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/**
* @file
*
* @brief Workspace Handler Support
* @ingroup ScoreWorkspace
*/
/*
* COPYRIGHT (c) 1989-2009.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/wkspace.h>
#include <rtems/score/heapimpl.h>
#include <rtems/score/interr.h>
#include <rtems/config.h>
#include <string.h> /* for memset */
/* #define DEBUG_WORKSPACE */
#if defined(DEBUG_WORKSPACE)
#include <rtems/bspIo.h>
#endif
void _Workspace_Handler_initialization(
Heap_Area *areas,
size_t area_count,
Heap_Initialization_or_extend_handler extend
)
{
Heap_Initialization_or_extend_handler init_or_extend = _Heap_Initialize;
uintptr_t remaining = rtems_configuration_get_work_space_size();
bool do_zero = rtems_configuration_get_do_zero_of_workspace();
bool unified = rtems_configuration_get_unified_work_area();
uintptr_t page_size = CPU_HEAP_ALIGNMENT;
uintptr_t overhead = _Heap_Area_overhead( page_size );
size_t i;
for (i = 0; i < area_count; ++i) {
Heap_Area *area = &areas [i];
if ( do_zero ) {
memset( area->begin, 0, area->size );
}
if ( area->size > overhead ) {
uintptr_t space_available;
uintptr_t size;
if ( unified ) {
size = area->size;
} else {
if ( remaining > 0 ) {
size = remaining < area->size - overhead ?
remaining + overhead : area->size;
} else {
size = 0;
}
}
space_available = (*init_or_extend)(
&_Workspace_Area,
area->begin,
size,
page_size
);
area->begin = (char *) area->begin + size;
area->size -= size;
if ( space_available < remaining ) {
remaining -= space_available;
} else {
remaining = 0;
}
init_or_extend = extend;
}
}
if ( remaining > 0 ) {
_Internal_error_Occurred(
INTERNAL_ERROR_CORE,
true,
INTERNAL_ERROR_TOO_LITTLE_WORKSPACE
);
}
}
void *_Workspace_Allocate(
size_t size
)
{
void *memory;
memory = _Heap_Allocate( &_Workspace_Area, size );
#if defined(DEBUG_WORKSPACE)
printk(
"Workspace_Allocate(%d) from %p/%p -> %p\n",
size,
__builtin_return_address( 0 ),
__builtin_return_address( 1 ),
memory
);
#endif
return memory;
}
void *_Workspace_Allocate_aligned( size_t size, size_t alignment )
{
return _Heap_Allocate_aligned( &_Workspace_Area, size, alignment );
}
/*
* _Workspace_Free
*/
void _Workspace_Free(
void *block
)
{
#if defined(DEBUG_WORKSPACE)
printk(
"Workspace_Free(%p) from %p/%p\n",
block,
__builtin_return_address( 0 ),
__builtin_return_address( 1 )
);
#endif
_Heap_Free( &_Workspace_Area, block );
}
void *_Workspace_Allocate_or_fatal_error(
size_t size
)
{
void *memory;
memory = _Heap_Allocate( &_Workspace_Area, size );
#if defined(DEBUG_WORKSPACE)
printk(
"Workspace_Allocate_or_fatal_error(%d) from %p/%p -> %p\n",
size,
__builtin_return_address( 0 ),
__builtin_return_address( 1 ),
memory
);
#endif
if ( memory == NULL )
_Internal_error_Occurred(
INTERNAL_ERROR_CORE,
true,
INTERNAL_ERROR_WORKSPACE_ALLOCATION
);
return memory;
}
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