591 lines
23 KiB
C
591 lines
23 KiB
C
/*
|
|
FreeRTOS V8.2.0 - Copyright (C) 2015 Real Time Engineers Ltd.
|
|
All rights reserved
|
|
|
|
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
|
|
|
|
This file is part of the FreeRTOS distribution.
|
|
|
|
FreeRTOS is free software; you can redistribute it and/or modify it under
|
|
the terms of the GNU General Public License (version 2) as published by the
|
|
Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
|
|
|
|
***************************************************************************
|
|
>>! NOTE: The modification to the GPL is included to allow you to !<<
|
|
>>! distribute a combined work that includes FreeRTOS without being !<<
|
|
>>! obliged to provide the source code for proprietary components !<<
|
|
>>! outside of the FreeRTOS kernel. !<<
|
|
***************************************************************************
|
|
|
|
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
FOR A PARTICULAR PURPOSE. Full license text is available on the following
|
|
link: http://www.freertos.org/a00114.html
|
|
|
|
***************************************************************************
|
|
* *
|
|
* FreeRTOS provides completely free yet professionally developed, *
|
|
* robust, strictly quality controlled, supported, and cross *
|
|
* platform software that is more than just the market leader, it *
|
|
* is the industry's de facto standard. *
|
|
* *
|
|
* Help yourself get started quickly while simultaneously helping *
|
|
* to support the FreeRTOS project by purchasing a FreeRTOS *
|
|
* tutorial book, reference manual, or both: *
|
|
* http://www.FreeRTOS.org/Documentation *
|
|
* *
|
|
***************************************************************************
|
|
|
|
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
|
|
the FAQ page "My application does not run, what could be wrong?". Have you
|
|
defined configASSERT()?
|
|
|
|
http://www.FreeRTOS.org/support - In return for receiving this top quality
|
|
embedded software for free we request you assist our global community by
|
|
participating in the support forum.
|
|
|
|
http://www.FreeRTOS.org/training - Investing in training allows your team to
|
|
be as productive as possible as early as possible. Now you can receive
|
|
FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
|
|
Ltd, and the world's leading authority on the world's leading RTOS.
|
|
|
|
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
|
|
including FreeRTOS+Trace - an indispensable productivity tool, a DOS
|
|
compatible FAT file system, and our tiny thread aware UDP/IP stack.
|
|
|
|
http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
|
|
Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
|
|
|
|
http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
|
|
Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
|
|
licenses offer ticketed support, indemnification and commercial middleware.
|
|
|
|
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.
|
|
|
|
1 tab == 4 spaces!
|
|
*/
|
|
|
|
/*
|
|
* This is a heap allocator that can allocate memory out of several tagged memory regions,
|
|
* with the regions having differing capabilities. In the ESP32, this is used to
|
|
* allocate memory for the various applications within the space the MMU allows them
|
|
* to work with. It can also be used to e.g. allocate memory in DMA-capable regions.
|
|
*
|
|
* Usage notes:
|
|
*
|
|
* vPortDefineHeapRegions() ***must*** be called before pvPortMalloc().
|
|
* pvPortMalloc() will be called if any task objects (tasks, queues, event
|
|
* groups, etc.) are created, therefore vPortDefineHeapRegions() ***must*** be
|
|
* called before any other objects are defined.
|
|
*
|
|
* vPortDefineHeapRegions() takes a single parameter. The parameter is an array
|
|
* of HeapRegionTagged_t structures. HeapRegion_t is defined in portable.h as
|
|
*
|
|
* typedef struct HeapRegion
|
|
* {
|
|
* uint8_t *pucStartAddress; << Start address of a block of memory that will be part of the heap.
|
|
* size_t xSizeInBytes; << Size of the block of memory.
|
|
* BaseType_t xTag; << Tag
|
|
* } HeapRegionTagged_t;
|
|
*
|
|
* 'Tag' allows you to allocate memory of a certain type. Tag -1 is special;
|
|
* it basically tells the allocator to ignore this region as if it is not
|
|
* in the array at all. This facilitates disabling memory regions.
|
|
*
|
|
* The array is terminated using a NULL zero sized region definition, and the
|
|
* memory regions defined in the array ***must*** appear in address order from
|
|
* low address to high address. So the following is a valid example of how
|
|
* to use the function.
|
|
*
|
|
* HeapRegionTagged_t xHeapRegions[] =
|
|
* {
|
|
* { ( uint8_t * ) 0x80000000UL, 0x10000, 1 }, << Defines a block of 0x10000 bytes starting at address 0x80000000, tag 1
|
|
* { ( uint8_t * ) 0x90000000UL, 0xa0000, 2 }, << Defines a block of 0xa0000 bytes starting at address of 0x90000000, tag 2
|
|
* { NULL, 0, 0 } << Terminates the array.
|
|
* };
|
|
*
|
|
* vPortDefineHeapRegions( xHeapRegions ); << Pass the array into vPortDefineHeapRegions().
|
|
*
|
|
* Note 0x80000000 is the lower address so appears in the array first.
|
|
*
|
|
* pvPortMallocTagged can be used to get memory in a tagged region.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
|
|
ToDo:
|
|
- This malloc implementation can be somewhat slow, especially when it is called multiple times with multiple tags
|
|
when having low memory issues. ToDo: Make it quicker.
|
|
-JD
|
|
*/
|
|
|
|
|
|
#include <stdlib.h>
|
|
|
|
/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
|
|
all the API functions to use the MPU wrappers. That should only be done when
|
|
task.h is included from an application file. */
|
|
#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
|
|
|
|
#include "FreeRTOS.h"
|
|
#include "task.h"
|
|
#include "heap_regions_debug.h"
|
|
|
|
#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
|
|
|
|
#include "heap_regions.h"
|
|
|
|
#include "rom/ets_sys.h"
|
|
|
|
/* Block sizes must not get too small. */
|
|
#define heapMINIMUM_BLOCK_SIZE ( ( size_t ) ( uxHeapStructSize << 1 ) )
|
|
|
|
/* Assumes 8bit bytes! */
|
|
#define heapBITS_PER_BYTE ( ( size_t ) 8 )
|
|
|
|
/* Define the linked list structure. This is used to link free blocks in order
|
|
of their memory address. This is optimized for size of the linked list struct
|
|
and assumes a region is never larger than 16MiB. */
|
|
#define HEAPREGIONS_MAX_REGIONSIZE (16*1024*1024)
|
|
typedef struct A_BLOCK_LINK
|
|
{
|
|
struct A_BLOCK_LINK *pxNextFreeBlock; /*<< The next free block in the list. */
|
|
int xBlockSize: 24; /*<< The size of the free block. */
|
|
int xTag: 7; /*<< Tag of this region */
|
|
int xAllocated: 1; /*<< 1 if allocated */
|
|
} BlockLink_t;
|
|
|
|
//Mux to protect the memory status data
|
|
static portMUX_TYPE xMallocMutex = portMUX_INITIALIZER_UNLOCKED;
|
|
|
|
/*-----------------------------------------------------------*/
|
|
|
|
/*
|
|
* Inserts a block of memory that is being freed into the correct position in
|
|
* the list of free memory blocks. The block being freed will be merged with
|
|
* the block in front it and/or the block behind it if the memory blocks are
|
|
* adjacent to each other.
|
|
*/
|
|
static void prvInsertBlockIntoFreeList( BlockLink_t *pxBlockToInsert );
|
|
|
|
/*-----------------------------------------------------------*/
|
|
|
|
/* The size of the structure placed at the beginning of each allocated memory
|
|
block must be correctly byte aligned. */
|
|
static const uint32_t uxHeapStructSize = ( ( sizeof ( BlockLink_t ) + BLOCK_HEAD_LEN + BLOCK_TAIL_LEN + ( portBYTE_ALIGNMENT - 1 ) ) & ~portBYTE_ALIGNMENT_MASK );
|
|
|
|
/* Create a couple of list links to mark the start and end of the list. */
|
|
static BlockLink_t xStart, *pxEnd = NULL;
|
|
|
|
/* Keeps track of the number of free bytes remaining, but says nothing about
|
|
fragmentation. */
|
|
static size_t xFreeBytesRemaining[HEAPREGIONS_MAX_TAGCOUNT] = {0};
|
|
static size_t xMinimumEverFreeBytesRemaining[HEAPREGIONS_MAX_TAGCOUNT] = {0};
|
|
|
|
|
|
/*-----------------------------------------------------------*/
|
|
|
|
void *pvPortMallocTagged( size_t xWantedSize, BaseType_t tag )
|
|
{
|
|
BlockLink_t *pxBlock, *pxPreviousBlock, *pxNewBlockLink;
|
|
void *pvReturn = NULL;
|
|
|
|
/* The heap must be initialised before the first call to
|
|
prvPortMalloc(). */
|
|
configASSERT( pxEnd );
|
|
|
|
taskENTER_CRITICAL(&xMallocMutex);
|
|
{
|
|
/* The wanted size is increased so it can contain a BlockLink_t
|
|
structure in addition to the requested amount of bytes. */
|
|
if( xWantedSize > 0 )
|
|
{
|
|
xWantedSize += uxHeapStructSize;
|
|
|
|
/* Ensure that blocks are always aligned to the required number
|
|
of bytes. */
|
|
if( ( xWantedSize & portBYTE_ALIGNMENT_MASK ) != 0x00 )
|
|
{
|
|
/* Byte alignment required. */
|
|
xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
|
|
if( ( xWantedSize > 0 ) && ( xWantedSize <= xFreeBytesRemaining[ tag ] ) )
|
|
{
|
|
/* Traverse the list from the start (lowest address) block until
|
|
one of adequate size is found. */
|
|
pxPreviousBlock = &xStart;
|
|
pxBlock = xStart.pxNextFreeBlock;
|
|
while( ( ( pxBlock->xTag != tag ) || ( pxBlock->xBlockSize < xWantedSize ) ) && ( pxBlock->pxNextFreeBlock != NULL ) )
|
|
{
|
|
// ets_printf("Block %x -> %x\n", (uint32_t)pxBlock, (uint32_t)pxBlock->pxNextFreeBlock);
|
|
|
|
#if (configENABLE_MEMORY_DEBUG == 1)
|
|
{
|
|
mem_check_block(pxBlock);
|
|
}
|
|
#endif
|
|
|
|
pxPreviousBlock = pxBlock;
|
|
pxBlock = pxBlock->pxNextFreeBlock;
|
|
}
|
|
|
|
/* If the end marker was not reached then a block of adequate size
|
|
was found. */
|
|
if( pxBlock != pxEnd )
|
|
{
|
|
/* Return the memory space pointed to - jumping over the
|
|
BlockLink_t structure at its start. */
|
|
pvReturn = ( void * ) ( ( ( uint8_t * ) pxPreviousBlock->pxNextFreeBlock ) + uxHeapStructSize - BLOCK_TAIL_LEN - BLOCK_HEAD_LEN);
|
|
|
|
/* This block is being returned for use so must be taken out
|
|
of the list of free blocks. */
|
|
pxPreviousBlock->pxNextFreeBlock = pxBlock->pxNextFreeBlock;
|
|
|
|
/* If the block is larger than required it can be split into
|
|
two. */
|
|
|
|
if( ( pxBlock->xBlockSize - xWantedSize ) > heapMINIMUM_BLOCK_SIZE )
|
|
{
|
|
/* This block is to be split into two. Create a new
|
|
block following the number of bytes requested. The void
|
|
cast is used to prevent byte alignment warnings from the
|
|
compiler. */
|
|
pxNewBlockLink = ( void * ) ( ( ( uint8_t * ) pxBlock ) + xWantedSize);
|
|
|
|
/* Calculate the sizes of two blocks split from the
|
|
single block. */
|
|
pxNewBlockLink->xBlockSize = pxBlock->xBlockSize - xWantedSize;
|
|
pxNewBlockLink->xTag = tag;
|
|
pxBlock->xBlockSize = xWantedSize;
|
|
|
|
#if (configENABLE_MEMORY_DEBUG == 1)
|
|
{
|
|
mem_init_dog(pxNewBlockLink);
|
|
}
|
|
#endif
|
|
|
|
|
|
/* Insert the new block into the list of free blocks. */
|
|
prvInsertBlockIntoFreeList( ( pxNewBlockLink ) );
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
|
|
xFreeBytesRemaining[ tag ] -= pxBlock->xBlockSize;
|
|
|
|
if( xFreeBytesRemaining[ tag ] < xMinimumEverFreeBytesRemaining[ tag ] )
|
|
{
|
|
xMinimumEverFreeBytesRemaining[ tag ] = xFreeBytesRemaining[ tag ];
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
|
|
/* The block is being returned - it is allocated and owned
|
|
by the application and has no "next" block. */
|
|
pxBlock->xAllocated = 1;
|
|
pxBlock->pxNextFreeBlock = NULL;
|
|
|
|
#if (configENABLE_MEMORY_DEBUG == 1)
|
|
{
|
|
mem_init_dog(pxBlock);
|
|
mem_malloc_block(pxBlock);
|
|
}
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
|
|
traceMALLOC( pvReturn, xWantedSize );
|
|
}
|
|
taskEXIT_CRITICAL(&xMallocMutex);
|
|
|
|
#if( configUSE_MALLOC_FAILED_HOOK == 1 )
|
|
{
|
|
if( pvReturn == NULL )
|
|
{
|
|
extern void vApplicationMallocFailedHook( void );
|
|
vApplicationMallocFailedHook();
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return pvReturn;
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
void vPortFreeTagged( void *pv )
|
|
{
|
|
uint8_t *puc = ( uint8_t * ) pv;
|
|
BlockLink_t *pxLink;
|
|
|
|
if( pv != NULL )
|
|
{
|
|
/* The memory being freed will have an BlockLink_t structure immediately
|
|
before it. */
|
|
puc -= (uxHeapStructSize - BLOCK_TAIL_LEN - BLOCK_HEAD_LEN) ;
|
|
|
|
/* This casting is to keep the compiler from issuing warnings. */
|
|
pxLink = ( void * ) puc;
|
|
|
|
#if (configENABLE_MEMORY_DEBUG == 1)
|
|
{
|
|
taskENTER_CRITICAL(&xMallocMutex);
|
|
mem_check_block(pxLink);
|
|
mem_free_block(pxLink);
|
|
taskEXIT_CRITICAL(&xMallocMutex);
|
|
}
|
|
#endif
|
|
|
|
/* Check the block is actually allocated. */
|
|
configASSERT( ( pxLink->xAllocated ) != 0 );
|
|
configASSERT( pxLink->pxNextFreeBlock == NULL );
|
|
|
|
if( pxLink->xAllocated != 0 )
|
|
{
|
|
if( pxLink->pxNextFreeBlock == NULL )
|
|
{
|
|
/* The block is being returned to the heap - it is no longer
|
|
allocated. */
|
|
pxLink->xAllocated = 0;
|
|
|
|
taskENTER_CRITICAL(&xMallocMutex);
|
|
{
|
|
/* Add this block to the list of free blocks. */
|
|
xFreeBytesRemaining[ pxLink->xTag ] += pxLink->xBlockSize;
|
|
traceFREE( pv, pxLink->xBlockSize );
|
|
prvInsertBlockIntoFreeList( ( ( BlockLink_t * ) pxLink ) );
|
|
}
|
|
taskEXIT_CRITICAL(&xMallocMutex);
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
size_t xPortGetFreeHeapSizeTagged( BaseType_t tag )
|
|
{
|
|
return xFreeBytesRemaining[ tag ];
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
size_t xPortGetMinimumEverFreeHeapSizeTagged( BaseType_t tag )
|
|
{
|
|
return xMinimumEverFreeBytesRemaining[ tag ];
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
static void prvInsertBlockIntoFreeList( BlockLink_t *pxBlockToInsert )
|
|
{
|
|
BlockLink_t *pxIterator;
|
|
uint8_t *puc;
|
|
|
|
/* Iterate through the list until a block is found that has a higher address
|
|
than the block being inserted. */
|
|
for( pxIterator = &xStart; pxIterator->pxNextFreeBlock < pxBlockToInsert; pxIterator = pxIterator->pxNextFreeBlock )
|
|
{
|
|
/* Nothing to do here, just iterate to the right position. */
|
|
}
|
|
|
|
/* Do the block being inserted, and the block it is being inserted after
|
|
make a contiguous block of memory, and are the tags the same? */
|
|
puc = ( uint8_t * ) pxIterator;
|
|
if( ( puc + pxIterator->xBlockSize ) == ( uint8_t * ) pxBlockToInsert && pxBlockToInsert->xTag==pxIterator->xTag)
|
|
{
|
|
pxIterator->xBlockSize += pxBlockToInsert->xBlockSize;
|
|
pxBlockToInsert = pxIterator;
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
|
|
/* Do the block being inserted, and the block it is being inserted before
|
|
make a contiguous block of memory, and are the tags the same */
|
|
puc = ( uint8_t * ) pxBlockToInsert;
|
|
if( ( puc + pxBlockToInsert->xBlockSize ) == ( uint8_t * ) pxIterator->pxNextFreeBlock && pxBlockToInsert->xTag==pxIterator->pxNextFreeBlock->xTag )
|
|
{
|
|
if( pxIterator->pxNextFreeBlock != pxEnd )
|
|
{
|
|
/* Form one big block from the two blocks. */
|
|
pxBlockToInsert->xBlockSize += pxIterator->pxNextFreeBlock->xBlockSize;
|
|
pxBlockToInsert->pxNextFreeBlock = pxIterator->pxNextFreeBlock->pxNextFreeBlock;
|
|
}
|
|
else
|
|
{
|
|
pxBlockToInsert->pxNextFreeBlock = pxEnd;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
pxBlockToInsert->pxNextFreeBlock = pxIterator->pxNextFreeBlock;
|
|
}
|
|
|
|
/* If the block being inserted plugged a gap, so was merged with the block
|
|
before and the block after, then it's pxNextFreeBlock pointer will have
|
|
already been set, and should not be set here as that would make it point
|
|
to itself. */
|
|
if( pxIterator != pxBlockToInsert )
|
|
{
|
|
pxIterator->pxNextFreeBlock = pxBlockToInsert;
|
|
}
|
|
else
|
|
{
|
|
mtCOVERAGE_TEST_MARKER();
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
void vPortDefineHeapRegionsTagged( const HeapRegionTagged_t * const pxHeapRegions )
|
|
{
|
|
BlockLink_t *pxFirstFreeBlockInRegion = NULL, *pxPreviousFreeBlock;
|
|
uint8_t *pucAlignedHeap;
|
|
size_t xTotalRegionSize, xTotalHeapSize = 0;
|
|
BaseType_t xDefinedRegions = 0, xRegIdx = 0;
|
|
uint32_t ulAddress;
|
|
const HeapRegionTagged_t *pxHeapRegion;
|
|
|
|
/* Can only call once! */
|
|
configASSERT( pxEnd == NULL );
|
|
|
|
vPortCPUInitializeMutex(&xMallocMutex);
|
|
|
|
pxHeapRegion = &( pxHeapRegions[ xRegIdx ] );
|
|
|
|
while( pxHeapRegion->xSizeInBytes > 0 )
|
|
{
|
|
if ( pxHeapRegion->xTag == -1 ) {
|
|
/* Move onto the next HeapRegionTagged_t structure. */
|
|
xRegIdx++;
|
|
pxHeapRegion = &( pxHeapRegions[ xRegIdx ] );
|
|
continue;
|
|
}
|
|
|
|
configASSERT(pxHeapRegion->xTag < HEAPREGIONS_MAX_TAGCOUNT);
|
|
configASSERT(pxHeapRegion->xSizeInBytes < HEAPREGIONS_MAX_REGIONSIZE);
|
|
xTotalRegionSize = pxHeapRegion->xSizeInBytes;
|
|
|
|
/* Ensure the heap region starts on a correctly aligned boundary. */
|
|
ulAddress = ( uint32_t ) pxHeapRegion->pucStartAddress;
|
|
if( ( ulAddress & portBYTE_ALIGNMENT_MASK ) != 0 )
|
|
{
|
|
ulAddress += ( portBYTE_ALIGNMENT - 1 );
|
|
ulAddress &= ~portBYTE_ALIGNMENT_MASK;
|
|
|
|
/* Adjust the size for the bytes lost to alignment. */
|
|
xTotalRegionSize -= ulAddress - ( uint32_t ) pxHeapRegion->pucStartAddress;
|
|
}
|
|
|
|
pucAlignedHeap = ( uint8_t * ) ulAddress;
|
|
|
|
/* Set xStart if it has not already been set. */
|
|
if( xDefinedRegions == 0 )
|
|
{
|
|
/* xStart is used to hold a pointer to the first item in the list of
|
|
free blocks. The void cast is used to prevent compiler warnings. */
|
|
xStart.pxNextFreeBlock = ( BlockLink_t * ) (pucAlignedHeap + BLOCK_HEAD_LEN);
|
|
xStart.xBlockSize = ( size_t ) 0;
|
|
}
|
|
else
|
|
{
|
|
/* Should only get here if one region has already been added to the
|
|
heap. */
|
|
configASSERT( pxEnd != NULL );
|
|
|
|
/* Check blocks are passed in with increasing start addresses. */
|
|
configASSERT( ulAddress > ( uint32_t ) pxEnd );
|
|
}
|
|
|
|
/* Remember the location of the end marker in the previous region, if
|
|
any. */
|
|
pxPreviousFreeBlock = pxEnd;
|
|
|
|
/* pxEnd is used to mark the end of the list of free blocks and is
|
|
inserted at the end of the region space. */
|
|
ulAddress = ( ( uint32_t ) pucAlignedHeap ) + xTotalRegionSize;
|
|
ulAddress -= uxHeapStructSize;
|
|
ulAddress &= ~portBYTE_ALIGNMENT_MASK;
|
|
pxEnd = ( BlockLink_t * ) (ulAddress + BLOCK_HEAD_LEN);
|
|
pxEnd->xBlockSize = 0;
|
|
pxEnd->pxNextFreeBlock = NULL;
|
|
pxEnd->xTag = -1;
|
|
|
|
/* To start with there is a single free block in this region that is
|
|
sized to take up the entire heap region minus the space taken by the
|
|
free block structure. */
|
|
pxFirstFreeBlockInRegion = ( BlockLink_t * ) (pucAlignedHeap + BLOCK_HEAD_LEN);
|
|
pxFirstFreeBlockInRegion->xBlockSize = ulAddress - ( uint32_t ) pxFirstFreeBlockInRegion + BLOCK_HEAD_LEN;
|
|
pxFirstFreeBlockInRegion->pxNextFreeBlock = pxEnd;
|
|
pxFirstFreeBlockInRegion->xTag=pxHeapRegion->xTag;
|
|
|
|
/* If this is not the first region that makes up the entire heap space
|
|
then link the previous region to this region. */
|
|
if( pxPreviousFreeBlock != NULL )
|
|
{
|
|
pxPreviousFreeBlock->pxNextFreeBlock = pxFirstFreeBlockInRegion;
|
|
}
|
|
|
|
xTotalHeapSize += pxFirstFreeBlockInRegion->xBlockSize;
|
|
xMinimumEverFreeBytesRemaining[ pxHeapRegion->xTag ] += pxFirstFreeBlockInRegion->xBlockSize;
|
|
xFreeBytesRemaining[ pxHeapRegion->xTag ] += pxFirstFreeBlockInRegion->xBlockSize;
|
|
|
|
/* Move onto the next HeapRegionTagged_t structure. */
|
|
xDefinedRegions++;
|
|
xRegIdx++;
|
|
pxHeapRegion = &( pxHeapRegions[ xRegIdx ] );
|
|
|
|
#if (configENABLE_MEMORY_DEBUG == 1)
|
|
{
|
|
mem_init_dog(pxFirstFreeBlockInRegion);
|
|
mem_init_dog(pxEnd);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* Check something was actually defined before it is accessed. */
|
|
configASSERT( xTotalHeapSize );
|
|
|
|
|
|
#if (configENABLE_MEMORY_DEBUG == 1)
|
|
{
|
|
mem_debug_init(uxHeapStructSize, &xStart, pxEnd, &xMallocMutex);
|
|
mem_check_all(0);
|
|
}
|
|
#endif
|
|
}
|
|
|