From 5bad56093534d943e4fa6e00a068dbe20c39ef81 Mon Sep 17 00:00:00 2001
From: Leif Lindholm <quic_llindhol@quicinc.com>
Date: Tue, 1 Oct 2024 15:51:26 +0100
Subject: MdePkg: export FdtAddressCells/FdtSizeCells from BaseFdtLib

Signed-off-by: Leif Lindholm <quic_llindhol@quicinc.com>
---
 MdePkg/Include/Library/FdtLib.h    | 30 ++++++++++++++++++++++++++++++
 MdePkg/Library/BaseFdtLib/FdtLib.c | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+)

(limited to 'MdePkg')

diff --git a/MdePkg/Include/Library/FdtLib.h b/MdePkg/Include/Library/FdtLib.h
index 9e085b0b60..e4471fc2ab 100644
--- a/MdePkg/Include/Library/FdtLib.h
+++ b/MdePkg/Include/Library/FdtLib.h
@@ -639,6 +639,36 @@ FdtNodeOffsetByCompatible (
   IN CONST CHAR8  *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
+  );
+
+/**
+   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
+  );
+
 /* Debug functions. */
 CONST
 CHAR8
diff --git a/MdePkg/Library/BaseFdtLib/FdtLib.c b/MdePkg/Library/BaseFdtLib/FdtLib.c
index ca25a292cd..530549ba75 100644
--- a/MdePkg/Library/BaseFdtLib/FdtLib.c
+++ b/MdePkg/Library/BaseFdtLib/FdtLib.c
@@ -542,6 +542,42 @@ FdtNodeOffsetByCompatible (
   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
-- 
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