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/*
* 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.
*
* $Id$
*/
/* #define BSP_GET_WORK_AREA_DEBUG */
#include <bsp.h>
#include <bsp/bootcard.h>
#include <stdint.h>
#ifdef BSP_GET_WORK_AREA_DEBUG
#include <rtems/bspIo.h>
#endif
extern void *__rtems_end;
/*
* This method returns the base address and size of the area which
* is to be allocated between the RTEMS Workspace and the C Program
* Heap.
*/
void bsp_get_work_area(
void **work_area_start,
uintptr_t *work_area_size,
void **heap_start,
uintptr_t *heap_size
)
{
uintptr_t work_size;
uintptr_t work_area;
work_area = (uintptr_t)&__rtems_end +
rtems_configuration_get_interrupt_stack_size();
work_size = (uintptr_t)BSP_mem_size - work_area;
*work_area_start = (void *)work_area,
*work_area_size = work_size;
*heap_start = BSP_BOOTCARD_HEAP_USES_WORK_AREA;
*heap_size = BSP_BOOTCARD_HEAP_SIZE_DEFAULT;
/*
* The following may be helpful in debugging what goes wrong when
* you are allocating the Work Area in a new BSP.
*/
#ifdef BSP_GET_WORK_AREA_DEBUG
{
void *sp = __builtin_frame_address(0);
void *end = *work_area_start + *work_area_size;
printk(
"work_area_start = 0x%p\n"
"work_area_size = %d 0x%08x\n"
"end = 0x%p\n"
"heap_start = 0x%p\n"
"heap_size = %d\n"
"current stack pointer = 0x%p%s\n",
*work_area_start,
*work_area_size, /* decimal */
*work_area_size, /* hexadecimal */
end,
*heap_start,
*heap_size,
sp,
((sp >= *work_area_start && sp <= end) ? " OVERLAPS!" : "")
);
}
#endif
}
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