--- /dev/null
+/** @file\r
+ Generic ARM implementation of DmaLib.h\r
+\r
+ Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r
+\r
+ This program and the accompanying materials\r
+ are licensed and made available under the terms and conditions of the BSD License\r
+ which accompanies this distribution. The full text of the license may be found at\r
+ http://opensource.org/licenses/bsd-license.php\r
+\r
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#include <Uefi.h>\r
+#include <Library/DebugLib.h>\r
+#include <Library/DmaLib.h>\r
+#include <Library/MemoryAllocationLib.h>\r
+\r
+\r
+\r
+/**\r
+ Provides the DMA controller-specific addresses needed to access system memory.\r
+\r
+ Operation is relative to the DMA bus master.\r
+\r
+ @param Operation Indicates if the bus master is going to read or write to system memory.\r
+ @param HostAddress The system memory address to map to the DMA controller.\r
+ @param NumberOfBytes On input the number of bytes to map. On output the number of bytes\r
+ that were mapped.\r
+ @param DeviceAddress The resulting map address for the bus master controller to use to\r
+ access the hosts HostAddress.\r
+ @param Mapping A resulting value to pass to Unmap().\r
+\r
+ @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r
+ @retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.\r
+ @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r
+ @retval EFI_DEVICE_ERROR The system hardware could not map the requested address.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+DmaMap (\r
+ IN DMA_MAP_OPERATION Operation,\r
+ IN VOID *HostAddress,\r
+ IN OUT UINTN *NumberOfBytes,\r
+ OUT PHYSICAL_ADDRESS *DeviceAddress,\r
+ OUT VOID **Mapping\r
+ )\r
+{\r
+ *DeviceAddress = (PHYSICAL_ADDRESS)(UINTN)HostAddress;\r
+ *Mapping = NULL;\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+\r
+/**\r
+ Completes the DmaMapBusMasterRead(), DmaMapBusMasterWrite(), or DmaMapBusMasterCommonBuffer()\r
+ operation and releases any corresponding resources.\r
+\r
+ @param Mapping The mapping value returned from DmaMap*().\r
+\r
+ @retval EFI_SUCCESS The range was unmapped.\r
+ @retval EFI_DEVICE_ERROR The data was not committed to the target system memory.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+DmaUnmap (\r
+ IN VOID *Mapping\r
+ )\r
+{\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ Allocates pages that are suitable for an DmaMap() of type MapOperationBusMasterCommonBuffer.\r
+ mapping.\r
+\r
+ @param MemoryType The type of memory to allocate, EfiBootServicesData or\r
+ EfiRuntimeServicesData.\r
+ @param Pages The number of pages to allocate.\r
+ @param HostAddress A pointer to store the base system memory address of the\r
+ allocated range.\r
+\r
+ @retval EFI_SUCCESS The requested memory pages were allocated.\r
+ @retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are\r
+ MEMORY_WRITE_COMBINE and MEMORY_CACHED.\r
+ @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r
+ @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+DmaAllocateBuffer (\r
+ IN EFI_MEMORY_TYPE MemoryType,\r
+ IN UINTN Pages,\r
+ OUT VOID **HostAddress\r
+ )\r
+{\r
+ return DmaAllocateAlignedBuffer (MemoryType, Pages, 0, HostAddress);\r
+}\r
+\r
+\r
+/**\r
+ Allocates pages that are suitable for an DmaMap() of type\r
+ MapOperationBusMasterCommonBuffer mapping, at the requested alignment.\r
+\r
+ @param MemoryType The type of memory to allocate, EfiBootServicesData or\r
+ EfiRuntimeServicesData.\r
+ @param Pages The number of pages to allocate.\r
+ @param Alignment Alignment in bytes of the base of the returned\r
+ buffer (must be a power of 2)\r
+ @param HostAddress A pointer to store the base system memory address of the\r
+ allocated range.\r
+\r
+ @retval EFI_SUCCESS The requested memory pages were allocated.\r
+ @retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are\r
+ MEMORY_WRITE_COMBINE and MEMORY_CACHED.\r
+ @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r
+ @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+DmaAllocateAlignedBuffer (\r
+ IN EFI_MEMORY_TYPE MemoryType,\r
+ IN UINTN Pages,\r
+ IN UINTN Alignment,\r
+ OUT VOID **HostAddress\r
+ )\r
+{\r
+ if (Alignment == 0) {\r
+ Alignment = EFI_PAGE_SIZE;\r
+ }\r
+\r
+ if (HostAddress == NULL ||\r
+ (Alignment & (Alignment - 1)) != 0) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+\r
+ //\r
+ // The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData\r
+ //\r
+ if (MemoryType == EfiBootServicesData) {\r
+ *HostAddress = AllocateAlignedPages (Pages, Alignment);\r
+ } else if (MemoryType != EfiRuntimeServicesData) {\r
+ *HostAddress = AllocateAlignedRuntimePages (Pages, Alignment);\r
+ } else {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+\r
+ if (*HostAddress == NULL) {\r
+ return EFI_OUT_OF_RESOURCES;\r
+ }\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+\r
+/**\r
+ Frees memory that was allocated with DmaAllocateBuffer().\r
+\r
+ @param Pages The number of pages to free.\r
+ @param HostAddress The base system memory address of the allocated range.\r
+\r
+ @retval EFI_SUCCESS The requested memory pages were freed.\r
+ @retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages\r
+ was not allocated with DmaAllocateBuffer().\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+DmaFreeBuffer (\r
+ IN UINTN Pages,\r
+ IN VOID *HostAddress\r
+ )\r
+{\r
+ if (HostAddress == NULL) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+\r
+ FreePages (HostAddress, Pages);\r
+ return EFI_SUCCESS;\r
+}\r
+\r
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