blob: 0b015c694f47e1a55c53c6874dbc71ed47fe51c7 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/*
* 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.
*
* $Id$
*/
#include <bsp.h>
#include <bsp/bootcard.h>
#include <stdint.h>
extern void *__rtems_end;
extern uint32_t _bsp_sbrk_init(uint32_t, uint32_t*);
/*
* 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,
size_t *work_area_size,
void **heap_start,
size_t *heap_size
)
{
uintptr_t size;
uintptr_t reserve;
uintptr_t spared;
reserve = rtems_configuration_get_interrupt_stack_size();
size = (uintptr_t)BSP_mem_size - (uintptr_t)&__rtems_end - reserve;
*work_area_start = (void *)((uintptr_t) &__rtems_end + reserve);
*work_area_size = size;
spared = _bsp_sbrk_init( *work_area_start, work_area_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.
*/
#if 0
printk( "Work Area Base %d %x\n", *work_area_start, *work_area_start );
printk( "Work Area Size %d %x\n", *work_area_size, *work_area_size );
printk( "Work Area End %d %x\n",
*work_area_start + size, *work_area_start + size );
#endif
}
|