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/**
* @file
*
* @ingroup ClassicCache
*/
/*
* Copyright (c) 2014 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems.h>
#include <rtems/malloc.h>
#include <rtems/score/apimutex.h>
#include <rtems/score/heapimpl.h>
#include <rtems/score/sysstate.h>
static Heap_Control cache_coherent_heap_instance;
static Heap_Control *cache_coherent_heap;
void *rtems_cache_coherent_allocate(
size_t size,
uintptr_t alignment,
uintptr_t boundary
)
{
void *ptr;
Heap_Control *heap;
_RTEMS_Lock_allocator();
heap = cache_coherent_heap;
if ( heap == NULL ) {
heap = RTEMS_Malloc_Heap;
}
ptr = _Heap_Allocate_aligned_with_boundary(
heap,
size,
alignment,
boundary
);
_RTEMS_Unlock_allocator();
return ptr;
}
void rtems_cache_coherent_free( void *ptr )
{
Heap_Control *heap;
_RTEMS_Lock_allocator();
heap = cache_coherent_heap;
if ( heap != NULL ) {
if ( _Heap_Free( heap, ptr ) ) {
heap = NULL;
} else {
heap = RTEMS_Malloc_Heap;
}
} else {
heap = RTEMS_Malloc_Heap;
}
if ( heap != NULL ) {
_Heap_Free( heap, ptr );
}
_RTEMS_Unlock_allocator();
}
static void add_area(
void *area_begin,
uintptr_t area_size
)
{
Heap_Control *heap = cache_coherent_heap;
if ( heap == NULL ) {
bool ok;
heap = &cache_coherent_heap_instance;
ok = _Heap_Initialize( heap, area_begin, area_size, 0 );
if ( ok ) {
cache_coherent_heap = heap;
}
} else {
_Heap_Extend( heap, area_begin, area_size, 0 );
}
}
void rtems_cache_coherent_add_area(
void *area_begin,
uintptr_t area_size
)
{
if ( _System_state_Is_up( _System_state_Get()) ) {
_RTEMS_Lock_allocator();
add_area( area_begin, area_size );
_RTEMS_Unlock_allocator();
} else {
add_area( area_begin, area_size );
}
}
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