mirror of https://github.com/acidanthera/audk.git
823 lines
18 KiB
C
823 lines
18 KiB
C
/** @file
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Flattened Device Tree Library.
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Copyright (c) 2023, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <libfdt/libfdt/libfdt.h>
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#include <Library/FdtLib.h>
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#include <Uefi/UefiBaseType.h>
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/**
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Convert UINT16 data of the FDT blob to little-endian
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@param[in] Value The value to the blob data.
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@return The value to be converted to little-endian.
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**/
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UINT16
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EFIAPI
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Fdt16ToCpu (
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IN UINT16 Value
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)
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{
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return fdt16_to_cpu (Value);
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}
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/**
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Convert UINT16 data to big-endian for aligned with the FDT blob
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@param[in] Value The value to align with the FDT blob.
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@return The value to be converted to big-endian.
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**/
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UINT16
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EFIAPI
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CpuToFdt16 (
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IN UINT16 Value
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)
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{
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return cpu_to_fdt16 (Value);
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}
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/**
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Convert UINT32 data of the FDT blob to little-endian
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@param[in] Value The value to the blob data.
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@return The value to be converted to little-endian.
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**/
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UINT32
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EFIAPI
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Fdt32ToCpu (
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IN UINT32 Value
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)
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{
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return fdt32_to_cpu (Value);
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}
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/**
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Convert UINT32 data to big-endian for aligned with the FDT blob
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@param[in] Value The value to align with the FDT blob.
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@return The value to be converted to big-endian.
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**/
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UINT32
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EFIAPI
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CpuToFdt32 (
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IN UINT32 Value
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)
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{
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return cpu_to_fdt32 (Value);
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}
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/**
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Convert UINT64 data of the FDT blob to little-endian
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@param[in] Value The value to the blob data.
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@return The value to be converted to little-endian.
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**/
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UINT64
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EFIAPI
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Fdt64ToCpu (
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IN UINT64 Value
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)
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{
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return fdt64_to_cpu (Value);
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}
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/**
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Convert UINT64 data to big-endian for aligned with the FDT blob
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@param[in] Value The value to align with the FDT blob.
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@return The value to be converted to big-endian.
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**/
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UINT64
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EFIAPI
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CpuToFdt64 (
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IN UINT64 Value
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)
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{
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return cpu_to_fdt64 (Value);
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}
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/**
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Verify the header of the Flattened Device Tree
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@param[in] Fdt The pointer to FDT blob.
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@return Zero for successfully, otherwise failed.
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**/
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INT32
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EFIAPI
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FdtCheckHeader (
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IN CONST VOID *Fdt
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)
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{
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return fdt_check_header (Fdt);
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}
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/**
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Create a empty Flattened Device Tree.
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@param[in] Buffer The pointer to allocate a pool for FDT blob.
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@param[in] BufferSize The BufferSize to the pool size.
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@return Zero for successfully, otherwise failed.
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**/
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INT32
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EFIAPI
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FdtCreateEmptyTree (
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IN VOID *Buffer,
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IN UINT32 BufferSize
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)
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{
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return fdt_create_empty_tree (Buffer, (int)BufferSize);
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}
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/**
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Unpack FDT blob into new buffer
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@param[in] Fdt The pointer to FDT blob.
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@param[out] Buffer Pointer to destination buffer.
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@param[in] BufferSize The size of destination buffer.
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@return Zero for successfully, otherwise failed.
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**/
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INT32
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EFIAPI
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FdtOpenInto (
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IN CONST VOID *Fdt,
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OUT VOID *Buffer,
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IN INT32 BufferSize
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)
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{
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return fdt_open_into (Fdt, Buffer, BufferSize);
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}
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/**
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Pack FDT blob in place.
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@param[in][out] Fdt The pointer to FDT blob.
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@return Zero.
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**/
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INT32
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EFIAPI
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FdtPack (
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IN OUT VOID *Fdt
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)
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{
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return fdt_pack (Fdt);
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}
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/**
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Returns a pointer to the node at a given offset.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] Offset The offset to node.
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@param[in] Length Maximum length of node.
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@return pointer to node.
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**/
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CONST VOID *
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EFIAPI
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FdtOffsetPointer (
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IN CONST VOID *Fdt,
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IN INT32 Offset,
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IN UINT32 Length
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)
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{
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return fdt_offset_ptr (Fdt, Offset, Length);
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}
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/**
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Returns a offset of next node from the given node.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] Offset The offset to previous node.
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@param[in] Depth The depth to the level of tree hierarchy.
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@return The offset to next node offset.
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**/
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INT32
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EFIAPI
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FdtNextNode (
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IN CONST VOID *Fdt,
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IN INT32 Offset,
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IN INT32 *Depth
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)
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{
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return fdt_next_node (Fdt, Offset, Depth);
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}
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/**
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Returns a offset of first node under the given node.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] Offset The offset to previous node.
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@return The offset to next node offset.
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**/
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INT32
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EFIAPI
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FdtFirstSubnode (
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IN CONST VOID *Fdt,
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IN INT32 Offset
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)
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{
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return fdt_first_subnode (Fdt, Offset);
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}
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/**
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Returns a offset of next node from the given node.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] Offset The offset to previous node.
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@return The offset to next node offset.
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**/
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INT32
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EFIAPI
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FdtNextSubnode (
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IN CONST VOID *Fdt,
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IN INT32 Offset
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)
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{
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return fdt_next_subnode (Fdt, Offset);
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}
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/**
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Returns the number of memory reserve map entries.
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@param[in] Fdt The pointer to FDT blob.
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@return The number of entries in the reserve map.
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**/
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INTN
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EFIAPI
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FdtGetNumberOfReserveMapEntries (
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IN CONST VOID *Fdt
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)
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{
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return fdt_num_mem_rsv (Fdt);
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}
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/**
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Returns a memory reserve map entry.
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@param[in] *Fdt The pointer to FDT blob.
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@param[in] Index Index of reserve map entry.
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@param[out] Addr Pointer to 64-bit variable to hold the start address
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@param[out] *Size Pointer to 64-bit variable to hold size of reservation
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@return 0 on success, or negative error code.
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**/
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INTN
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EFIAPI
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FdtGetReserveMapEntry (
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IN CONST VOID *Fdt,
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IN INTN Index,
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OUT EFI_PHYSICAL_ADDRESS *Addr,
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OUT UINT64 *Size
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)
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{
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return fdt_get_mem_rsv (Fdt, Index, Addr, Size);
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}
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/**
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Returns a offset of first node which includes the given name.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] ParentOffset The offset to the node which start find under.
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@param[in] Name The name to search the node with the name.
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@param[in] NameLength The length of the name to check only.
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@return The offset to node offset with given node name.
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**/
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INT32
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EFIAPI
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FdtSubnodeOffsetNameLen (
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IN CONST VOID *Fdt,
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IN INT32 ParentOffset,
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IN CONST CHAR8 *Name,
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IN INT32 NameLength
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)
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{
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return fdt_subnode_offset_namelen (Fdt, ParentOffset, Name, NameLength);
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}
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/**
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Returns a offset of first node which matches the given name.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] ParentOffset The offset to the node which start find under.
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@param[in] Name The name to search the node with the name.
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@return The offset to node offset with given node name.
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**/
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INT32
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EFIAPI
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FdtSubnodeOffset (
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IN CONST VOID *Fdt,
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IN INT32 ParentOffset,
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IN CONST CHAR8 *Name
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)
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{
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return fdt_subnode_offset (Fdt, ParentOffset, Name);
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}
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/**
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Find the parent of a given node.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] NodeOffset The offset to the node to find the parent for.
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@return Structure block offset, or negative return value.
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**/
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INT32
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EFIAPI
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FdtParentOffset (
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IN CONST VOID *Fdt,
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IN INT32 NodeOffset
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)
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{
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return fdt_parent_offset (Fdt, NodeOffset);
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}
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/**
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Returns a offset of first node which includes the given property name and value.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] StartOffset The offset to the starting node to find.
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@param[in] PropertyName The property name to search the node including the named property.
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@param[in] PropertyValue The property value (big-endian) to check the same property value.
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@param[in] PropertyLength The length of the value in PropertValue.
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@return The offset to node offset with given property.
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**/
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INT32
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EFIAPI
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FdtNodeOffsetByPropertyValue (
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IN CONST VOID *Fdt,
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IN INT32 StartOffset,
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IN CONST CHAR8 *PropertyName,
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IN CONST VOID *PropertyValue,
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IN INT32 PropertyLength
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)
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{
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return fdt_node_offset_by_prop_value (Fdt, StartOffset, PropertyName, PropertyValue, PropertyLength);
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}
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/**
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Returns a offset of first node which includes the given property name and value.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] Phandle Phandle value to search for.
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@return The offset to node with matching Phandle value.
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**/
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INT32
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EFIAPI
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FdtNodeOffsetByPhandle (
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IN CONST VOID *Fdt,
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IN UINT32 Phandle
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)
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{
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return fdt_node_offset_by_phandle (Fdt, Phandle);
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}
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/**
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Look for a string in a stringlist
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@param[in] StringList Pointer to stringlist to search.
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@param[in] ListLength Length of StringList.
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@param[in] String Pointer to string to search for.
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@return 1 if found.
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**/
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INT32
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EFIAPI
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FdtStringListContains (
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IN CONST CHAR8 *StringList,
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IN INT32 ListLength,
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IN CONST CHAR8 *String
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)
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{
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return fdt_stringlist_contains (StringList, ListLength, String);
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}
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/**
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Returns a property with the given name from the given node.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] NodeOffset The offset to the given node.
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@param[in] Name The name to the property which need be searched
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@param[in] Length The length to the size of the property found.
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@return The property to the structure of the found property. Since the data
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come from FDT blob, it's encoding with big-endian.
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**/
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CONST FDT_PROPERTY *
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EFIAPI
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FdtGetProperty (
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IN CONST VOID *Fdt,
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IN INT32 NodeOffset,
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IN CONST CHAR8 *Name,
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IN INT32 *Length
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)
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{
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return (FDT_PROPERTY *)fdt_get_property (Fdt, NodeOffset, Name, Length);
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}
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/**
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Returns a pointer to a node mapped to an alias matching a substring.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] Name The alias name string.
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@param[in] Length The length to the size of the property found.
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@return A pointer to the expansion of the alias matching the substring,
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or NULL if alias not found.
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**/
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CONST CHAR8 *
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EFIAPI
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FdtGetAliasNameLen (
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IN CONST VOID *Fdt,
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IN CONST CHAR8 *Name,
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IN INT32 Length
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)
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{
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return fdt_get_alias_namelen (Fdt, Name, Length);
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}
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/**
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Returns a offset of first property in the given node.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] NodeOffset The offset to the node which need be searched.
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@return The offset to first property offset in the given node.
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**/
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INT32
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EFIAPI
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FdtFirstPropertyOffset (
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IN CONST VOID *Fdt,
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IN INT32 NodeOffset
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)
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{
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return fdt_first_property_offset (Fdt, NodeOffset);
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}
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/**
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Returns a offset of next property from the given property.
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@param[in] Fdt The pointer to FDT blob.
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@param[in] Offset The offset to previous property.
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@return The offset to next property offset.
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**/
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INT32
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EFIAPI
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FdtNextPropertyOffset (
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IN CONST VOID *Fdt,
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IN INT32 Offset
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)
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{
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return fdt_next_property_offset (Fdt, Offset);
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}
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/**
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Returns a property from the given offset of the property.
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|
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@param[in] Fdt The pointer to FDT blob.
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@param[in] Offset The offset to the given offset of the property.
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@param[in] Length The length to the size of the property found.
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@return The property to the structure of the given property offset.
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**/
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CONST FDT_PROPERTY *
|
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EFIAPI
|
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FdtGetPropertyByOffset (
|
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IN CONST VOID *Fdt,
|
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IN INT32 Offset,
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IN INT32 *Length
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)
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{
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return (FDT_PROPERTY *)fdt_get_property_by_offset (Fdt, Offset, Length);
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}
|
|
|
|
/**
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Returns a string by the given string offset.
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|
|
|
@param[in] Fdt The pointer to FDT blob.
|
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@param[in] StrOffset The offset to the location in the strings block of FDT.
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@param[in] Length The length to the size of string which need be retrieved.
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@return The string to the given string offset.
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|
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**/
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CONST CHAR8 *
|
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EFIAPI
|
|
FdtGetString (
|
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IN CONST VOID *Fdt,
|
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IN INT32 StrOffset,
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IN INT32 *Length OPTIONAL
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)
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{
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return fdt_get_string (Fdt, StrOffset, Length);
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}
|
|
|
|
/**
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|
Add a new node to the FDT.
|
|
|
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@param[in] Fdt The pointer to FDT blob.
|
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@param[in] ParentOffset The offset to the node offset which want to add in.
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@param[in] Name The name to name the node.
|
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@return The offset to the new node.
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|
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**/
|
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INT32
|
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EFIAPI
|
|
FdtAddSubnode (
|
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IN VOID *Fdt,
|
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IN INT32 ParentOffset,
|
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IN CONST CHAR8 *Name
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)
|
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{
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return fdt_add_subnode (Fdt, ParentOffset, Name);
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}
|
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|
|
/**
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|
Add or modify a property in the given node.
|
|
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|
@param[in] Fdt The pointer to FDT blob.
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@param[in] NodeOffset The offset to the node offset which want to add in.
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@param[in] Name The name to name the property.
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@param[in] Value The value (big-endian) to the property value.
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@param[in] Length The length to the size of the property.
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@return Zero for successfully, otherwise failed.
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|
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**/
|
|
INT32
|
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EFIAPI
|
|
FdtSetProperty (
|
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IN VOID *Fdt,
|
|
IN INT32 NodeOffset,
|
|
IN CONST CHAR8 *Name,
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IN CONST VOID *Value,
|
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IN UINT32 Length
|
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)
|
|
{
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return fdt_setprop (Fdt, NodeOffset, Name, Value, (int)Length);
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}
|
|
|
|
/**
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|
Set a property to a 64-bit integer.
|
|
|
|
@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.
|
|
|
|
@return Zero for successfully, otherwise failed.
|
|
|
|
**/
|
|
INT32
|
|
EFIAPI
|
|
FdtSetPropU64 (
|
|
IN VOID *Fdt,
|
|
IN INT32 NodeOffset,
|
|
IN CONST CHAR8 *Name,
|
|
IN UINT64 Value
|
|
)
|
|
{
|
|
UINT64 Tmp;
|
|
|
|
Tmp = cpu_to_fdt64 (Value);
|
|
|
|
return fdt_setprop (Fdt, NodeOffset, Name, &Tmp, sizeof (Tmp));
|
|
}
|
|
|
|
/**
|
|
Append or create 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
|
|
FdtAppendProp (
|
|
IN VOID *Fdt,
|
|
IN INT32 NodeOffset,
|
|
IN CONST CHAR8 *Name,
|
|
IN CONST VOID *Value,
|
|
IN UINT32 Length
|
|
)
|
|
{
|
|
return fdt_appendprop (Fdt, NodeOffset, Name, Value, (int)Length);
|
|
}
|
|
|
|
/**
|
|
Delete a property.
|
|
|
|
This function will delete data from the blob, and will therefore
|
|
change the offsets of some existing nodes.
|
|
|
|
@param[in][out] Fdt Pointer to the device tree blob.
|
|
@param[in] NodeOffset Offset of the node whose property to nop.
|
|
@param[in] Name Name of the property to nop.
|
|
|
|
@return Zero for successfully, otherwise failed.
|
|
|
|
**/
|
|
INT32
|
|
FdtDelProp (
|
|
IN OUT VOID *Fdt,
|
|
IN INT32 NodeOffset,
|
|
IN CONST CHAR8 *Name
|
|
)
|
|
{
|
|
return fdt_delprop (Fdt, NodeOffset, Name);
|
|
}
|
|
|
|
/**
|
|
Finds a tree node by substring
|
|
|
|
@param[in] Fdt The pointer to FDT blob.
|
|
@param[in] Path Full path of the node to locate.
|
|
@param[in] NameLength The length of the name to check only.
|
|
|
|
@return structure block offset of the node with the requested path (>=0), on success
|
|
**/
|
|
INT32
|
|
EFIAPI
|
|
FdtPathOffsetNameLen (
|
|
IN CONST VOID *Fdt,
|
|
IN CONST CHAR8 *Path,
|
|
IN INT32 NameLength
|
|
)
|
|
{
|
|
return fdt_path_offset_namelen (Fdt, Path, NameLength);
|
|
}
|
|
|
|
/**
|
|
Finds a tree node by its full path.
|
|
|
|
@param[in] Fdt The pointer to FDT blob.
|
|
@param[in] Path Full path of the node to locate.
|
|
|
|
@return structure block offset of the node with the requested path (>=0), on success
|
|
**/
|
|
INT32
|
|
EFIAPI
|
|
FdtPathOffset (
|
|
IN CONST VOID *Fdt,
|
|
IN CONST CHAR8 *Path
|
|
)
|
|
{
|
|
return fdt_path_offset (Fdt, Path);
|
|
}
|
|
|
|
/**
|
|
Returns the name of a given node.
|
|
|
|
@param[in] Fdt The pointer to FDT blob.
|
|
@param[in] NodeOffset Offset of node to check.
|
|
@param[in] Length The pointer to an integer variable (will be overwritten) or NULL.
|
|
|
|
@return The pointer to the node's name.
|
|
|
|
**/
|
|
CONST CHAR8 *
|
|
EFIAPI
|
|
FdtGetName (
|
|
IN VOID *Fdt,
|
|
IN INT32 NodeOffset,
|
|
IN INT32 *Length
|
|
)
|
|
{
|
|
return fdt_get_name (Fdt, NodeOffset, Length);
|
|
}
|
|
|
|
/**
|
|
FdtNodeDepth() finds the depth of a given node. The root node
|
|
has depth 0, its immediate subnodes depth 1 and so forth.
|
|
|
|
@param[in] Fdt The pointer to FDT blob.
|
|
@param[in] NodeOffset Offset of node to check.
|
|
|
|
@returns Depth of the node at NodeOffset.
|
|
**/
|
|
INT32
|
|
EFIAPI
|
|
FdtNodeDepth (
|
|
IN CONST VOID *Fdt,
|
|
IN INT32 NodeOffset
|
|
)
|
|
{
|
|
return fdt_node_depth (Fdt, NodeOffset);
|
|
}
|
|
|
|
/**
|
|
Find nodes with a given 'compatible' value.
|
|
|
|
@param[in] Fdt The pointer to FDT blob.
|
|
@param[in] StartOffset Only find nodes after this offset.
|
|
@param[in] Compatible The string to match against.
|
|
|
|
@retval The offset of the first node after StartOffset.
|
|
**/
|
|
INT32
|
|
EFIAPI
|
|
FdtNodeOffsetByCompatible (
|
|
IN CONST VOID *Fdt,
|
|
IN INT32 StartOffset,
|
|
IN CONST CHAR8 *Compatible
|
|
)
|
|
{
|
|
return fdt_node_offset_by_compatible (Fdt, StartOffset, Compatible);
|
|
}
|
|
|
|
/**
|
|
Retrieve address size for a bus represented in the tree
|
|
|
|
@param[in] Fdt The pointer to FDT blob.
|
|
@param[in] NodeOffset Offset of node to check.
|
|
|
|
@return Number of cells in the bus address, or negative error.
|
|
**/
|
|
INT32
|
|
EFIAPI
|
|
FdtAddressCells (
|
|
IN CONST VOID *Fdt,
|
|
IN INT32 NodeOffset
|
|
)
|
|
{
|
|
return fdt_address_cells (Fdt, NodeOffset);
|
|
}
|
|
|
|
/**
|
|
Retrieve address range size for a bus represented in the tree
|
|
|
|
@param[in] Fdt The pointer to FDT blob.
|
|
@param[in] NodeOffset Offset of node to check.
|
|
|
|
@return Number of cells in the bus size, or negative error.
|
|
**/
|
|
INT32
|
|
EFIAPI
|
|
FdtSizeCells (
|
|
IN CONST VOID *Fdt,
|
|
IN INT32 NodeOffset
|
|
)
|
|
{
|
|
return fdt_size_cells (Fdt, NodeOffset);
|
|
}
|
|
|
|
/* Debug functions. */
|
|
CONST
|
|
CHAR8
|
|
*
|
|
FdtStrerror (
|
|
IN INT32 ErrVal
|
|
)
|
|
{
|
|
return fdt_strerror (ErrVal);
|
|
}
|