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contiki/platform/jn516x/dev/exceptions.c

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/*
* Copyright (c) 2015 NXP B.V.
* All rights reserved.
*
* 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 of NXP B.V. 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 NXP B.V. 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 NXP B.V. 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.
*
* This file is part of the Contiki operating system.
*
* Author: Thomas Haydon
* Integrated into Contiki by Beshr Al Nahas
*
*/
#include <jendefs.h>
#include <AppHardwareApi.h>
#include <MicroInt.h>
#include "exceptions.h"
#ifndef EXCEPTION_STALLS_SYSTEM
#define EXCEPTION_STALLS_SYSTEM 0
#endif /* EXCEPTION_STALLS_SYSTEM */
#ifndef PRINT_STACK_ON_REBOOT
#define PRINT_STACK_ON_REBOOT 1
#endif /* PRINT_STACK_ON_REBOOT */
/** Define to dump the stack on exception */
#ifndef EXC_DUMP_STACK
#define EXC_DUMP_STACK
#endif /* EXC_DUMP_STACK */
/** Define to dump registers on exception */
#ifndef EXC_DUMP_REGS
/* #define EXC_DUMP_REGS */
#endif /* EXC_DUMP_REGS */
/* Select whether exception vectors should be in RAM or Flash based on chip family */
#if (defined JENNIC_CHIP_FAMILY_JN514x)
#define EXCEPTION_VECTORS_LOCATION_RAM
#elif (defined JENNIC_CHIP_FAMILY_JN516x)
#define EXCEPTION_VECTORS_LOCATION_FLASH
#else
#error Unsupported chip family selected
#endif /* JENNIC_CHIP_FAMILY */
#if (defined EXCEPTION_VECTORS_LOCATION_RAM)
/* RAM exception vectors are set up at run time */
/* Addresses of exception vectors in RAM */
#define BUS_ERROR *((volatile uint32 *)(0x4000000))
#define TICK_TIMER *((volatile uint32 *)(0x4000004))
#define UNALIGNED_ACCESS *((volatile uint32 *)(0x4000008))
#define ILLEGAL_INSTRUCTION *((volatile uint32 *)(0x400000c))
#define EXTERNAL_INTERRUPT *((volatile uint32 *)(0x4000010))
#define SYSCALL *((volatile uint32 *)(0x4000014))
#define TRAP *((volatile uint32 *)(0x4000018))
#define GENERIC *((volatile uint32 *)(0x400001c))
#define STACK_OVERFLOW *((volatile uint32 *)(0x4000020))
#elif (defined EXCEPTION_VECTORS_LOCATION_FLASH)
/* Flash exception vectors are set up at compile time */
#else
#error Unknown exception vector location
#endif /* EXCEPTION_VECTORS_LOCATION */
/* Locations in stack trace of important information */
#define STACK_REG 1
#define PROGRAM_COUNTER 18
#define EFFECTIVE_ADDR 19
/* Number of registers */
#define REG_COUNT 16
/* Chip dependant RAM size */
#if defined(JENNIC_CHIP_JN5148) || defined(JENNIC_CHIP_JN5148J01)
#define EXCEPTION_RAM_TOP 0x04020000
#else
#define EXCEPTION_RAM_TOP 0x04008000
#endif
static void exception_handler(uint32 *pu32Stack, eExceptionType eType);
static void *heap_alloc_overflow_protect(void *pvPointer, uint32 u32Size, bool_t bClear);
/*---------------------------------------------------------------------------*/
#if PRINT_STACK_ON_REBOOT
static void hexprint(uint8 v);
static void hexprint32(uint32 v);
static void printstring(const char *s);
#endif /* PRINT_STACK_ON_REBOOT */
/* For debugging */
static const char *debug_filename = "nothing";
static int debug_line = -1;
void
debug_file_line(const char *file, int line)
{
debug_filename = file;
debug_line = line;
}
extern uint32 heap_location;
extern void *(*prHeap_AllocFunc)(void *, uint32, bool_t);
PRIVATE void *(*prHeap_AllocOrig)(void *, uint32, bool_t);
/* Symbol defined by the linker script */
/* marks the end of the stack */
extern void *stack_low_water_mark;
/****************************************************************************/
/*** Local Functions ***/
/****************************************************************************/
/*---------------------------------------------------------------------------*/
#if PRINT_STACK_ON_REBOOT
#include "dev/uart0.h"
#define printchar(X) uart0_write_direct(X)
/*---------------------------------------------------------------------------*/
static void
hexprint(uint8 v)
{
const char hexconv[] = "0123456789abcdef";
printchar(hexconv[v >> 4]);
printchar(hexconv[v & 0x0f]);
}
/*---------------------------------------------------------------------------*/
static void
hexprint32(uint32 v)
{
hexprint(((uint32)v) >> (uint32)24);
hexprint(((uint32)v) >> (uint32)16);
hexprint(((uint32)v) >> (uint32)8);
hexprint((v) & 0xff);
}
/*---------------------------------------------------------------------------*/
static void
printstring(const char *s)
{
while(*s) {
printchar(*s++);
}
}
#endif /* PRINT_STACK_ON_REBOOT */
/****************************************************************************
*
* NAME: vEXC_Register
*
* DESCRIPTION:
* Set up exceptions. When in RAM, overwrite the default vectors with ours.
* We also patch the heap allocation function so that we can keep tabs on
* the amount of free heap.
*
* PARAMETERS: None
*
* RETURNS:
* None
*
****************************************************************************/
PUBLIC void
vEXC_Register(void)
{
#ifdef EXCEPTION_VECTORS_LOCATION_RAM
/* Overwrite exception vectors, pointing them all at the generic handler */
BUS_ERROR = (uint32)exception_handler;
UNALIGNED_ACCESS = (uint32)exception_handler;
ILLEGAL_INSTRUCTION = (uint32)exception_handler;
SYSCALL = (uint32)exception_handler;
TRAP = (uint32)exception_handler;
GENERIC = (uint32)exception_handler;
STACK_OVERFLOW = (uint32)exception_handler;
#endif /* EXCEPTION_VECTORS_LOCATION */
prHeap_AllocOrig = prHeap_AllocFunc;
prHeap_AllocFunc = heap_alloc_overflow_protect;
}
#ifdef EXCEPTION_VECTORS_LOCATION_FLASH
/* If exception vectors are in flash, define the handler functions here to be linked in */
/* These function names are defined in the 6x linker script for the various exceptions */
/* Point them all at the generic handler */
PUBLIC void
vException_BusError(uint32 *pu32Stack, eExceptionType eType)
{
exception_handler(pu32Stack, eType);
}
PUBLIC void
vException_UnalignedAccess(uint32 *pu32Stack, eExceptionType eType)
{
exception_handler(pu32Stack, eType);
}
PUBLIC void
vException_IllegalInstruction(uint32 *pu32Stack, eExceptionType eType)
{
exception_handler(pu32Stack, eType);
}
PUBLIC void
vException_SysCall(uint32 *pu32Stack, eExceptionType eType)
{
exception_handler(pu32Stack, eType);
}
PUBLIC void
vException_Trap(uint32 *pu32Stack, eExceptionType eType)
{
exception_handler(pu32Stack, eType);
}
PUBLIC void
vException_StackOverflow(uint32 *pu32Stack, eExceptionType eType)
{
exception_handler(pu32Stack, eType);
}
#endif /* EXCEPTION_VECTORS_LOCATION_FLASH */
/****************************************************************************
*
* NAME: exception_handler
*
* DESCRIPTION:
* Generic exception handler which is called whether the vectors are in RAM or flash
*
* PARAMETERS: None
*
* RETURNS:
* None
*
****************************************************************************/
static void
exception_handler(uint32 *pu32Stack, eExceptionType eType)
{
#if (defined EXC_DUMP_STACK) || (defined EXC_DUMP_REGS)
int i;
#endif
uint32 u32EPCR, u32EEAR, u32Stack;
char *pcString;
MICRO_DISABLE_INTERRUPTS();
switch(eType) {
case E_EXC_BUS_ERROR:
pcString = "BUS";
break;
case E_EXC_UNALIGNED_ACCESS:
pcString = "ALIGN";
break;
case E_EXC_ILLEGAL_INSTRUCTION:
pcString = "ILLEGAL";
break;
case E_EXC_SYSCALL:
pcString = "SYSCALL";
break;
case E_EXC_TRAP:
pcString = "TRAP";
break;
case E_EXC_GENERIC:
pcString = "GENERIC";
break;
case E_EXC_STACK_OVERFLOW:
pcString = "STACK";
break;
default:
pcString = "UNKNOWN";
break;
}
if(bAHI_WatchdogResetEvent()) {
pcString = "WATCHDOG";
}
vAHI_WatchdogStop();
/* Pull the EPCR and EEAR values from where they've been saved by the ROM exception handler */
u32EPCR = pu32Stack[PROGRAM_COUNTER];
u32EEAR = pu32Stack[EFFECTIVE_ADDR];
u32Stack = pu32Stack[STACK_REG];
/* Log the exception */
printstring("\n\n\n");
printstring(pcString);
printstring(" EXCEPTION @ $");
hexprint32(u32EPCR);
printstring(" EA: ");
hexprint32(u32EEAR);
printstring(" SK: ");
hexprint32(u32Stack);
printstring(" HP: ");
hexprint32(((uint32 *)&heap_location)[0]);
printstring("\n");
printstring(" File: ");
printstring(debug_filename);
printstring(" Line: ");
hexprint32(debug_line);
printstring("\n");
#ifdef EXC_DUMP_REGS
printstring("\nREGS: ");
/* Pull and print the registers from saved locations */
for(i = 0; i < REG_COUNT; i += 4) {
printstring("R");
hexprint(i);
printstring("-");
hexprint(i + 3);
printstring(": ");
hexprint(pu32Stack[i]);
printstring(" ");
hexprint32(pu32Stack[i + 1]);
printstring(" ");
hexprint32(pu32Stack[i + 2]);
printstring(" ");
hexprint32(pu32Stack[i + 3]);
printstring("\n");
}
#endif
#ifdef EXC_DUMP_STACK
/* Print the stack */
printstring("\nRAM top: ");
hexprint32(EXCEPTION_RAM_TOP);
printstring("\nSTACK: \n");
pu32Stack = (uint32 *)(u32Stack & 0xFFFFFFF0);
for(i = 0; (pu32Stack + i) < (uint32 *)(EXCEPTION_RAM_TOP); i += 4) {
printstring("@");
hexprint32((uint32)(pu32Stack + i));
printstring(": ");
hexprint32(pu32Stack[i]);
printstring(" ");
hexprint32(pu32Stack[i + 1]);
printstring(" ");
hexprint32(pu32Stack[i + 2]);
printstring(" ");
hexprint32(pu32Stack[i + 3]);
printstring("\n");
}
#endif
#if EXCEPTION_STALLS_SYSTEM
while(1) {
}
#else /* EXCEPTION_STALLS_SYSTEM */
/* Software reset */
vAHI_WatchdogException(0);
vAHI_SwReset();
#endif /* EXCEPTION_STALLS_SYSTEM */
}
/****************************************************************************
*
* NAME: heap_alloc_overflow_protect
*
* DESCRIPTION:
* New heap allocation function that sets the stack overflow location to the new
* top address of the heap.
*
* PARAMETERS: Name RW Usage
* pvPointer W Location of allocated heap memory
* u32Size R Number of bytes to allocate
* bClear R Flag to set new memory to 0
*
* RETURNS:
* Pointer to new memory
*
****************************************************************************/
static void *
heap_alloc_overflow_protect(void *pvPointer, uint32 u32Size, bool_t bClear)
{
void *pvAlloc;
/* Call original heap allocation function */
pvAlloc = prHeap_AllocOrig(pvPointer, u32Size, bClear);
/*
* Initialise the stack overflow exception to trigger if the end of the
* stack is reached. See the linker command file to adjust the allocated
* stack size.
*/
/* Set stack overflow address */
vAHI_SetStackOverflow(TRUE, ((uint32 *)&heap_location)[0]);
return pvAlloc;
}
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