//*****************************************************************************
//
//! Set sector protection
//
//*****************************************************************************
void
FlashProtectionSet(uint32_t ui32SectorAddress, uint32_t ui32ProtectMode)
{
uint32_t ui32SectorNumber;
//
// Check the arguments.
//
ASSERT(ui32SectorAddress <= (FLASHMEM_BASE + FlashSizeGet() -
FlashSectorSizeGet()));
ASSERT((ui32SectorAddress & (FlashSectorSizeGet() - 1)) == 00);
if(ui32ProtectMode == FLASH_WRITE_PROTECT)
{
ui32SectorNumber = (ui32SectorAddress - FLASHMEM_BASE) /
FlashSectorSizeGet();
HWREG(FLASH_BASE + FLASH_O_FSM_WR_ENA) = FSM_REG_WRT_ENABLE;
if(ui32SectorNumber <= 31)
{
HWREG(FLASH_BASE + FLASH_O_FSM_BSLE0) |= (1 << ui32SectorNumber);
HWREG(FLASH_BASE + FLASH_O_FSM_BSLP0) |= (1 << ui32SectorNumber);
}
else if(ui32SectorNumber <= 63)
{
HWREG(FLASH_BASE + FLASH_O_FSM_BSLE1) |=
(1 << (ui32SectorNumber & 0x1F));
HWREG(FLASH_BASE + FLASH_O_FSM_BSLP1) |=
(1 << (ui32SectorNumber & 0x1F));
}
HWREG(FLASH_BASE + FLASH_O_FSM_WR_ENA) = FSM_REG_WRT_DISABLE;
}
}
//*****************************************************************************
//
//! 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
FlashProtectionGet(uint32_t ui32SectorAddress)
{
uint32_t ui32SectorProtect;
uint32_t ui32SectorNumber;
//
// Check the arguments.
//
ASSERT(ui32SectorAddress <= (FLASHMEM_BASE + FlashSizeGet() -
FlashSectorSizeGet()));
ASSERT((ui32SectorAddress & (FlashSectorSizeGet() - 1)) == 00);
ui32SectorProtect = FLASH_NO_PROTECT;
ui32SectorNumber = (ui32SectorAddress - FLASHMEM_BASE) / FlashSectorSizeGet();
if(ui32SectorNumber <= 31)
{
if((HWREG(FLASH_BASE + FLASH_O_FSM_BSLE0) & (1 << ui32SectorNumber)) &&
(HWREG(FLASH_BASE + FLASH_O_FSM_BSLP0) & (1 << ui32SectorNumber)))
{
ui32SectorProtect = FLASH_WRITE_PROTECT;
}
}
else if(ui32SectorNumber <= 63)
{
if((HWREG(FLASH_BASE + FLASH_O_FSM_BSLE1) &
(1 << (ui32SectorNumber & 0x1F))) &&
(HWREG(FLASH_BASE + FLASH_O_FSM_BSLP1) &
(1 << (ui32SectorNumber & 0x1F))))
{
ui32SectorProtect = FLASH_WRITE_PROTECT;
}
}
return(ui32SectorProtect);
}
//*****************************************************************************
//
//! Get size of a flash sector in no of bytes
//
//*****************************************************************************
uint32_t
FlashsafeSectorSizeGet(void)
{
return(FlashSectorSizeGet());
}
