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/* 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.
*
* 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>
/*
* 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;
/*
* Use the shared implementations of the following routines
*/
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, unsigned32, int );
/*PAGE
*
* 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;
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);
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
/* PAGE
*
* bsp_predriver_hook
*
* Initialization before drivers are setup.
*/
void bsp_predriver_hook(void)
{
initialize_external_exception_vector();
}
/*PAGE
*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
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 );
/*
* 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".
*/
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;
/*
* initialize the CPU table for this BSP
*/
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.clicks_per_usec = 66666667 / 4000000; */
Cpu_table.clicks_per_usec = 66666667 / 4000000 / 2;
Cpu_table.do_zero_of_workspace = TRUE;
Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;
/*
* Enable whatever caching is desired
*/
#if ( PPC_USE_INSTRUCTION_CACHE )
powerpc_instruction_cache_enable ();
#endif
#if ( PPC_USE_DATA_CACHE )
powerpc_data_cache_enable ();
#endif
}
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