Follow PI 1.6 spec to add FreePages definition and comments for
AllocatePages that will support pre permanent memory page allocation.
Cc: Liming Gao <liming....@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.z...@intel.com>
---
MdePkg/Include/Pi/PiPeiCis.h | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/MdePkg/Include/Pi/PiPeiCis.h b/MdePkg/Include/Pi/PiPeiCis.h
index eda814a8701a..aebe3eacf442 100644
--- a/MdePkg/Include/Pi/PiPeiCis.h
+++ b/MdePkg/Include/Pi/PiPeiCis.h
@@ -452,6 +452,11 @@ EFI_STATUS
The purpose of the service is to publish an interface that allows
PEIMs to allocate memory ranges that are managed by the PEI Foundation.
+ Prior to InstallPeiMemory() being called, PEI will allocate pages from the
heap.
+ After InstallPeiMemory() is called, PEI will allocate pages within the region
+ of memory provided by InstallPeiMemory() service in a best-effort fashion.
+ Location-specific allocations are not managed by the PEI foundation code.
+
@param PeiServices An indirect pointer to the EFI_PEI_SERVICES table
published by the PEI Foundation.
@param MemoryType The type of memory to allocate.
@param Pages The number of contiguous 4 KB pages to allocate.
@@ -475,6 +480,27 @@ EFI_STATUS
);
/**
+ Frees memory pages.
+
+ @param[in] PeiServices An indirect pointer to the EFI_PEI_SERVICES
table published by the PEI Foundation.
+ @param[in] Memory The base physical address of the pages to be
freed.
+ @param[in] Pages The number of contiguous 4 KB pages to free.
+
+ @retval EFI_SUCCESS The requested pages were freed.
+ @retval EFI_INVALID_PARAMETER Memory is not a page-aligned address or Pages
is invalid.
+ @retval EFI_NOT_FOUND The requested memory pages were not allocated
with
+ AllocatePages().
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PEI_FREE_PAGES) (
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN EFI_PHYSICAL_ADDRESS Memory,
+ IN UINTN Pages
+ );
+
+/**
The purpose of this service is to publish an interface that
allows PEIMs to allocate memory ranges that are managed by the PEI
Foundation.
@@ -929,6 +955,7 @@ struct _EFI_PEI_SERVICES {
EFI_PEI_FFS_FIND_SECTION_DATA3 FindSectionData3;
EFI_PEI_FFS_GET_FILE_INFO2 FfsGetFileInfo2;
EFI_PEI_RESET2_SYSTEM ResetSystem2;
+ EFI_PEI_FREE_PAGES FreePages;
};
--
2.7.0.windows.1
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