VOID
EFIAPI
SpiPhaseInit (
VOID
)
/*++
Routine Description:
This function is a a hook for Spi Smm phase specific initialization
Arguments:
None
Returns:
None
--*/
{
UINTN Index;
//
// Save SPI Registers for S3 resume usage
//
for (Index = 0; Index < sizeof (mSpiRegister) / sizeof (UINT32); Index++) {
S3BootScriptSaveMemWrite (
S3BootScriptWidthUint32,
(UINTN) (mSpiInstance->PchRootComplexBar + mSpiRegister[Index]),
1,
(VOID *) (UINTN) (mSpiInstance->PchRootComplexBar + mSpiRegister[Index])
);
}
}
/**
Internal function to add memory write opcode to the table.
@param Marker The variable argument list to get the opcode
and associated attributes.
@retval EFI_OUT_OF_RESOURCES Not enough resource to do operation.
@retval EFI_SUCCESS Opcode is added.
**/
EFI_STATUS
BootScriptWriteMemWrite (
IN VA_LIST Marker
)
{
S3_BOOT_SCRIPT_LIB_WIDTH Width;
UINT64 Address;
UINTN Count;
UINT8 *Buffer;
Width = VA_ARG (Marker, S3_BOOT_SCRIPT_LIB_WIDTH);
Address = VA_ARG (Marker, UINT64);
Count = VA_ARG (Marker, UINTN);
Buffer = VA_ARG (Marker, UINT8 *);
return S3BootScriptSaveMemWrite (Width, Address, Count, Buffer);
}
VOID
EFIAPI
SpiPhaseInit (
VOID
)
/*++
Routine Description:
This function is a a hook for Spi Dxe phase specific initialization
Arguments:
None
Returns:
None
--*/
{
UINTN Index;
//
// Disable SMM BIOS write protect if it's not a SMM protocol
//
MmioAnd8 (
PciDeviceMmBase (PCI_BUS_NUMBER_QNC,
PCI_DEVICE_NUMBER_QNC_LPC,
PCI_FUNCTION_NUMBER_QNC_LPC) + R_QNC_LPC_BIOS_CNTL,
(UINT8) (~B_QNC_LPC_BIOS_CNTL_SMM_BWP)
);
//
// Save SPI Registers for S3 resume usage
//
for (Index = 0; Index < sizeof (mSpiRegister) / sizeof (UINT32); Index++) {
S3BootScriptSaveMemWrite (
S3BootScriptWidthUint32,
(UINTN) (mSpiInstance->PchRootComplexBar + mSpiRegister[Index]),
1,
(VOID *) (UINTN) (mSpiInstance->PchRootComplexBar + mSpiRegister[Index])
);
}
}
EFI_STATUS
EFIAPI
SpiProtocolLock (
IN EFI_SPI_PROTOCOL *This
)
/*++
Routine Description:
Lock the SPI Static Configuration Interface.
Once locked, the interface can not be changed and can only be clear by system reset.
Arguments:
This Pointer to the EFI_SPI_PROTOCOL instance.
Returns:
EFI_SUCCESS Lock operation succeed.
EFI_DEVICE_ERROR Device error, operation failed.
EFI_ACCESS_DENIED The interface has already been locked.
--*/
{
SPI_INSTANCE *SpiInstance;
UINTN PchRootComplexBar;
SpiInstance = SPI_INSTANCE_FROM_SPIPROTOCOL (This);
PchRootComplexBar = SpiInstance->PchRootComplexBar;
//
// Check if the SPI interface has been locked-down.
//
if ((MmioRead16 (PchRootComplexBar + R_QNC_RCRB_SPIS) & B_QNC_RCRB_SPIS_SCL) != 0) {
return EFI_ACCESS_DENIED;
}
//
// Lock-down the configuration interface.
//
MmioOr16 ((UINTN) (PchRootComplexBar + R_QNC_RCRB_SPIS), (UINT16) (B_QNC_RCRB_SPIS_SCL));
//
// Verify if it's really locked.
//
if ((MmioRead16 (PchRootComplexBar + R_QNC_RCRB_SPIS) & B_QNC_RCRB_SPIS_SCL) == 0) {
return EFI_DEVICE_ERROR;
} else {
//
// Save updated register in S3 Boot script.
//
S3BootScriptSaveMemWrite (
S3BootScriptWidthUint16,
(UINTN) (PchRootComplexBar + R_QNC_RCRB_SPIS),
1,
(VOID *) (UINTN) (PchRootComplexBar + R_QNC_RCRB_SPIS)
);
}
return EFI_SUCCESS;
}
