/* bspstart.c
*
* This set of routines starts the application. It includes application,
* board, and monitor specific initialization and configuration.
* The generic CPU dependent initialization has been performed
* before any of these are invoked.
*
* Called by RTEMS::RTEMS constructor in rtems-ctor.cc
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994, 1997.
* On-Line Applications Research Corporation (OAR).
* All rights assigned to U.S. Government, 1994.
*
* $Id$
*/
#include <bsp.h>
#include <rtems/libio.h>
#include <libcsupport.h>
#include <string.h>
#include <fcntl.h>
#ifdef STACK_CHECKER_ON
#include <stackchk.h>
#endif
/*
* 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;
rtems_unsigned32 bsp_isr_level;
/* PAGE
*
* bsp_libc_init
*
* Initialize whatever libc we are using called from bsp_postdriver_hook.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values: NONE
*
*/
void bsp_libc_init(void)
{
extern int end;
rtems_unsigned32 heap_start;
rtems_unsigned32 heap_size;
heap_start = (rtems_unsigned32) &end;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
heap_size = BSP_Configuration.work_space_start - (void *)&end;
heap_size &= 0xfffffff0; /* keep it as a multiple of 16 bytes */
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 */
}
/* PAGE
*
* bsp_pretasking_hook
*
* BSP pretasking hook. Called just before drivers are initialized.
* Used to setup libc and install any BSP extensions.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values: NONE
*
*/
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
}
/* PAGE
*
* bsp_predriver_hook
*
* Initialization before drivers are setup.
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values: NONE
*/
void bsp_predriver_hook(void)
{
initialize_external_exception_vector();
}
/* PAGE
*
* bsp_postdriver_hook
*
* 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)
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values: NONE
*
*/
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' );
}
/* PAGE
*
* bsp_start
*
* This routine does the bulk of the system initialization.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values: NONE
*
*/
void bsp_start( void )
{
unsigned char *work_space_start;
unsigned int msr_value = 0x2030;
/*
* Set BSP to initial value. Note: This value is a guess
* check how the real board comes up. This is critical to
* getting the source to work with the debugger.
*/
_CPU_MSR_SET( msr_value );
/*
* Set up our hooks
* Make sure libc_init is done before drivers initialized so that
* they can use atexit()
*/
Cpu_table.exceptions_in_RAM = TRUE;
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.predriver_hook = bsp_predriver_hook;
Cpu_table.postdriver_hook = bsp_postdriver_hook;
Cpu_table.idle_task = NULL; /* do not override system IDLE task */
Cpu_table.clicks_per_usec = 66 / 4; /* XXX get from linkcmds */
/*
* SIS does zero out memory BUT only when IT begins execution. Thus
* if we want to have a clean slate in the workspace each time we
* begin execution of OUR application, then we must zero the workspace.
*/
Cpu_table.do_zero_of_workspace = TRUE;
/*
* This should be enough interrupt stack.
*/
Cpu_table.interrupt_stack_size = (12 * 1024);
/*
* DMV170 does not support MP configurations so there is really no way
* to check this out.
*/
Cpu_table.extra_mpci_receive_server_stack = 0;
/*
* Copy the table and allocate memory for the RTEMS Workspace
*/
BSP_Configuration = Configuration;
#if defined(RTEMS_POSIX_API)
BSP_Configuration.work_space_size *= 3;
#endif
work_space_start =
(unsigned char *)&RAM_END - BSP_Configuration.work_space_size;
if ( work_space_start <= (unsigned char *)&end ) {
DEBUG_puts( "bspstart: Not enough RAM!!!\n" );
bsp_cleanup();
}
BSP_Configuration.work_space_start = work_space_start;
/*
* Add 1 region for RTEMS Malloc
*/
BSP_Configuration.RTEMS_api_configuration->maximum_regions++;
/*
* Account for the console's resources
*/
console_reserve_resources( &BSP_Configuration );
#ifdef RTEMS_NEWLIB
/*
* Add 1 extension for newlib libc
*/
BSP_Configuration.maximum_extensions++;
#endif
#ifdef STACK_CHECKER_ON
/*
* Add 1 extension for stack checker
*/
BSP_Configuration.maximum_extensions++;
#endif
/*
* Add 1 extension for MPCI_fatal
*/
if (BSP_Configuration.User_multiprocessing_table)
BSP_Configuration.maximum_extensions++;
/*
* Initialize RTEMS. main() will finish it up and start multitasking.
*/
rtems_libio_config( &BSP_Configuration, BSP_LIBIO_MAX_FDS );
bsp_isr_level = rtems_initialize_executive_early(
&BSP_Configuration,
&Cpu_table
);
}
