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/*
* This routine starts the application. It includes application,
* board, and monitor specific initialization and configuration.
* The generic CPU dependent initialization has been performed
* before this routine is invoked.
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <bsp.h>
#include <rtems/libio.h>
#include <libcsupport.h>
#include <zilog/z8036.h>
#include <string.h>
/*
* The original table from the application and our copy of it with
* some changes.
*/
extern rtems_configuration_table Configuration;
rtems_configuration_table BSP_Configuration;
rtems_cpu_table Cpu_table;
char *rtems_progname;
/*
* Use the shared implementations of the following routines
*/
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, unsigned32, int );
/*
* Function: bsp_pretasking_hook
* Created: 95/03/10
*
* Description:
* BSP pretasking hook. Called just before drivers are initialized.
* Used to setup libc and install any BSP extensions.
*
* NOTES:
* Must not use libc (to do io) from here, since drivers are
* not yet initialized.
*
*/
void bsp_pretasking_hook(void)
{
rtems_unsigned32 heap_start;
#if 0
extern int end;
heap_start = (rtems_unsigned32) &end;
#else
void * sbrk( int );
heap_start = (rtems_unsigned32) sbrk( 64 * 1024 + CPU_ALIGNMENT );
#endif
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
bsp_libc_init((void *) heap_start, 64 * 1024, 0);
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
/*
* main/bsp_start
*
* This routine does the bulk of the system initialization.
*/
/* This is the original command line passed from DOS */
char ** Go32_Argv;
int main(
int argc,
char **argv,
char **environp
)
{
extern void * sbrk( int );
extern volatile void _exit( int );
/* Set up arguments that we can access later */
Go32_Argv = argv;
if ((argc > 0) && argv && argv[0])
rtems_progname = argv[0];
else
rtems_progname = "RTEMS";
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.predriver_hook = NULL;
Cpu_table.postdriver_hook = bsp_postdriver_hook;
Cpu_table.idle_task = NULL; /* do not override system IDLE task */
Cpu_table.do_zero_of_workspace = TRUE;
Cpu_table.interrupt_table_segment = 0;/* get_ds(); */
Cpu_table.interrupt_table_offset = (void *)0;
Cpu_table.interrupt_stack_size = 4096;
Cpu_table.extra_mpci_receive_server_stack = 0;
/*
* Copy the table
*/
BSP_Configuration = Configuration;
BSP_Configuration.work_space_start = sbrk( Configuration.work_space_size );
if ( BSP_Configuration.work_space_start == 0 ) {
/* Big trouble */
int write( int, void *, int );
char msg[] = "bsp_start() couldn't sbrk() RTEMS work space\n";
write( 2, msg, sizeof msg - 1 );
_exit( 1 );
}
/*
* Tell libio how many fd's we want and allow it to tweak config
*/
rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
/* does not return */
/* We only return here if the executive has finished. This happens */
/* when the task has called exit(). */
/* At this point we call _exit() which resides in djgcc. */
for (;;)
_exit( 0 );
/* no cleanup necessary for GO32 */
return 0;
}
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