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| author | Rebecca Cran <rebecca@bsdio.com> | 2020-05-03 17:09:10 -0600 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-05-05 16:57:57 +0000 |
| commit | 245bdd2cb94beef807ff12263b6060d6fdb40c9a (patch) | |
| tree | 0e7485c26a081108fd726884faedbcc22474bb8b /OvmfPkg/Library | |
| parent | de15e7c2651ada46cc649c5b3c8c0c145354ac04 (diff) | |
| download | edk2-245bdd2cb94beef807ff12263b6060d6fdb40c9a.tar.gz edk2-245bdd2cb94beef807ff12263b6060d6fdb40c9a.tar.bz2 edk2-245bdd2cb94beef807ff12263b6060d6fdb40c9a.zip | |
OvmfPkg: Add QemuFwCfgLibNull
Add a null implementation library for QemuFwCfgLib, in order to
support building PciHostBridgeLib for bhyve.
Signed-off-by: Rebecca Cran <rebecca@bsdio.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200503230910.26783-1-rebecca@bsdio.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'OvmfPkg/Library')
| -rw-r--r-- | OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibNull.inf | 30 | ||||
| -rw-r--r-- | OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgNull.c | 209 |
2 files changed, 239 insertions, 0 deletions
diff --git a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibNull.inf b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibNull.inf new file mode 100644 index 0000000000..e5715a6433 --- /dev/null +++ b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibNull.inf @@ -0,0 +1,30 @@ +## @file
+#
+# Null implementation of the fw_cfg library.
+#
+# Copyright (C) 2020, Rebecca Cran <rebecca@bsdio.com>
+# Copyright (C) 2013, Red Hat, Inc.
+# Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = QemuFwCfgLibNull
+ FILE_GUID = B9D1A1F2-01E2-4732-982D-C7F9ED51AC6B
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = QemuFwCfgLib
+
+[Sources]
+ QemuFwCfgNull.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+ DebugLib
diff --git a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgNull.c b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgNull.c new file mode 100644 index 0000000000..edd97db49d --- /dev/null +++ b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgNull.c @@ -0,0 +1,209 @@ +/** @file
+
+ Null implementation of the fw_cfg library.
+
+ Copyright (C) 2020, Rebecca Cran <rebecca@bsdio.com>
+ Copyright (C) 2013, Red Hat, Inc.
+ Copyright (c) 2011 - 2013, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2017, Advanced Micro Devices. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/DebugLib.h>
+#include <Library/QemuFwCfgLib.h>
+
+/**
+ 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 FALSE;
+}
+
+
+/**
+ 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
+ )
+{
+ ASSERT (FALSE);
+}
+
+
+/**
+ 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
+ )
+{
+ ASSERT (FALSE);
+}
+
+
+/**
+ 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
+ )
+{
+ ASSERT (FALSE);
+}
+
+
+/**
+ Skip bytes in the firmware configuration item.
+
+ Increase the offset of the firmware configuration item without transferring
+ bytes between the item and a caller-provided buffer. Subsequent read, write
+ or skip operations will commence at the increased offset.
+
+ @param[in] Size Number of bytes to skip.
+**/
+VOID
+EFIAPI
+QemuFwCfgSkipBytes (
+ IN UINTN Size
+ )
+{
+ ASSERT (FALSE);
+}
+
+
+/**
+ Reads a UINT8 firmware configuration value
+
+ @return Value of Firmware Configuration item read
+
+**/
+UINT8
+EFIAPI
+QemuFwCfgRead8 (
+ VOID
+ )
+{
+ ASSERT (FALSE);
+ return 0;
+}
+
+
+/**
+ Reads a UINT16 firmware configuration value
+
+ @return Value of Firmware Configuration item read
+
+**/
+UINT16
+EFIAPI
+QemuFwCfgRead16 (
+ VOID
+ )
+{
+ ASSERT (FALSE);
+ return 0;
+}
+
+
+/**
+ Reads a UINT32 firmware configuration value
+
+ @return Value of Firmware Configuration item read
+
+**/
+UINT32
+EFIAPI
+QemuFwCfgRead32 (
+ VOID
+ )
+{
+ ASSERT (FALSE);
+ return 0;
+}
+
+
+/**
+ Reads a UINT64 firmware configuration value
+
+ @return Value of Firmware Configuration item read
+
+**/
+UINT64
+EFIAPI
+QemuFwCfgRead64 (
+ VOID
+ )
+{
+ ASSERT (FALSE);
+ return 0;
+}
+
+
+/**
+ 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
+ )
+{
+ return RETURN_UNSUPPORTED;
+}
+
|