|
|
/*-------------------------------------------------------------------------+
| bspstart.c v1.1 - PC386 BSP - 1997/08/07
+--------------------------------------------------------------------------+
| This file contains the PC386 BSP startup package. It includes application,
| board, and monitor specific initialization and configuration. The generic CPU
| dependent initialization has been performed before this routine is invoked.
+--------------------------------------------------------------------------+
| (C) Copyright 1997 -
| - NavIST Group - Real-Time Distributed Systems and Industrial Automation
|
| http://pandora.ist.utl.pt
|
| Instituto Superior Tecnico * Lisboa * PORTUGAL
+--------------------------------------------------------------------------+
| Disclaimer:
|
| This file is provided "AS IS" without warranty of any kind, either
| expressed or implied.
+--------------------------------------------------------------------------+
| This code is based on:
| bspstart.c,v 1.8 1996/05/28 13:12:40 joel Exp - go32 BSP
| With the following copyright notice:
| **************************************************************************
| * 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 found in the file LICENSE in this distribution or at
| * http://www.OARcorp.com/rtems/license.html.
| **************************************************************************
|
| $Id$
+--------------------------------------------------------------------------*/
#include <bsp.h>
#include <libcsupport.h>
#include <rtems/libio.h>
/*-------------------------------------------------------------------------+
| Global Variables
+--------------------------------------------------------------------------*/
extern rtems_unsigned32 _end; /* End of BSS. Defined in 'linkcmds'. */
extern rtems_unsigned32 _heap_size; /* Size of stack. Defined in 'start.s'. */
extern rtems_unsigned32 _stack_size; /* Size of heap. Defined in 'start.s'. */
rtems_unsigned32 rtemsFreeMemStart;
/* Address of start of free memory - should be updated
after creating new partitions or regions. */
/* The original BSP configuration 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; /* CPU configuration table. */
char *rtems_progname; /* Program name - from main(). */
/*-------------------------------------------------------------------------+
| External Prototypes
+--------------------------------------------------------------------------*/
extern void _exit(int); /* define in exit.c */
void bsp_libc_init( void *, unsigned32, int );
void bsp_postdriver_hook(void);
extern void rtems_irq_mngt_init();
/*-------------------------------------------------------------------------+
| Function: bsp_pretasking_hook
| Description: BSP pretasking hook. Called just before drivers are
| initialized. Used to setup libc and install any BSP
| extensions. NOTE: Must not use libc (to do io) from here,
| since drivers are not yet initialized.
| Global Variables: None.
| Arguments: None.
| Returns: Nothing.
+--------------------------------------------------------------------------*/
void bsp_pretasking_hook(void)
{
if (rtemsFreeMemStart & (CPU_ALIGNMENT - 1)) /* not aligned => align it */
rtemsFreeMemStart = (rtemsFreeMemStart+CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
bsp_libc_init((void *)rtemsFreeMemStart, _heap_size, 0);
rtemsFreeMemStart += _heap_size; /* HEAP_SIZE in KBytes */
#ifdef RTEMS_DEBUG
rtems_debug_enable(RTEMS_DEBUG_ALL_MASK);
#endif /* RTEMS_DEBUG */
} /* bsp_pretasking_hook */
/*-------------------------------------------------------------------------+
| Function: bsp_start
| Description: Called before main is invoked.
| Global Variables: None.
| Arguments: None.
| Returns: Nothing.
+--------------------------------------------------------------------------*/
void bsp_start( void )
{
rtemsFreeMemStart = (rtems_unsigned32)&_end + _heap_size + _stack_size;
/* set the value of start of free memory. */
/* If we don't have command line arguments set default program name. */
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.predriver_hook = NULL; /* use system's */
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 = get_ds();
Cpu_table.interrupt_table_offset = (void *)Interrupt_descriptor_table;
Cpu_table.interrupt_stack_size = 4096;
Cpu_table.extra_mpci_receive_server_stack = 0;
/* Place RTEMS workspace at beginning of free memory. */
if (rtemsFreeMemStart & (CPU_ALIGNMENT - 1)) /* not aligned => align it */
rtemsFreeMemStart = (rtemsFreeMemStart+CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
BSP_Configuration.work_space_start = (void *)rtemsFreeMemStart;
rtemsFreeMemStart += BSP_Configuration.work_space_size;
console_reserve_resources(&BSP_Configuration);
/*
* Init trems_interrupt_management
*/
rtems_irq_mngt_init();
/*
* The following information is very useful when debugging.
*/
#if 0
printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size );
printk( "maximum_extensions = 0x%x\n", BSP_Configuration.maximum_extensions );
printk( "microseconds_per_tick = 0x%x\n",
BSP_Configuration.microseconds_per_tick );
printk( "ticks_per_timeslice = 0x%x\n",
BSP_Configuration.ticks_per_timeslice );
printk( "maximum_devices = 0x%x\n", BSP_Configuration.maximum_devices );
printk( "number_of_device_drivers = 0x%x\n",
BSP_Configuration.number_of_device_drivers );
printk( "Device_driver_table = 0x%x\n",
BSP_Configuration.Device_driver_table );
printk( "_heap_size = 0x%x\n", _heap_size );
printk( "_stack_size = 0x%x\n", _stack_size );
printk( "rtemsFreeMemStart = 0x%x\n", rtemsFreeMemStart );
printk( "work_space_start = 0x%x\n", BSP_Configuration.work_space_start );
printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size );
#endif
} /* bsp_start */
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