getcfg.c

来自「RTEMS (Real-Time Executive for Multiproc」· C语言 代码 · 共 65 行

/*  void Shm_Get_configuration( localnode, &shmcfg )
 *
 *  This routine initializes, if necessary, and returns a pointer
 *  to the Shared Memory Configuration Table for the PowerPC PSIM.
 *
 *  INPUT PARAMETERS:
 *    localnode - local node number
 *    shmcfg    - address of pointer to SHM Config Table
 *
 *  OUTPUT PARAMETERS:
 *    *shmcfg   - pointer to SHM Config Table
 *
 *  NOTES:  No interrupt support.
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 *
 *  $Id: getcfg.c,v 1.4.8.1 2003/09/04 18:45:12 joel Exp $
 */

#include <rtems.h>
#include "shm_driver.h"

#define INTERRUPT 0                   /* PSIM target supports only */
#define POLLING   1                   /* polling mode. */

shm_config_table BSP_shm_cfgtbl;

void Shm_Get_configuration(
  rtems_unsigned32   localnode,
  shm_config_table **shmcfg
)
{
   BSP_shm_cfgtbl.base         = (rtems_unsigned32 *)0xc0000000;
   BSP_shm_cfgtbl.length       = 64 * 1024;
   BSP_shm_cfgtbl.format       = SHM_BIG;

   BSP_shm_cfgtbl.cause_intr   = Shm_Cause_interrupt;

#ifdef NEUTRAL_BIG
   BSP_shm_cfgtbl.convert      = NULL_CONVERT;
#else
   BSP_shm_cfgtbl.convert      = CPU_swap_u32;
#endif

#if (POLLING==1)
   BSP_shm_cfgtbl.poll_intr    = POLLED_MODE;
   BSP_shm_cfgtbl.Intr.address = NO_INTERRUPT;
   BSP_shm_cfgtbl.Intr.value   = NO_INTERRUPT;
   BSP_shm_cfgtbl.Intr.length  = NO_INTERRUPT;
#else
   BSP_shm_cfgtbl.poll_intr    = INTR_MODE;
   BSP_shm_cfgtbl.Intr.address = 0;
   BSP_shm_cfgtbl.Intr.value   = 0;
   BSP_shm_cfgtbl.Intr.length  = BYTE;
#endif

   *shmcfg = &BSP_shm_cfgtbl;

}