forked from Imagelibrary/rtems
f50952c9d3
feedback from Eric Norum <eric@skatter.usask.ca> on static and dynamic RAM sizing issues while still having as much shared code as possible across the m68k BSPs.
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/*
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* This routine starts the application. It includes application,
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* board, and monitor specific initialization and configuration.
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* The generic CPU dependent initialization has been performed
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* before this routine is invoked.
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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.OARcorp.com/rtems/license.html.
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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 <libcsupport.h>
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#include <zilog/z8036.h>
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#include <string.h>
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/*
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* The original table from the application and our copy of it with
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* some changes.
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*/
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extern rtems_configuration_table Configuration;
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rtems_configuration_table BSP_Configuration;
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rtems_cpu_table Cpu_table;
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char *rtems_progname;
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/* Amount of RAM on this board */
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unsigned long _M68k_Ramsize;
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/*
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* Use the shared implementations of the following routines
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*/
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void bsp_postdriver_hook(void);
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void bsp_libc_init( void *, unsigned32, int );
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void bsp_pretasking_hook(void); /* m68k version */
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/*
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* bsp_start
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*
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* This routine does the bulk of the system initialization.
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*/
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void bsp_start( void )
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{
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m68k_isr_entry *monitors_vector_table;
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int index;
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extern void *_WorkspaceBase;
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extern unsigned long _M68k_Ramsize;
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_M68k_Ramsize = (unsigned long)&_RamSize; /* RAM size set in linker script */
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monitors_vector_table = (m68k_isr_entry *)0; /* 135Bug Vectors are at 0 */
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m68k_set_vbr( monitors_vector_table );
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for ( index=2 ; index<=255 ; index++ )
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M68Kvec[ index ] = monitors_vector_table[ 32 ];
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M68Kvec[ 2 ] = monitors_vector_table[ 2 ]; /* bus error vector */
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M68Kvec[ 4 ] = monitors_vector_table[ 4 ]; /* breakpoints vector */
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M68Kvec[ 9 ] = monitors_vector_table[ 9 ]; /* trace vector */
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M68Kvec[ 47 ] = monitors_vector_table[ 47 ]; /* system call vector */
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m68k_set_vbr( &M68Kvec );
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(*(rtems_unsigned8 *)0xfffb0067) = 0x7f; /* make VME access round-robin */
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m68k_enable_caching();
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/*
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* we only use a hook to get the C library initialized.
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*/
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Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
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Cpu_table.postdriver_hook = bsp_postdriver_hook;
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Cpu_table.interrupt_vector_table = (m68k_isr_entry *) &M68Kvec;
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Cpu_table.interrupt_stack_size = 4096;
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BSP_Configuration.work_space_start = (void *) &_WorkspaceBase;
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}
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