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Recreated MicroBlaze example using Vivado 2016.1 - the Microblaze project is still a work in progress - not yet fully functional.
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Richard Barry
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48 changed files with 7675 additions and 316 deletions
324
FreeRTOS/Source/portable/GCC/MicroBlazeV9/port_exceptions.c
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324
FreeRTOS/Source/portable/GCC/MicroBlazeV9/port_exceptions.c
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/*
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FreeRTOS V9.0.0rc2 - Copyright (C) 2016 Real Time Engineers Ltd.
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All rights reserved
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VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
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***************************************************************************
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>>! NOTE: The modification to the GPL is included to allow you to !<<
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>>! distribute a combined work that includes FreeRTOS without being !<<
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>>! obliged to provide the source code for proprietary components !<<
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>>! outside of the FreeRTOS kernel. !<<
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***************************************************************************
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. Full license text is available on the following
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link: http://www.freertos.org/a00114.html
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***************************************************************************
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* *
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* FreeRTOS provides completely free yet professionally developed, *
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* robust, strictly quality controlled, supported, and cross *
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* platform software that is more than just the market leader, it *
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* is the industry's de facto standard. *
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* *
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* Help yourself get started quickly while simultaneously helping *
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* to support the FreeRTOS project by purchasing a FreeRTOS *
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* tutorial book, reference manual, or both: *
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* http://www.FreeRTOS.org/Documentation *
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* *
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***************************************************************************
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http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
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the FAQ page "My application does not run, what could be wrong?". Have you
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defined configASSERT()?
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http://www.FreeRTOS.org/support - In return for receiving this top quality
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embedded software for free we request you assist our global community by
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participating in the support forum.
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http://www.FreeRTOS.org/training - Investing in training allows your team to
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be as productive as possible as early as possible. Now you can receive
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FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
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Ltd, and the world's leading authority on the world's leading RTOS.
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http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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compatible FAT file system, and our tiny thread aware UDP/IP stack.
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http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
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Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
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http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
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Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
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licenses offer ticketed support, indemnification and commercial middleware.
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http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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engineered and independently SIL3 certified version for use in safety and
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mission critical applications that require provable dependability.
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1 tab == 4 spaces!
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*/
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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/* Hardware includes. */
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#include <microblaze_exceptions_i.h>
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#include <microblaze_exceptions_g.h>
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/* The Xilinx library defined exception entry point stacks a number of
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registers. These definitions are offsets from the stack pointer to the various
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stacked register values. */
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#define portexR3_STACK_OFFSET 4
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#define portexR4_STACK_OFFSET 5
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#define portexR5_STACK_OFFSET 6
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#define portexR6_STACK_OFFSET 7
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#define portexR7_STACK_OFFSET 8
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#define portexR8_STACK_OFFSET 9
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#define portexR9_STACK_OFFSET 10
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#define portexR10_STACK_OFFSET 11
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#define portexR11_STACK_OFFSET 12
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#define portexR12_STACK_OFFSET 13
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#define portexR15_STACK_OFFSET 16
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#define portexR18_STACK_OFFSET 19
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#define portexMSR_STACK_OFFSET 20
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#define portexR19_STACK_OFFSET -1
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/* This is defined to equal the size, in bytes, of the stack frame generated by
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the Xilinx standard library exception entry point. It is required to determine
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the stack pointer value prior to the exception being entered. */
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#define portexASM_HANDLER_STACK_FRAME_SIZE 84UL
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/* The number of bytes a MicroBlaze instruction consumes. */
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#define portexINSTRUCTION_SIZE 4
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/* Exclude this entire file if the MicroBlaze is not configured to handle
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exceptions, or the application defined configuration constant
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configINSTALL_EXCEPTION_HANDLERS is not set to 1. */
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#if ( MICROBLAZE_EXCEPTIONS_ENABLED == 1 ) && ( configINSTALL_EXCEPTION_HANDLERS == 1 )
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/* This variable is set in the exception entry code, before
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vPortExceptionHandler is called. */
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uint32_t *pulStackPointerOnFunctionEntry = NULL;
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/* This is the structure that is filled with the MicroBlaze context as it
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existed immediately prior to the exception occurrence. A pointer to this
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structure is passed into the vApplicationExceptionRegisterDump() callback
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function, if one is defined. */
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static xPortRegisterDump xRegisterDump;
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/* This is the FreeRTOS exception handler that is installed for all exception
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types. It is called from vPortExceptionHanlderEntry() - which is itself defined
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in portasm.S. */
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void vPortExceptionHandler( void *pvExceptionID );
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extern void vPortExceptionHandlerEntry( void *pvExceptionID );
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/*-----------------------------------------------------------*/
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/* vApplicationExceptionRegisterDump() is a callback function that the
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application can optionally define to receive a populated xPortRegisterDump
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structure. If the application chooses not to define a version of
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vApplicationExceptionRegisterDump() then this weekly defined default
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implementation will be called instead. */
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extern void vApplicationExceptionRegisterDump( xPortRegisterDump *xRegisterDump ) __attribute__((weak));
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void vApplicationExceptionRegisterDump( xPortRegisterDump *xRegisterDump )
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{
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( void ) xRegisterDump;
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for( ;; )
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{
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portNOP();
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}
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}
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/*-----------------------------------------------------------*/
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void vPortExceptionHandler( void *pvExceptionID )
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{
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extern void *pxCurrentTCB;
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/* Fill an xPortRegisterDump structure with the MicroBlaze context as it
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was immediately before the exception occurrence. */
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/* First fill in the name and handle of the task that was in the Running
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state when the exception occurred. */
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xRegisterDump.xCurrentTaskHandle = pxCurrentTCB;
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xRegisterDump.pcCurrentTaskName = pcTaskGetName( NULL );
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configASSERT( pulStackPointerOnFunctionEntry );
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/* Obtain the values of registers that were stacked prior to this function
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being called, and may have changed since they were stacked. */
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xRegisterDump.ulR3 = pulStackPointerOnFunctionEntry[ portexR3_STACK_OFFSET ];
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xRegisterDump.ulR4 = pulStackPointerOnFunctionEntry[ portexR4_STACK_OFFSET ];
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xRegisterDump.ulR5 = pulStackPointerOnFunctionEntry[ portexR5_STACK_OFFSET ];
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xRegisterDump.ulR6 = pulStackPointerOnFunctionEntry[ portexR6_STACK_OFFSET ];
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xRegisterDump.ulR7 = pulStackPointerOnFunctionEntry[ portexR7_STACK_OFFSET ];
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xRegisterDump.ulR8 = pulStackPointerOnFunctionEntry[ portexR8_STACK_OFFSET ];
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xRegisterDump.ulR9 = pulStackPointerOnFunctionEntry[ portexR9_STACK_OFFSET ];
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xRegisterDump.ulR10 = pulStackPointerOnFunctionEntry[ portexR10_STACK_OFFSET ];
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xRegisterDump.ulR11 = pulStackPointerOnFunctionEntry[ portexR11_STACK_OFFSET ];
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xRegisterDump.ulR12 = pulStackPointerOnFunctionEntry[ portexR12_STACK_OFFSET ];
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xRegisterDump.ulR15_return_address_from_subroutine = pulStackPointerOnFunctionEntry[ portexR15_STACK_OFFSET ];
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xRegisterDump.ulR18 = pulStackPointerOnFunctionEntry[ portexR18_STACK_OFFSET ];
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xRegisterDump.ulR19 = pulStackPointerOnFunctionEntry[ portexR19_STACK_OFFSET ];
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xRegisterDump.ulMSR = pulStackPointerOnFunctionEntry[ portexMSR_STACK_OFFSET ];
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/* Obtain the value of all other registers. */
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xRegisterDump.ulR2_small_data_area = mfgpr( R2 );
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xRegisterDump.ulR13_read_write_small_data_area = mfgpr( R13 );
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xRegisterDump.ulR14_return_address_from_interrupt = mfgpr( R14 );
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xRegisterDump.ulR16_return_address_from_trap = mfgpr( R16 );
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xRegisterDump.ulR17_return_address_from_exceptions = mfgpr( R17 );
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xRegisterDump.ulR20 = mfgpr( R20 );
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xRegisterDump.ulR21 = mfgpr( R21 );
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xRegisterDump.ulR22 = mfgpr( R22 );
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xRegisterDump.ulR23 = mfgpr( R23 );
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xRegisterDump.ulR24 = mfgpr( R24 );
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xRegisterDump.ulR25 = mfgpr( R25 );
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xRegisterDump.ulR26 = mfgpr( R26 );
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xRegisterDump.ulR27 = mfgpr( R27 );
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xRegisterDump.ulR28 = mfgpr( R28 );
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xRegisterDump.ulR29 = mfgpr( R29 );
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xRegisterDump.ulR30 = mfgpr( R30 );
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xRegisterDump.ulR31 = mfgpr( R31 );
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xRegisterDump.ulR1_SP = ( ( uint32_t ) pulStackPointerOnFunctionEntry ) + portexASM_HANDLER_STACK_FRAME_SIZE;
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xRegisterDump.ulEAR = mfear();
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xRegisterDump.ulESR = mfesr();
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xRegisterDump.ulEDR = mfedr();
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/* Move the saved program counter back to the instruction that was executed
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when the exception occurred. This is only valid for certain types of
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exception. */
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xRegisterDump.ulPC = xRegisterDump.ulR17_return_address_from_exceptions - portexINSTRUCTION_SIZE;
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#if( XPAR_MICROBLAZE_USE_FPU != 0 )
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{
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xRegisterDump.ulFSR = mffsr();
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}
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#else
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{
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xRegisterDump.ulFSR = 0UL;
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}
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#endif
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/* Also fill in a string that describes what type of exception this is.
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The string uses the same ID names as defined in the MicroBlaze standard
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library exception header files. */
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switch( ( uint32_t ) pvExceptionID )
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{
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case XEXC_ID_FSL :
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xRegisterDump.pcExceptionCause = ( int8_t * const ) "XEXC_ID_FSL";
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break;
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case XEXC_ID_UNALIGNED_ACCESS :
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xRegisterDump.pcExceptionCause = ( int8_t * const ) "XEXC_ID_UNALIGNED_ACCESS";
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break;
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case XEXC_ID_ILLEGAL_OPCODE :
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xRegisterDump.pcExceptionCause = ( int8_t * const ) "XEXC_ID_ILLEGAL_OPCODE";
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break;
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case XEXC_ID_M_AXI_I_EXCEPTION :
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xRegisterDump.pcExceptionCause = ( int8_t * const ) "XEXC_ID_M_AXI_I_EXCEPTION or XEXC_ID_IPLB_EXCEPTION";
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break;
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case XEXC_ID_M_AXI_D_EXCEPTION :
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xRegisterDump.pcExceptionCause = ( int8_t * const ) "XEXC_ID_M_AXI_D_EXCEPTION or XEXC_ID_DPLB_EXCEPTION";
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break;
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case XEXC_ID_DIV_BY_ZERO :
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xRegisterDump.pcExceptionCause = ( int8_t * const ) "XEXC_ID_DIV_BY_ZERO";
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break;
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case XEXC_ID_STACK_VIOLATION :
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xRegisterDump.pcExceptionCause = ( int8_t * const ) "XEXC_ID_STACK_VIOLATION or XEXC_ID_MMU";
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break;
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#if( XPAR_MICROBLAZE_USE_FPU != 0 )
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case XEXC_ID_FPU :
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xRegisterDump.pcExceptionCause = ( int8_t * const ) "XEXC_ID_FPU see ulFSR value";
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break;
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#endif /* XPAR_MICROBLAZE_USE_FPU */
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}
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/* vApplicationExceptionRegisterDump() is a callback function that the
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application can optionally define to receive the populated xPortRegisterDump
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structure. If the application chooses not to define a version of
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vApplicationExceptionRegisterDump() then the weekly defined default
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implementation within this file will be called instead. */
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vApplicationExceptionRegisterDump( &xRegisterDump );
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/* Must not attempt to leave this function! */
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for( ;; )
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{
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portNOP();
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}
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}
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/*-----------------------------------------------------------*/
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void vPortExceptionsInstallHandlers( void )
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{
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static uint32_t ulHandlersAlreadyInstalled = pdFALSE;
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if( ulHandlersAlreadyInstalled == pdFALSE )
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{
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ulHandlersAlreadyInstalled = pdTRUE;
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#if XPAR_MICROBLAZE_UNALIGNED_EXCEPTIONS == 1
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microblaze_register_exception_handler( XEXC_ID_UNALIGNED_ACCESS, vPortExceptionHandlerEntry, ( void * ) XEXC_ID_UNALIGNED_ACCESS );
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#endif /* XPAR_MICROBLAZE_UNALIGNED_EXCEPTIONS*/
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#if XPAR_MICROBLAZE_ILL_OPCODE_EXCEPTION == 1
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microblaze_register_exception_handler( XEXC_ID_ILLEGAL_OPCODE, vPortExceptionHandlerEntry, ( void * ) XEXC_ID_ILLEGAL_OPCODE );
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#endif /* XPAR_MICROBLAZE_ILL_OPCODE_EXCEPTION */
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#if XPAR_MICROBLAZE_M_AXI_I_BUS_EXCEPTION == 1
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microblaze_register_exception_handler( XEXC_ID_M_AXI_I_EXCEPTION, vPortExceptionHandlerEntry, ( void * ) XEXC_ID_M_AXI_I_EXCEPTION );
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#endif /* XPAR_MICROBLAZE_M_AXI_I_BUS_EXCEPTION */
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#if XPAR_MICROBLAZE_M_AXI_D_BUS_EXCEPTION == 1
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microblaze_register_exception_handler( XEXC_ID_M_AXI_D_EXCEPTION, vPortExceptionHandlerEntry, ( void * ) XEXC_ID_M_AXI_D_EXCEPTION );
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#endif /* XPAR_MICROBLAZE_M_AXI_D_BUS_EXCEPTION */
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#if XPAR_MICROBLAZE_IPLB_BUS_EXCEPTION == 1
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microblaze_register_exception_handler( XEXC_ID_IPLB_EXCEPTION, vPortExceptionHandlerEntry, ( void * ) XEXC_ID_IPLB_EXCEPTION );
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#endif /* XPAR_MICROBLAZE_IPLB_BUS_EXCEPTION */
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#if XPAR_MICROBLAZE_DPLB_BUS_EXCEPTION == 1
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microblaze_register_exception_handler( XEXC_ID_DPLB_EXCEPTION, vPortExceptionHandlerEntry, ( void * ) XEXC_ID_DPLB_EXCEPTION );
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#endif /* XPAR_MICROBLAZE_DPLB_BUS_EXCEPTION */
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#if XPAR_MICROBLAZE_DIV_ZERO_EXCEPTION == 1
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microblaze_register_exception_handler( XEXC_ID_DIV_BY_ZERO, vPortExceptionHandlerEntry, ( void * ) XEXC_ID_DIV_BY_ZERO );
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#endif /* XPAR_MICROBLAZE_DIV_ZERO_EXCEPTION */
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#if XPAR_MICROBLAZE_FPU_EXCEPTION == 1
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microblaze_register_exception_handler( XEXC_ID_FPU, vPortExceptionHandlerEntry, ( void * ) XEXC_ID_FPU );
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#endif /* XPAR_MICROBLAZE_FPU_EXCEPTION */
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#if XPAR_MICROBLAZE_FSL_EXCEPTION == 1
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microblaze_register_exception_handler( XEXC_ID_FSL, vPortExceptionHandlerEntry, ( void * ) XEXC_ID_FSL );
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#endif /* XPAR_MICROBLAZE_FSL_EXCEPTION */
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microblaze_enable_exceptions();
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}
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}
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/* Exclude the entire file if the MicroBlaze is not configured to handle
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exceptions, or the application defined configuration item
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configINSTALL_EXCEPTION_HANDLERS is not set to 1. */
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#endif /* ( MICROBLAZE_EXCEPTIONS_ENABLED == 1 ) && ( configINSTALL_EXCEPTION_HANDLERS == 1 ) */
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