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https://github.com/CloverHackyColor/CloverBootloader.git
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74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
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/** @file
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Internal interfaces specific to the QemuFwCfgLib instances in OvmfPkg.
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Copyright (C) 2016, Red Hat, Inc.
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Copyright (C) 2017, Advanced Micro Devices. All rights reserved
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __QEMU_FW_CFG_LIB_INTERNAL_H__
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#define __QEMU_FW_CFG_LIB_INTERNAL_H__
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/**
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Returns a boolean indicating if the firmware configuration interface is
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available for library-internal purposes.
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This function never changes fw_cfg state.
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@retval TRUE The interface is available internally.
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@retval FALSE The interface is not available internally.
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**/
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BOOLEAN
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InternalQemuFwCfgIsAvailable (
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VOID
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);
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/**
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Returns a boolean indicating whether QEMU provides the DMA-like access method
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for fw_cfg.
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@retval TRUE The DMA-like access method is available.
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@retval FALSE The DMA-like access method is unavailable.
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**/
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BOOLEAN
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InternalQemuFwCfgDmaIsAvailable (
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VOID
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);
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/**
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Transfer an array of bytes, or skip a number of bytes, using the DMA
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interface.
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@param[in] Size Size in bytes to transfer or skip.
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@param[in,out] Buffer Buffer to read data into or write data from. Ignored,
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and may be NULL, if Size is zero, or Control is
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FW_CFG_DMA_CTL_SKIP.
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@param[in] Control One of the following:
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FW_CFG_DMA_CTL_WRITE - write to fw_cfg from Buffer.
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FW_CFG_DMA_CTL_READ - read from fw_cfg into Buffer.
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FW_CFG_DMA_CTL_SKIP - skip bytes in fw_cfg.
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**/
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VOID
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InternalQemuFwCfgDmaBytes (
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IN UINT32 Size,
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IN OUT VOID *Buffer OPTIONAL,
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IN UINT32 Control
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);
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/**
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Check if it is Tdx guest
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@retval TRUE It is Tdx guest
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@retval FALSE It is not Tdx guest
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**/
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BOOLEAN
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QemuFwCfgIsTdxGuest (
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VOID
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);
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#endif
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