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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.org/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;
/*
* 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_work_area_initialize(void)
{
/* must be identical to STACK_SIZE in start.S */
#define STACK_SIZE (16 * 1024)
/* Early dynamic memory allocator is placed just above _end */
void *work_area_start = (void *)&end;
uintptr_t work_area_size =
(uintptr_t)rdb_start - (uintptr_t)&end - STACK_SIZE;
/*
* 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"
"current stack pointer = 0x%p%s\n",
work_area_start,
work_area_size, /* decimal */
work_area_size, /* hexadecimal */
end,
sp,
((sp >= *work_area_start && sp <= end) ? " OVERLAPS!" : "")
);
printk( "rdb_start = 0x%08x\n", rdb_start );
}
#endif
bsp_work_area_initialize_default(work_area_start, work_area_size);
}
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