//*****************************************************************************
//
//! Save sector protection to make it permanent
//
//*****************************************************************************
uint32_t
FlashProtectionSave(uint32_t ui32SectorAddress)
{
uint32_t ui32ErrorReturn;
uint32_t ui32SectorNumber;
uint32_t ui32CcfgSectorAddr;
uint32_t ui32ProgBuf;
ui32ErrorReturn = FAPI_STATUS_SUCCESS;
//
// Check the arguments.
//
ASSERT(ui32SectorAddress <= (FLASHMEM_BASE + FlashSizeGet() -
FlashSectorSizeGet()));
ASSERT((ui32SectorAddress & (FlashSectorSizeGet() - 1)) == 00);
if(FlashProtectionGet(ui32SectorAddress) == FLASH_WRITE_PROTECT)
{
//
// Find sector number for specified sector.
//
ui32SectorNumber = (ui32SectorAddress - FLASHMEM_BASE) / FlashSectorSizeGet();
ui32CcfgSectorAddr = FLASHMEM_BASE + FlashSizeGet() - FlashSectorSizeGet();
//
// Adjust CCFG address to the 32-bit CCFG word holding the
// protect-bit for the specified sector.
//
ui32CcfgSectorAddr += (((ui32SectorNumber >> 5) * 4) + CCFG_OFFSET_SECT_PROT);
//
// Find value to program by setting the protect-bit which
// corresponds to specified sector number, to 0.
// Leave other protect-bits unchanged.
//
ui32ProgBuf = (~(1 << (ui32SectorNumber & 0x1F))) &
*(uint32_t *)ui32CcfgSectorAddr;
ui32ErrorReturn = FlashProgram((uint8_t*)&ui32ProgBuf, ui32CcfgSectorAddr,
CCFG_SIZE_SECT_PROT);
}
//*****************************************************************************
//
//! Get sector protection
//
//*****************************************************************************
uint32_t
FlashsafeProtectionGet(uint32_t ui32SectorAddress)
{
uint32_t ui32SectorProtect;
//
// Check the arguments.
//
ASSERT(ui32SectorAddress <= (FLASHMEM_BASE + FlashsafeSizeGet() -
FlashsafeSectorSizeGet()));
ASSERT((ui32SectorAddress & (FlashsafeSectorSizeGet() - 1)) == 00);
if(FlashsafeSMPHTryAcquire())
{
ui32SectorProtect = FlashProtectionGet(ui32SectorAddress);
FlashsafeSMPHRelease();
return(ui32SectorProtect);
}
return(FLASHSAFE_ACCESS_DENIED);
}
