402 lines
12 KiB
C
402 lines
12 KiB
C
/*
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* Copyright (c) 2015 NXP B.V.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of NXP B.V. nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY NXP B.V. AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NXP B.V. OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* Author: Thomas Haydon
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* Integrated into Contiki by Beshr Al Nahas
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*
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*/
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#include <jendefs.h>
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#include <AppHardwareApi.h>
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#include <MicroInt.h>
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#include "exceptions.h"
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#ifndef EXCEPTION_STALLS_SYSTEM
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#define EXCEPTION_STALLS_SYSTEM 0
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#endif /* EXCEPTION_STALLS_SYSTEM */
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#ifndef PRINT_STACK_ON_REBOOT
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#define PRINT_STACK_ON_REBOOT 1
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#endif /* PRINT_STACK_ON_REBOOT */
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/** Define to dump the stack on exception */
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#ifndef EXC_DUMP_STACK
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#define EXC_DUMP_STACK
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#endif /* EXC_DUMP_STACK */
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/** Define to dump registers on exception */
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#ifndef EXC_DUMP_REGS
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/* #define EXC_DUMP_REGS */
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#endif /* EXC_DUMP_REGS */
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/* Select whether exception vectors should be in RAM or Flash based on chip family */
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#if (defined JENNIC_CHIP_FAMILY_JN514x)
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#define EXCEPTION_VECTORS_LOCATION_RAM
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#elif (defined JENNIC_CHIP_FAMILY_JN516x)
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#define EXCEPTION_VECTORS_LOCATION_FLASH
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#else
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#error Unsupported chip family selected
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#endif /* JENNIC_CHIP_FAMILY */
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#if (defined EXCEPTION_VECTORS_LOCATION_RAM)
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/* RAM exception vectors are set up at run time */
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/* Addresses of exception vectors in RAM */
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#define BUS_ERROR *((volatile uint32 *)(0x4000000))
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#define TICK_TIMER *((volatile uint32 *)(0x4000004))
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#define UNALIGNED_ACCESS *((volatile uint32 *)(0x4000008))
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#define ILLEGAL_INSTRUCTION *((volatile uint32 *)(0x400000c))
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#define EXTERNAL_INTERRUPT *((volatile uint32 *)(0x4000010))
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#define SYSCALL *((volatile uint32 *)(0x4000014))
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#define TRAP *((volatile uint32 *)(0x4000018))
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#define GENERIC *((volatile uint32 *)(0x400001c))
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#define STACK_OVERFLOW *((volatile uint32 *)(0x4000020))
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#elif (defined EXCEPTION_VECTORS_LOCATION_FLASH)
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/* Flash exception vectors are set up at compile time */
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#else
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#error Unknown exception vector location
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#endif /* EXCEPTION_VECTORS_LOCATION */
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/* Locations in stack trace of important information */
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#define STACK_REG 1
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#define PROGRAM_COUNTER 18
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#define EFFECTIVE_ADDR 19
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/* Number of registers */
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#define REG_COUNT 16
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/* Chip dependant RAM size */
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#if defined(JENNIC_CHIP_JN5148) || defined(JENNIC_CHIP_JN5148J01)
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#define EXCEPTION_RAM_TOP 0x04020000
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#else
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#define EXCEPTION_RAM_TOP 0x04008000
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#endif
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static void exception_handler(uint32 *pu32Stack, eExceptionType eType);
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static void *heap_alloc_overflow_protect(void *pvPointer, uint32 u32Size, bool_t bClear);
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/*---------------------------------------------------------------------------*/
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#if PRINT_STACK_ON_REBOOT
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static void hexprint(uint8 v);
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static void hexprint32(uint32 v);
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static void printstring(const char *s);
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#endif /* PRINT_STACK_ON_REBOOT */
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/* For debugging */
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static const char *debug_filename = "nothing";
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static int debug_line = -1;
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void
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debug_file_line(const char *file, int line)
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{
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debug_filename = file;
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debug_line = line;
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}
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extern uint32 heap_location;
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extern void *(*prHeap_AllocFunc)(void *, uint32, bool_t);
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PRIVATE void *(*prHeap_AllocOrig)(void *, uint32, bool_t);
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/* Symbol defined by the linker script */
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/* marks the end of the stack */
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extern void *stack_low_water_mark;
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/****************************************************************************/
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/*** Local Functions ***/
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/****************************************************************************/
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/*---------------------------------------------------------------------------*/
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#if PRINT_STACK_ON_REBOOT
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#include "dev/uart0.h"
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#define printchar(X) uart0_write_direct(X)
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/*---------------------------------------------------------------------------*/
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static void
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hexprint(uint8 v)
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{
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const char hexconv[] = "0123456789abcdef";
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printchar(hexconv[v >> 4]);
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printchar(hexconv[v & 0x0f]);
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}
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/*---------------------------------------------------------------------------*/
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static void
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hexprint32(uint32 v)
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{
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hexprint(((uint32)v) >> (uint32)24);
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hexprint(((uint32)v) >> (uint32)16);
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hexprint(((uint32)v) >> (uint32)8);
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hexprint((v) & 0xff);
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}
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/*---------------------------------------------------------------------------*/
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static void
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printstring(const char *s)
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{
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while(*s) {
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printchar(*s++);
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}
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}
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#endif /* PRINT_STACK_ON_REBOOT */
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/****************************************************************************
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*
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* NAME: vEXC_Register
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*
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* DESCRIPTION:
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* Set up exceptions. When in RAM, overwrite the default vectors with ours.
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* We also patch the heap allocation function so that we can keep tabs on
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* the amount of free heap.
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*
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* PARAMETERS: None
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*
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* RETURNS:
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* None
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*
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****************************************************************************/
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PUBLIC void
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vEXC_Register(void)
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{
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#ifdef EXCEPTION_VECTORS_LOCATION_RAM
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/* Overwrite exception vectors, pointing them all at the generic handler */
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BUS_ERROR = (uint32)exception_handler;
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UNALIGNED_ACCESS = (uint32)exception_handler;
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ILLEGAL_INSTRUCTION = (uint32)exception_handler;
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SYSCALL = (uint32)exception_handler;
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TRAP = (uint32)exception_handler;
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GENERIC = (uint32)exception_handler;
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STACK_OVERFLOW = (uint32)exception_handler;
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#endif /* EXCEPTION_VECTORS_LOCATION */
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prHeap_AllocOrig = prHeap_AllocFunc;
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prHeap_AllocFunc = heap_alloc_overflow_protect;
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}
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#ifdef EXCEPTION_VECTORS_LOCATION_FLASH
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/* If exception vectors are in flash, define the handler functions here to be linked in */
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/* These function names are defined in the 6x linker script for the various exceptions */
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/* Point them all at the generic handler */
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PUBLIC void
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vException_BusError(uint32 *pu32Stack, eExceptionType eType)
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{
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exception_handler(pu32Stack, eType);
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}
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PUBLIC void
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vException_UnalignedAccess(uint32 *pu32Stack, eExceptionType eType)
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{
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exception_handler(pu32Stack, eType);
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}
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PUBLIC void
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vException_IllegalInstruction(uint32 *pu32Stack, eExceptionType eType)
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{
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exception_handler(pu32Stack, eType);
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}
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PUBLIC void
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vException_SysCall(uint32 *pu32Stack, eExceptionType eType)
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{
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exception_handler(pu32Stack, eType);
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}
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PUBLIC void
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vException_Trap(uint32 *pu32Stack, eExceptionType eType)
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{
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exception_handler(pu32Stack, eType);
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}
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PUBLIC void
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vException_StackOverflow(uint32 *pu32Stack, eExceptionType eType)
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{
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exception_handler(pu32Stack, eType);
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}
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#endif /* EXCEPTION_VECTORS_LOCATION_FLASH */
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/****************************************************************************
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*
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* NAME: exception_handler
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*
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* DESCRIPTION:
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* Generic exception handler which is called whether the vectors are in RAM or flash
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*
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* PARAMETERS: None
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*
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* RETURNS:
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* None
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*
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****************************************************************************/
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static void
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exception_handler(uint32 *pu32Stack, eExceptionType eType)
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{
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#if (defined EXC_DUMP_STACK) || (defined EXC_DUMP_REGS)
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int i;
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#endif
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uint32 u32EPCR, u32EEAR, u32Stack;
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char *pcString;
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MICRO_DISABLE_INTERRUPTS();
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switch(eType) {
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case E_EXC_BUS_ERROR:
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pcString = "BUS";
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break;
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case E_EXC_UNALIGNED_ACCESS:
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pcString = "ALIGN";
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break;
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case E_EXC_ILLEGAL_INSTRUCTION:
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pcString = "ILLEGAL";
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break;
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case E_EXC_SYSCALL:
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pcString = "SYSCALL";
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break;
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case E_EXC_TRAP:
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pcString = "TRAP";
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break;
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case E_EXC_GENERIC:
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pcString = "GENERIC";
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break;
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case E_EXC_STACK_OVERFLOW:
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pcString = "STACK";
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break;
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default:
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pcString = "UNKNOWN";
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break;
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}
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if(bAHI_WatchdogResetEvent()) {
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pcString = "WATCHDOG";
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}
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vAHI_WatchdogStop();
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/* Pull the EPCR and EEAR values from where they've been saved by the ROM exception handler */
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u32EPCR = pu32Stack[PROGRAM_COUNTER];
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u32EEAR = pu32Stack[EFFECTIVE_ADDR];
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u32Stack = pu32Stack[STACK_REG];
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/* Log the exception */
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printstring("\n\n\n");
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printstring(pcString);
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printstring(" EXCEPTION @ $");
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hexprint32(u32EPCR);
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printstring(" EA: ");
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hexprint32(u32EEAR);
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printstring(" SK: ");
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hexprint32(u32Stack);
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printstring(" HP: ");
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hexprint32(((uint32 *)&heap_location)[0]);
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printstring("\n");
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printstring(" File: ");
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printstring(debug_filename);
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printstring(" Line: ");
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hexprint32(debug_line);
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printstring("\n");
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#ifdef EXC_DUMP_REGS
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printstring("\nREGS: ");
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/* Pull and print the registers from saved locations */
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for(i = 0; i < REG_COUNT; i += 4) {
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printstring("R");
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hexprint(i);
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printstring("-");
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hexprint(i + 3);
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printstring(": ");
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hexprint(pu32Stack[i]);
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printstring(" ");
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hexprint32(pu32Stack[i + 1]);
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printstring(" ");
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hexprint32(pu32Stack[i + 2]);
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printstring(" ");
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hexprint32(pu32Stack[i + 3]);
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printstring("\n");
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}
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#endif
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#ifdef EXC_DUMP_STACK
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/* Print the stack */
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printstring("\nRAM top: ");
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hexprint32(EXCEPTION_RAM_TOP);
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printstring("\nSTACK: \n");
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pu32Stack = (uint32 *)(u32Stack & 0xFFFFFFF0);
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for(i = 0; (pu32Stack + i) < (uint32 *)(EXCEPTION_RAM_TOP); i += 4) {
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printstring("@");
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hexprint32((uint32)(pu32Stack + i));
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printstring(": ");
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hexprint32(pu32Stack[i]);
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printstring(" ");
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hexprint32(pu32Stack[i + 1]);
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printstring(" ");
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hexprint32(pu32Stack[i + 2]);
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printstring(" ");
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hexprint32(pu32Stack[i + 3]);
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printstring("\n");
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}
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#endif
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if(eType == E_EXC_SYSCALL) {
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return;
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}
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#if EXCEPTION_STALLS_SYSTEM
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while(1) {
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}
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#else /* EXCEPTION_STALLS_SYSTEM */
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/* Software reset */
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vAHI_WatchdogException(0);
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vAHI_SwReset();
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#endif /* EXCEPTION_STALLS_SYSTEM */
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}
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/****************************************************************************
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*
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* NAME: heap_alloc_overflow_protect
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*
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* DESCRIPTION:
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* New heap allocation function that sets the stack overflow location to the new
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* top address of the heap.
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*
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* PARAMETERS: Name RW Usage
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* pvPointer W Location of allocated heap memory
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* u32Size R Number of bytes to allocate
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* bClear R Flag to set new memory to 0
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*
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* RETURNS:
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* Pointer to new memory
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*
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****************************************************************************/
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static void *
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heap_alloc_overflow_protect(void *pvPointer, uint32 u32Size, bool_t bClear)
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{
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void *pvAlloc;
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/* Call original heap allocation function */
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pvAlloc = prHeap_AllocOrig(pvPointer, u32Size, bClear);
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/*
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* Initialise the stack overflow exception to trigger if the end of the
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* stack is reached. See the linker command file to adjust the allocated
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* stack size.
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*/
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/* Set stack overflow address */
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vAHI_SetStackOverflow(TRUE, ((uint32 *)&heap_location)[0]);
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return pvAlloc;
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}
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