This patch adds a simple handler to handle event received from
"mmcommtest" shell application. It prints the version information from
the copy of the UEFI system table received from normal world.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Achin Gupta <achin.gupta@arm.com>
Signed-off-by: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
---
StandaloneMmPkg/Core/StandaloneMmCore.c | 39 +++++++++++++++++++++++++++++++
StandaloneMmPkg/Core/StandaloneMmCore.inf | 2 ++
StandaloneMmPkg/StandaloneMmPkg.dec | 2 ++
3 files changed, 43 insertions(+)
diff --git a/StandaloneMmPkg/Core/StandaloneMmCore.c b/StandaloneMmPkg/Core/StandaloneMmCore.c
index 0bb99b9710..4aaecdb2ea 100644
--- a/StandaloneMmPkg/Core/StandaloneMmCore.c
+++ b/StandaloneMmPkg/Core/StandaloneMmCore.c
@@ -95,6 +95,15 @@ EFI_MM_SYSTEM_TABLE gMmCoreMmst = {
//
BOOLEAN mInLegacyBoot = FALSE;
+EFI_STATUS
+EFIAPI
+MmCommTestHandler (
+ IN EFI_HANDLE DispatchHandle,
+ IN CONST VOID *Context, OPTIONAL
+ IN OUT VOID *CommBuffer, OPTIONAL
+ IN OUT UINTN *CommBufferSize OPTIONAL
+ );
+
//
// Table of MMI Handlers that are registered by the MM Core when it is initialized
//
@@ -106,6 +115,7 @@ MM_CORE_MMI_HANDLERS mMmCoreMmiHandlers[] = {
{ MmLegacyBootHandler, &gEfiEventLegacyBootGuid, NULL, FALSE },
{ MmExitBootServiceHandler,&gEfiEventExitBootServicesGuid, NULL, FALSE },
{ MmReadyToBootHandler, &gEfiEventReadyToBootGuid, NULL, FALSE },
+ { MmCommTestHandler, &gMmCommTestGuid, NULL, TRUE },
{ NULL, NULL, NULL, FALSE },
};
@@ -379,7 +389,36 @@ MmEndOfDxeHandler (
return Status;
}
+/**
+ This function is the main entry point for communicate-based callback.
+
+ @param DispatchHandle The unique handle assigned to this handler by MmiHandlerRegister().
+ @param Context Points to an optional handler context which was specified when the handler was registered.
+ @param CommBuffer A pointer to a collection of data in memory that will
+ be conveyed from a non-MM environment into an MM environment.
+ @param CommBufferSize The size of the CommBuffer.
+ @return Status Code
+**/
+EFI_STATUS
+EFIAPI
+MmCommTestHandler (
+ IN EFI_HANDLE DispatchHandle,
+ IN CONST VOID *Context, OPTIONAL
+ IN OUT VOID *CommBuffer, OPTIONAL
+ IN OUT UINTN *CommBufferSize OPTIONAL
+ )
+{
+ EFI_SYSTEM_TABLE SystemTable;
+
+ DEBUG ((DEBUG_INFO, "MmUefiInfoHandler\n"));
+
+ CopyMem (&SystemTable, CommBuffer, sizeof(EFI_SYSTEM_TABLE));
+
+ DEBUG ((DEBUG_INFO, " UEFI Firmware Version - 0x%x\n", SystemTable.FirmwareRevision));
+
+ return EFI_SUCCESS;
+}
/**
The main entry point to MM Foundation.
diff --git a/StandaloneMmPkg/Core/StandaloneMmCore.inf b/StandaloneMmPkg/Core/StandaloneMmCore.inf
index c5eaa14ba3..b35870732c 100644
--- a/StandaloneMmPkg/Core/StandaloneMmCore.inf
+++ b/StandaloneMmPkg/Core/StandaloneMmCore.inf
@@ -78,3 +78,5 @@
gEfiEventLegacyBootGuid
gEfiEventExitBootServicesGuid
gEfiEventReadyToBootGuid
+ gMmCommTestGuid
+
diff --git a/StandaloneMmPkg/StandaloneMmPkg.dec b/StandaloneMmPkg/StandaloneMmPkg.dec
index 36521bb039..d88be3ce5e 100644
--- a/StandaloneMmPkg/StandaloneMmPkg.dec
+++ b/StandaloneMmPkg/StandaloneMmPkg.dec
@@ -39,6 +39,8 @@
gEfiStandaloneMmNonSecureBufferGuid = { 0xf00497e3, 0xbfa2, 0x41a1, { 0x9d, 0x29, 0x54, 0xc2, 0xe9, 0x37, 0x21, 0xc5 }}
gEfiArmTfCpuDriverEpDescriptorGuid = { 0x6ecbd5a1, 0xc0f8, 0x4702, { 0x83, 0x01, 0x4f, 0xc2, 0xc5, 0x47, 0x0a, 0x51 }}
+ gMmCommTestGuid = { 0xa37721e4, 0x8c0b, 0x4bca, { 0xb5, 0xe8, 0xe9, 0x2, 0xa0, 0x25, 0x51, 0x4e }}
+
[PcdsFeatureFlag]
gStandaloneMmPkgTokenSpaceGuid.PcdStandaloneMmEnable|FALSE|BOOLEAN|0x00000001
--
2.16.2
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