************************/

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Name: up_getsp
 ****************************************************************************/
/* To be provided */

/****************************************************************************
 * Name: up_stackdump
 ****************************************************************************/

#ifdef CONFIG_ARCH_STACKDUMP
static void up_stackdump(void)
{
  _TCB *rtcb        = (_TCB*)g_readytorun.head;
  chipreg_t sp         = up_getsp();
  chipreg_t stack_base = (chipreg_t)rtcb->adj_stack_ptr;
  chipreg_t stack_size = (chipreg_t)rtcb->adj_stack_size;

  lldbg("stack_base: %08x\n", stack_base);
  lldbg("stack_size: %08x\n", stack_size);
  lldbg("sp:         %08x\n", sp);

  if (sp >= stack_base || sp < stack_base - stack_size)
    {
      lldbg("ERROR: Stack pointer is not within allocated stack\n");
      return;
    }
  else
    {
      chipreg_t stack = sp & ~0x0f;

      for (stack = sp & ~0x0f; stack < stack_base; stack += 8*sizeof(chipreg_t))
        {
          chipreg_t *ptr = (chipreg_t*)stack;
          lldbg("%08x: %08x %08x %08x %08x %08x %08x %08x %08x\n",
                 stack, ptr[0], ptr[1], ptr[2], ptr[3],
                 ptr[4], ptr[5], ptr[6], ptr[7]);
        }
    }
}
#endif
