diff options
Diffstat (limited to 'OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c')
| -rw-r--r-- | OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c deleted file mode 100644 index a96e0e5275..0000000000 --- a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/QemuFlash.c +++ /dev/null @@ -1,265 +0,0 @@ -/** @file
- OVMF support for QEMU system firmware flash device
-
- Copyright (c) 2009 - 2013, Intel Corporation. All rights reserved.<BR>
- This program and the accompanying materials
- are licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-#include "PiDxe.h"
-#include <Library/DebugLib.h>
-#include <Library/BaseMemoryLib.h>
-#include <Library/PcdLib.h>
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiRuntimeLib.h>
-#include <Guid/EventGroup.h>
-
-#include "QemuFlash.h"
-
-#define WRITE_BYTE_CMD 0x10
-#define BLOCK_ERASE_CMD 0x20
-#define CLEAR_STATUS_CMD 0x50
-#define READ_STATUS_CMD 0x70
-#define READ_DEVID_CMD 0x90
-#define BLOCK_ERASE_CONFIRM_CMD 0xd0
-#define READ_ARRAY_CMD 0xff
-
-#define CLEARED_ARRAY_STATUS 0x00
-
-
-STATIC UINT8 *mFlashBase = NULL;
-STATIC UINTN mFdBlockSize = 0;
-STATIC UINTN mFdBlockCount = 0;
-
-
-VOID
-QemuFlashConvertPointers (
- VOID
- )
-{
- EfiConvertPointer (0x0, (VOID **) &mFlashBase);
-}
-
-
-STATIC
-volatile UINT8*
-QemuFlashPtr (
- IN EFI_LBA Lba,
- IN UINTN Offset
- )
-{
- return mFlashBase + ((UINTN)Lba * mFdBlockSize) + Offset;
-}
-
-
-/**
- Determines if the QEMU flash memory device is present.
-
- @retval FALSE The QEMU flash device is not present.
- @retval TRUE The QEMU flash device is present.
-
-**/
-STATIC
-BOOLEAN
-QemuFlashDetected (
- VOID
- )
-{
- BOOLEAN FlashDetected;
- volatile UINT8 *Ptr;
-
- UINTN Offset;
- UINT8 OriginalUint8;
- UINT8 ProbeUint8;
-
- FlashDetected = FALSE;
- Ptr = QemuFlashPtr (0, 0);
-
- for (Offset = 0; Offset < mFdBlockSize; Offset++) {
- Ptr = QemuFlashPtr (0, Offset);
- ProbeUint8 = *Ptr;
- if (ProbeUint8 != CLEAR_STATUS_CMD &&
- ProbeUint8 != READ_STATUS_CMD &&
- ProbeUint8 != CLEARED_ARRAY_STATUS) {
- break;
- }
- }
-
- if (Offset >= mFdBlockSize) {
- DEBUG ((EFI_D_INFO, "QEMU Flash: Failed to find probe location\n"));
- return FALSE;
- }
-
- DEBUG ((EFI_D_INFO, "QEMU Flash: Attempting flash detection at %p\n", Ptr));
-
- OriginalUint8 = *Ptr;
- *Ptr = CLEAR_STATUS_CMD;
- ProbeUint8 = *Ptr;
- if (OriginalUint8 != CLEAR_STATUS_CMD &&
- ProbeUint8 == CLEAR_STATUS_CMD) {
- DEBUG ((EFI_D_INFO, "QemuFlashDetected => FD behaves as RAM\n"));
- *Ptr = OriginalUint8;
- } else {
- *Ptr = READ_STATUS_CMD;
- ProbeUint8 = *Ptr;
- if (ProbeUint8 == OriginalUint8) {
- DEBUG ((EFI_D_INFO, "QemuFlashDetected => FD behaves as ROM\n"));
- } else if (ProbeUint8 == READ_STATUS_CMD) {
- DEBUG ((EFI_D_INFO, "QemuFlashDetected => FD behaves as RAM\n"));
- *Ptr = OriginalUint8;
- } else if (ProbeUint8 == CLEARED_ARRAY_STATUS) {
- DEBUG ((EFI_D_INFO, "QemuFlashDetected => FD behaves as FLASH\n"));
- FlashDetected = TRUE;
- *Ptr = READ_ARRAY_CMD;
- }
- }
-
- DEBUG ((EFI_D_INFO, "QemuFlashDetected => %a\n",
- FlashDetected ? "Yes" : "No"));
- return FlashDetected;
-}
-
-
-/**
- Read from QEMU Flash
-
- @param[in] Lba The starting logical block index to read from.
- @param[in] Offset Offset into the block at which to begin reading.
- @param[in] NumBytes On input, indicates the requested read size. On
- output, indicates the actual number of bytes read
- @param[in] Buffer Pointer to the buffer to read into.
-
-**/
-EFI_STATUS
-QemuFlashRead (
- IN EFI_LBA Lba,
- IN UINTN Offset,
- IN UINTN *NumBytes,
- IN UINT8 *Buffer
- )
-{
- UINT8 *Ptr;
-
- //
- // Only write to the first 64k. We don't bother saving the FTW Spare
- // block into the flash memory.
- //
- if (Lba >= mFdBlockCount) {
- return EFI_INVALID_PARAMETER;
- }
-
- //
- // Get flash address
- //
- Ptr = (UINT8*) QemuFlashPtr (Lba, Offset);
-
- CopyMem (Buffer, Ptr, *NumBytes);
-
- return EFI_SUCCESS;
-}
-
-
-/**
- Write to QEMU Flash
-
- @param[in] Lba The starting logical block index to write to.
- @param[in] Offset Offset into the block at which to begin writing.
- @param[in] NumBytes On input, indicates the requested write size. On
- output, indicates the actual number of bytes written
- @param[in] Buffer Pointer to the data to write.
-
-**/
-EFI_STATUS
-QemuFlashWrite (
- IN EFI_LBA Lba,
- IN UINTN Offset,
- IN UINTN *NumBytes,
- IN UINT8 *Buffer
- )
-{
- volatile UINT8 *Ptr;
- UINTN Loop;
-
- //
- // Only write to the first 64k. We don't bother saving the FTW Spare
- // block into the flash memory.
- //
- if (Lba >= mFdBlockCount) {
- return EFI_INVALID_PARAMETER;
- }
-
- //
- // Program flash
- //
- Ptr = QemuFlashPtr (Lba, Offset);
- for (Loop = 0; Loop < *NumBytes; Loop++) {
- *Ptr = WRITE_BYTE_CMD;
- *Ptr = Buffer[Loop];
- Ptr++;
- }
-
- //
- // Restore flash to read mode
- //
- if (*NumBytes > 0) {
- *(Ptr - 1) = READ_ARRAY_CMD;
- }
-
- return EFI_SUCCESS;
-}
-
-
-/**
- Erase a QEMU Flash block
-
- @param Lba The logical block index to erase.
-
-**/
-EFI_STATUS
-QemuFlashEraseBlock (
- IN EFI_LBA Lba
- )
-{
- volatile UINT8 *Ptr;
-
- if (Lba >= mFdBlockCount) {
- return EFI_INVALID_PARAMETER;
- }
-
- Ptr = QemuFlashPtr (Lba, 0);
- *Ptr = BLOCK_ERASE_CMD;
- *Ptr = BLOCK_ERASE_CONFIRM_CMD;
- return EFI_SUCCESS;
-}
-
-
-/**
- Initializes QEMU flash memory support
-
- @retval EFI_WRITE_PROTECTED The QEMU flash device is not present.
- @retval EFI_SUCCESS The QEMU flash device is supported.
-
-**/
-EFI_STATUS
-QemuFlashInitialize (
- VOID
- )
-{
- mFlashBase = (UINT8*)(UINTN) PcdGet32 (PcdOvmfFdBaseAddress);
- mFdBlockSize = PcdGet32 (PcdOvmfFirmwareBlockSize);
- ASSERT(PcdGet32 (PcdOvmfFirmwareFdSize) % mFdBlockSize == 0);
- mFdBlockCount = PcdGet32 (PcdOvmfFirmwareFdSize) / mFdBlockSize;
-
- if (!QemuFlashDetected ()) {
- return EFI_WRITE_PROTECTED;
- }
-
- return EFI_SUCCESS;
-}
-
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