diff options
Diffstat (limited to 'MdePkg/Library/BaseFdtLib/FdtLib.c')
| -rw-r--r-- | MdePkg/Library/BaseFdtLib/FdtLib.c | 404 |
1 files changed, 404 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseFdtLib/FdtLib.c b/MdePkg/Library/BaseFdtLib/FdtLib.c new file mode 100644 index 0000000000..090b0b3fd4 --- /dev/null +++ b/MdePkg/Library/BaseFdtLib/FdtLib.c @@ -0,0 +1,404 @@ +/** @file
+ Flattened Device Tree Library.
+
+ Copyright (c) 2023, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <libfdt/libfdt/libfdt.h>
+
+/**
+ Convert UINT16 data of the FDT blob to little-endian
+
+ @param[in] Value The value to the blob data.
+
+ @return The value to be converted to little-endian.
+
+**/
+UINT16
+EFIAPI
+Fdt16ToCpu (
+ IN UINT16 Value
+ )
+{
+ return fdt16_to_cpu (Value);
+}
+
+/**
+ Convert UINT16 data to big-endian for aligned with the FDT blob
+
+ @param[in] Value The value to align with the FDT blob.
+
+ @return The value to be converted to big-endian.
+
+**/
+UINT16
+EFIAPI
+CpuToFdt16 (
+ IN UINT16 Value
+ )
+{
+ return cpu_to_fdt16 (Value);
+}
+
+/**
+ Convert UINT32 data of the FDT blob to little-endian
+
+ @param[in] Value The value to the blob data.
+
+ @return The value to be converted to little-endian.
+
+**/
+UINT32
+EFIAPI
+Fdt32ToCpu (
+ IN UINT32 Value
+ )
+{
+ return fdt32_to_cpu (Value);
+}
+
+/**
+ Convert UINT32 data to big-endian for aligned with the FDT blob
+
+ @param[in] Value The value to align with the FDT blob.
+
+ @return The value to be converted to big-endian.
+
+**/
+UINT32
+EFIAPI
+CpuToFdt32 (
+ IN UINT32 Value
+ )
+{
+ return cpu_to_fdt32 (Value);
+}
+
+/**
+ Convert UINT64 data of the FDT blob to little-endian
+
+ @param[in] Value The value to the blob data.
+
+ @return The value to be converted to little-endian.
+
+**/
+UINT64
+EFIAPI
+Fdt64ToCpu (
+ IN UINT64 Value
+ )
+{
+ return fdt64_to_cpu (Value);
+}
+
+/**
+ Convert UINT64 data to big-endian for aligned with the FDT blob
+
+ @param[in] Value The value to align with the FDT blob.
+
+ @return The value to be converted to big-endian.
+
+**/
+UINT64
+EFIAPI
+CpuToFdt64 (
+ IN UINT64 Value
+ )
+{
+ return cpu_to_fdt64 (Value);
+}
+
+/**
+ Verify the header of the Flattened Device Tree
+
+ @param[in] Fdt The pointer to FDT blob.
+
+ @return Zero for successfully, otherwise failed.
+
+**/
+INT32
+EFIAPI
+FdtCheckHeader (
+ IN CONST VOID *Fdt
+ )
+{
+ return fdt_check_header (Fdt);
+}
+
+/**
+ Create a empty Flattened Device Tree.
+
+ @param[in] Buffer The pointer to allocate a pool for FDT blob.
+ @param[in] BufferSize The BufferSize to the pool size.
+
+ @return Zero for successfully, otherwise failed.
+
+**/
+INT32
+EFIAPI
+FdtCreateEmptyTree (
+ IN VOID *Buffer,
+ IN UINT32 BufferSize
+ )
+{
+ return fdt_create_empty_tree (Buffer, (int)BufferSize);
+}
+
+/**
+ Returns a offset of next node from the given node.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] Offset The offset to previous node.
+ @param[in] Depth The depth to the level of tree hierarchy.
+
+ @return The offset to next node offset.
+
+**/
+INT32
+EFIAPI
+FdtNextNode (
+ IN CONST VOID *Fdt,
+ IN INT32 Offset,
+ IN INT32 *Depth
+ )
+{
+ return fdt_next_node (Fdt, Offset, Depth);
+}
+
+/**
+ Returns a offset of first node under the given node.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] Offset The offset to previous node.
+
+ @return The offset to next node offset.
+
+**/
+INT32
+EFIAPI
+FdtFirstSubnode (
+ IN CONST VOID *Fdt,
+ IN INT32 Offset
+ )
+{
+ return fdt_first_subnode (Fdt, Offset);
+}
+
+/**
+ Returns a offset of next node from the given node.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] Offset The offset to previous node.
+
+ @return The offset to next node offset.
+
+**/
+INT32
+EFIAPI
+FdtNextSubnode (
+ IN CONST VOID *Fdt,
+ IN INT32 Offset
+ )
+{
+ return fdt_next_subnode (Fdt, Offset);
+}
+
+/**
+ Returns a offset of first node which includes the given name.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] ParentOffset The offset to the node which start find under.
+ @param[in] Name The name to search the node with the name.
+ @param[in] NameLength The length of the name to check only.
+
+ @return The offset to node offset with given node name.
+
+**/
+INT32
+EFIAPI
+FdtSubnodeOffsetNameLen (
+ IN CONST VOID *Fdt,
+ IN INT32 ParentOffset,
+ IN CONST CHAR8 *Name,
+ IN INT32 NameLength
+ )
+{
+ return fdt_subnode_offset_namelen (Fdt, ParentOffset, Name, NameLength);
+}
+
+/**
+ Returns a offset of first node which includes the given property name and value.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] StartOffset The offset to the starting node to find.
+ @param[in] PropertyName The property name to search the node including the named property.
+ @param[in] PropertyValue The property value (big-endian) to check the same property value.
+ @param[in] PropertyLength The length of the value in PropertValue.
+
+ @return The offset to node offset with given property.
+
+**/
+INT32
+EFIAPI
+FdtNodeOffsetByPropValue (
+ IN CONST VOID *Fdt,
+ IN INT32 StartOffset,
+ IN CONST CHAR8 *PropertyName,
+ IN CONST VOID *PropertyValue,
+ IN INT32 PropertyLength
+ )
+{
+ return fdt_node_offset_by_prop_value (Fdt, StartOffset, PropertyName, PropertyValue, PropertyLength);
+}
+
+/**
+ Returns a property with the given name from the given node.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] NodeOffset The offset to the given node.
+ @param[in] Name The name to the property which need be searched
+ @param[in] Length The length to the size of the property found.
+
+ @return The property to the structure of the found property. Since the data
+ come from FDT blob, it's encoding with big-endian.
+
+**/
+CONST struct fdt_property *
+EFIAPI
+FdtGetProperty (
+ IN CONST VOID *Fdt,
+ IN INT32 NodeOffset,
+ IN CONST CHAR8 *Name,
+ IN INT32 *Length
+ )
+{
+ return fdt_get_property (Fdt, NodeOffset, Name, Length);
+}
+
+/**
+ Returns a offset of first property in the given node.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] NodeOffset The offset to the node which need be searched.
+
+ @return The offset to first property offset in the given node.
+
+**/
+INT32
+EFIAPI
+FdtFirstPropertyOffset (
+ IN CONST VOID *Fdt,
+ IN INT32 NodeOffset
+ )
+{
+ return fdt_first_property_offset (Fdt, NodeOffset);
+}
+
+/**
+ Returns a offset of next property from the given property.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] Offset The offset to previous property.
+
+ @return The offset to next property offset.
+
+**/
+INT32
+EFIAPI
+FdtNextPropertyOffset (
+ IN CONST VOID *Fdt,
+ IN INT32 Offset
+ )
+{
+ return fdt_next_property_offset (Fdt, Offset);
+}
+
+/**
+ Returns a property from the given offset of the property.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] Offset The offset to the given offset of the property.
+ @param[in] Length The length to the size of the property found.
+
+ @return The property to the structure of the given property offset.
+
+**/
+CONST struct fdt_property *
+EFIAPI
+FdtGetPropertyByOffset (
+ IN CONST VOID *Fdt,
+ IN INT32 Offset,
+ IN INT32 *Length
+ )
+{
+ return fdt_get_property_by_offset (Fdt, Offset, Length);
+}
+
+/**
+ Returns a string by the given string offset.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] StrOffset The offset to the location in the strings block of FDT.
+ @param[in] Length The length to the size of string which need be retrieved.
+
+ @return The string to the given string offset.
+
+**/
+CONST CHAR8 *
+EFIAPI
+FdtGetString (
+ IN CONST VOID *Fdt,
+ IN INT32 StrOffset,
+ IN INT32 *Length OPTIONAL
+ )
+{
+ return fdt_get_string (Fdt, StrOffset, Length);
+}
+
+/**
+ Add a new node to the FDT.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] ParentOffset The offset to the node offset which want to add in.
+ @param[in] Name The name to name the node.
+
+ @return The offset to the new node.
+
+**/
+INT32
+EFIAPI
+FdtAddSubnode (
+ IN VOID *Fdt,
+ IN INT32 ParentOffset,
+ IN CONST CHAR8 *Name
+ )
+{
+ return fdt_add_subnode (Fdt, ParentOffset, Name);
+}
+
+/**
+ Add or modify a property in the given node.
+
+ @param[in] Fdt The pointer to FDT blob.
+ @param[in] NodeOffset The offset to the node offset which want to add in.
+ @param[in] Name The name to name the property.
+ @param[in] Value The value (big-endian) to the property value.
+ @param[in] Length The length to the size of the property.
+
+ @return Zero for successfully, otherwise failed.
+
+**/
+INT32
+EFIAPI
+FdtSetProp (
+ IN VOID *Fdt,
+ IN INT32 NodeOffset,
+ IN CONST CHAR8 *Name,
+ IN CONST VOID *Value,
+ IN UINT32 Length
+ )
+{
+ return fdt_setprop (Fdt, NodeOffset, Name, Value, (int)Length);
+}
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