source: rtems/c/src/lib/libbsp/sparc/leon3/startup/bspstart.c @ 45a34d82

/*
 *  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.
 *
 *  $Id$
 */


#include <string.h>

#include <bsp.h>
#include <bsp/bootcard.h>
#include <rtems/bspIo.h>

/* must be identical to STACK_SIZE in start.S */
#define STACK_SIZE 16 * 1024

/*
 *  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;

/*
 * 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)
{
  bsp_spurious_initialize();
}

/*
 *  This method returns the base address and size of the area which
 *  is to be allocated between the RTEMS Workspace and the C Program
 *  Heap.
 */
void bsp_get_work_area(
  void   **work_area_start,
  size_t  *work_area_size,
  void   **heap_start,
  size_t  *heap_size
)
{
  /* Tells us where to put the workspace in case remote debugger is present.  */
  extern uint32_t rdb_start;

  *work_area_start       = &end;
  *work_area_size       = (void *)rdb_start - (void *)&end - STACK_SIZE;
  *heap_start = BSP_BOOTCARD_HEAP_USES_WORK_AREA;
  *heap_size = BSP_BOOTCARD_HEAP_SIZE_DEFAULT;
}

/*
 *  bsp_start
 *
 *  This routine does the bulk of the system initialization.
 */
void bsp_start( void )
{
  CPU_SPARC_HAS_SNOOPING = set_snooping();
}