em_mpu.c

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/***************************************************************************/
#include "em_mpu.h"
#if defined(__MPU_PRESENT) && (__MPU_PRESENT == 1)
#include "em_assert.h"


/***************************************************************************/
/***************************************************************************/
/*******************************************************************************
 **************************   GLOBAL FUNCTIONS   *******************************
 ******************************************************************************/


/***************************************************************************/
void MPU_ConfigureRegion(const MPU_RegionInit_TypeDef *init)
{
  EFM_ASSERT(init->regionNo < ((MPU->TYPE & MPU_TYPE_DREGION_Msk) >>
                                MPU_TYPE_DREGION_Pos));

  MPU->RNR = init->regionNo;

  if (init->regionEnable)
  {
    EFM_ASSERT(!(init->baseAddress & ~MPU_RBAR_ADDR_Msk));
    EFM_ASSERT(init->tex <= 0x7);

    MPU->RBAR = init->baseAddress;
    MPU->RASR = ((init->disableExec ? 1 : 0)   << MPU_RASR_XN_Pos)
                | (init->accessPermission      << MPU_RASR_AP_Pos)
                | (init->tex                   << MPU_RASR_TEX_Pos)
                | ((init->shareable   ? 1 : 0) << MPU_RASR_S_Pos)
                | ((init->cacheable   ? 1 : 0) << MPU_RASR_C_Pos)
                | ((init->bufferable  ? 1 : 0) << MPU_RASR_B_Pos)
                | (init->srd                   << MPU_RASR_SRD_Pos)
                | (init->size                  << MPU_RASR_SIZE_Pos)
                | (1                           << MPU_RASR_ENABLE_Pos);
  }
  else
  {
    MPU->RBAR = 0;
    MPU->RASR = 0;
  }
}


#endif /* defined(__MPU_PRESENT) && (__MPU_PRESENT == 1) */