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| author | Yao, Jiewen <jiewen.yao@intel.com> | 2015-11-26 04:12:53 +0000 |
|---|---|---|
| committer | jyao1 <jyao1@Edk2> | 2015-11-26 04:12:53 +0000 |
| commit | 9daa916dd1efe6443f9a66dfa882f3185d33ad28 (patch) | |
| tree | 15935f7bbecc29bff5d91698f7802054fa4fd34a /UefiCpuPkg/Library/SmmCpuFeaturesLib | |
| parent | ae82a30bee2c8a4630389699391ce02a63e9a464 (diff) | |
| download | edk2-9daa916dd1efe6443f9a66dfa882f3185d33ad28.tar.gz edk2-9daa916dd1efe6443f9a66dfa882f3185d33ad28.tar.bz2 edk2-9daa916dd1efe6443f9a66dfa882f3185d33ad28.zip | |
Add 2 APIs in SmmCpuFeaturesLib.
Add NULL func for 2 new 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.
Add SmmCpuFeaturesCompleteSmmReadyToLock() to PerformRemainingTasks() and PerformPreTasks().
SmmCpuFeaturesAllocatePageTableMemory() is an API to allow
CPU to allocate a specific region for storing page tables.
All page table allocation will use AllocatePageTableMemory().
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>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18958 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'UefiCpuPkg/Library/SmmCpuFeaturesLib')
| -rw-r--r-- | UefiCpuPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c b/UefiCpuPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c index b839d3192f..3e480e1761 100644 --- a/UefiCpuPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c +++ b/UefiCpuPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c @@ -615,3 +615,44 @@ SmmCpuFeaturesWriteSaveStateRegister ( {
return EFI_UNSUPPORTED;
}
+
+/**
+ 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
+ )
+{
+ return NULL;
+}
+
|