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/** @file
Copyright (c) 2008-2009, Apple Inc. All rights reserved.
All rights reserved. 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 <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UncachedMemoryAllocationLib.h>
#include <Library/PcdLib.h>
#include <Library/ArmLib.h>
#include <Protocol/Cpu.h>
EFI_PHYSICAL_ADDRESS
ConvertToPhysicalAddress (
IN VOID *VirtualAddress
)
{
UINTN UncachedMemoryMask = (UINTN)PcdGet64(PcdArmUncachedMemoryMask);
UINTN PhysicalAddress;
PhysicalAddress = (UINTN)VirtualAddress & ~UncachedMemoryMask;
return (EFI_PHYSICAL_ADDRESS)PhysicalAddress;
}
VOID *
ConvertToCachedAddress (
IN VOID *Address
)
{
return (VOID *)(UINTN)ConvertToPhysicalAddress(Address);
}
VOID *
ConvertToUncachedAddress (
IN VOID *Address
)
{
UINTN UncachedMemoryMask = (UINTN)PcdGet64(PcdArmUncachedMemoryMask);
UINTN UncachedAddress;
UncachedAddress = (UINTN)Address | UncachedMemoryMask;
return (VOID *)UncachedAddress;
}
VOID
FlushCache (
IN EFI_PHYSICAL_ADDRESS Address,
IN UINTN Size
)
{
EFI_CPU_ARCH_PROTOCOL *Cpu;
EFI_STATUS Status;
Status = gBS->LocateProtocol(&gEfiCpuArchProtocolGuid, NULL, (VOID **)&Cpu);
ASSERT_EFI_ERROR(Status);
Status = Cpu->FlushDataCache(Cpu, Address, Size, EfiCpuFlushTypeWriteBackInvalidate);
ASSERT_EFI_ERROR(Status);
}
VOID *
UncachedInternalAllocatePages (
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS Memory;
if (Pages == 0) {
return NULL;
}
Status = gBS->AllocatePages (AllocateAnyPages, MemoryType, Pages, &Memory);
if (EFI_ERROR (Status)) {
Memory = 0;
}
if (Memory != 0) {
FlushCache(Memory, EFI_PAGES_TO_SIZE(Pages));
Memory = (EFI_PHYSICAL_ADDRESS)(UINTN)ConvertToUncachedAddress((VOID *)(UINTN)Memory);
}
return (VOID *) (UINTN) Memory;
}
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
)
{
EFI_STATUS Status;
ASSERT (Pages != 0);
Buffer = ConvertToCachedAddress(Buffer);
Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
ASSERT_EFI_ERROR (Status);
}
VOID *
UncachedInternalAllocateAlignedPages (
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages,
IN UINTN Alignment
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS Memory;
UINTN AlignedMemory;
UINTN AlignmentMask;
UINTN UnalignedPages;
UINTN RealPages;
//
// 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;
}
if (AlignedMemory != 0) {
FlushCache(AlignedMemory, EFI_PAGES_TO_SIZE(Pages));
AlignedMemory = (UINTN)ConvertToUncachedAddress((VOID *)AlignedMemory);
}
return (VOID *) AlignedMemory;
}
VOID *
EFIAPI
UncachedAllocateAlignedPages (
IN UINTN Pages,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedPages (EfiBootServicesData, Pages, Alignment);
}
VOID *
EFIAPI
UncachedAllocateAlignedRuntimePages (
IN UINTN Pages,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedPages (EfiRuntimeServicesData, Pages, Alignment);
}
VOID *
EFIAPI
UncachedAllocateAlignedReservedPages (
IN UINTN Pages,
IN UINTN Alignment
)
{
return UncachedInternalAllocateAlignedPages (EfiReservedMemoryType, Pages, Alignment);
}
VOID
EFIAPI
UncachedFreeAlignedPages (
IN VOID *Buffer,
IN UINTN Pages
)
{
EFI_STATUS Status;
ASSERT (Pages != 0);
Buffer = ConvertToCachedAddress(Buffer);
Status = gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) Buffer, Pages);
ASSERT_EFI_ERROR (Status);
}
VOID *
UncachedInternalAllocateAlignedPool (
IN EFI_MEMORY_TYPE PoolType,
IN UINTN AllocationSize,
IN UINTN Alignment
)
{
VOID *RawAddress;
UINTN AlignedAddress;
UINTN AlignmentMask;
UINTN OverAllocationSize;
UINTN RealAllocationSize;
VOID **FreePointer;
UINTN DataCacheLineLength;
EFI_STATUS Status;
//
// Alignment must be a power of two or zero.
//
ASSERT ((Alignment & (Alignment - 1)) == 0);
DataCacheLineLength = ArmDataCacheLineLength();
// Alignment must be at least cache-line aligned
if (Alignment < DataCacheLineLength) {
Alignment = DataCacheLineLength;
}
if (Alignment == 0) {
AlignmentMask = Alignment;
} else {
AlignmentMask = Alignment - 1;
}
//
// Calculate the extra memory size, over-allocate memory pool and get the aligned memory address.
//
OverAllocationSize = sizeof (RawAddress) + AlignmentMask;
RealAllocationSize = AllocationSize + OverAllocationSize;
//
// Make sure that AllocationSize plus OverAllocationSize does not overflow.
//
ASSERT (RealAllocationSize > AllocationSize);
Status = gBS->AllocatePool (PoolType, RealAllocationSize, &RawAddress);
if (EFI_ERROR (Status)) {
return NULL;
}
AlignedAddress = ((UINTN) RawAddress + OverAllocationSize) & ~AlignmentMask;
//
// Save the original memory address just before the aligned address.
//
FreePointer = (VOID **)(AlignedAddress - sizeof (RawAddress));
*FreePointer = RawAddress;
if (AlignedAddress != 0) {
FlushCache(AlignedAddress, AllocationSize);
AlignedAddress = (UINTN)ConvertToUncachedAddress((VOID *)AlignedAddress);
}
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 *Buffer
)
{
VOID *RawAddress;
VOID **FreePointer;
EFI_STATUS Status;
Buffer = ConvertToCachedAddress(Buffer);
//
// Get the pre-saved original address in the over-allocate pool.
//
FreePointer = (VOID **)((UINTN) Buffer - sizeof (RawAddress));
RawAddress = *FreePointer;
Status = gBS->FreePool (RawAddress);
ASSERT_EFI_ERROR (Status);
}
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;
}
}
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