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-rw-r--r--OvmfPkg/Include/Library/QemuFwCfgLib.h238
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diff --git a/OvmfPkg/Include/Library/QemuFwCfgLib.h b/OvmfPkg/Include/Library/QemuFwCfgLib.h
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--- a/OvmfPkg/Include/Library/QemuFwCfgLib.h
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-/** @file
- QEMU/KVM Firmware Configuration access
-
- Copyright (c) 2011 - 2013, Intel Corporation. All rights reserved.<BR>
- Copyright (C) 2013, Red Hat, Inc.
-
- 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.
-
-**/
-
-#ifndef __FW_CFG_LIB__
-#define __FW_CFG_LIB__
-
-//
-// The size, in bytes, of names of firmware configuration files, including at
-// least one terminating NUL byte.
-//
-#define QEMU_FW_CFG_FNAME_SIZE 56
-
-typedef enum {
- QemuFwCfgItemSignature = 0x0000,
- QemuFwCfgItemInterfaceVersion = 0x0001,
- QemuFwCfgItemSystemUuid = 0x0002,
- QemuFwCfgItemRamSize = 0x0003,
- QemuFwCfgItemGraphicsEnabled = 0x0004,
- QemuFwCfgItemSmpCpuCount = 0x0005,
- QemuFwCfgItemMachineId = 0x0006,
- QemuFwCfgItemKernelAddress = 0x0007,
- QemuFwCfgItemKernelSize = 0x0008,
- QemuFwCfgItemKernelCommandLine = 0x0009,
- QemuFwCfgItemInitrdAddress = 0x000a,
- QemuFwCfgItemInitrdSize = 0x000b,
- QemuFwCfgItemBootDevice = 0x000c,
- QemuFwCfgItemNumaData = 0x000d,
- QemuFwCfgItemBootMenu = 0x000e,
- QemuFwCfgItemMaximumCpuCount = 0x000f,
- QemuFwCfgItemKernelEntry = 0x0010,
- QemuFwCfgItemKernelData = 0x0011,
- QemuFwCfgItemInitrdData = 0x0012,
- QemuFwCfgItemCommandLineAddress = 0x0013,
- QemuFwCfgItemCommandLineSize = 0x0014,
- QemuFwCfgItemCommandLineData = 0x0015,
- QemuFwCfgItemKernelSetupAddress = 0x0016,
- QemuFwCfgItemKernelSetupSize = 0x0017,
- QemuFwCfgItemKernelSetupData = 0x0018,
- QemuFwCfgItemFileDir = 0x0019,
-
- QemuFwCfgItemX86AcpiTables = 0x8000,
- QemuFwCfgItemX86SmbiosTables = 0x8001,
- QemuFwCfgItemX86Irq0Override = 0x8002,
- QemuFwCfgItemX86E820Table = 0x8003,
- QemuFwCfgItemX86HpetData = 0x8004,
-
-} FIRMWARE_CONFIG_ITEM;
-
-
-/**
- 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
- );
-
-
-/**
- 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
- );
-
-
-/**
- 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 OPTIONAL
- );
-
-
-/**
- Writes 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
- );
-
-
-/**
- Reads a UINT8 firmware configuration value
-
- @return Value of Firmware Configuration item read
-
-**/
-UINT8
-EFIAPI
-QemuFwCfgRead8 (
- VOID
- );
-
-
-/**
- Reads a UINT16 firmware configuration value
-
- @return Value of Firmware Configuration item read
-
-**/
-UINT16
-EFIAPI
-QemuFwCfgRead16 (
- VOID
- );
-
-
-/**
- Reads a UINT32 firmware configuration value
-
- @return Value of Firmware Configuration item read
-
-**/
-UINT32
-EFIAPI
-QemuFwCfgRead32 (
- VOID
- );
-
-
-/**
- Reads a UINT64 firmware configuration value
-
- @return Value of Firmware Configuration item read
-
-**/
-UINT64
-EFIAPI
-QemuFwCfgRead64 (
- VOID
- );
-
-
-/**
- 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.
-
- @return RETURN_SUCCESS If file is found.
- RETURN_NOT_FOUND If file is not found.
- RETURN_UNSUPPORTED If firmware configuration is unavailable.
-
-**/
-RETURN_STATUS
-EFIAPI
-QemuFwCfgFindFile (
- IN CONST CHAR8 *Name,
- OUT FIRMWARE_CONFIG_ITEM *Item,
- OUT UINTN *Size
- );
-
-
-/**
- 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
- );
-
-
-/**
- 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
- );
-
-#endif
-