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@@ -0,0 +1,991 @@
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+/** @file NorFlash.c
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+
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+ Copyright (c) 2011 - 2020, Arm Limited. All rights reserved.<BR>
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+ Copyright (c) 2020, Linaro, Ltd. All rights reserved.<BR>
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+
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+ SPDX-License-Identifier: BSD-2-Clause-Patent
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+
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+**/
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+
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+#include <Library/BaseMemoryLib.h>
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+
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+#include "NorFlash.h"
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+
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+//
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+// Global variable declarations
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+//
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+extern NOR_FLASH_INSTANCE **mNorFlashInstances;
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+extern UINT32 mNorFlashDeviceCount;
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+
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+UINT32
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+NorFlashReadStatusRegister (
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+ IN NOR_FLASH_INSTANCE *Instance,
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+ IN UINTN SR_Address
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+ )
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+{
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+ // Prepare to read the status register
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+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_STATUS_REGISTER);
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+ return MmioRead32 (Instance->DeviceBaseAddress);
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+}
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+
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+STATIC
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+BOOLEAN
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+NorFlashBlockIsLocked (
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+ IN NOR_FLASH_INSTANCE *Instance,
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+ IN UINTN BlockAddress
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+ )
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+{
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+ UINT32 LockStatus;
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+
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+ // Send command for reading device id
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+ SEND_NOR_COMMAND (BlockAddress, 2, P30_CMD_READ_DEVICE_ID);
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+
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+ // Read block lock status
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+ LockStatus = MmioRead32 (CREATE_NOR_ADDRESS (BlockAddress, 2));
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+
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+ // Decode block lock status
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+ LockStatus = FOLD_32BIT_INTO_16BIT (LockStatus);
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+
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+ if ((LockStatus & 0x2) != 0) {
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+ DEBUG ((DEBUG_ERROR, "NorFlashBlockIsLocked: WARNING: Block LOCKED DOWN\n"));
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+ }
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+
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+ return ((LockStatus & 0x1) != 0);
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+}
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+
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+STATIC
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+EFI_STATUS
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+NorFlashUnlockSingleBlock (
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+ IN NOR_FLASH_INSTANCE *Instance,
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+ IN UINTN BlockAddress
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+ )
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+{
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+ UINT32 LockStatus;
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+
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+ // Raise the Task Priority Level to TPL_NOTIFY to serialise all its operations
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+ // and to protect shared data structures.
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+
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+ if (FeaturePcdGet (PcdNorFlashCheckBlockLocked) == TRUE) {
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+ do {
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+ // Request a lock setup
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+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_LOCK_BLOCK_SETUP);
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+
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+ // Request an unlock
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+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_UNLOCK_BLOCK);
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+
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+ // Send command for reading device id
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+ SEND_NOR_COMMAND (BlockAddress, 2, P30_CMD_READ_DEVICE_ID);
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+
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+ // Read block lock status
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+ LockStatus = MmioRead32 (CREATE_NOR_ADDRESS (BlockAddress, 2));
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+
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+ // Decode block lock status
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+ LockStatus = FOLD_32BIT_INTO_16BIT (LockStatus);
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+ } while ((LockStatus & 0x1) == 1);
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+ } else {
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+ // Request a lock setup
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+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_LOCK_BLOCK_SETUP);
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+
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+ // Request an unlock
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+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_UNLOCK_BLOCK);
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+
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+ // Wait until the status register gives us the all clear
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+ do {
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+ LockStatus = NorFlashReadStatusRegister (Instance, BlockAddress);
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+ } while ((LockStatus & P30_SR_BIT_WRITE) != P30_SR_BIT_WRITE);
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+ }
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+
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+ // Put device back into Read Array mode
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+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_READ_ARRAY);
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+
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+ DEBUG ((DEBUG_BLKIO, "UnlockSingleBlock: BlockAddress=0x%08x\n", BlockAddress));
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+
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+ return EFI_SUCCESS;
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+}
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+
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+EFI_STATUS
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+NorFlashUnlockSingleBlockIfNecessary (
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+ IN NOR_FLASH_INSTANCE *Instance,
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+ IN UINTN BlockAddress
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+ )
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+{
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+ EFI_STATUS Status;
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+
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+ Status = EFI_SUCCESS;
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+
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+ if (NorFlashBlockIsLocked (Instance, BlockAddress)) {
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+ Status = NorFlashUnlockSingleBlock (Instance, BlockAddress);
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+ }
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+
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+ return Status;
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+}
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+
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+/**
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+ * The following function presumes that the block has already been unlocked.
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+ **/
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+EFI_STATUS
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+NorFlashEraseSingleBlock (
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+ IN NOR_FLASH_INSTANCE *Instance,
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+ IN UINTN BlockAddress
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+ )
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+{
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+ EFI_STATUS Status;
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+ UINT32 StatusRegister;
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+
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+ Status = EFI_SUCCESS;
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+
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+ // Request a block erase and then confirm it
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+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_BLOCK_ERASE_SETUP);
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+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_BLOCK_ERASE_CONFIRM);
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+
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+ // Wait until the status register gives us the all clear
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+ do {
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+ StatusRegister = NorFlashReadStatusRegister (Instance, BlockAddress);
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+ } while ((StatusRegister & P30_SR_BIT_WRITE) != P30_SR_BIT_WRITE);
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+
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+ if (StatusRegister & P30_SR_BIT_VPP) {
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+ DEBUG ((DEBUG_ERROR, "EraseSingleBlock(BlockAddress=0x%08x: VPP Range Error\n", BlockAddress));
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+ Status = EFI_DEVICE_ERROR;
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+ }
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+
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+ if ((StatusRegister & (P30_SR_BIT_ERASE | P30_SR_BIT_PROGRAM)) == (P30_SR_BIT_ERASE | P30_SR_BIT_PROGRAM)) {
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+ DEBUG ((DEBUG_ERROR, "EraseSingleBlock(BlockAddress=0x%08x: Command Sequence Error\n", BlockAddress));
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+ Status = EFI_DEVICE_ERROR;
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+ }
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+
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+ if (StatusRegister & P30_SR_BIT_ERASE) {
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+ DEBUG ((DEBUG_ERROR, "EraseSingleBlock(BlockAddress=0x%08x: Block Erase Error StatusRegister:0x%X\n", BlockAddress, StatusRegister));
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+ Status = EFI_DEVICE_ERROR;
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+ }
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+
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+ if (StatusRegister & P30_SR_BIT_BLOCK_LOCKED) {
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+ // The debug level message has been reduced because a device lock might happen. In this case we just retry it ...
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+ DEBUG ((DEBUG_INFO, "EraseSingleBlock(BlockAddress=0x%08x: Block Locked Error\n", BlockAddress));
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+ Status = EFI_WRITE_PROTECTED;
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+ }
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+
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+ if (EFI_ERROR (Status)) {
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+ // Clear the Status Register
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+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_CLEAR_STATUS_REGISTER);
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+ }
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+
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+ // Put device back into Read Array mode
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+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
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+
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+ return Status;
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+}
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+
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+EFI_STATUS
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+NorFlashWriteSingleWord (
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+ IN NOR_FLASH_INSTANCE *Instance,
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+ IN UINTN WordAddress,
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+ IN UINT32 WriteData
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+ )
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+{
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+ EFI_STATUS Status;
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+ UINT32 StatusRegister;
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+
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+ Status = EFI_SUCCESS;
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+
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+ // Request a write single word command
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+ SEND_NOR_COMMAND (WordAddress, 0, P30_CMD_WORD_PROGRAM_SETUP);
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+
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+ // Store the word into NOR Flash;
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+ MmioWrite32 (WordAddress, WriteData);
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+
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+ // Wait for the write to complete and then check for any errors; i.e. check the Status Register
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+ do {
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+ // Prepare to read the status register
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+ StatusRegister = NorFlashReadStatusRegister (Instance, WordAddress);
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+ // The chip is busy while the WRITE bit is not asserted
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+ } while ((StatusRegister & P30_SR_BIT_WRITE) != P30_SR_BIT_WRITE);
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+
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+ // Perform a full status check:
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+ // Mask the relevant bits of Status Register.
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+ // Everything should be zero, if not, we have a problem
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+
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+ if (StatusRegister & P30_SR_BIT_VPP) {
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+ DEBUG ((DEBUG_ERROR, "NorFlashWriteSingleWord(WordAddress:0x%X): VPP Range Error\n", WordAddress));
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+ Status = EFI_DEVICE_ERROR;
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+ }
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+
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+ if (StatusRegister & P30_SR_BIT_PROGRAM) {
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+ DEBUG ((DEBUG_ERROR, "NorFlashWriteSingleWord(WordAddress:0x%X): Program Error\n", WordAddress));
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+ Status = EFI_DEVICE_ERROR;
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+ }
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+
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+ if (StatusRegister & P30_SR_BIT_BLOCK_LOCKED) {
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+ DEBUG ((DEBUG_ERROR, "NorFlashWriteSingleWord(WordAddress:0x%X): Device Protect Error\n", WordAddress));
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+ Status = EFI_DEVICE_ERROR;
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+ }
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+
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+ if (!EFI_ERROR (Status)) {
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+ // Clear the Status Register
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+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_CLEAR_STATUS_REGISTER);
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+ }
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+
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+ // Put device back into Read Array mode
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+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
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+
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+ return Status;
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+}
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+
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+/*
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+ * Writes data to the NOR Flash using the Buffered Programming method.
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+ *
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+ * The maximum size of the on-chip buffer is 32-words, because of hardware restrictions.
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+ * Therefore this function will only handle buffers up to 32 words or 128 bytes.
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+ * To deal with larger buffers, call this function again.
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+ *
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+ * This function presumes that both the TargetAddress and the TargetAddress+BufferSize
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+ * exist entirely within the NOR Flash. Therefore these conditions will not be checked here.
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+ *
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+ * In buffered programming, if the target address not at the beginning of a 32-bit word boundary,
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+ * then programming time is doubled and power consumption is increased.
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+ * Therefore, it is a requirement to align buffer writes to 32-bit word boundaries.
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+ * i.e. the last 4 bits of the target start address must be zero: 0x......00
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+ */
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+EFI_STATUS
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+NorFlashWriteBuffer (
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+ IN NOR_FLASH_INSTANCE *Instance,
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+ IN UINTN TargetAddress,
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+ IN UINTN BufferSizeInBytes,
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+ IN UINT32 *Buffer
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+ )
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+{
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+ EFI_STATUS Status;
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+ UINTN BufferSizeInWords;
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+ UINTN Count;
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+ volatile UINT32 *Data;
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+ UINTN WaitForBuffer;
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+ BOOLEAN BufferAvailable;
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+ UINT32 StatusRegister;
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+
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+ WaitForBuffer = MAX_BUFFERED_PROG_ITERATIONS;
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+ BufferAvailable = FALSE;
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+
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+ // Check that the target address does not cross a 32-word boundary.
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+ if ((TargetAddress & BOUNDARY_OF_32_WORDS) != 0) {
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+ return EFI_INVALID_PARAMETER;
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+ }
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+
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+ // Check there are some data to program
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+ if (BufferSizeInBytes == 0) {
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+ return EFI_BUFFER_TOO_SMALL;
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+ }
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+
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+ // Check that the buffer size does not exceed the maximum hardware buffer size on chip.
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+ if (BufferSizeInBytes > P30_MAX_BUFFER_SIZE_IN_BYTES) {
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+ return EFI_BAD_BUFFER_SIZE;
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+ }
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+
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+ // Check that the buffer size is a multiple of 32-bit words
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+ if ((BufferSizeInBytes % 4) != 0) {
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+ return EFI_BAD_BUFFER_SIZE;
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+ }
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+
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+ // Pre-programming conditions checked, now start the algorithm.
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+
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+ // Prepare the data destination address
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+ Data = (UINT32 *)TargetAddress;
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+
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+ // Check the availability of the buffer
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+ do {
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+ // Issue the Buffered Program Setup command
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+ SEND_NOR_COMMAND (TargetAddress, 0, P30_CMD_BUFFERED_PROGRAM_SETUP);
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+
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+ // Read back the status register bit#7 from the same address
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+ if (((*Data) & P30_SR_BIT_WRITE) == P30_SR_BIT_WRITE) {
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+ BufferAvailable = TRUE;
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+ }
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+
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+ // Update the loop counter
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+ WaitForBuffer--;
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+ } while ((WaitForBuffer > 0) && (BufferAvailable == FALSE));
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+
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+ // The buffer was not available for writing
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+ if (WaitForBuffer == 0) {
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+ Status = EFI_DEVICE_ERROR;
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+ goto EXIT;
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+ }
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+
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+ // From now on we work in 32-bit words
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+ BufferSizeInWords = BufferSizeInBytes / (UINTN)4;
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+
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+ // Write the word count, which is (buffer_size_in_words - 1),
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+ // because word count 0 means one word.
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+ SEND_NOR_COMMAND (TargetAddress, 0, (BufferSizeInWords - 1));
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+
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+ // Write the data to the NOR Flash, advancing each address by 4 bytes
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+ for (Count = 0; Count < BufferSizeInWords; Count++, Data++, Buffer++) {
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+ MmioWrite32 ((UINTN)Data, *Buffer);
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+ }
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+
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+ // Issue the Buffered Program Confirm command, to start the programming operation
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+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_BUFFERED_PROGRAM_CONFIRM);
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+
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+ // Wait for the write to complete and then check for any errors; i.e. check the Status Register
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+ do {
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+ StatusRegister = NorFlashReadStatusRegister (Instance, TargetAddress);
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+ // The chip is busy while the WRITE bit is not asserted
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+ } while ((StatusRegister & P30_SR_BIT_WRITE) != P30_SR_BIT_WRITE);
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+
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+ // Perform a full status check:
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+ // Mask the relevant bits of Status Register.
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+ // Everything should be zero, if not, we have a problem
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+
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+ Status = EFI_SUCCESS;
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+
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+ if (StatusRegister & P30_SR_BIT_VPP) {
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+ DEBUG ((DEBUG_ERROR, "NorFlashWriteBuffer(TargetAddress:0x%X): VPP Range Error\n", TargetAddress));
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+ Status = EFI_DEVICE_ERROR;
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+ }
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+
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+ if (StatusRegister & P30_SR_BIT_PROGRAM) {
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+ DEBUG ((DEBUG_ERROR, "NorFlashWriteBuffer(TargetAddress:0x%X): Program Error\n", TargetAddress));
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+ Status = EFI_DEVICE_ERROR;
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+ }
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+
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+ if (StatusRegister & P30_SR_BIT_BLOCK_LOCKED) {
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+ DEBUG ((DEBUG_ERROR, "NorFlashWriteBuffer(TargetAddress:0x%X): Device Protect Error\n", TargetAddress));
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+ Status = EFI_DEVICE_ERROR;
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+ }
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+
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+ if (!EFI_ERROR (Status)) {
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+ // Clear the Status Register
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+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_CLEAR_STATUS_REGISTER);
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+ }
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+
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+EXIT:
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+ // Put device back into Read Array mode
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+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
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+
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+ return Status;
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+}
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+
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+EFI_STATUS
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+NorFlashWriteBlocks (
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+ IN NOR_FLASH_INSTANCE *Instance,
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+ IN EFI_LBA Lba,
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+ IN UINTN BufferSizeInBytes,
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+ IN VOID *Buffer
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+ )
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+{
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+ UINT32 *pWriteBuffer;
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+ EFI_STATUS Status;
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+ EFI_LBA CurrentBlock;
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+ UINT32 BlockSizeInWords;
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+ UINT32 NumBlocks;
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+ UINT32 BlockCount;
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+
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+ Status = EFI_SUCCESS;
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+
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+ // The buffer must be valid
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+ if (Buffer == NULL) {
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+ return EFI_INVALID_PARAMETER;
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+ }
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+
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+ if (Instance->Media.ReadOnly == TRUE) {
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+ return EFI_WRITE_PROTECTED;
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+ }
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+
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+ // We must have some bytes to read
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+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteBlocks: BufferSizeInBytes=0x%x\n", BufferSizeInBytes));
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+ if (BufferSizeInBytes == 0) {
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+ return EFI_BAD_BUFFER_SIZE;
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+ }
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+
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+ // The size of the buffer must be a multiple of the block size
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+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteBlocks: BlockSize in bytes =0x%x\n", Instance->Media.BlockSize));
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+ if ((BufferSizeInBytes % Instance->Media.BlockSize) != 0) {
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+ return EFI_BAD_BUFFER_SIZE;
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+ }
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+
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+ // All blocks must be within the device
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|
+ NumBlocks = ((UINT32)BufferSizeInBytes) / Instance->Media.BlockSize;
|
|
|
+
|
|
|
+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteBlocks: NumBlocks=%d, LastBlock=%ld, Lba=%ld.\n", NumBlocks, Instance->Media.LastBlock, Lba));
|
|
|
+
|
|
|
+ if ((Lba + NumBlocks) > (Instance->Media.LastBlock + 1)) {
|
|
|
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteBlocks: ERROR - Write will exceed last block.\n"));
|
|
|
+ return EFI_INVALID_PARAMETER;
|
|
|
+ }
|
|
|
+
|
|
|
+ BlockSizeInWords = Instance->Media.BlockSize / 4;
|
|
|
+
|
|
|
+ // Because the target *Buffer is a pointer to VOID, we must put all the data into a pointer
|
|
|
+ // to a proper data type, so use *ReadBuffer
|
|
|
+ pWriteBuffer = (UINT32 *)Buffer;
|
|
|
+
|
|
|
+ CurrentBlock = Lba;
|
|
|
+ for (BlockCount = 0; BlockCount < NumBlocks; BlockCount++, CurrentBlock++, pWriteBuffer = pWriteBuffer + BlockSizeInWords) {
|
|
|
+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteBlocks: Writing block #%d\n", (UINTN)CurrentBlock));
|
|
|
+
|
|
|
+ Status = NorFlashWriteFullBlock (Instance, CurrentBlock, pWriteBuffer, BlockSizeInWords);
|
|
|
+
|
|
|
+ if (EFI_ERROR (Status)) {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteBlocks: Exit Status = \"%r\".\n", Status));
|
|
|
+ return Status;
|
|
|
+}
|
|
|
+
|
|
|
+#define BOTH_ALIGNED(a, b, align) ((((UINTN)(a) | (UINTN)(b)) & ((align) - 1)) == 0)
|
|
|
+
|
|
|
+/**
|
|
|
+ Copy Length bytes from Source to Destination, using aligned accesses only.
|
|
|
+ Note that this implementation uses memcpy() semantics rather then memmove()
|
|
|
+ semantics, i.e., SourceBuffer and DestinationBuffer should not overlap.
|
|
|
+
|
|
|
+ @param DestinationBuffer The target of the copy request.
|
|
|
+ @param SourceBuffer The place to copy from.
|
|
|
+ @param Length The number of bytes to copy.
|
|
|
+
|
|
|
+ @return Destination
|
|
|
+
|
|
|
+**/
|
|
|
+STATIC
|
|
|
+VOID *
|
|
|
+AlignedCopyMem (
|
|
|
+ OUT VOID *DestinationBuffer,
|
|
|
+ IN CONST VOID *SourceBuffer,
|
|
|
+ IN UINTN Length
|
|
|
+ )
|
|
|
+{
|
|
|
+ UINT8 *Destination8;
|
|
|
+ CONST UINT8 *Source8;
|
|
|
+ UINT32 *Destination32;
|
|
|
+ CONST UINT32 *Source32;
|
|
|
+ UINT64 *Destination64;
|
|
|
+ CONST UINT64 *Source64;
|
|
|
+
|
|
|
+ if (BOTH_ALIGNED (DestinationBuffer, SourceBuffer, 8) && (Length >= 8)) {
|
|
|
+ Destination64 = DestinationBuffer;
|
|
|
+ Source64 = SourceBuffer;
|
|
|
+ while (Length >= 8) {
|
|
|
+ *Destination64++ = *Source64++;
|
|
|
+ Length -= 8;
|
|
|
+ }
|
|
|
+
|
|
|
+ Destination8 = (UINT8 *)Destination64;
|
|
|
+ Source8 = (CONST UINT8 *)Source64;
|
|
|
+ } else if (BOTH_ALIGNED (DestinationBuffer, SourceBuffer, 4) && (Length >= 4)) {
|
|
|
+ Destination32 = DestinationBuffer;
|
|
|
+ Source32 = SourceBuffer;
|
|
|
+ while (Length >= 4) {
|
|
|
+ *Destination32++ = *Source32++;
|
|
|
+ Length -= 4;
|
|
|
+ }
|
|
|
+
|
|
|
+ Destination8 = (UINT8 *)Destination32;
|
|
|
+ Source8 = (CONST UINT8 *)Source32;
|
|
|
+ } else {
|
|
|
+ Destination8 = DestinationBuffer;
|
|
|
+ Source8 = SourceBuffer;
|
|
|
+ }
|
|
|
+
|
|
|
+ while (Length-- != 0) {
|
|
|
+ *Destination8++ = *Source8++;
|
|
|
+ }
|
|
|
+
|
|
|
+ return DestinationBuffer;
|
|
|
+}
|
|
|
+
|
|
|
+EFI_STATUS
|
|
|
+NorFlashReadBlocks (
|
|
|
+ IN NOR_FLASH_INSTANCE *Instance,
|
|
|
+ IN EFI_LBA Lba,
|
|
|
+ IN UINTN BufferSizeInBytes,
|
|
|
+ OUT VOID *Buffer
|
|
|
+ )
|
|
|
+{
|
|
|
+ UINT32 NumBlocks;
|
|
|
+ UINTN StartAddress;
|
|
|
+
|
|
|
+ DEBUG ((
|
|
|
+ DEBUG_BLKIO,
|
|
|
+ "NorFlashReadBlocks: BufferSize=0x%xB BlockSize=0x%xB LastBlock=%ld, Lba=%ld.\n",
|
|
|
+ BufferSizeInBytes,
|
|
|
+ Instance->Media.BlockSize,
|
|
|
+ Instance->Media.LastBlock,
|
|
|
+ Lba
|
|
|
+ ));
|
|
|
+
|
|
|
+ // The buffer must be valid
|
|
|
+ if (Buffer == NULL) {
|
|
|
+ return EFI_INVALID_PARAMETER;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Return if we have not any byte to read
|
|
|
+ if (BufferSizeInBytes == 0) {
|
|
|
+ return EFI_SUCCESS;
|
|
|
+ }
|
|
|
+
|
|
|
+ // The size of the buffer must be a multiple of the block size
|
|
|
+ if ((BufferSizeInBytes % Instance->Media.BlockSize) != 0) {
|
|
|
+ return EFI_BAD_BUFFER_SIZE;
|
|
|
+ }
|
|
|
+
|
|
|
+ // All blocks must be within the device
|
|
|
+ NumBlocks = ((UINT32)BufferSizeInBytes) / Instance->Media.BlockSize;
|
|
|
+
|
|
|
+ if ((Lba + NumBlocks) > (Instance->Media.LastBlock + 1)) {
|
|
|
+ DEBUG ((DEBUG_ERROR, "NorFlashReadBlocks: ERROR - Read will exceed last block\n"));
|
|
|
+ return EFI_INVALID_PARAMETER;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Get the address to start reading from
|
|
|
+ StartAddress = GET_NOR_BLOCK_ADDRESS (
|
|
|
+ Instance->RegionBaseAddress,
|
|
|
+ Lba,
|
|
|
+ Instance->Media.BlockSize
|
|
|
+ );
|
|
|
+
|
|
|
+ // Put the device into Read Array mode
|
|
|
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
|
|
|
+
|
|
|
+ // Readout the data
|
|
|
+ AlignedCopyMem (Buffer, (VOID *)StartAddress, BufferSizeInBytes);
|
|
|
+
|
|
|
+ return EFI_SUCCESS;
|
|
|
+}
|
|
|
+
|
|
|
+EFI_STATUS
|
|
|
+NorFlashRead (
|
|
|
+ IN NOR_FLASH_INSTANCE *Instance,
|
|
|
+ IN EFI_LBA Lba,
|
|
|
+ IN UINTN Offset,
|
|
|
+ IN UINTN BufferSizeInBytes,
|
|
|
+ OUT VOID *Buffer
|
|
|
+ )
|
|
|
+{
|
|
|
+ UINTN StartAddress;
|
|
|
+
|
|
|
+ // The buffer must be valid
|
|
|
+ if (Buffer == NULL) {
|
|
|
+ return EFI_INVALID_PARAMETER;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Return if we have not any byte to read
|
|
|
+ if (BufferSizeInBytes == 0) {
|
|
|
+ return EFI_SUCCESS;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (((Lba * Instance->Media.BlockSize) + Offset + BufferSizeInBytes) > Instance->Size) {
|
|
|
+ DEBUG ((DEBUG_ERROR, "NorFlashRead: ERROR - Read will exceed device size.\n"));
|
|
|
+ return EFI_INVALID_PARAMETER;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Get the address to start reading from
|
|
|
+ StartAddress = GET_NOR_BLOCK_ADDRESS (
|
|
|
+ Instance->RegionBaseAddress,
|
|
|
+ Lba,
|
|
|
+ Instance->Media.BlockSize
|
|
|
+ );
|
|
|
+
|
|
|
+ // Put the device into Read Array mode
|
|
|
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
|
|
|
+
|
|
|
+ // Readout the data
|
|
|
+ AlignedCopyMem (Buffer, (VOID *)(StartAddress + Offset), BufferSizeInBytes);
|
|
|
+
|
|
|
+ return EFI_SUCCESS;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ Write a full or portion of a block. It must not span block boundaries; that is,
|
|
|
+ Offset + *NumBytes <= Instance->Media.BlockSize.
|
|
|
+*/
|
|
|
+EFI_STATUS
|
|
|
+NorFlashWriteSingleBlock (
|
|
|
+ IN NOR_FLASH_INSTANCE *Instance,
|
|
|
+ IN EFI_LBA Lba,
|
|
|
+ IN UINTN Offset,
|
|
|
+ IN OUT UINTN *NumBytes,
|
|
|
+ IN UINT8 *Buffer
|
|
|
+ )
|
|
|
+{
|
|
|
+ EFI_STATUS TempStatus;
|
|
|
+ UINT32 Tmp;
|
|
|
+ UINT32 TmpBuf;
|
|
|
+ UINT32 WordToWrite;
|
|
|
+ UINT32 Mask;
|
|
|
+ BOOLEAN DoErase;
|
|
|
+ UINTN BytesToWrite;
|
|
|
+ UINTN CurOffset;
|
|
|
+ UINTN WordAddr;
|
|
|
+ UINTN BlockSize;
|
|
|
+ UINTN BlockAddress;
|
|
|
+ UINTN PrevBlockAddress;
|
|
|
+
|
|
|
+ PrevBlockAddress = 0;
|
|
|
+
|
|
|
+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteSingleBlock(Parameters: Lba=%ld, Offset=0x%x, *NumBytes=0x%x, Buffer @ 0x%08x)\n", Lba, Offset, *NumBytes, Buffer));
|
|
|
+
|
|
|
+ // Detect WriteDisabled state
|
|
|
+ if (Instance->Media.ReadOnly == TRUE) {
|
|
|
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteSingleBlock: ERROR - Can not write: Device is in WriteDisabled state.\n"));
|
|
|
+ // It is in WriteDisabled state, return an error right away
|
|
|
+ return EFI_ACCESS_DENIED;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Cache the block size to avoid de-referencing pointers all the time
|
|
|
+ BlockSize = Instance->Media.BlockSize;
|
|
|
+
|
|
|
+ // The write must not span block boundaries.
|
|
|
+ // We need to check each variable individually because adding two large values together overflows.
|
|
|
+ if ((Offset >= BlockSize) ||
|
|
|
+ (*NumBytes > BlockSize) ||
|
|
|
+ ((Offset + *NumBytes) > BlockSize))
|
|
|
+ {
|
|
|
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteSingleBlock: ERROR - EFI_BAD_BUFFER_SIZE: (Offset=0x%x + NumBytes=0x%x) > BlockSize=0x%x\n", Offset, *NumBytes, BlockSize));
|
|
|
+ return EFI_BAD_BUFFER_SIZE;
|
|
|
+ }
|
|
|
+
|
|
|
+ // We must have some bytes to write
|
|
|
+ if (*NumBytes == 0) {
|
|
|
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteSingleBlock: ERROR - EFI_BAD_BUFFER_SIZE: (Offset=0x%x + NumBytes=0x%x) > BlockSize=0x%x\n", Offset, *NumBytes, BlockSize));
|
|
|
+ return EFI_BAD_BUFFER_SIZE;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Pick 128bytes as a good start for word operations as opposed to erasing the
|
|
|
+ // block and writing the data regardless if an erase is really needed.
|
|
|
+ // It looks like most individual NV variable writes are smaller than 128bytes.
|
|
|
+ if (*NumBytes <= 128) {
|
|
|
+ // Check to see if we need to erase before programming the data into NOR.
|
|
|
+ // If the destination bits are only changing from 1s to 0s we can just write.
|
|
|
+ // After a block is erased all bits in the block is set to 1.
|
|
|
+ // If any byte requires us to erase we just give up and rewrite all of it.
|
|
|
+ DoErase = FALSE;
|
|
|
+ BytesToWrite = *NumBytes;
|
|
|
+ CurOffset = Offset;
|
|
|
+
|
|
|
+ while (BytesToWrite > 0) {
|
|
|
+ // Read full word from NOR, splice as required. A word is the smallest
|
|
|
+ // unit we can write.
|
|
|
+ TempStatus = NorFlashRead (Instance, Lba, CurOffset & ~(0x3), sizeof (Tmp), &Tmp);
|
|
|
+ if (EFI_ERROR (TempStatus)) {
|
|
|
+ return EFI_DEVICE_ERROR;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Physical address of word in NOR to write.
|
|
|
+ WordAddr = (CurOffset & ~(0x3)) + GET_NOR_BLOCK_ADDRESS (
|
|
|
+ Instance->RegionBaseAddress,
|
|
|
+ Lba,
|
|
|
+ BlockSize
|
|
|
+ );
|
|
|
+ // The word of data that is to be written.
|
|
|
+ TmpBuf = *((UINT32 *)(Buffer + (*NumBytes - BytesToWrite)));
|
|
|
+
|
|
|
+ // First do word aligned chunks.
|
|
|
+ if ((CurOffset & 0x3) == 0) {
|
|
|
+ if (BytesToWrite >= 4) {
|
|
|
+ // Is the destination still in 'erased' state?
|
|
|
+ if (~Tmp != 0) {
|
|
|
+ // Check to see if we are only changing bits to zero.
|
|
|
+ if ((Tmp ^ TmpBuf) & TmpBuf) {
|
|
|
+ DoErase = TRUE;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Write this word to NOR
|
|
|
+ WordToWrite = TmpBuf;
|
|
|
+ CurOffset += sizeof (TmpBuf);
|
|
|
+ BytesToWrite -= sizeof (TmpBuf);
|
|
|
+ } else {
|
|
|
+ // BytesToWrite < 4. Do small writes and left-overs
|
|
|
+ Mask = ~((~0) << (BytesToWrite * 8));
|
|
|
+ // Mask out the bytes we want.
|
|
|
+ TmpBuf &= Mask;
|
|
|
+ // Is the destination still in 'erased' state?
|
|
|
+ if ((Tmp & Mask) != Mask) {
|
|
|
+ // Check to see if we are only changing bits to zero.
|
|
|
+ if ((Tmp ^ TmpBuf) & TmpBuf) {
|
|
|
+ DoErase = TRUE;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Merge old and new data. Write merged word to NOR
|
|
|
+ WordToWrite = (Tmp & ~Mask) | TmpBuf;
|
|
|
+ CurOffset += BytesToWrite;
|
|
|
+ BytesToWrite = 0;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ // Do multiple words, but starting unaligned.
|
|
|
+ if (BytesToWrite > (4 - (CurOffset & 0x3))) {
|
|
|
+ Mask = ((~0) << ((CurOffset & 0x3) * 8));
|
|
|
+ // Mask out the bytes we want.
|
|
|
+ TmpBuf &= Mask;
|
|
|
+ // Is the destination still in 'erased' state?
|
|
|
+ if ((Tmp & Mask) != Mask) {
|
|
|
+ // Check to see if we are only changing bits to zero.
|
|
|
+ if ((Tmp ^ TmpBuf) & TmpBuf) {
|
|
|
+ DoErase = TRUE;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Merge old and new data. Write merged word to NOR
|
|
|
+ WordToWrite = (Tmp & ~Mask) | TmpBuf;
|
|
|
+ BytesToWrite -= (4 - (CurOffset & 0x3));
|
|
|
+ CurOffset += (4 - (CurOffset & 0x3));
|
|
|
+ } else {
|
|
|
+ // Unaligned and fits in one word.
|
|
|
+ Mask = (~((~0) << (BytesToWrite * 8))) << ((CurOffset & 0x3) * 8);
|
|
|
+ // Mask out the bytes we want.
|
|
|
+ TmpBuf = (TmpBuf << ((CurOffset & 0x3) * 8)) & Mask;
|
|
|
+ // Is the destination still in 'erased' state?
|
|
|
+ if ((Tmp & Mask) != Mask) {
|
|
|
+ // Check to see if we are only changing bits to zero.
|
|
|
+ if ((Tmp ^ TmpBuf) & TmpBuf) {
|
|
|
+ DoErase = TRUE;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Merge old and new data. Write merged word to NOR
|
|
|
+ WordToWrite = (Tmp & ~Mask) | TmpBuf;
|
|
|
+ CurOffset += BytesToWrite;
|
|
|
+ BytesToWrite = 0;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ //
|
|
|
+ // Write the word to NOR.
|
|
|
+ //
|
|
|
+
|
|
|
+ BlockAddress = GET_NOR_BLOCK_ADDRESS (Instance->RegionBaseAddress, Lba, BlockSize);
|
|
|
+ if (BlockAddress != PrevBlockAddress) {
|
|
|
+ TempStatus = NorFlashUnlockSingleBlockIfNecessary (Instance, BlockAddress);
|
|
|
+ if (EFI_ERROR (TempStatus)) {
|
|
|
+ return EFI_DEVICE_ERROR;
|
|
|
+ }
|
|
|
+
|
|
|
+ PrevBlockAddress = BlockAddress;
|
|
|
+ }
|
|
|
+
|
|
|
+ TempStatus = NorFlashWriteSingleWord (Instance, WordAddr, WordToWrite);
|
|
|
+ if (EFI_ERROR (TempStatus)) {
|
|
|
+ return EFI_DEVICE_ERROR;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Exit if we got here and could write all the data. Otherwise do the
|
|
|
+ // Erase-Write cycle.
|
|
|
+ if (!DoErase) {
|
|
|
+ return EFI_SUCCESS;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Check we did get some memory. Buffer is BlockSize.
|
|
|
+ if (Instance->ShadowBuffer == NULL) {
|
|
|
+ DEBUG ((DEBUG_ERROR, "FvbWrite: ERROR - Buffer not ready\n"));
|
|
|
+ return EFI_DEVICE_ERROR;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Read NOR Flash data into shadow buffer
|
|
|
+ TempStatus = NorFlashReadBlocks (Instance, Lba, BlockSize, Instance->ShadowBuffer);
|
|
|
+ if (EFI_ERROR (TempStatus)) {
|
|
|
+ // Return one of the pre-approved error statuses
|
|
|
+ return EFI_DEVICE_ERROR;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Put the data at the appropriate location inside the buffer area
|
|
|
+ CopyMem ((VOID *)((UINTN)Instance->ShadowBuffer + Offset), Buffer, *NumBytes);
|
|
|
+
|
|
|
+ // Write the modified buffer back to the NorFlash
|
|
|
+ TempStatus = NorFlashWriteBlocks (Instance, Lba, BlockSize, Instance->ShadowBuffer);
|
|
|
+ if (EFI_ERROR (TempStatus)) {
|
|
|
+ // Return one of the pre-approved error statuses
|
|
|
+ return EFI_DEVICE_ERROR;
|
|
|
+ }
|
|
|
+
|
|
|
+ return EFI_SUCCESS;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ Although DiskIoDxe will automatically install the DiskIO protocol whenever
|
|
|
+ we install the BlockIO protocol, its implementation is sub-optimal as it reads
|
|
|
+ and writes entire blocks using the BlockIO protocol. In fact we can access
|
|
|
+ NOR flash with a finer granularity than that, so we can improve performance
|
|
|
+ by directly producing the DiskIO protocol.
|
|
|
+*/
|
|
|
+
|
|
|
+/**
|
|
|
+ Read BufferSize bytes from Offset into Buffer.
|
|
|
+
|
|
|
+ @param This Protocol instance pointer.
|
|
|
+ @param MediaId Id of the media, changes every time the media is replaced.
|
|
|
+ @param Offset The starting byte offset to read from
|
|
|
+ @param BufferSize Size of Buffer
|
|
|
+ @param Buffer Buffer containing read data
|
|
|
+
|
|
|
+ @retval EFI_SUCCESS The data was read correctly from the device.
|
|
|
+ @retval EFI_DEVICE_ERROR The device reported an error while performing the read.
|
|
|
+ @retval EFI_NO_MEDIA There is no media in the device.
|
|
|
+ @retval EFI_MEDIA_CHANGED The MediaId does not match the current device.
|
|
|
+ @retval EFI_INVALID_PARAMETER The read request contains device addresses that are not
|
|
|
+ valid for the device.
|
|
|
+
|
|
|
+**/
|
|
|
+EFI_STATUS
|
|
|
+EFIAPI
|
|
|
+NorFlashDiskIoReadDisk (
|
|
|
+ IN EFI_DISK_IO_PROTOCOL *This,
|
|
|
+ IN UINT32 MediaId,
|
|
|
+ IN UINT64 DiskOffset,
|
|
|
+ IN UINTN BufferSize,
|
|
|
+ OUT VOID *Buffer
|
|
|
+ )
|
|
|
+{
|
|
|
+ NOR_FLASH_INSTANCE *Instance;
|
|
|
+ UINT32 BlockSize;
|
|
|
+ UINT32 BlockOffset;
|
|
|
+ EFI_LBA Lba;
|
|
|
+
|
|
|
+ Instance = INSTANCE_FROM_DISKIO_THIS (This);
|
|
|
+
|
|
|
+ if (MediaId != Instance->Media.MediaId) {
|
|
|
+ return EFI_MEDIA_CHANGED;
|
|
|
+ }
|
|
|
+
|
|
|
+ BlockSize = Instance->Media.BlockSize;
|
|
|
+ Lba = (EFI_LBA)DivU64x32Remainder (DiskOffset, BlockSize, &BlockOffset);
|
|
|
+
|
|
|
+ return NorFlashRead (Instance, Lba, BlockOffset, BufferSize, Buffer);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ Writes a specified number of bytes to a device.
|
|
|
+
|
|
|
+ @param This Indicates a pointer to the calling context.
|
|
|
+ @param MediaId ID of the medium to be written.
|
|
|
+ @param Offset The starting byte offset on the logical block I/O device to write.
|
|
|
+ @param BufferSize The size in bytes of Buffer. The number of bytes to write to the device.
|
|
|
+ @param Buffer A pointer to the buffer containing the data to be written.
|
|
|
+
|
|
|
+ @retval EFI_SUCCESS The data was written correctly to the device.
|
|
|
+ @retval EFI_WRITE_PROTECTED The device can not be written to.
|
|
|
+ @retval EFI_DEVICE_ERROR The device reported an error while performing the write.
|
|
|
+ @retval EFI_NO_MEDIA There is no media in the device.
|
|
|
+ @retval EFI_MEDIA_CHANGED The MediaId does not match the current device.
|
|
|
+ @retval EFI_INVALID_PARAMETER The write request contains device addresses that are not
|
|
|
+ valid for the device.
|
|
|
+
|
|
|
+**/
|
|
|
+EFI_STATUS
|
|
|
+EFIAPI
|
|
|
+NorFlashDiskIoWriteDisk (
|
|
|
+ IN EFI_DISK_IO_PROTOCOL *This,
|
|
|
+ IN UINT32 MediaId,
|
|
|
+ IN UINT64 DiskOffset,
|
|
|
+ IN UINTN BufferSize,
|
|
|
+ IN VOID *Buffer
|
|
|
+ )
|
|
|
+{
|
|
|
+ NOR_FLASH_INSTANCE *Instance;
|
|
|
+ UINT32 BlockSize;
|
|
|
+ UINT32 BlockOffset;
|
|
|
+ EFI_LBA Lba;
|
|
|
+ UINTN RemainingBytes;
|
|
|
+ UINTN WriteSize;
|
|
|
+ EFI_STATUS Status;
|
|
|
+
|
|
|
+ Instance = INSTANCE_FROM_DISKIO_THIS (This);
|
|
|
+
|
|
|
+ if (MediaId != Instance->Media.MediaId) {
|
|
|
+ return EFI_MEDIA_CHANGED;
|
|
|
+ }
|
|
|
+
|
|
|
+ BlockSize = Instance->Media.BlockSize;
|
|
|
+ Lba = (EFI_LBA)DivU64x32Remainder (DiskOffset, BlockSize, &BlockOffset);
|
|
|
+
|
|
|
+ RemainingBytes = BufferSize;
|
|
|
+
|
|
|
+ // Write either all the remaining bytes, or the number of bytes that bring
|
|
|
+ // us up to a block boundary, whichever is less.
|
|
|
+ // (DiskOffset | (BlockSize - 1)) + 1) rounds DiskOffset up to the next
|
|
|
+ // block boundary (even if it is already on one).
|
|
|
+ WriteSize = MIN (RemainingBytes, ((DiskOffset | (BlockSize - 1)) + 1) - DiskOffset);
|
|
|
+
|
|
|
+ do {
|
|
|
+ if (WriteSize == BlockSize) {
|
|
|
+ // Write a full block
|
|
|
+ Status = NorFlashWriteFullBlock (Instance, Lba, Buffer, BlockSize / sizeof (UINT32));
|
|
|
+ } else {
|
|
|
+ // Write a partial block
|
|
|
+ Status = NorFlashWriteSingleBlock (Instance, Lba, BlockOffset, &WriteSize, Buffer);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (EFI_ERROR (Status)) {
|
|
|
+ return Status;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Now continue writing either all the remaining bytes or single blocks.
|
|
|
+ RemainingBytes -= WriteSize;
|
|
|
+ Buffer = (UINT8 *)Buffer + WriteSize;
|
|
|
+ Lba++;
|
|
|
+ BlockOffset = 0;
|
|
|
+ WriteSize = MIN (RemainingBytes, BlockSize);
|
|
|
+ } while (RemainingBytes);
|
|
|
+
|
|
|
+ return Status;
|
|
|
+}
|
|
|
+
|
|
|
+EFI_STATUS
|
|
|
+NorFlashReset (
|
|
|
+ IN NOR_FLASH_INSTANCE *Instance
|
|
|
+ )
|
|
|
+{
|
|
|
+ // As there is no specific RESET to perform, ensure that the devices is in the default Read Array mode
|
|
|
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
|
|
|
+ return EFI_SUCCESS;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ Fixup internal data so that EFI can be call in virtual mode.
|
|
|
+ Call the passed in Child Notify event and convert any pointers in
|
|
|
+ lib to virtual mode.
|
|
|
+
|
|
|
+ @param[in] Event The Event that is being processed
|
|
|
+ @param[in] Context Event Context
|
|
|
+**/
|
|
|
+VOID
|
|
|
+EFIAPI
|
|
|
+NorFlashVirtualNotifyEvent (
|
|
|
+ IN EFI_EVENT Event,
|
|
|
+ IN VOID *Context
|
|
|
+ )
|
|
|
+{
|
|
|
+ UINTN Index;
|
|
|
+
|
|
|
+ for (Index = 0; Index < mNorFlashDeviceCount; Index++) {
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->DeviceBaseAddress);
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->RegionBaseAddress);
|
|
|
+
|
|
|
+ // Convert BlockIo protocol
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->BlockIoProtocol.FlushBlocks);
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->BlockIoProtocol.ReadBlocks);
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->BlockIoProtocol.Reset);
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->BlockIoProtocol.WriteBlocks);
|
|
|
+
|
|
|
+ // Convert Fvb
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.EraseBlocks);
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.GetAttributes);
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.GetBlockSize);
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.GetPhysicalAddress);
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.Read);
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.SetAttributes);
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.Write);
|
|
|
+
|
|
|
+ if (mNorFlashInstances[Index]->ShadowBuffer != NULL) {
|
|
|
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->ShadowBuffer);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return;
|
|
|
+}
|