[PATCH v5 1/2] Platform/SbsaQemu: read platform version

["Marcin Juszkiewicz" <marcin.juszkiewicz@linaro.org>]

Qemu has versioning for sbsa-ref platform. TF-A reads it from provided
DeviceTree and provides as SMC.

This change adds reading platform version into EDK2.

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
---
 Platform/Qemu/SbsaQemu/SbsaQemu.dsc           |  3 +++
 .../SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c | 27 +++++++++++++++++++
 .../SbsaQemuPlatformDxe.inf                   |  5 ++++
 Silicon/Qemu/SbsaQemu/SbsaQemu.dec            |  3 +++
 4 files changed, 38 insertions(+)

diff --git a/Platform/Qemu/SbsaQemu/SbsaQemu.dsc b/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
index 9ca030cfe9a7..43798e03d33c 100644
--- a/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
+++ b/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
@@ -558,6 +558,9 @@ DEFINE NETWORK_HTTP_BOOT_ENABLE       = FALSE
   gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdChassisAssetTag|L"AT0000"
   gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdChassisSKU|L"SK0000"
 
+  gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformVersionMajor|0x0
+  gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformVersionMinor|0x0
+
 ################################################################################
 #
 # Components Section - list of all EDK II Modules needed by this Platform
diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
index b7270a07abbd..199766c7014a 100644
--- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
+++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
@@ -7,15 +7,25 @@
 *
 **/
 
+#include <Library/ArmSmcLib.h>
 #include <Library/BaseLib.h>
 #include <Library/DebugLib.h>
 #include <Library/NonDiscoverableDeviceRegistrationLib.h>
 #include <Library/PcdLib.h>
 #include <Library/UefiBootServicesTableLib.h>
 #include <Library/UefiDriverEntryPoint.h>
+#include <IndustryStandard/ArmStdSmc.h>
 
 #include <Protocol/FdtClient.h>
 
+/* those probably should go into IndustryStandard/ArmStdSmc.h */
+#define SMC_FASTCALL       0x80000000
+#define SMC64_FUNCTION     (SMC_FASTCALL   | 0x40000000)
+#define SIP_FUNCTION       (SMC64_FUNCTION | 0x02000000)
+#define SIP_FUNCTION_ID(n) (SIP_FUNCTION   | (n))
+
+#define SIP_SVC_VERSION  SIP_FUNCTION_ID(1)
+
 EFI_STATUS
 EFIAPI
 InitializeSbsaQemuPlatformDxe (
@@ -26,6 +36,9 @@ InitializeSbsaQemuPlatformDxe (
   EFI_STATUS                     Status;
   UINTN                          Size;
   VOID*                          Base;
+  UINTN                          Arg0;
+  UINTN                          Arg1;
+  UINTN                          Result;
 
   DEBUG ((DEBUG_INFO, "%a: InitializeSbsaQemuPlatformDxe called\n", __FUNCTION__));
 
@@ -51,5 +64,19 @@ InitializeSbsaQemuPlatformDxe (
     return Status;
   }
 
+  Result = ArmCallSmc0 (SIP_SVC_VERSION, &Arg0, &Arg1, NULL);
+  if (Result == SMC_ARCH_CALL_SUCCESS)
+  {
+        Result = PcdSet32S (PcdPlatformVersionMajor, Arg0);
+        ASSERT_EFI_ERROR (Result);
+        Result = PcdSet32S (PcdPlatformVersionMinor, Arg1);
+        ASSERT_EFI_ERROR (Result);
+  }
+
+  Arg0 = PcdGet32 (PcdPlatformVersionMajor);
+  Arg1 = PcdGet32 (PcdPlatformVersionMinor);
+
+  DEBUG ((DEBUG_INFO, "Platform version: %d.%d\n", Arg0, Arg1));
+
   return EFI_SUCCESS;
 }
diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf
index 21d2135f6d17..1f2c8a9dd6af 100644
--- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf
+++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf
@@ -20,6 +20,7 @@
   SbsaQemuPlatformDxe.c
 
 [Packages]
+  ArmPkg/ArmPkg.dec
   ArmVirtPkg/ArmVirtPkg.dec
   EmbeddedPkg/EmbeddedPkg.dec
   MdeModulePkg/MdeModulePkg.dec
@@ -27,6 +28,7 @@
   Silicon/Qemu/SbsaQemu/SbsaQemu.dec
 
 [LibraryClasses]
+  ArmSmcLib
   PcdLib
   DebugLib
   NonDiscoverableDeviceRegistrationLib
@@ -36,6 +38,9 @@
   gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformAhciBase
   gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformAhciSize
 
+  gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformVersionMajor
+  gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformVersionMinor
+
 [Depex]
   TRUE
 
diff --git a/Silicon/Qemu/SbsaQemu/SbsaQemu.dec b/Silicon/Qemu/SbsaQemu/SbsaQemu.dec
index 9448852967b6..5182978cf56d 100644
--- a/Silicon/Qemu/SbsaQemu/SbsaQemu.dec
+++ b/Silicon/Qemu/SbsaQemu/SbsaQemu.dec
@@ -67,3 +67,6 @@
   gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdChassisManufacturer|L""|VOID*|0x0000011B
   gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdChassisAssetTag|L""|VOID*|0x0000011C
   gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdChassisSKU|L""|VOID*|0x0000011D
+
+  gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformVersionMajor|0x0|UINT32|0x0000011E
+  gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdPlatformVersionMinor|0x0|UINT32|0x0000011F
-- 
2.40.1