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EmbeddedPkg: Add AllocateRuntimePages in PrePiMemoryAllocationLib 

AllocateRuntimePages is used to allocate one or more 4KB pages of
type EfiRuntimeServicesData.

Cc: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Abner Chang <abner.chang@hpe.com>
Cc: Daniel Schaefer <daniel.schaefer@hpe.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Ard Biesheuvel <ardb+tianocore@kernel.org>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
This commit is contained in:
Min M Xu 2022-06-22 09:00:23 +08:00 committed by mergify[bot]
parent 7cc7c52670
commit fb008dbe01
2 changed files with 68 additions and 16 deletions
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19
EmbeddedPkg/Include/Library/PrePiLib.h
View File

@ -665,6 +665,25 @@ AllocatePages (
IN UINTN Pages
);
/**
Allocates one or more 4KB pages of type EfiRuntimeServicesData.
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.
@param Pages The number of 4 KB pages to allocate.
@return A pointer to the allocated buffer or NULL if allocation fails.
**/
VOID *
EFIAPI
AllocateRuntimePages (
IN UINTN Pages
);
/**
Allocates a buffer of type EfiBootServicesData.

65
EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c
View File

@ -14,23 +14,12 @@
#include <Library/PrePiLib.h>
#include <Library/DebugLib.h>
/**
Allocates one or more 4KB pages of type EfiBootServicesData.
Allocates the number of 4KB pages of MemoryType 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.
@param Pages The number of 4 KB pages to allocate.
@return A pointer to the allocated buffer or NULL if allocation fails.
**/
STATIC
VOID *
EFIAPI
AllocatePages (
IN UINTN Pages
InternalAllocatePages (
IN UINTN Pages,
IN EFI_MEMORY_TYPE MemoryType
)
{
EFI_PEI_HOB_POINTERS Hob;
@ -65,12 +54,56 @@ AllocatePages (
BuildMemoryAllocationHob (
Hob.HandoffInformationTable->EfiFreeMemoryTop,
Pages * EFI_PAGE_SIZE,
EfiBootServicesData
MemoryType
);
return (VOID *)(UINTN)Hob.HandoffInformationTable->EfiFreeMemoryTop;
}
}
/**
Allocates one or more 4KB pages of type EfiBootServicesData.
Allocates the number of 4KB pages of MemoryType 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.
@param Pages The number of 4 KB pages to allocate.
@return A pointer to the allocated buffer or NULL if allocation fails.
**/
VOID *
EFIAPI
AllocatePages (
IN UINTN Pages
)
{
return InternalAllocatePages (Pages, EfiBootServicesData);
}
/**
Allocates one or more 4KB pages of type EfiRuntimeServicesData.
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.
@param Pages The number of 4 KB pages to allocate.
@return A pointer to the allocated buffer or NULL if allocation fails.
**/
VOID *
EFIAPI
AllocateRuntimePages (
IN UINTN Pages
)
{
return InternalAllocatePages (Pages, EfiRuntimeServicesData);
}
/**
Allocates one or more 4KB pages of type EfiBootServicesData at a specified alignment.