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/* bsp_start()
*
* 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.
*
* INPUT: NONE
*
* OUTPUT: NONE
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
* On-Line Applications Research Corporation (OAR).
* All rights assigned to U.S. Government, 1994.
*
* This material may be reproduced by or for the U.S. Government pursuant
* to the copyright license under the clause at DFARS 252.227-7013. This
* notice must appear in all copies of this file and its derivatives.
*
* $Id$
*/
#include <rtems.h>
#include <bsp.h>
#include <shm.h>
#include <libcsupport.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;
/* Initialize whatever libc we are using
* called from postdriver hook
*/
void bsp_libc_init()
{
extern int end;
rtems_unsigned32 heap_start;
heap_start = (rtems_unsigned32) &end;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
/*
* The last parameter to RTEMS_Malloc_Initialize is the "chunk"
* size which a multiple of will be requested on each sbrk()
* call by malloc(). A value of 0 indicates that sbrk() should
* not be called to extend the heap.
*/
RTEMS_Malloc_Initialize((void *) heap_start, 64 * 1024, 0);
/*
* Set up for the libc handling.
*/
if (BSP_Configuration.ticks_per_timeslice > 0)
libc_init(1); /* reentrant if possible */
else
libc_init(0); /* non-reentrant */
/*
* Initialize the stack bounds checker
*/
#ifdef STACK_CHECKER_ON
Stack_check_Initialize();
#endif
}
int bsp_start(
int argc,
char **argv,
char **environp
)
{
/*
* Allocate the memory for the RTEMS Work Space. This can come from
* a variety of places: hard coded address, malloc'ed from outside
* RTEMS world (e.g. simulator or primitive memory manager), or (as
* typically done by stock BSPs) by subtracting the required amount
* of work space from the last physical address on the CPU board.
*/
/*
* Copy the Configuration Table .. so we can change it
*/
BSP_Configuration = Configuration;
/*
* Add 1 region for the RTEMS Malloc
*/
BSP_Configuration.maximum_regions++;
/*
* Add 1 extension for newlib libc
*/
#ifdef RTEMS_NEWLIB
BSP_Configuration.maximum_extensions++;
#endif
/*
* Add 1 extension for newlib libc
*/
#ifdef RTEMS_NEWLIB
BSP_Configuration.maximum_extensions++;
#endif
/*
* Need to "allocate" the memory for the RTEMS Workspace and
* tell the RTEMS configuration where it is. This memory is
* not malloc'ed. It is just "pulled from the air".
*/
BSP_Configuration.work_space_start = (void *) 0;
/*
* initialize the CPU table for this BSP
*/
/*
* we do not use the pretasking_hook
*/
Cpu_table.pretasking_hook = NULL;
Cpu_table.predriver_hook = bsp_libc_init; /* RTEMS resources available */
Cpu_table.postdriver_hook = NULL;
Cpu_table.idle_task = NULL; /* do not override system IDLE task */
Cpu_table.do_zero_of_workspace = TRUE;
Cpu_table.interrupt_stack_size = 4096;
Cpu_table.extra_system_initialization_stack = 0;
/*
* Don't forget the other CPU Table entries.
*/
/*
* Start RTEMS
*/
rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
bsp_cleanup();
return 0;
}
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