forked from Imagelibrary/rtems
56e8ee4ebd
* shared/m68kbspgetworkarea.c: Fix extern type to RamSize. * shared/m68kpretaskinghook.c: Do not handle the RAM allocation if the BSP is handling it. * acinclude.m4: Add the mcf52235 BSP.
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/*
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* This routine is an implementation of the bsp_pretasking_hook
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* that can be used by all m68k BSPs following linkcmds conventions
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* regarding heap, stack, and workspace allocation.
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*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*/
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#include <bsp.h>
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#include <rtems/libio.h>
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#include <rtems/libcsupport.h>
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/*
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* Function: bsp_pretasking_hook
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* Created: 95/03/10
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*
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* Description:
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* BSP pretasking hook. Called just before drivers are initialized.
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* Used to setup libc and install any BSP extensions.
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*
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* NOTES:
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* Must not use libc (to do io) from here, since drivers are
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* not yet initialized.
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*
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*/
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#if !defined(BSP_BOOTCARD_HANDLES_RAM_ALLOCATION)
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extern void bsp_libc_init( void *, unsigned long, int );
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extern char _RamBase[];
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extern char _WorkspaceBase[];
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extern char _HeapSize[];
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unsigned long _M68k_Ramsize;
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#endif
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void bsp_pretasking_hook(void)
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{
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#if !defined(BSP_BOOTCARD_HANDLES_RAM_ALLOCATION)
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void *heapStart;
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unsigned long heapSize = (unsigned long)_HeapSize;
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unsigned long ramSpace;
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heapStart = (void *)
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((unsigned long)_WorkspaceBase + rtems_configuration_get_work_space_size());
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ramSpace = (unsigned long)_RamBase + _M68k_Ramsize - (unsigned long)heapStart;
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/*
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* Can't use 'if(heapSize==0)' because the compiler "knows" that nothing
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* can have an address of 0 and proceeds to optimize-away the test.
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*/
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if (heapSize < 10)
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heapSize = ramSpace;
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else if (heapSize > ramSpace)
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rtems_fatal_error_occurred (('H'<<24) | ('E'<<16) | ('A'<<8) | 'P');
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bsp_libc_init(heapStart, heapSize, 0);
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#endif
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}
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