1 files changed, 109 insertions, 0 deletions
diff --git a/Silicon/Hisilicon/Library/I2CLib/I2CLibRuntime.c b/Silicon/Hisilicon/Library/I2CLib/I2CLibRuntime.c
new file mode 100644
index 0000000000..678b5a0082
--- /dev/null
+++ b/Silicon/Hisilicon/Library/I2CLib/I2CLibRuntime.c
@@ -0,0 +1,109 @@
+/** @file
+*
+*  Copyright (c) 2015, Hisilicon Limited. All rights reserved.
+*  Copyright (c) 2015, Linaro Limited. 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 <PiDxe.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/BaseLib.h>
+#include <Library/UefiRuntimeLib.h>
+#include <Library/DxeServicesTableLib.h>
+#include <Guid/EventGroup.h>
+
+#include <Library/PlatformSysCtrlLib.h>
+#include "I2CLibInternal.h"
+
+STATIC EFI_EVENT              mI2cLibVirtualAddrChangeEvent;
+
+STATIC UINTN gI2cBase[MAX_SOCKET][I2C_PORT_MAX];
+
+UINTN GetI2cBase (UINT32 Socket, UINT8 Port)
+{
+  if (gI2cBase[Socket][Port] == 0) {
+    gI2cBase[Socket][Port] = PlatformGetI2cBase(Socket, Port);
+  }
+
+  return gI2cBase[Socket][Port];
+}
+
+VOID
+EFIAPI
+I2cLibVirtualNotifyEvent (
+  IN EFI_EVENT        Event,
+  IN VOID             *Context
+  )
+{
+  UINT32 Socket;
+  UINT8  Port;
+
+  // We assume that all I2C ports used in one runtime driver need to be
+  // converted into virtual address.
+  for (Socket = 0; Socket < MAX_SOCKET; Socket++) {
+    for (Port = 0; Port < I2C_PORT_MAX; Port++) {
+      if (gI2cBase[Socket][Port] != 0) {
+        EfiConvertPointer (0x0, (VOID **)&gI2cBase[Socket][Port]);
+      }
+    }
+  }
+
+  return;
+}
+
+EFI_STATUS
+I2cLibRuntimeSetup (UINT32 Socket, UINT8 Port)
+{
+  EFI_STATUS Status;
+
+  UINTN Base = GetI2cBase (Socket, Port);
+
+  // Declare the controller as EFI_MEMORY_RUNTIME
+  Status = gDS->AddMemorySpace (
+      EfiGcdMemoryTypeMemoryMappedIo,
+      Base, SIZE_64KB,
+      EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
+      );
+  if (EFI_ERROR (Status)) {
+    DEBUG ((EFI_D_WARN, "[%a:%d] AddMemorySpace failed: %r\n", __FUNCTION__, __LINE__, Status));
+  }
+
+  Status = gDS->SetMemorySpaceAttributes (Base, SIZE_64KB, EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((EFI_D_ERROR, "[%a:%d] SetMemorySpaceAttributes failed: %r\n", __FUNCTION__, __LINE__, Status));
+    return Status;
+  }
+
+  //
+  // Register for the virtual address change event
+  //
+  // Only create event once
+  if (mI2cLibVirtualAddrChangeEvent == NULL) {
+    Status = gBS->CreateEventEx (
+        EVT_NOTIFY_SIGNAL,
+        TPL_NOTIFY,
+        I2cLibVirtualNotifyEvent,
+        NULL,
+        &gEfiEventVirtualAddressChangeGuid,
+        &mI2cLibVirtualAddrChangeEvent
+    );
+    if (EFI_ERROR (Status)) {
+      DEBUG ((EFI_D_ERROR, "[%a:%d] Create event failed: %r\n", __FUNCTION__, __LINE__, Status));
+      return Status;
+    }
+  }
+
+  return EFI_SUCCESS;
+}
+
+