len0rd/FreeRTOS-Kernel
1
0
Fork 0
mirror of https://github.com/FreeRTOS/FreeRTOS-Kernel.git synced 2025-09-02 12:24:07 -04:00
Code Issues Projects Releases Packages Wiki Activity

Add configINCLUDE_APPLICATION_DEFINED_PRIVILEGED_FUNCTIONS mechanism to allow the user to define functions that will execute in privileged mode.

Browse source 
Update the Rowley MPU demo to use a version of debug_printf that runs in privileged mode to get around the problem of the RAM it uses not being under the control of the kernel.
This commit is contained in:
Richard Barry 2013-06-07 09:37:18 +00:00
parent f904d26957
commit 0f3ae55e5d
5 changed files with 42 additions and 62 deletions
Download patch file Download diff file Expand all files Collapse all files

47
FreeRTOS/Demo/CORTEX_MPU_LM3Sxxxx_Rowley/main.c
View file

@ -56,19 +56,19 @@
***************************************************************************
http://www.FreeRTOS.org - Documentation, books, training, latest versions,
http://www.FreeRTOS.org - Documentation, books, training, latest versions,
license and Real Time Engineers Ltd. contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool, and our new
fully thread aware and reentrant UDP/IP stack.
http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
Integrity Systems, who sell the code with commercial support,
http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
Integrity Systems, who sell the code with commercial support,
indemnification and middleware, under the OpenRTOS brand.
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
engineered and independently SIL3 certified version for use in safety and
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
engineered and independently SIL3 certified version for use in safety and
mission critical applications that require provable dependability.
*/
@ -267,23 +267,6 @@ static const xTaskParameters xCheckTaskParameters =
}
};
/* Three MPU regions are defined for use by the 'check' task when the task is
created. These are only used to demonstrate the MPU features and are not
actually necessary for the check task to fulfill its primary purpose. Instead
the MPU regions are replaced with those defined by xAltRegions prior to the
check task receiving any data on the queue or printing any messages to the
debug console. The region configured by xAltRegions just gives the check task
access to the debug variables that form part of the Rowley library, and are
accessed within the debug_printf() function. */
extern unsigned long dbgCntrlWord_mempoll;
static const xMemoryRegion xAltRegions[ portNUM_CONFIGURABLE_REGIONS ] =
{
/* Base address Length Parameters */
{ ( void * ) &dbgCntrlWord_mempoll, 32, portMPU_REGION_READ_WRITE },
{ 0, 0, 0 },
{ 0, 0, 0 }
};
/*-----------------------------------------------------------*/
@ -396,22 +379,20 @@ long lMessage;
unsigned long ulStillAliveCounts[ 2 ] = { 0 };
const char *pcStatusMessage = "PASS\r\n";
/* The debug_printf() function uses RAM that is outside of the control of the
application writer. Therefore the application_defined_privileged_functions.h
header file is used to provide a version that executes with privileges. */
extern int MPU_debug_printf( const char *pcMessage );
/* Just to remove compiler warning. */
( void ) pvParameters;
/* Print out the amount of free heap space so configTOTAL_HEAP_SIZE can be
tuned. The heap size is set to be very small in this example and will need
to be increased before many more tasks, queues or semaphores can be
created. */
debug_printf( "There are %d bytes of unused heap space.\r\n", xPortGetFreeHeapSize() );
/* Demonstrate how the various memory regions can and can't be accessed.
The task privilege level is set down to user mode within this function. */
prvTestMemoryRegions();
/* Change the memory regions allocated to this task to those initially
set up for demonstration purposes to those actually required by the task. */
vTaskAllocateMPURegions( NULL, xAltRegions );
/* Tests are done so lower the privilege status. */
portSWITCH_TO_USER_MODE();
/* This loop performs the main function of the task, which is blocking
on a message queue then processing each message as it arrives. */
@ -445,7 +426,7 @@ const char *pcStatusMessage = "PASS\r\n";
/* Print a pass/fail message to the terminal. This will be
visible in the CrossWorks IDE. */
debug_printf( pcStatusMessage );
MPU_debug_printf( pcStatusMessage );
/* Reset the count of 'still alive' messages. */
memset( ulStillAliveCounts, 0x00, sizeof( ulStillAliveCounts ) );