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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) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* Modified for LEON3 BSP.
* COPYRIGHT (c) 2004.
* Gaisler Research.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
/* must be identical to STACK_SIZE in start.S */
#define STACK_SIZE 16 * 1024
#include <string.h>
#include <bsp.h>
#include <rtems/bspIo.h>
/*
* Tells us where to put the workspace in case remote debugger is present.
*/
extern uint32_t rdb_start;
/*
* Tells us if data cache snooping is available
*/
int CPU_SPARC_HAS_SNOOPING;
void bsp_libc_init( void *, uint32_t, int );
extern void bsp_spurious_initialize();
/*
* set_snooping
*
* Read the data cache configuration register to determine if
* bus snooping is available. This is needed for some drivers so
* that they can select the most efficient copy routines.
*
*/
static inline int set_snooping(void)
{
int tmp;
asm(" lda [%1] 2, %0 "
: "=r"(tmp)
: "r"(0xC)
);
return (tmp >> 27) & 1;
}
/*
* 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;
uint32_t heap_start;
uint32_t heap_size;
heap_start = (uint32_t) &end;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
heap_size = Configuration.work_space_start - (void *)&end - STACK_SIZE;
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
bsp_spurious_initialize();
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
unsigned char *work_space_start;
work_space_start =
(unsigned char *)rdb_start - rtems_configuration_get_work_space_size();
if ( work_space_start <= (unsigned char *)&end ) {
printk( "bspstart: Not enough RAM!!!\n" );
BSP_fatal_return();
}
Configuration.work_space_start = work_space_start;
CPU_SPARC_HAS_SNOOPING = set_snooping();
}
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