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Add DMA Lib for generic ARM cache coherency model. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10556 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
andrewfish 2010-05-29 00:34:43 +00:00
parent 81bc205daf
commit 938f46b44f
2 changed files with 319 additions and 0 deletions
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269
ArmPkg/Library/ArmDmaLib/ArmDmaLib.c Executable file
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/** @file
Generic ARM implementation of DmaLib.h
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/DebugLib.h>
#include <Library/DmaLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UncachedMemoryAllocationLib.h>
#include <Library/IoLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/ArmLib.h>
#include <Protocol/Cpu.h>
typedef struct {
EFI_PHYSICAL_ADDRESS HostAddress;
EFI_PHYSICAL_ADDRESS DeviceAddress;
UINTN NumberOfBytes;
DMA_MAP_OPERATION Operation;
BOOLEAN DoubleBuffer;
} MAP_INFO_INSTANCE;
EFI_CPU_ARCH_PROTOCOL *gCpu;
UINTN gCacheAlignment = 0;
/**
Provides the DMA controller-specific addresses needed to access system memory.
Operation is relative to the DMA bus master.
@param Operation Indicates if the bus master is going to read or write to system memory.
@param HostAddress The system memory address to map to the DMA controller.
@param NumberOfBytes On input the number of bytes to map. On output the number of bytes
that were mapped.
@param DeviceAddress The resulting map address for the bus master controller to use to
access the hosts HostAddress.
@param Mapping A resulting value to pass to Unmap().
@retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
@retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.
@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
@retval EFI_DEVICE_ERROR The system hardware could not map the requested address.
**/
EFI_STATUS
EFIAPI
DmaMap (
IN DMA_MAP_OPERATION Operation,
IN VOID *HostAddress,
IN OUT UINTN *NumberOfBytes,
OUT PHYSICAL_ADDRESS *DeviceAddress,
OUT VOID **Mapping
)
{
EFI_STATUS Status;
MAP_INFO_INSTANCE *Map;
VOID *Buffer;
if ( HostAddress == NULL || NumberOfBytes == NULL ||
DeviceAddress == NULL || Mapping == NULL ) {
return EFI_INVALID_PARAMETER;
}
if (Operation >= MapOperationMaximum) {
return EFI_INVALID_PARAMETER;
}
*DeviceAddress = ConvertToPhysicalAddress (HostAddress);
// Remember range so we can flush on the other side
Map = AllocatePool (sizeof (MAP_INFO_INSTANCE));
if (Map == NULL) {
return EFI_OUT_OF_RESOURCES;
}
*Mapping = Map;
if (((UINTN)HostAddress & (gCacheAlignment - 1)) != 0) {
Map->DoubleBuffer = TRUE;
Status = DmaAllocateBuffer (EfiBootServicesData, EFI_SIZE_TO_PAGES (*NumberOfBytes), &Buffer);
if (EFI_ERROR (Status)) {
return Status;
}
*DeviceAddress = (PHYSICAL_ADDRESS)(UINTN)Buffer;
} else {
Map->DoubleBuffer = FALSE;
}
*NumberOfBytes &= *NumberOfBytes & ~(gCacheAlignment - 1); // Only do it on full cache lines
Map->HostAddress = (UINTN)HostAddress;
Map->DeviceAddress = *DeviceAddress;
Map->NumberOfBytes = *NumberOfBytes;
Map->Operation = Operation;
if (Map->DoubleBuffer) {
if (Map->Operation == MapOperationBusMasterWrite) {
CopyMem ((VOID *)(UINTN)Map->DeviceAddress, (VOID *)(UINTN)Map->HostAddress, Map->NumberOfBytes);
}
} else {
// EfiCpuFlushTypeWriteBack, EfiCpuFlushTypeInvalidate
if (Map->Operation == MapOperationBusMasterWrite || Map->Operation == MapOperationBusMasterRead) {
gCpu->FlushDataCache (gCpu, (EFI_PHYSICAL_ADDRESS)(UINTN)HostAddress, Map->NumberOfBytes, EfiCpuFlushTypeWriteBackInvalidate);
}
}
return EFI_SUCCESS;
}
/**
Completes the DmaMapBusMasterRead(), DmaMapBusMasterWrite(), or DmaMapBusMasterCommonBuffer()
operation and releases any corresponding resources.
@param Mapping The mapping value returned from DmaMap*().
@retval EFI_SUCCESS The range was unmapped.
@retval EFI_DEVICE_ERROR The data was not committed to the target system memory.
**/
EFI_STATUS
EFIAPI
DmaUnmap (
IN VOID *Mapping
)
{
MAP_INFO_INSTANCE *Map;
if (Mapping == NULL) {
ASSERT (FALSE);
return EFI_INVALID_PARAMETER;
}
Map = (MAP_INFO_INSTANCE *)Mapping;
if (Map->DoubleBuffer) {
if (Map->Operation == MapOperationBusMasterRead) {
CopyMem ((VOID *)(UINTN)Map->HostAddress, (VOID *)(UINTN)Map->DeviceAddress, Map->NumberOfBytes);
}
DmaFreeBuffer (EFI_SIZE_TO_PAGES (Map->NumberOfBytes), (VOID *)(UINTN)Map->DeviceAddress);
} else {
if (Map->Operation == MapOperationBusMasterWrite) {
//
// Make sure we read buffer from uncached memory and not the cache
//
gCpu->FlushDataCache (gCpu, Map->HostAddress, Map->NumberOfBytes, EfiCpuFlushTypeInvalidate);
}
}
FreePool (Map);
return EFI_SUCCESS;
}
/**
Allocates pages that are suitable for an DmaMap() of type MapOperationBusMasterCommonBuffer.
mapping.
@param MemoryType The type of memory to allocate, EfiBootServicesData or
EfiRuntimeServicesData.
@param Pages The number of pages to allocate.
@param HostAddress A pointer to store the base system memory address of the
allocated range.
@retval EFI_SUCCESS The requested memory pages were allocated.
@retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are
MEMORY_WRITE_COMBINE and MEMORY_CACHED.
@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
**/
EFI_STATUS
EFIAPI
DmaAllocateBuffer (
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages,
OUT VOID **HostAddress
)
{
if (HostAddress == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData
//
// We used uncached memory to keep coherency
//
if (MemoryType == EfiBootServicesData) {
*HostAddress = UncachedAllocatePages (Pages);
} else if (MemoryType != EfiRuntimeServicesData) {
*HostAddress = UncachedAllocateRuntimePages (Pages);
} else {
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}
/**
Frees memory that was allocated with DmaAllocateBuffer().
@param Pages The number of pages to free.
@param HostAddress The base system memory address of the allocated range.
@retval EFI_SUCCESS The requested memory pages were freed.
@retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages
was not allocated with DmaAllocateBuffer().
**/
EFI_STATUS
EFIAPI
DmaFreeBuffer (
IN UINTN Pages,
IN VOID *HostAddress
)
{
if (HostAddress == NULL) {
return EFI_INVALID_PARAMETER;
}
UncachedFreePages (HostAddress, Pages);
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
ArmDmaLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
// Get the Cpu protocol for later use
Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **)&gCpu);
ASSERT_EFI_ERROR(Status);
gCacheAlignment = ArmDataCacheLineLength ();
return Status;
}

50
ArmPkg/Library/ArmDmaLib/ArmDmaLib.inf Executable file
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#/** @file
#
# 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.
#
#**/
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = ArmDmaLib
FILE_GUID = F1BD6B36-B705-43aa-8A28-33F58ED85EFB
MODULE_TYPE = UEFI_DRIVER
VERSION_STRING = 1.0
LIBRARY_CLASS = DmaLib
CONSTRUCTOR = ArmDmaLibConstructor
[Sources.common]
ArmDmaLib.c
[Packages]
MdePkg/MdePkg.dec
EmbeddedPkg/EmbeddedPkg.dec
ArmPkg/ArmPkg.dec
[LibraryClasses]
DebugLib
UefiBootServicesTableLib
MemoryAllocationLib
UncachedMemoryAllocationLib
IoLib
BaseMemoryLib
ArmLib
[Protocols]
gEfiCpuArchProtocolGuid
[Guids]
[Pcd]
[Depex]
gEfiCpuArchProtocolGuid