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/**
* @file
*
* Board-specific initialization code. Called from the generic boot_card()
* function defined in rtems/c/src/lib/libbsp/shared/main.c. That function
* does some of the board independent initialization. It is called from the
* generic MC680x0 entry point _start() defined in
* rtems/c/src/lib/start/m68k/start.s
*
* _start() has set up a stack, has zeroed the .bss section, has turned off
* interrupts, and placed the processor in the supervisor mode. boot_card()
* has left the processor in that state when bsp_start() was called.
*
* RUNS WITH ADDRESS TRANSLATION AND CACHING TURNED OFF!
* ASSUMES THAT THE VIRTUAL ADDRESSES WILL BE IDENTICAL TO THE PHYSICAL
* ADDRESSES. Software-controlled address translation would be required
* otherwise.
*
* ASSUMES THAT 167BUG IS PRESENT TO CATCH ANY EXCEPTIONS DURING
* INITIALIZATION.
*/
/*
* COPYRIGHT (c) 1989-2012.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*
* Modifications of respective RTEMS files:
* Copyright (c) 1998, National Research Council of Canada
*/
#include <bsp.h>
#include <bsp/bootcard.h>
#include <page_table.h>
void M68KFPSPInstallExceptionHandlers (void);
void bsp_start( void )
{
void **rom_monitor_vector_table;
int index;
/*
* 167Bug Vectors are at 0xFFE00000
*/
rom_monitor_vector_table = (void **)0xFFE00000;
m68k_set_vbr( rom_monitor_vector_table );
/*
* Copy 167Bug Bus Error handler into our exception vector. All 167Bug
* exception vectors are the same and point to the generalized exception
* handler. The bus error handler is the one that Motorola says to copy
* (p. 2-13, Debugging Package for Motorola 68K CISC CPUs User's Manual
* 68KBUG/D1A3, October 1993).
*/
for ( index=2 ; index<=255 ; index++ )
M68Kvec[ index ] = rom_monitor_vector_table[ 2 ];
/* Any exceptions during initialization should be trapped by 167Bug */
m68k_set_vbr( &M68Kvec );
/* Install the 68040 FPSP here */
M68KFPSPInstallExceptionHandlers();
/*
* You may wish to make the VME arbitration round-robin here, currently
* we leave it as it is.
*/
/* Set the Interrupt Base Vectors */
lcsr->vector_base = (VBR0 << 28) | (VBR1 << 24);
/*
* Initialize address translation
*/
page_table_init();
}
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