ArmPkg/BdsLib: Move some functions used to create/update BDS Boot Entry from ArmPlatformPkg/Bds to ArmPkg/BdsLib

These functions can be reused by any EFI application to add/update a BDS Boot Entry.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12314 6f19259b-4bc3-4df7-8a09-765794883524

3 files changed, 70 insertions, 11 deletions

diff --git a/ArmPkg/Library/BdsLib/BdsHelper.c b/ArmPkg/Library/BdsLib/BdsHelper.c
index a006e90..d971a76 100644
--- a/ArmPkg/Library/BdsLib/BdsHelper.c
+++ b/ArmPkg/Library/BdsLib/BdsHelper.c
@@ -289,3 +289,56 @@ PrintPerformance (
   CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Total Time = %ld ms\n\n", DivU64x64Remainder (MultU64x32 (TimeStamp, 1000), TicksPerSecond, NULL));
   SerialPortWrite ((UINT8 *) Buffer, CharCount);
 }
+
+EFI_STATUS
+GetEnvironmentVariable (
+  IN     CONST CHAR16*   VariableName,
+  IN     VOID*           DefaultValue,
+  IN OUT UINTN*          Size,
+  OUT    VOID**          Value
+  )
+{
+  EFI_STATUS  Status;
+  UINTN       VariableSize;
+
+  // Try to get the variable size.
+  *Value = NULL;
+  VariableSize = 0;
+  Status = gRT->GetVariable ((CHAR16 *) VariableName, &gEfiGlobalVariableGuid, NULL, &VariableSize, *Value);
+  if (Status == EFI_NOT_FOUND) {
+    if ((DefaultValue != NULL) && (Size != NULL) && (*Size != 0)) {
+      // If the environment variable does not exist yet then set it with the default value
+      Status = gRT->SetVariable (
+                    (CHAR16*)VariableName,
+                    &gEfiGlobalVariableGuid,
+                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
+                    *Size,
+                    DefaultValue
+                    );
+      *Value = DefaultValue;
+    } else {
+      return EFI_NOT_FOUND;
+    }
+  } else if (Status == EFI_BUFFER_TOO_SMALL) {
+    // Get the environment variable value
+    *Value = AllocatePool (VariableSize);
+    if (*Value == NULL) {
+      return EFI_OUT_OF_RESOURCES;
+    }
+
+    Status = gRT->GetVariable ((CHAR16 *)VariableName, &gEfiGlobalVariableGuid, NULL, &VariableSize, *Value);
+    if (EFI_ERROR (Status)) {
+      FreePool(*Value);
+      return EFI_INVALID_PARAMETER;
+    }
+
+    if (Size) {
+      *Size = VariableSize;
+    }
+  } else {
+    *Value = DefaultValue;
+    return Status;
+  }
+
+  return EFI_SUCCESS;
+}
diff --git a/ArmPkg/Library/BdsLib/BdsInternal.h b/ArmPkg/Library/BdsLib/BdsInternal.h
index af69049..d450e8e 100644
--- a/ArmPkg/Library/BdsLib/BdsInternal.h
+++ b/ArmPkg/Library/BdsLib/BdsInternal.h
@@ -25,7 +25,10 @@
 #include <Library/DebugLib.h>
 #include <Library/BdsLib.h>
 #include <Library/PerformanceLib.h>
+#include <Library/PrintLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
 
+#include <Guid/GlobalVariable.h>
 #include <Guid/FileInfo.h>
 
 #include <Protocol/DevicePath.h>
@@ -37,19 +40,19 @@
 
 
 typedef BOOLEAN (*BDS_FILE_LOADER_SUPPORT) (
-    IN EFI_DEVICE_PATH            *DevicePath,
-    IN EFI_HANDLE                 Handle,
-    IN EFI_DEVICE_PATH            *RemainingDevicePath
-    );
+  IN EFI_DEVICE_PATH            *DevicePath,
+  IN EFI_HANDLE                 Handle,
+  IN EFI_DEVICE_PATH            *RemainingDevicePath
+  );
 
 typedef EFI_STATUS (*BDS_FILE_LOADER_LOAD_IMAGE) (
-    IN     EFI_DEVICE_PATH        *DevicePath,
-    IN     EFI_HANDLE             Handle,
-    IN     EFI_DEVICE_PATH        *RemainingDevicePath,
-    IN     EFI_ALLOCATE_TYPE      Type,
-    IN OUT EFI_PHYSICAL_ADDRESS*  Image,
-    OUT    UINTN                  *ImageSize
-    );
+  IN     EFI_DEVICE_PATH        *DevicePath,
+  IN     EFI_HANDLE             Handle,
+  IN     EFI_DEVICE_PATH        *RemainingDevicePath,
+  IN     EFI_ALLOCATE_TYPE      Type,
+  IN OUT EFI_PHYSICAL_ADDRESS*  Image,
+  OUT    UINTN                  *ImageSize
+  );
 
 typedef struct {
   BDS_FILE_LOADER_SUPPORT     Support;
@@ -78,6 +81,7 @@ VOID
 PrintPerformance (
   VOID
   );
+
 EFI_STATUS
 BdsLoadImage (
   IN     EFI_DEVICE_PATH       *DevicePath,
diff --git a/ArmPkg/Library/BdsLib/BdsLib.inf b/ArmPkg/Library/BdsLib/BdsLib.inf
index b9b2006..595e943 100644
--- a/ArmPkg/Library/BdsLib/BdsLib.inf
+++ b/ArmPkg/Library/BdsLib/BdsLib.inf
@@ -24,6 +24,7 @@
   BdsLinuxLoader.c
   BdsAppLoader.c
   BdsHelper.c
+  BdsLoadOption.c
 
 [Packages]
   MdePkg/MdePkg.dec
@@ -52,6 +53,7 @@
   gEfiPxeBaseCodeProtocolGuid
   gEfiDiskIoProtocolGuid
   gEfiUsbIoProtocolGuid
+  gEfiLoadedImageProtocolGuid
     
 [FeaturePcd]