diff options
author | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-05-28 12:44:36 +0000 |
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committer | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-05-28 12:44:36 +0000 |
commit | aaeef06375a53c77edc44fa8e5f813c227d16dea (patch) | |
tree | 893200654c42e8ccf85a967067861d02814307da /EmbeddedPkg/Library/NullDmaLib | |
parent | a108933ea8573068047d34c745f5bd2f91dec4b2 (diff) | |
download | edk2-platforms-aaeef06375a53c77edc44fa8e5f813c227d16dea.tar.xz |
Add a DMA lib that works like PCI_IO protocl. Add a NULL version that would work with Intel (DMA is coherent no matter what you do).
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10551 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'EmbeddedPkg/Library/NullDmaLib')
-rwxr-xr-x | EmbeddedPkg/Library/NullDmaLib/NullDmaLib.c | 147 | ||||
-rwxr-xr-x | EmbeddedPkg/Library/NullDmaLib/NullDmaLib.inf | 41 |
2 files changed, 188 insertions, 0 deletions
diff --git a/EmbeddedPkg/Library/NullDmaLib/NullDmaLib.c b/EmbeddedPkg/Library/NullDmaLib/NullDmaLib.c new file mode 100755 index 0000000000..0ea89190c9 --- /dev/null +++ b/EmbeddedPkg/Library/NullDmaLib/NullDmaLib.c @@ -0,0 +1,147 @@ +/** @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 <Uefi.h>
+#include <Library/DebugLib.h>
+#include <Library/DmaLib.h>
+#include <Library/MemoryAllocationLib.h>
+
+
+
+/**
+ 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
+ )
+{
+ 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
+ )
+{
+ 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 = AllocatePages (Pages);
+ } else if (MemoryType != EfiRuntimeServicesData) {
+ *HostAddress = AllocateRuntimePages (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;
+ }
+
+ FreePages (HostAddress, Pages);
+ return EFI_SUCCESS;
+}
+
diff --git a/EmbeddedPkg/Library/NullDmaLib/NullDmaLib.inf b/EmbeddedPkg/Library/NullDmaLib/NullDmaLib.inf new file mode 100755 index 0000000000..4897a8a969 --- /dev/null +++ b/EmbeddedPkg/Library/NullDmaLib/NullDmaLib.inf @@ -0,0 +1,41 @@ +#/** @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 = NullDmaLib
+ FILE_GUID = 0F2A0816-D319-4ee7-A6B8-D58524E4428F
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = DmaLib
+
+[Sources.common]
+ NullDmaLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+
+[LibraryClasses]
+ DebugLib
+ MemoryAllocationLib
+
+
+[Protocols]
+
+[Guids]
+
+[Pcd]
+
+[Depex]
+ TRUE
\ No newline at end of file |