diff options
Diffstat (limited to 'ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c')
| -rw-r--r-- | ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c | 358 |
1 files changed, 0 insertions, 358 deletions
diff --git a/ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c b/ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c deleted file mode 100644 index c62eee3be8..0000000000 --- a/ArmVirtPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c +++ /dev/null @@ -1,358 +0,0 @@ -/** @file
-
- Stateful and implicitly initialized fw_cfg library implementation.
-
- Copyright (C) 2013 - 2014, Red Hat, Inc.
- Copyright (c) 2011 - 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 <Library/BaseLib.h>
-#include <Library/BaseMemoryLib.h>
-#include <Library/IoLib.h>
-#include <Library/PcdLib.h>
-#include <Library/QemuFwCfgLib.h>
-
-STATIC UINTN mFwCfgSelectorAddress;
-STATIC UINTN mFwCfgDataAddress;
-
-
-/**
- Returns a boolean indicating if the firmware configuration interface is
- available for library-internal purposes.
-
- This function never changes fw_cfg state.
-
- @retval TRUE The interface is available internally.
- @retval FALSE The interface is not available internally.
-**/
-BOOLEAN
-EFIAPI
-InternalQemuFwCfgIsAvailable (
- VOID
- )
-{
- return (BOOLEAN)(mFwCfgSelectorAddress != 0 && mFwCfgDataAddress != 0);
-}
-
-
-/**
- Returns a boolean indicating if the firmware configuration interface
- is available or not.
-
- This function may change fw_cfg state.
-
- @retval TRUE The interface is available
- @retval FALSE The interface is not available
-
-**/
-BOOLEAN
-EFIAPI
-QemuFwCfgIsAvailable (
- VOID
- )
-{
- return InternalQemuFwCfgIsAvailable ();
-}
-
-
-RETURN_STATUS
-EFIAPI
-QemuFwCfgInitialize (
- VOID
- )
-{
- mFwCfgSelectorAddress = (UINTN)PcdGet64 (PcdFwCfgSelectorAddress);
- mFwCfgDataAddress = (UINTN)PcdGet64 (PcdFwCfgDataAddress);
-
- if (InternalQemuFwCfgIsAvailable ()) {
- UINT32 Signature;
-
- QemuFwCfgSelectItem (QemuFwCfgItemSignature);
- Signature = QemuFwCfgRead32 ();
- if (Signature != SIGNATURE_32 ('Q', 'E', 'M', 'U')) {
- mFwCfgSelectorAddress = 0;
- mFwCfgDataAddress = 0;
- }
- }
- return RETURN_SUCCESS;
-}
-
-
-/**
- Selects a firmware configuration item for reading.
-
- Following this call, any data read from this item will start from the
- beginning of the configuration item's data.
-
- @param[in] QemuFwCfgItem Firmware Configuration item to read
-
-**/
-VOID
-EFIAPI
-QemuFwCfgSelectItem (
- IN FIRMWARE_CONFIG_ITEM QemuFwCfgItem
- )
-{
- if (InternalQemuFwCfgIsAvailable ()) {
- MmioWrite16 (mFwCfgSelectorAddress, SwapBytes16 ((UINT16)QemuFwCfgItem));
- }
-}
-
-
-/**
- Reads firmware configuration bytes into a buffer
-
- @param[in] Size Size in bytes to read
- @param[in] Buffer Buffer to store data into (OPTIONAL if Size is 0)
-
-**/
-STATIC
-VOID
-EFIAPI
-InternalQemuFwCfgReadBytes (
- IN UINTN Size,
- IN VOID *Buffer OPTIONAL
- )
-{
- UINTN Left;
- UINT8 *Ptr;
- UINT8 *End;
-
-#ifdef MDE_CPU_AARCH64
- Left = Size & 7;
-#else
- Left = Size & 3;
-#endif
-
- Size -= Left;
- Ptr = Buffer;
- End = Ptr + Size;
-
-#ifdef MDE_CPU_AARCH64
- while (Ptr < End) {
- *(UINT64 *)Ptr = MmioRead64 (mFwCfgDataAddress);
- Ptr += 8;
- }
- if (Left & 4) {
- *(UINT32 *)Ptr = MmioRead32 (mFwCfgDataAddress);
- Ptr += 4;
- }
-#else
- while (Ptr < End) {
- *(UINT32 *)Ptr = MmioRead32 (mFwCfgDataAddress);
- Ptr += 4;
- }
-#endif
-
- if (Left & 2) {
- *(UINT16 *)Ptr = MmioRead16 (mFwCfgDataAddress);
- Ptr += 2;
- }
- if (Left & 1) {
- *Ptr = MmioRead8 (mFwCfgDataAddress);
- }
-}
-
-
-/**
- Reads firmware configuration bytes into a buffer
-
- If called multiple times, then the data read will continue at the offset of
- the firmware configuration item where the previous read ended.
-
- @param[in] Size Size in bytes to read
- @param[in] Buffer Buffer to store data into
-
-**/
-VOID
-EFIAPI
-QemuFwCfgReadBytes (
- IN UINTN Size,
- IN VOID *Buffer
- )
-{
- if (InternalQemuFwCfgIsAvailable ()) {
- InternalQemuFwCfgReadBytes (Size, Buffer);
- } else {
- ZeroMem (Buffer, Size);
- }
-}
-
-/**
- Write firmware configuration bytes from a buffer
-
- If called multiple times, then the data written will continue at the offset
- of the firmware configuration item where the previous write ended.
-
- @param[in] Size Size in bytes to write
- @param[in] Buffer Buffer to read data from
-
-**/
-VOID
-EFIAPI
-QemuFwCfgWriteBytes (
- IN UINTN Size,
- IN VOID *Buffer
- )
-{
- if (InternalQemuFwCfgIsAvailable ()) {
- UINTN Idx;
-
- for (Idx = 0; Idx < Size; ++Idx) {
- MmioWrite8 (mFwCfgDataAddress, ((UINT8 *)Buffer)[Idx]);
- }
- }
-}
-
-
-/**
- Reads a UINT8 firmware configuration value
-
- @return Value of Firmware Configuration item read
-
-**/
-UINT8
-EFIAPI
-QemuFwCfgRead8 (
- VOID
- )
-{
- UINT8 Result;
-
- QemuFwCfgReadBytes (sizeof Result, &Result);
- return Result;
-}
-
-
-/**
- Reads a UINT16 firmware configuration value
-
- @return Value of Firmware Configuration item read
-
-**/
-UINT16
-EFIAPI
-QemuFwCfgRead16 (
- VOID
- )
-{
- UINT16 Result;
-
- QemuFwCfgReadBytes (sizeof Result, &Result);
- return Result;
-}
-
-
-/**
- Reads a UINT32 firmware configuration value
-
- @return Value of Firmware Configuration item read
-
-**/
-UINT32
-EFIAPI
-QemuFwCfgRead32 (
- VOID
- )
-{
- UINT32 Result;
-
- QemuFwCfgReadBytes (sizeof Result, &Result);
- return Result;
-}
-
-
-/**
- Reads a UINT64 firmware configuration value
-
- @return Value of Firmware Configuration item read
-
-**/
-UINT64
-EFIAPI
-QemuFwCfgRead64 (
- VOID
- )
-{
- UINT64 Result;
-
- QemuFwCfgReadBytes (sizeof Result, &Result);
- return Result;
-}
-
-
-/**
- Find the configuration item corresponding to the firmware configuration file.
-
- @param[in] Name Name of file to look up.
- @param[out] Item Configuration item corresponding to the file, to be passed
- to QemuFwCfgSelectItem ().
- @param[out] Size Number of bytes in the file.
-
- @retval RETURN_SUCCESS If file is found.
- @retval RETURN_NOT_FOUND If file is not found.
- @retval RETURN_UNSUPPORTED If firmware configuration is unavailable.
-
-**/
-RETURN_STATUS
-EFIAPI
-QemuFwCfgFindFile (
- IN CONST CHAR8 *Name,
- OUT FIRMWARE_CONFIG_ITEM *Item,
- OUT UINTN *Size
- )
-{
- UINT32 Count;
- UINT32 Idx;
-
- if (!InternalQemuFwCfgIsAvailable ()) {
- return RETURN_UNSUPPORTED;
- }
-
- QemuFwCfgSelectItem (QemuFwCfgItemFileDir);
- Count = SwapBytes32 (QemuFwCfgRead32 ());
-
- for (Idx = 0; Idx < Count; ++Idx) {
- UINT32 FileSize;
- UINT16 FileSelect;
- CHAR8 FName[QEMU_FW_CFG_FNAME_SIZE];
-
- FileSize = QemuFwCfgRead32 ();
- FileSelect = QemuFwCfgRead16 ();
- QemuFwCfgRead16 (); // skip the field called "reserved"
- InternalQemuFwCfgReadBytes (sizeof (FName), FName);
-
- if (AsciiStrCmp (Name, FName) == 0) {
- *Item = (FIRMWARE_CONFIG_ITEM) SwapBytes16 (FileSelect);
- *Size = SwapBytes32 (FileSize);
- return RETURN_SUCCESS;
- }
- }
-
- return RETURN_NOT_FOUND;
-}
-
-
-/**
- Determine if S3 support is explicitly enabled.
-
- @retval TRUE if S3 support is explicitly enabled.
- FALSE otherwise. This includes unavailability of the firmware
- configuration interface.
-**/
-BOOLEAN
-EFIAPI
-QemuFwCfgS3Enabled (
- VOID
- )
-{
- return FALSE;
-}
|