/* 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) 1989-1997.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may 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 <string.h>
#include <fcntl.h>
#ifdef STACK_CHECKER_ON
#include <stackchk.h>
#endif
#ifndef lint
static char _sccsid[] = "@(#)bspstart.c 09/11/96 1.15\n";
#endif
/*
* 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;
/* Initialize whatever libc we are using
* called from postdriver hook
*/
#define HEAP_BLOCK_SIZE (16 * 1024)
rtems_unsigned32 heap_size = 0;
rtems_unsigned32 heap_start;
void bsp_libc_init()
{
heap_size = 2 * 1024 * 1024; /* allocate a maximum of 2 megabytes for the heap */
/* allocate all remaining memory to the heap */
do {
heap_size -= HEAP_BLOCK_SIZE;
heap_start = _sysalloc( heap_size );
} while ( !heap_start );
if (!heap_start)
rtems_fatal_error_occurred( heap_size );
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, heap_size, 0);
/*
* Init the RTEMS libio facility to provide UNIX-like system
* calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
* Uses malloc() to get area for the iops, so must be after malloc init
*/
rtems_libio_init();
/*
* 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 */
}
/*
* 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)
{
bsp_libc_init();
#ifdef STACK_CHECKER_ON
/*
* Initialize the stack bounds checker
* We can either turn it on here or from the app.
*/
Stack_check_Initialize();
#endif
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
/*
* After drivers are setup, register some "filenames"
* and open stdin, stdout, stderr files
*
* Newlib will automatically associate the files with these
* (it hardcodes the numbers)
*/
void
bsp_postdriver_hook(void)
{
int stdin_fd, stdout_fd, stderr_fd;
int error_code;
error_code = 'S' << 24 | 'T' << 16;
if ((stdin_fd = __rtems_open("/dev/console", O_RDONLY, 0)) == -1)
rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' );
if ((stdout_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
rtems_fatal_error_occurred( error_code | 'D' << 8 | '1' );
if ((stderr_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
rtems_fatal_error_occurred( error_code | 'D' << 8 | '2' );
if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2))
rtems_fatal_error_occurred( error_code | 'I' << 8 | 'O' );
printf("allocated %d heap size, %d work space size\n",
heap_size, BSP_Configuration.work_space_size);
printf(" work space start 0x%x\n",(unsigned int)BSP_Configuration.work_space_start);
}
int bsp_start(
int argc,
char **argv,
char **environp
)
{
if ((argc > 0) && argv && argv[0])
rtems_progname = argv[0];
else
rtems_progname = "RTEMS";
/* set the PIA0 register wait states */
*(volatile unsigned32 *)0x80000020 = 0x04080000;
/*
* 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.RTEMS_api_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
#ifdef STACK_CHECKER_ON
/*
* Add 1 extension for stack checker
*/
BSP_Configuration.maximum_extensions++;
#endif
/*
* Tell libio how many fd's we want and allow it to tweak config
*/
rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
/*
* 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 = _sysalloc( BSP_Configuration.work_space_size + 512 );
if (!BSP_Configuration.work_space_start)
rtems_fatal_error_occurred( BSP_Configuration.work_space_size );
BSP_Configuration.work_space_start = (void *) ((unsigned int)((char *)BSP_Configuration.work_space_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1));
/*
* initialize the CPU table for this BSP
*/
/*
* we do not use the pretasking_hook
*/
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_stack_size = 4096;
Cpu_table.extra_system_initialization_stack = 0;
/*
* Don't forget the other CPU Table entries.
*/
_settrap( 109,&a29k_enable_sup);
_settrap( 110,&a29k_disable_sup);
_settrap( 111,&a29k_enable_all_sup);
_settrap( 112,&a29k_disable_all_sup);
_settrap( 106,&a29k_context_switch_sup);
_settrap( 107,&a29k_context_restore_sup);
_settrap( 108,&a29k_context_save_sup);
_settrap( 105,&a29k_sigdfl_sup);
/*
* Start RTEMS
*/
rtems_initialize_executive( &BSP_Configuration, &Cpu_table );
bsp_cleanup();
return 0;
}
