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/*
* This set of routines are the BSP specific initialization
* support routines.
*
* COPYRIGHT (c) 1989-2008.
* 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.
*/
/* #define BSP_GET_WORK_AREA_DEBUG */
#include <bsp.h>
#include <bsp/bootcard.h>
#ifdef BSP_GET_WORK_AREA_DEBUG
#include <rtems/bspIo.h>
#endif
/* Tells us where to put the workspace in case remote debugger is present. */
extern uint32_t rdb_start;
/* Must be aligned to 8, _end is aligned to 8 */
unsigned int early_mem = (unsigned int)&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
)
{
/* must be identical to STACK_SIZE in start.S */
#define STACK_SIZE (16 * 1024)
/* Early dynamic memory allocator is placed just above _end */
*work_area_start = (void *)early_mem;
*work_area_size = (void *)rdb_start - (void *)early_mem - STACK_SIZE;
early_mem = ~0; /* Signal bsp_early_malloc not to be used anymore */
*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!" : "")
);
printk( "rdb_start = 0x%08x\n", rdb_start );
}
#endif
}
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