1 | /* |
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2 | * This routine is an implementation of the bsp_pretasking_hook |
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3 | * that can be used by all m68k BSPs following linkcmds conventions |
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4 | * regarding heap, stack, and workspace allocation. |
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5 | * |
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6 | * COPYRIGHT (c) 1989-1999. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.OARcorp.com/rtems/license.html. |
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12 | * |
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13 | * $Id$ |
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14 | */ |
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15 | |
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16 | #include <bsp.h> |
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17 | #include <rtems/libio.h> |
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18 | #include <rtems/libcsupport.h> |
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19 | |
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20 | /* |
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21 | * Function: bsp_pretasking_hook |
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22 | * Created: 95/03/10 |
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23 | * |
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24 | * Description: |
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25 | * BSP pretasking hook. Called just before drivers are initialized. |
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26 | * Used to setup libc and install any BSP extensions. |
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27 | * |
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28 | * NOTES: |
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29 | * Must not use libc (to do io) from here, since drivers are |
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30 | * not yet initialized. |
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31 | * |
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32 | */ |
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33 | |
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34 | extern void bsp_libc_init( void *, unsigned long, int ); |
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35 | extern rtems_configuration_table BSP_Configuration; |
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36 | |
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37 | extern void *_RamBase; |
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38 | extern void *_WorkspaceBase; |
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39 | extern void *_HeapSize; |
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40 | |
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41 | |
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42 | unsigned long _M68k_Ramsize; |
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43 | |
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44 | void bsp_pretasking_hook(void) |
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45 | { |
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46 | void *heapStart; |
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47 | unsigned long heapSize = (unsigned long)&_HeapSize; |
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48 | unsigned long ramSpace; |
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49 | |
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50 | heapStart = (void *) |
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51 | ((unsigned long)&_WorkspaceBase + BSP_Configuration.work_space_size); |
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52 | ramSpace = (unsigned long) &_RamBase + _M68k_Ramsize - (unsigned long) heapStart; |
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53 | |
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54 | if (heapSize == 0) |
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55 | heapSize = ramSpace; |
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56 | else if (heapSize > ramSpace) |
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57 | rtems_fatal_error_occurred (('H'<<24) | ('E'<<16) | ('A'<<8) | 'P'); |
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58 | |
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59 | bsp_libc_init(heapStart, heapSize, 0); |
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60 | |
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61 | #ifdef RTEMS_DEBUG |
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62 | rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); |
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63 | #endif |
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64 | |
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65 | } |
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