1 files changed, 37 insertions, 40 deletions
diff --git a/MdePkg/Include/Uefi/UefiSpec.h b/MdePkg/Include/Uefi/UefiSpec.h
index ffdfcd6398..0dbabd8d63 100644
--- a/MdePkg/Include/Uefi/UefiSpec.h
+++ b/MdePkg/Include/Uefi/UefiSpec.h
@@ -2011,50 +2011,46 @@ EFI_STATUS
 ///
 /// EFI Boot Key Data
 ///
-typedef union {
-  struct {
-    ///
-    /// Indicates the revision of the EFI_KEY_OPTION structure. This revision level should be 0.
-    ///
-    UINT32  Revision        : 8;
-    ///
-    /// Either the left or right Shift keys must be pressed (1) or must not be pressed (0).
-    ///
-    UINT32  ShiftPressed    : 1;
-    ///
-    /// Either the left or right Control keys must be pressed (1) or must not be pressed (0).
-    ///
-    UINT32  ControlPressed  : 1;
-    ///
-    /// Either the left or right Alt keys must be pressed (1) or must not be pressed (0).
-    ///
-    UINT32  AltPressed      : 1;
-    ///
-    /// Either the left or right Logo keys must be pressed (1) or must not be pressed (0).
-    ///
-    UINT32  LogoPressed     : 1;
-    ///
-    /// The Menu key must be pressed (1) or must not be pressed (0).
-    ///
-    UINT32  MenuPressed     : 1;
-    ///
-    /// The SysReq key must be pressed (1) or must not be pressed (0).
-    ///
-    UINT32  SysReqPressed    : 1;
-    UINT32  Reserved        : 16;
-    ///
-    /// Specifies the actual number of entries in EFI_KEY_OPTION.Keys, from 0-3. If
-    /// zero, then only the shift state is considered. If more than one, then the boot option will
-    /// only be launched if all of the specified keys are pressed with the same shift state.
-    ///
-    UINT32  InputKeyCount   : 2;
-  } Options;
-  UINT32  PackedValue;
-} EFI_BOOT_KEY_DATA;
+typedef UINT32 EFI_BOOT_KEY_DATA;
+///
+/// Indicates the revision of the EFI_KEY_OPTION structure. This revision level should be 0.
+///
+#define EFI_KEY_OPTION_REVISION_MASK        0x000000FF
+///
+/// Either the left or right Shift keys must be pressed (1) or must not be pressed (0).
+///
+#define EFI_KEY_OPTION_SHIFT_PRESSED_MASK   BIT8
+///
+/// Either the left or right Control keys must be pressed (1) or must not be pressed (0).
+///
+#define EFI_KEY_OPTION_CONTROL_PRESSED_MASK BIT9
+///
+/// Either the left or right Alt keys must be pressed (1) or must not be pressed (0).
+///
+#define EFI_KEY_OPTION_ALT_PRESSED_MASK     BIT10
+///
+/// Either the left or right Logo keys must be pressed (1) or must not be pressed (0).
+///
+#define EFI_KEY_OPTION_LOGO_PRESSED_MASK    BIT11
+///
+/// The Menu key must be pressed (1) or must not be pressed (0).
+///
+#define EFI_KEY_OPTION_MENU_PRESSED_MASK    BIT12
+///
+/// The SysReq key must be pressed (1) or must not be pressed (0).
+///
+#define EFI_KEY_OPTION_SYS_REQ_PRESSED_MASK BIT13
+///
+/// Specifies the actual number of entries in EFI_KEY_OPTION.Keys, from 0-3. If
+/// zero, then only the shift state is considered. If more than one, then the boot option will
+/// only be launched if all of the specified keys are pressed with the same shift state.
+///
+#define EFI_KEY_OPTION_INPUT_KEY_COUNT_MASK (BIT30 | BIT31)
 
 ///
 /// EFI Key Option.
 ///
+#pragma pack(1)
 typedef struct {
   ///
   /// Specifies options about how the key will be processed.
@@ -2078,6 +2074,7 @@ typedef struct {
   ///
   //EFI_INPUT_KEY      Keys[];
 } EFI_KEY_OPTION;
+#pragma pack()
 
 //
 // EFI File location to boot from on removable media devices