[edk2-devel] [edk2-platforms v2 2/3] SbsaQemu: Update SbsaQemuAcpiDxe to use FdtHelperLib

[Rebecca Cran]

Use the copy of the CountCpusFromFdt function from FdtHelperLib.

Signed-off-by: Rebecca Cran <rebecca at nuviainc.com>
---
 Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c   | 50 +-------------------
 Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf |  1 +
 2 files changed, 2 insertions(+), 49 deletions(-)

diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
index fb7c1835c3d7..02ba3e452c06 100644
--- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
+++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
@@ -12,6 +12,7 @@
 #include <Library/AcpiLib.h>
 #include <Library/BaseMemoryLib.h>
 #include <Library/DebugLib.h>
+#include <Library/FdtHelperLib.h>
 #include <Library/MemoryAllocationLib.h>
 #include <Library/PcdLib.h>
 #include <Library/PrintLib.h>
@@ -25,55 +26,6 @@
 STATIC INT32 FdtFirstCpuOffset;
 STATIC INT32 FdtCpuNodeSize;
 
-/*
- * A function that walks through the Device Tree created
- * by Qemu and counts the number of CPUs present in it.
- */
-STATIC
-VOID
-CountCpusFromFdt (
-  VOID
-)
-{
-  VOID           *DeviceTreeBase;
-  INT32          Node, Prev;
-  RETURN_STATUS  PcdStatus;
-  INT32          CpuNode;
-  INT32          CpuCount;
-
-  DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
-  ASSERT (DeviceTreeBase != NULL);
-
-  // Make sure we have a valid device tree blob
-  ASSERT (fdt_check_header (DeviceTreeBase) == 0);
-
-  CpuNode = fdt_path_offset (DeviceTreeBase, "/cpus");
-  if (CpuNode <= 0) {
-    DEBUG ((DEBUG_ERROR, "Unable to locate /cpus in device tree\n"));
-    return;
-  }
-
-  CpuCount = 0;
-
-  // Walk through /cpus node and count the number of subnodes.
-  // The count of these subnodes corresponds to the number of
-  // CPUs created by Qemu.
-  Prev = fdt_first_subnode (DeviceTreeBase, CpuNode);
-  FdtFirstCpuOffset = Prev;
-  while (1) {
-    CpuCount++;
-    Node = fdt_next_subnode (DeviceTreeBase, Prev);
-    if (Node < 0) {
-      break;
-    }
-    FdtCpuNodeSize = Node - Prev;
-    Prev = Node;
-  }
-
-  PcdStatus = PcdSet32S (PcdCoreCount, CpuCount);
-  ASSERT_RETURN_ERROR (PcdStatus);
-}
-
 /*
  * Get MPIDR from device tree passed by Qemu
  */
diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf
index 127eef029f3c..a32c1d91e834 100644
--- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf
+++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf
@@ -35,6 +35,7 @@
   DebugLib
   DxeServicesLib
   FdtLib
+  FdtHelperLib
   PcdLib
   PrintLib
   UefiDriverEntryPoint
-- 
2.26.2



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