From e3840072cd932fc1c9fc48510866534297a58dd2 Mon Sep 17 00:00:00 2001 From: "Yao, Jiewen" Date: Fri, 27 Nov 2015 13:48:03 +0000 Subject: [PATCH] UefiCpuPkg/PiSmmCpu: Add 2 APIs in SmmCpuFeaturesLib. SmmCpuFeaturesCompleteSmmReadyToLock() is a hook point to allow CPU specific code to do more registers setting after the gEfiSmmReadyToLockProtocolGuid notification is completely processed. SmmCpuFeaturesAllocatePageTableMemory() is an API to allow CPU to allocate a specific region for storing page tables. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: "Yao, Jiewen" Reviewed-by: "Kinney, Michael D" Cc: "Fan, Jeff" Cc: "Kinney, Michael D" Cc: "Laszlo Ersek" git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18979 6f19259b-4bc3-4df7-8a09-765794883524 --- .../Include/Library/SmmCpuFeaturesLib.h | 35 +++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/UefiCpuPkg/Include/Library/SmmCpuFeaturesLib.h b/UefiCpuPkg/Include/Library/SmmCpuFeaturesLib.h index d1c7a8ac96..4478003467 100644 --- a/UefiCpuPkg/Include/Library/SmmCpuFeaturesLib.h +++ b/UefiCpuPkg/Include/Library/SmmCpuFeaturesLib.h @@ -363,4 +363,39 @@ SmmCpuFeaturesWriteSaveStateRegister ( IN CONST VOID *Buffer ); +/** + This function is hook point called after the gEfiSmmReadyToLockProtocolGuid + notification is completely processed. +**/ +VOID +EFIAPI +SmmCpuFeaturesCompleteSmmReadyToLock ( + VOID + ); + +/** + This API provides a method for a CPU to allocate a specific region for storing page tables. + + This API can be called more once to allocate memory for page tables. + + Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer to the + allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL + is returned. If there is not enough memory remaining to satisfy the request, then NULL is + returned. + + This function can also return NULL if there is no preference on where the page tables are allocated in SMRAM. + + @param Pages The number of 4 KB pages to allocate. + + @return A pointer to the allocated buffer for page tables. + @retval NULL Fail to allocate a specific region for storing page tables, + Or there is no preference on where the page tables are allocated in SMRAM. + +**/ +VOID * +EFIAPI +SmmCpuFeaturesAllocatePageTableMemory ( + IN UINTN Pages + ); + #endif -- 2.39.2