diff options
| author | Yao, Jiewen <jiewen.yao@intel.com> | 2015-11-27 13:48:03 +0000 |
|---|---|---|
| committer | lersek <lersek@Edk2> | 2015-11-27 13:48:03 +0000 |
| commit | e3840072cd932fc1c9fc48510866534297a58dd2 (patch) | |
| tree | 86999d1c88e39055bd64d42b7d38cbec16b84748 /UefiCpuPkg | |
| parent | 118930fa2888a98ee966403d8ebba6085e52c58d (diff) | |
| download | edk2-platforms-e3840072cd932fc1c9fc48510866534297a58dd2.tar.xz | |
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" <jiewen.yao@intel.com>
Reviewed-by: "Kinney, Michael D" <michael.d.kinney@intel.com>
Cc: "Fan, Jeff" <jeff.fan@intel.com>
Cc: "Kinney, Michael D" <michael.d.kinney@intel.com>
Cc: "Laszlo Ersek" <lersek@redhat.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18979 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'UefiCpuPkg')
| -rw-r--r-- | UefiCpuPkg/Include/Library/SmmCpuFeaturesLib.h | 35 |
1 files changed, 35 insertions, 0 deletions
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
|