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#include <Library/PcdLib.h>
#include <Library/DebugLib.h>
#include <Library/IoLib.h>
#include <Library/ArmGicLib.h>
#include <Library/UncachedMemoryAllocationLib.h>
#include <Protocol/Hash.h>
#include <Platform/ArmPlatform.h>
#include <Platform/Exynos5250.h>
#include "HashDxe.h"
#define CLOCK_ON 1
#define CLOCK_OFF 0
EFI_STATUS
EFIAPI
CryptoClockGating (
IN UINT32 clock_status
)
{
EFI_STATUS Status = EFI_SUCCESS;
UINT32 CmuBase;
UINT32 value;
CmuBase = PcdGet32(PcdCmuBase);
value = MmioRead32(CmuBase + SSS_CMU_OFFSET);
if (clock_status == CLOCK_ON)
MmioWrite32(CmuBase + SSS_CMU_OFFSET, value | CLK_SSS);
else if (clock_status == CLOCK_OFF)
MmioWrite32(CmuBase + SSS_CMU_OFFSET, value & ~CLK_SSS);
else {
DEBUG((EFI_D_ERROR, "[HashDxe] : Unsupported SSS clock status\n"));
Status = EFI_INVALID_PARAMETER;
}
return Status;
}
/**
Returns the size of the hash which results from a specific algorithm.
@param[in] This Points to this instance of EFI_HASH_PROTOCOL.
@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
@param[out] HashSize Holds the returned size of the algorithm's hash.
@retval EFI_SUCCESS Hash size returned successfully.
@retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported
by this driver.
**/
EFI_STATUS
EFIAPI
HashDxeGetHashSize (
IN CONST EFI_HASH_PROTOCOL *This,
IN CONST EFI_GUID *HashAlgorithm,
OUT UINTN *HashSize
)
{
EFI_STATUS Status = EFI_SUCCESS;
if (CompareGuid(HashAlgorithm, &gEfiHashAlgorithmSha1Guid))
*HashSize = sizeof(EFI_SHA1_HASH);
else if (CompareGuid(HashAlgorithm, &gEfiHashAlgorithmSha256Guid))
*HashSize = sizeof(EFI_SHA256_HASH);
else {
DEBUG((EFI_D_ERROR, "[HashDxe] : Unsupported Hash Algorithm\n"));
Status = EFI_UNSUPPORTED;
}
return Status;
}
/**
Returns the size of the hash which results from a specific algorithm.
@param[in] This Points to this instance of EFI_HASH_PROTOCOL.
@param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
@param[in] Extend Specifies whether to create a new hash (FALSE) or extend the specified
existing hash (TRUE).
@param[in] Message Points to the start of the message.
@param[in] MessageSize The size of Message, in bytes.
@param[in,out] Hash On input, if Extend is TRUE, then this holds the hash to extend. On
output, holds the resulting hash computed from the message.
@retval EFI_SUCCESS Hash returned successfully.
@retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported by this
driver. Or, Extend is TRUE, and the algorithm doesn't support extending the hash.
**/
EFI_STATUS
EFIAPI
HashDxeRunHash (
IN CONST EFI_HASH_PROTOCOL *This,
IN CONST EFI_GUID *HashAlgorithm,
IN BOOLEAN Extend,
IN CONST UINT8 *Message,
IN UINT64 MessageSize,
IN OUT EFI_HASH_OUTPUT *Hash
)
{
EFI_STATUS Status = EFI_SUCCESS;
UINT32 value;
UINT32 CryptoBase;
UINT32 TotalMessageSize;
UINT32 HashResult[8];
UINT8 *TempMessage;
CryptoBase = PcdGet32(PcdCryptoBase);
CryptoClockGating(CLOCK_ON);
/* Flush HRDMA */
MmioWrite32(CryptoBase + SSS_FC_HRDMAC, SSS_FC_HRDMACFLUSH_ON);
MmioWrite32(CryptoBase + SSS_FC_HRDMAC, SSS_FC_HRDMACFLUSH_OFF);
/* Set byte swap of in/out data and iv */
MmioWrite32(CryptoBase + SSS_HASH_BYTESWAP,
SSS_HASH_SWAPDI_ON | SSS_HASH_SWAPDO_ON | SSS_HASH_SWAPIV_ON);
/* Select HASH input mux as external source */
value = MmioRead32(CryptoBase + SSS_FC_FIFOCTRL);
value = (value & ~SSS_FC_SELHASH_MASK) | SSS_FC_SELHASH_EXOUT;
MmioWrite32(CryptoBase + SSS_FC_FIFOCTRL, value);
/* Set HASH algorithm and start hash engine */
if (CompareGuid(HashAlgorithm, &gEfiHashAlgorithmSha1Guid))
value = SSS_HASH_ENGSEL_SHA1HASH | SSS_HASH_STARTBIT_ON;
else if (CompareGuid(HashAlgorithm, &gEfiHashAlgorithmSha256Guid))
value = SSS_HASH_ENGSEL_SHA256HASH | SSS_HASH_STARTBIT_ON;
else {
DEBUG((EFI_D_ERROR, "[HashDxe] : Unsupported Hash Algorithm\n"));
Status = EFI_UNSUPPORTED;
return Status;
}
MmioWrite32(CryptoBase + SSS_HASH_CONTROL, value);
/* Enable FIFO mode */
MmioWrite32(CryptoBase + SSS_HASH_FIFO_MODE, SSS_HASH_FIFO_ON);
if (Extend == 0)
TotalMessageSize = MessageSize;
else if (Extend == 1) {
if (CompareGuid(HashAlgorithm, &gEfiHashAlgorithmSha1Guid)) {
TempMessage = (UINT8 *)UncachedAllocatePool(sizeof(EFI_SHA1_HASH) + MessageSize);
CopyMem(TempMessage, Hash, sizeof(EFI_SHA1_HASH));
CopyMem(TempMessage + sizeof(EFI_SHA1_HASH), Message, MessageSize);
TotalMessageSize = sizeof(EFI_SHA1_HASH) + MessageSize;
} else if (CompareGuid(HashAlgorithm, &gEfiHashAlgorithmSha256Guid)) {
TempMessage = (UINT8 *)UncachedAllocatePool(sizeof(EFI_SHA256_HASH) + MessageSize);
CopyMem(TempMessage, Hash, sizeof(EFI_SHA256_HASH));
CopyMem(TempMessage + sizeof(EFI_SHA256_HASH), Message, MessageSize);
TotalMessageSize = sizeof(EFI_SHA256_HASH) + MessageSize;
}
}
MmioWrite32(CryptoBase + SSS_HASH_MSGSIZE_LOW, TotalMessageSize);
MmioWrite32(CryptoBase + SSS_HASH_MSGSIZE_HIGH, 0);
/* Set HRDMA */
/*
* Message must be a physical address. Check it.
*/
if (Extend == 0)
MmioWrite32(CryptoBase + SSS_FC_HRDMAS, (UINT32)Message);
else if (Extend == 1)
MmioWrite32(CryptoBase + SSS_FC_HRDMAS, (UINT32)TempMessage);
MmioWrite32(CryptoBase + SSS_FC_HRDMAL, TotalMessageSize);
/* Check the HASH status */
while ((MmioRead32(CryptoBase + SSS_HASH_STATUS) & SSS_HASH_MSGDONE_MASK)
== SSS_HASH_MSGDONE_OFF);
/* Clear MSG_DONE bit */
MmioWrite32(CryptoBase + SSS_HASH_STATUS, SSS_HASH_MSGDONE_ON);
/* Read hash result */
HashResult[0] = MmioRead32(CryptoBase + SSS_HASH_RESULT1);
HashResult[1] = MmioRead32(CryptoBase + SSS_HASH_RESULT2);
HashResult[2] = MmioRead32(CryptoBase + SSS_HASH_RESULT3);
HashResult[3] = MmioRead32(CryptoBase + SSS_HASH_RESULT4);
HashResult[4] = MmioRead32(CryptoBase + SSS_HASH_RESULT5);
if (CompareGuid(HashAlgorithm, &gEfiHashAlgorithmSha256Guid)) {
HashResult[5] = MmioRead32(CryptoBase + SSS_HASH_RESULT6);
HashResult[6] = MmioRead32(CryptoBase + SSS_HASH_RESULT7);
HashResult[7] = MmioRead32(CryptoBase + SSS_HASH_RESULT8);
}
if (CompareGuid(HashAlgorithm, &gEfiHashAlgorithmSha1Guid))
CopyMem(Hash, HashResult, sizeof(EFI_SHA1_HASH));
else if (CompareGuid(HashAlgorithm, &gEfiHashAlgorithmSha256Guid))
CopyMem(Hash, HashResult, sizeof(EFI_SHA256_HASH));
else {
DEBUG((EFI_D_ERROR, "[HashDxe] : Unsupported Hash Algorithm\n"));
Status = EFI_UNSUPPORTED;
return Status;
}
MmioWrite32(CryptoBase + SSS_FC_INTPEND, SSS_FC_HRDMA);
return Status;
}
EFI_HASH_PROTOCOL gHash = {
HashDxeGetHashSize,
HashDxeRunHash
};
/**
Initialize the state information for the HashDxe
@param ImageHandle of the loaded driver
@param SystemTable Pointer to the System Table
@retval EFI_SUCCESS Protocol registered
@retval EFI_OUT_OF_RESOURCES Cannot allocate protocol data structure
@retval EFI_DEVICE_ERROR Hardware problems
**/
EFI_STATUS
EFIAPI
HashDxeInitialize (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status = EFI_SUCCESS;
Status = gBS->InstallMultipleProtocolInterfaces(
&ImageHandle,
&gEfiHashProtocolGuid,
&gHash,
NULL
);
return Status;
}
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