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