diff options
Diffstat (limited to 'Omap35xxPkg/Library/OmapDmaLib/OmapDmaLib.c')
| -rwxr-xr-x | Omap35xxPkg/Library/OmapDmaLib/OmapDmaLib.c | 248 |
1 files changed, 2 insertions, 246 deletions
diff --git a/Omap35xxPkg/Library/OmapDmaLib/OmapDmaLib.c b/Omap35xxPkg/Library/OmapDmaLib/OmapDmaLib.c index 27617fa09e..d1183129a6 100755 --- a/Omap35xxPkg/Library/OmapDmaLib/OmapDmaLib.c +++ b/Omap35xxPkg/Library/OmapDmaLib/OmapDmaLib.c @@ -1,6 +1,6 @@ /** @file
- OMAP35xx DMA abstractions modeled on PCI IO protocol. EnableDma()/DisableDma()
- are from OMAP35xx TRM.
+ Abstractions for simple OMAP DMA channel.
+
Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
@@ -17,28 +17,10 @@ #include <Base.h>
#include <Library/DebugLib.h>
#include <Library/OmapDmaLib.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 <Omap3530/Omap3530.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;
/**
Configure OMAP DMA Channel
@@ -192,229 +174,3 @@ DisableDmaChannel ( -/**
- 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
-OmapDmaLibConstructor (
- 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;
-}
-
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