[edk2-devel] [PATCH v4 03/21] ArmPkg/ArmMonitorLib: Add ArmMonitorLib

[PierreGondois]

From: Pierre Gondois <Pierre.Gondois at arm.com>

The ArmMonitorLib provides an abstract interface to issue
an HyperVisor Call (HVC) or System Monitor Call (SMC) depending
on the default conduit.
The PcdMonitorConduitHvc PCD allows to select the default conduit.

Signed-off-by: Pierre Gondois <Pierre.Gondois at arm.com>
---
 ArmPkg/ArmPkg.dsc                             |  1 +
 ArmPkg/Library/ArmMonitorLib/ArmMonitorLib.c  | 34 +++++++++++++++++++
 .../Library/ArmMonitorLib/ArmMonitorLib.inf   | 29 ++++++++++++++++
 3 files changed, 64 insertions(+)
 create mode 100644 ArmPkg/Library/ArmMonitorLib/ArmMonitorLib.c
 create mode 100644 ArmPkg/Library/ArmMonitorLib/ArmMonitorLib.inf

diff --git a/ArmPkg/ArmPkg.dsc b/ArmPkg/ArmPkg.dsc
index 59fd8f295d4f..3afd212f472b 100644
--- a/ArmPkg/ArmPkg.dsc
+++ b/ArmPkg/ArmPkg.dsc
@@ -135,6 +135,7 @@ [Components.common]
   ArmPkg/Library/ArmSmcLibNull/ArmSmcLibNull.inf
   ArmPkg/Library/ArmHvcLib/ArmHvcLib.inf
   ArmPkg/Library/ArmSvcLib/ArmSvcLib.inf
+  ArmPkg/Library/ArmMonitorLib/ArmMonitorLib.inf
   ArmPkg/Library/OpteeLib/OpteeLib.inf
 
   ArmPkg/Filesystem/SemihostFs/SemihostFs.inf
diff --git a/ArmPkg/Library/ArmMonitorLib/ArmMonitorLib.c b/ArmPkg/Library/ArmMonitorLib/ArmMonitorLib.c
new file mode 100644
index 000000000000..5e91f2957325
--- /dev/null
+++ b/ArmPkg/Library/ArmMonitorLib/ArmMonitorLib.c
@@ -0,0 +1,34 @@
+/** @file
+  Arm Monitor Library.
+
+  Copyright (c) 2022, Arm Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/ArmHvcLib.h>
+#include <Library/ArmMonitorLib.h>
+#include <Library/ArmSmcLib.h>
+#include <Library/PcdLib.h>
+
+/** Monitor call.
+
+  An HyperVisor Call (HVC) or System Monitor Call (SMC) will be issued
+  depending on the default conduit. PcdMonitorConduitHvc determines the type
+  of the call: if true, do an HVC.
+
+  @param [in, out]  Args    Arguments for the HVC/SMC.
+**/
+VOID
+EFIAPI
+ArmMonitorCall (
+  IN OUT ARM_MONITOR_ARGS  *Args
+  )
+{
+  if (FeaturePcdGet (PcdMonitorConduitHvc)) {
+    ArmCallHvc ((ARM_HVC_ARGS *)Args);
+  } else {
+    ArmCallSmc ((ARM_SMC_ARGS *)Args);
+  }
+}
diff --git a/ArmPkg/Library/ArmMonitorLib/ArmMonitorLib.inf b/ArmPkg/Library/ArmMonitorLib/ArmMonitorLib.inf
new file mode 100644
index 000000000000..abaeb556d471
--- /dev/null
+++ b/ArmPkg/Library/ArmMonitorLib/ArmMonitorLib.inf
@@ -0,0 +1,29 @@
+## @file
+#  Arm Monitor Library
+#
+#  Copyright (c) 2022, Arm Limited. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+  INF_VERSION                    = 0x0001001B
+  BASE_NAME                      = ArmMonitorLib
+  FILE_GUID                      = F918DACB-FBB8-4CB6-A61D-08E75AF0E7CD
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = ArmMonitorLib
+
+[Sources]
+  ArmMonitorLib.c
+
+[Packages]
+  ArmPkg/ArmPkg.dec
+  MdePkg/MdePkg.dec
+
+[LibraryClasses]
+  ArmHvcLib
+  ArmSmcLib
+
+[Pcd]
+  gArmTokenSpaceGuid.PcdMonitorConduitHvc
-- 
2.25.1



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#91702): https://edk2.groups.io/g/devel/message/91702
Mute This Topic: https://groups.io/mt/92548697/1813853
Group Owner: devel+owner at edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [edk2-devel-archive at redhat.com]
-=-=-=-=-=-=-=-=-=-=-=-