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/*
* This routine is an implementation of the bsp_get_work_area()
* that can be used by all BSPs following linkcmds conventions
* regarding heap, stack, and workspace allocation.
*
* 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.
*/
#include <bsp.h>
#include <bsp/bootcard.h>
#ifdef BSP_GET_WORK_AREA_DEBUG
#include <rtems/bspIo.h>
#endif
/*
* These are provided by the linkcmds for ALL of the BSPs which use this file.
*/
extern char WorkAreaBase[];
extern char HeapSize[];
extern char HeapBase[];
/*
* We may get the size information from U-Boot or the linker scripts.
*/
#ifdef HAS_UBOOT
extern bd_t bsp_uboot_board_info;
#else
extern char RamBase[];
extern char RamSize[];
#endif /* HAS_UBOOT */
/*
* 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 ram_end;
#ifdef HAS_UBOOT
ram_end = (uintptr_t) bsp_uboot_board_info.bi_memstart +
bsp_uboot_board_info.bi_memsize;
#else
ram_end = (uintptr_t)RamBase + (uintptr_t)RamSize;
#endif
*work_area_start = WorkAreaBase;
*work_area_size = (uintptr_t) HeapSize;
*heap_start = (void*) HeapBase;
*heap_size = (uintptr_t) HeapSize;
/*
* 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(
"bsp_get_work_area\n\r"
"work_area_start = 0x%p\n\r"
"work_area_size = %d 0x%08x\n\r"
"end = 0x%p\n\r"
"heap_start = 0x%p\n\r"
"heap_size = %d\n\r"
"current stack pointer = 0x%p%s\n\r",
*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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