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/*
* 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.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
* All rights assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found 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>
/*
* The original table from the application and our copy of it with
* some changes.
*/
rtems_configuration_table BSP_Configuration;
rtems_cpu_table Cpu_table;
/*
* Use the shared implementations of the following routines
*/
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, unsigned32, int );
/*
* bsp_pretasking_hook
*
* BSP pretasking hook. Called just before drivers are initialized.
* Used to setup libc and install any BSP extensions.
*/
void bsp_pretasking_hook(void)
{
extern int end;
rtems_unsigned32 heap_start;
rtems_unsigned32 heap_size;
rtems_isr_entry old_handler;
rtems_status_code sc;
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 */
bsp_libc_init((void *) heap_start, heap_size, 0);
sc = interrupt_controller_init();
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
unsigned char *work_space_start;
unsigned32 RAM_end = 0;
#if 1
/*
* Set MSR to show vectors at 0 XXX
*/
rtems_unsigned32 msr_value;
_CPU_MSR_Value( msr_value );
msr_value &= ~PPC_MSR_EP;
_CPU_MSR_SET( msr_value );
#endif
/*
* Set up our hooks
* Make sure libc_init is done before drivers initialized so that
* they can use atexit()
*/
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.postdriver_hook = bsp_postdriver_hook;
Cpu_table.interrupt_stack_size = (12 * 1024);
/*
* The monitor likes the exception table to be at 0x0.
*/
Cpu_table.exceptions_in_RAM = TRUE;
/*
#if defined(RTEMS_POSIX_API)
BSP_Configuration.work_space_size *= 3;
#endif
*/
/* from PSIM - why? */
BSP_Configuration.work_space_size += 1024;
/* determine memory size */
switch (Falcon_MEMCR.MemSize) {
case RAM_16_MB:
RAM_end = 16 * 1024 * 1024;
break;
case RAM_32_MB:
RAM_end = 32 * 1024 * 1024;
break;
case RAM_64_MB:
RAM_end = 64 * 1024 * 1024;
break;
case RAM_128_MB:
RAM_end = 128 * 1024 * 1024;
break;
}
RAM_end -= 1024 * 1024; /* reserve memory for PPCBUG */
work_space_start =
(unsigned char *)RAM_end - BSP_Configuration.work_space_size;
if ( work_space_start <= (unsigned char *)&end ) {
printk( "bspstart: Not enough RAM!!!\n" );
bsp_cleanup();
}
BSP_Configuration.work_space_start = work_space_start;
/*
* Account for the console's resources
*/
console_reserve_resources( &BSP_Configuration );
}
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