4.104.115
Last change
on this file since 7a2125c was
7a2125c,
checked in by Joel Sherrill <joel.sherrill@…>, on 09/19/08 at 20:41:36
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2008-09-19 Joel Sherrill <joel.sherrill@…>
- shared/start/start.S, shared/startup/bspgetworkarea.c,
shared/startup/bspstart.c, shared/startup/linkcmds: Modifications
which reflect those tested on psim. Hopefully they work on all
boards. The initialization stack is explicitly declared in the
linkcmds memory layout rather than magic math.
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-
Property mode set to
100644
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File size:
1.4 KB
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1 | /* |
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2 | * The license and distribution terms for this file may be |
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3 | * found in the file LICENSE in this distribution or at |
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4 | * http://www.rtems.com/license/LICENSE. |
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5 | * |
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6 | * $Id$ |
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7 | */ |
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8 | |
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9 | #include <bsp.h> |
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10 | #include <bsp/bootcard.h> |
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11 | #include <stdint.h> |
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12 | |
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13 | extern void *__rtems_end; |
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14 | extern uint32_t _bsp_sbrk_init(uint32_t, uint32_t*); |
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15 | |
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16 | /* |
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17 | * This method returns the base address and size of the area which |
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18 | * is to be allocated between the RTEMS Workspace and the C Program |
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19 | * Heap. |
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20 | */ |
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21 | void bsp_get_work_area( |
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22 | void **work_area_start, |
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23 | size_t *work_area_size, |
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24 | void **heap_start, |
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25 | size_t *heap_size |
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26 | ) |
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27 | { |
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28 | uintptr_t size; |
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29 | uintptr_t reserve; |
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30 | uintptr_t spared; |
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31 | |
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32 | reserve = rtems_configuration_get_interrupt_stack_size(); |
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33 | size = (uintptr_t)BSP_mem_size - (uintptr_t)&__rtems_end - reserve; |
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34 | |
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35 | *work_area_start = (void *)((uintptr_t) &__rtems_end + reserve); |
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36 | *work_area_size = size; |
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37 | spared = _bsp_sbrk_init( *work_area_start, work_area_size ); |
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38 | *heap_start = BSP_BOOTCARD_HEAP_USES_WORK_AREA; |
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39 | *heap_size = BSP_BOOTCARD_HEAP_SIZE_DEFAULT; |
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40 | |
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41 | /* |
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42 | * The following may be helpful in debugging what goes wrong when |
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43 | * you are allocating the Work Area in a new BSP. |
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44 | */ |
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45 | #if 0 |
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46 | printk( "Work Area Base %d %x\n", *work_area_start, *work_area_start ); |
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47 | printk( "Work Area Size %d %x\n", *work_area_size, *work_area_size ); |
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48 | printk( "Work Area End %d %x\n", |
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49 | *work_area_start + size, *work_area_start + size ); |
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50 | #endif |
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51 | } |
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52 | |
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