ArmPkg/Library/UncachedMemoryAllocationLib/UncachedMemoryAllocationLib.c
/** @file
UncachedMemoryAllocation lib that uses DXE Service to change cachability for
a buffer.
Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Base.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UncachedMemoryAllocationLib.h>
#include <Library/PcdLib.h>
#include <Library/ArmLib.h>
#include <Library/DxeServicesTableLib.h>
VOID *
UncachedInternalAllocatePages (
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages
);
VOID *
UncachedInternalAllocateAlignedPages (
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages,
IN UINTN Alignment
);
//
// Assume all of memory has the same cache attributes, unless we do our magic
//
UINT64 gAttributes;
typedef struct {
VOID *Allocation;
UINTN Pages;
LIST_ENTRY Link;
} FREE_PAGE_NODE;
LIST_ENTRY mPageList = INITIALIZE_LIST_HEAD_VARIABLE (mPageList);
VOID
AddPagesToList (
IN VOID *Allocation,
UINTN Pages
)
{
FREE_PAGE_NODE *NewNode;
NewNode = AllocatePool (sizeof (LIST_ENTRY));
if (NewNode == NULL) {
ASSERT (FALSE);
return;
}
NewNode->Allocation = Allocation;
NewNode->Pages = Pages;
InsertTailList (&mPageList, &NewNode->Link);
}
VOID
RemovePagesFromList (
OUT VOID *Allocation,
OUT UINTN *Pages
)
{
LIST_ENTRY *Link;
FREE_PAGE_NODE *OldNode;
*Pages = 0;
for (Link = mPageList.ForwardLink; Link != &mPageList; Link = Link->ForwardLink) {
OldNode = BASE_CR (Link, FREE_PAGE_NODE, Link);
if (OldNode->Allocation == Allocation) {
*Pages = OldNode->Pages;
RemoveEntryList (&OldNode->Link);
FreePool (OldNode);
return;
}
}
return;
}
/**
Converts a cached or uncached address to a physical address suitable for use in SoC registers.
@param VirtualAddress The pointer to convert.
@return The physical address of the supplied virtual pointer.
**/
EFI_PHYSICAL_ADDRESS
ConvertToPhysicalAddress (
IN VOID *VirtualAddress
)
{
return (EFI_PHYSICAL_ADDRESS)(UINTN)VirtualAddress;
}
VOID *
UncachedInternalAllocatePages (
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages
)
{
return UncachedInternalAllocateAlignedPages (MemoryType, Pages, EFI_PAGE_SIZE);
}
VOID *
EFIAPI
UncachedAllocatePages (
IN UINTN Pages
)
{
return UncachedInternalAllocatePages (EfiBootServicesData, Pages);
}
VOID *
EFIAPI
UncachedAllocateRuntimePages (
IN UINTN Pages
)
{
return UncachedInternalAllocatePages (EfiRuntimeServicesData, Pages);
}
VOID *
EFIAPI
UncachedAllocateReservedPages (
IN UINTN Pages
)
{
return UncachedInternalAllocatePages (EfiReservedMemoryType, Pages);
}
VOID
EFIAPI
UncachedFreePages (
IN VOID *Buffer,
IN UINTN Pages
)
{
UncachedFreeAlignedPages (Buffer, Pages);
return;
}
VOID *
UncachedInternalAllocateAlignedPages (
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages,
IN UINTN Alignment
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS Memory;
EFI_PHYSICAL_ADDRESS AlignedMemory;
UINTN AlignmentMask;
UINTN UnalignedPages;
UINTN RealPages;
EFI_GCD_MEMORY_SPACE_DESCRIPTOR Descriptor;
//
// Alignment must be a power of two or zero.
//
ASSERT ((Alignment & (Alignment - 1)) == 0);
if (Pages == 0) {
return NULL;
}
if (Alignment > EFI_PAGE_SIZE) {
//
// Caculate the total number of pages since alignment is larger than page size.
//
AlignmentMask = Alignment - 1;
RealPages = Pages + EFI_SIZE_TO_PAGES (Alignment);
//
// Make sure that Pages plus EFI_SIZE_TO_PAGES (Alignment) does not overflow.
//
ASSERT (RealPages > Pages);
Status = gBS->AllocatePages (AllocateAnyPages, MemoryType, RealPages, &Memory);
if (EFI_ERROR (Status)) {
return NULL;
}
AlignedMemory = ((UINTN) Memory + AlignmentMask) & ~AlignmentMask;
UnalignedPages = EFI_SIZE_TO_PAGES (AlignedMemory - (UINTN) Memory);
if (UnalignedPages > 0) {
//
// Free first unaligned page(s).
//
Status = gBS->FreePages (Memory, UnalignedPages);
ASSERT_EFI_ERROR (Status);
}
Memory = (EFI_PHYSICAL_ADDRESS) (AlignedMemory + EFI_PAGES_TO_SIZE (Pages));
UnalignedPages = RealPages - Pages - UnalignedPages;
if (UnalignedPages > 0) {
//
// Free last unaligned page(s).
//
Status = gBS->FreePages (Memory, UnalignedPages);
ASSERT_EFI_ERROR (Status);
}
} else {
//
// Do not over-allocate pages in this case.
//
Status = gBS->AllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);
if (EFI_ERROR (Status)) {
return NULL;
}
AlignedMemory = (UINTN) Memory;
}
Status = gDS->GetMemorySpaceDescriptor (Memory, &Descriptor);
if (!EFI_ERROR (Status)) {
// We are making an assumption that all of memory has the same default attributes
gAttributes = Descriptor.Attributes;
}
Status = gDS->SetMemorySpaceAttributes (Memory, EFI_PAGES_TO_SIZE (Pages), EFI_MEMORY_WC);
ASSERT_EFI_ERROR (Status);
return (VOID *)(UINTN)Memory;
}
VOID
EFIAPI
UncachedFreeAlignedPages (
IN VOID *Buffer,
IN UINTN Pages
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS Memory;
ASSERT (Pages != 0);
Memory = (EFI_PHYSICAL_ADDRESS) (UINTN) Buffer;
Status = gDS->SetMemorySpaceAttributes (Memory, EFI_PAGES_TO_SIZE (Pages), gAttributes);
Status = gBS->FreePages (Memory, Pages);
ASSERT_EFI_ERROR (Status);
}
VOID *
UncachedInternalAllocateAlignedPool (
IN EFI_MEMORY_TYPE PoolType,
IN UINTN AllocationSize,
IN UINTN Alignment
)
{
VOID *AlignedAddress;
//
// Alignment must be a power of two or zero.
//
ASSERT ((Alignment & (Alignment - 1)) == 0);
if (Alignment < EFI_PAGE_SIZE) {
Alignment = EFI_PAGE_SIZE;
}
AlignedAddress = UncachedInternalAllocateAlignedPages (PoolType, EFI_SIZE_TO_PAGES (AllocationSize), Alignment);
if (AlignedAddress == NULL) {
return NULL;
}
AddPagesToList ((VOID *)(UINTN)AlignedAddress, EFI_SIZE_TO_PAGES (AllocationSize));
return (VOID *) AlignedAddress;
}
VOID *
EFIAPI
UncachedAllocateAlignedPool (
IN UINTN AllocationSize,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedPool (EfiBootServicesData, AllocationSize, Alignment);
}
VOID *
EFIAPI
UncachedAllocateAlignedRuntimePool (
IN UINTN AllocationSize,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedPool (EfiRuntimeServicesData, AllocationSize, Alignment);
}
VOID *
EFIAPI
UncachedAllocateAlignedReservedPool (
IN UINTN AllocationSize,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedPool (EfiReservedMemoryType, AllocationSize, Alignment);
}
VOID *
UncachedInternalAllocateAlignedZeroPool (
IN EFI_MEMORY_TYPE PoolType,
IN UINTN AllocationSize,
IN UINTN Alignment
)
{
VOID *Memory;
Memory = UncachedInternalAllocateAlignedPool (PoolType, AllocationSize, Alignment);
if (Memory != NULL) {
Memory = ZeroMem (Memory, AllocationSize);
}
return Memory;
}
VOID *
EFIAPI
UncachedAllocateAlignedZeroPool (
IN UINTN AllocationSize,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedZeroPool (EfiBootServicesData, AllocationSize, Alignment);
}
VOID *
EFIAPI
UncachedAllocateAlignedRuntimeZeroPool (
IN UINTN AllocationSize,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedZeroPool (EfiRuntimeServicesData, AllocationSize, Alignment);
}
VOID *
EFIAPI
UncachedAllocateAlignedReservedZeroPool (
IN UINTN AllocationSize,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedZeroPool (EfiReservedMemoryType, AllocationSize, Alignment);
}
VOID *
UncachedInternalAllocateAlignedCopyPool (
IN EFI_MEMORY_TYPE PoolType,
IN UINTN AllocationSize,
IN CONST VOID *Buffer,
IN UINTN Alignment
)
{
VOID *Memory;
ASSERT (Buffer != NULL);
ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1));
Memory = UncachedInternalAllocateAlignedPool (PoolType, AllocationSize, Alignment);
if (Memory != NULL) {
Memory = CopyMem (Memory, Buffer, AllocationSize);
}
return Memory;
}
VOID *
EFIAPI
UncachedAllocateAlignedCopyPool (
IN UINTN AllocationSize,
IN CONST VOID *Buffer,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedCopyPool (EfiBootServicesData, AllocationSize, Buffer, Alignment);
}
VOID *
EFIAPI
UncachedAllocateAlignedRuntimeCopyPool (
IN UINTN AllocationSize,
IN CONST VOID *Buffer,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer, Alignment);
}
VOID *
EFIAPI
UncachedAllocateAlignedReservedCopyPool (
IN UINTN AllocationSize,
IN CONST VOID *Buffer,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedCopyPool (EfiReservedMemoryType, AllocationSize, Buffer, Alignment);
}
VOID
EFIAPI
UncachedFreeAlignedPool (
IN VOID *Allocation
)
{
UINTN Pages;
RemovePagesFromList (Allocation, &Pages);
UncachedFreePages (Allocation, Pages);
}
VOID *
UncachedInternalAllocatePool (
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN AllocationSize
)
{
UINTN CacheLineLength = ArmDataCacheLineLength ();
return UncachedInternalAllocateAlignedPool (MemoryType, AllocationSize, CacheLineLength);
}
VOID *
EFIAPI
UncachedAllocatePool (
IN UINTN AllocationSize
)
{
return UncachedInternalAllocatePool (EfiBootServicesData, AllocationSize);
}
VOID *
EFIAPI
UncachedAllocateRuntimePool (
IN UINTN AllocationSize
)
{
return UncachedInternalAllocatePool (EfiRuntimeServicesData, AllocationSize);
}
VOID *
EFIAPI
UncachedAllocateReservedPool (
IN UINTN AllocationSize
)
{
return UncachedInternalAllocatePool (EfiReservedMemoryType, AllocationSize);
}
VOID *
UncachedInternalAllocateZeroPool (
IN EFI_MEMORY_TYPE PoolType,
IN UINTN AllocationSize
)
{
VOID *Memory;
Memory = UncachedInternalAllocatePool (PoolType, AllocationSize);
if (Memory != NULL) {
Memory = ZeroMem (Memory, AllocationSize);
}
return Memory;
}
VOID *
EFIAPI
UncachedAllocateZeroPool (
IN UINTN AllocationSize
)
{
return UncachedInternalAllocateZeroPool (EfiBootServicesData, AllocationSize);
}
VOID *
EFIAPI
UncachedAllocateRuntimeZeroPool (
IN UINTN AllocationSize
)
{
return UncachedInternalAllocateZeroPool (EfiRuntimeServicesData, AllocationSize);
}
VOID *
EFIAPI
UncachedAllocateReservedZeroPool (
IN UINTN AllocationSize
)
{
return UncachedInternalAllocateZeroPool (EfiReservedMemoryType, AllocationSize);
}
VOID *
UncachedInternalAllocateCopyPool (
IN EFI_MEMORY_TYPE PoolType,
IN UINTN AllocationSize,
IN CONST VOID *Buffer
)
{
VOID *Memory;
ASSERT (Buffer != NULL);
ASSERT (AllocationSize <= (MAX_ADDRESS - (UINTN) Buffer + 1));
Memory = UncachedInternalAllocatePool (PoolType, AllocationSize);
if (Memory != NULL) {
Memory = CopyMem (Memory, Buffer, AllocationSize);
}
return Memory;
}
VOID *
EFIAPI
UncachedAllocateCopyPool (
IN UINTN AllocationSize,
IN CONST VOID *Buffer
)
{
return UncachedInternalAllocateCopyPool (EfiBootServicesData, AllocationSize, Buffer);
}
VOID *
EFIAPI
UncachedAllocateRuntimeCopyPool (
IN UINTN AllocationSize,
IN CONST VOID *Buffer
)
{
return UncachedInternalAllocateCopyPool (EfiRuntimeServicesData, AllocationSize, Buffer);
}
VOID *
EFIAPI
UncachedAllocateReservedCopyPool (
IN UINTN AllocationSize,
IN CONST VOID *Buffer
)
{
return UncachedInternalAllocateCopyPool (EfiReservedMemoryType, AllocationSize, Buffer);
}
VOID
EFIAPI
UncachedFreePool (
IN VOID *Buffer
)
{
UncachedFreeAlignedPool (Buffer);
}
VOID
EFIAPI
UncachedSafeFreePool (
IN VOID *Buffer
)
{
if (Buffer != NULL) {
UncachedFreePool (Buffer);
Buffer = NULL;
}
}