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/***************************************************************************
* z16f/z16f_sysexec.c
*
* Copyright (C) 2008 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 <sys/types.h>
#include <debug.h>
#include <nuttx/arch.h>
#include "chip/chip.h"
#include "os_internal.h"
#include "up_internal.h"
/***************************************************************************
* Definitions
***************************************************************************/
#ifdef CONFIG_ARCH_LOWPUTC
# define SYSDBG lib_lowprintf
#else
# define SYSDBG lib_rawprintf
#endif
/***************************************************************************
* Private Types
***************************************************************************/
/***************************************************************************
* Private Functions
***************************************************************************/
/***************************************************************************
* Global Functions
***************************************************************************/
/***************************************************************************
* Function: z16f_sysexec
*
* Description:
* Handle a Z16F system execption
*
***************************************************************************/
void z16f_sysexec(FAR chipreg_t *regs)
{
int errcode = OSERR_ERREXCEPTION;
uint16 excp;
/* Save that register reference so that it can be used for built-in
* diagnostics.
*/
current_regs = regs;
/* The cause of the the system exception is indicated in the SYSEXCPH&L
* registers
*/
excp = getreg16(Z16F_SYSEXCP);
if ((excp & Z16F_SYSEXCP_SPOVF) != 0)
{
SYSDBG("SP OVERFLOW\n");
}
if ((excp & Z16F_SYSEXCP_PCOVF) != 0)
{
SYSDBG("PC OVERFLOW\n");
}
if ((excp & Z16F_SYSEXCP_DIV0) != 0)
{
SYSDBG("Divide by zero\n");
}
if ((excp & Z16F_SYSEXCP_DIVOVF) != 0)
{
SYSDBG("Divide overflow\n");
}
if ((excp & Z16F_SYSEXCP_ILL) != 0)
{
SYSDBG("Illegal instruction\n");
errcode = OSERR_UNDEFINEDINSN;
}
if ((excp & Z16F_SYSEXCP_WDTOSC) != 0)
{
SYSDBG("WDT oscillator failure\n");
}
if ((excp & Z16F_SYSEXCP_PRIOSC) != 0)
{
SYSDBG("Primary Oscillator Failure\n");
}
if ((excp & Z16F_SYSEXCP_WDT) != 0)
{
SYSDBG("Watchdog timeout\n");
z16f_reset();
}
PANIC(errcode);
}
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