[edk2-devel] [edk2-platforms][PATCH 4/5] JadePkg: Add PlatformBmcReadyLib to support BMC ready check

["Nhi Pham via groups.io" <nhi=os.amperecomputing.com@groups.io>]

This adds the PlatformBmcReadyLib library instance, which provides a
function to check whether the BMC is ready for transaction or not. The
function checks the GPIO pin specified by the PcdBmcReadyGpio PCD and
returns TRUE if the pin is set to a logic high level, indicating that
the BMC is ready.

Signed-off-by: Nhi Pham <nhi@os.amperecomputing.com>
---
 Platform/Ampere/JadePkg/Library/PlatformBmcReadyLib/PlatformBmcReadyLib.inf | 29 +++++++++++++++++++
 Platform/Ampere/JadePkg/Library/PlatformBmcReadyLib/PlatformBmcReadyLib.c   | 30 ++++++++++++++++++++
 2 files changed, 59 insertions(+)

diff --git a/Platform/Ampere/JadePkg/Library/PlatformBmcReadyLib/PlatformBmcReadyLib.inf b/Platform/Ampere/JadePkg/Library/PlatformBmcReadyLib/PlatformBmcReadyLib.inf
new file mode 100755
index 000000000000..493178c3fc5e
--- /dev/null
+++ b/Platform/Ampere/JadePkg/Library/PlatformBmcReadyLib/PlatformBmcReadyLib.inf
@@ -0,0 +1,29 @@
+## @file
+#
+# Copyright (c) 2024, Ampere Computing LLC. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x0001001B
+  BASE_NAME                      = PlatformBmcReadyLib
+  FILE_GUID                      = D7D58480-96D5-4820-AC2D-472F4E0B9903
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = PlatformBmcReadyLib
+
+[Sources]
+  PlatformBmcReadyLib.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  Silicon/Ampere/AmpereSiliconPkg/AmpereSiliconPkg.dec
+  Silicon/Ampere/AmpereAltraPkg/AmpereAltraPkg.dec
+
+[LibraryClasses]
+  GpioLib
+
+[Pcd]
+  gAmpereTokenSpaceGuid.PcdBmcReadyGpio
diff --git a/Platform/Ampere/JadePkg/Library/PlatformBmcReadyLib/PlatformBmcReadyLib.c b/Platform/Ampere/JadePkg/Library/PlatformBmcReadyLib/PlatformBmcReadyLib.c
new file mode 100644
index 000000000000..b1712ff393c8
--- /dev/null
+++ b/Platform/Ampere/JadePkg/Library/PlatformBmcReadyLib/PlatformBmcReadyLib.c
@@ -0,0 +1,30 @@
+/** @file
+
+  Copyright (c) 2024, Ampere Computing LLC. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Uefi.h>
+#include <Library/GpioLib.h>
+#include <Library/PcdLib.h>
+
+/**
+  This function checks whether BMC is ready for transaction or not.
+
+  @retval TRUE   The BMC is ready.
+  @retval FALSE  The BMC is not ready.
+
+**/
+BOOLEAN
+EFIAPI
+PlatformBmcReady (
+  VOID
+  )
+{
+  //
+  // The BMC is considered ready if its GPIO pin is set to a logic high level.
+  //
+  return GpioReadBit (FixedPcdGet8 (PcdBmcReadyGpio)) == 0x1;
+}
-- 
2.25.1



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