REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3629
MM Communication PPI was defined in PI Specification since v1.5. This
change added definition of such PPI and related GUIDs into MdePkg.
Cc: Michael D Kinney <michael.d.kin...@intel.com>
Cc: Liming Gao <gaolim...@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang....@intel.com>
Cc: Sean Brogan <sean.bro...@microsoft.com>
Signed-off-by: Kun Qin <kuqi...@gmail.com>
---
MdePkg/Include/Ppi/MmCommunication.h | 72 ++++++++++++++++++++
MdePkg/MdePkg.dec | 3 +
2 files changed, 75 insertions(+)
diff --git a/MdePkg/Include/Ppi/MmCommunication.h
b/MdePkg/Include/Ppi/MmCommunication.h
new file mode 100644
index 000000000000..7e06da2ec088
--- /dev/null
+++ b/MdePkg/Include/Ppi/MmCommunication.h
@@ -0,0 +1,72 @@
+/** @file
+ EFI MM Communication PPI definition.
+
+ This PPI provides a means of communicating between drivers outside
+ of MM and MMI handlers inside of MM in PEI phase.
+
+ Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) Microsoft Corporation.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+
+#ifndef MM_COMMUNICATION_PPI_H_
+#define MM_COMMUNICATION_PPI_H_
+
+#define EFI_PEI_MM_COMMUNICATION_PPI_GUID \
+ { \
+ 0xae933e1c, 0xcc47, 0x4e38, { 0x8f, 0xe, 0xe2, 0xf6, 0x1d, 0x26, 0x5, 0xdf
} \
+ }
+
+typedef struct _EFI_PEI_MM_COMMUNICATION_PPI EFI_PEI_MM_COMMUNICATION_PPI;
+
+/**
+ Communicates with a registered handler.
+
+ This function provides a service to send and receive messages from a
registered PEI service.
+ The EFI_PEI_MM_COMMUNICATION_PPI driver is responsible for doing any of the
copies such that
+ the data lives in PEI-service-accessible RAM.
+
+ A given implementation of the EFI_PEI_MM_COMMUNICATION_PPI may choose to use
the
+ EFI_MM_CONTROL_PPI for effecting the mode transition, or it may use some
other method.
+
+ The agent invoking the communication interface must be physical/virtually
1:1 mapped.
+
+ To avoid confusion in interpreting frames, the CommBuffer parameter should
always begin with
+ EFI_MM_COMMUNICATE_HEADER. The header data is mandatory for messages sent
into the MM agent.
+
+ Once inside of MM, the MM infrastructure will call all registered handlers
with the same
+ HandlerType as the GUID specified by HeaderGuid and the CommBuffer pointing
to Data.
+
+ This function is not reentrant.
+
+ @param[in] This The EFI_PEI_MM_COMMUNICATION_PPI instance.
+ @param[in] CommBuffer Pointer to the buffer to convey into MMRAM.
+ @param[in] CommSize The size of the data buffer being passed in.
On exit, the
+ size of data being returned. Zero if the
handler does not
+ wish to reply with any data.
+
+ @retval EFI_SUCCESS The message was successfully posted.
+ @retval EFI_INVALID_PARAMETER The buffer was NULL.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PEI_MM_COMMUNICATE)(
+ IN CONST EFI_PEI_MM_COMMUNICATION_PPI *This,
+ IN OUT VOID *CommBuffer,
+ IN OUT UINTN *CommSize
+ );
+
+///
+/// EFI MM Communication PPI provides services for communicating between PEIM
and a registered
+/// MMI handler.
+///
+struct _EFI_PEI_MM_COMMUNICATION_PPI {
+ EFI_PEI_MM_COMMUNICATE Communicate;
+};
+
+extern EFI_GUID gEfiPeiMmCommunicationPpiGuid;
+
+#endif
diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
index a28a2daaffa8..9cdc915ebae9 100644
--- a/MdePkg/MdePkg.dec
+++ b/MdePkg/MdePkg.dec
@@ -991,6 +991,9 @@ [Ppis]
## Include/Ppi/MmConfiguration.h
gEfiPeiMmConfigurationPpi = { 0xc109319, 0xc149, 0x450e, { 0xa3,
0xe3, 0xb9, 0xba, 0xdd, 0x9d, 0xc3, 0xa4 } }
+ ## Include/Ppi/MmCommunication.h
+ gEfiPeiMmCommunicationPpiGuid = { 0xae933e1c, 0xcc47, 0x4e38, { 0x8f,
0xe, 0xe2, 0xf6, 0x1d, 0x26, 0x5, 0xdf } }
+
#
# PPIs defined in PI 1.7.
#
--
2.32.0.windows.1
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