MdeModulePkg: Update PCD driver to support the optimized PcdDataBase

[mirror_edk2.git] / MdeModulePkg / Include / Guid / PcdDataBaseSignatureGuid.h

diff --git a/MdeModulePkg/Include/Guid/PcdDataBaseSignatureGuid.h b/MdeModulePkg/Include/Guid/PcdDataBaseSignatureGuid.h
index 9b1cb22bbbd481a40542de1e247935a9b680fac5..d670af14e909c3859a58a223f5db80c50e7e73d2 100644 (file)
--- a/MdeModulePkg/Include/Guid/PcdDataBaseSignatureGuid.h
+++ b/MdeModulePkg/Include/Guid/PcdDataBaseSignatureGuid.h
@@ -61,11 +61,6 @@ typedef struct  {
   UINT16  ExGuidIndex;          // Index of GuidTable in units of GUID.\r
 } DYNAMICEX_MAPPING;\r
 \r
-typedef struct {\r
-  UINT32  SkuDataStartOffset;   // Offset(with DATUM TYPE info) from the PCD_DB.\r
-  UINT32  SkuIdTableOffset;     // Offset from the PCD_DB.\r
-} SKU_HEAD;\r
-\r
 typedef struct {\r
   UINT32  StringIndex;          // Offset in String Table in units of UINT8.\r
   UINT32  DefaultValueOffset;   // Offset of the Default Value.\r
@@ -94,8 +89,9 @@ typedef UINT32 TABLE_OFFSET;
 typedef struct {\r
     GUID                  Signature;            // PcdDataBaseGuid.\r
     UINT32                BuildVersion;\r
-    UINT32                Length;\r
+    UINT32                Length;               // Length of DEFAULT SKU PCD DB\r
     SKU_ID                SystemSkuId;          // Current SkuId value.\r
+    UINT32                LengthForAllSkus;     // Length of all SKU PCD DB\r
     UINT32                UninitDataBaseSize;   // Total size for PCD those default value with 0.\r
     TABLE_OFFSET          LocalTokenNumberTableOffset;\r
     TABLE_OFFSET          ExMapTableOffset;\r
@@ -107,7 +103,7 @@ typedef struct {
     UINT16                LocalTokenCount;      // LOCAL_TOKEN_NUMBER for all.\r
     UINT16                ExTokenCount;         // EX_TOKEN_NUMBER for DynamicEx.\r
     UINT16                GuidTableCount;       // The Number of Guid in GuidTable.\r
-    UINT8                 Pad[2];               // Pad bytes to satisfy the alignment.\r
+    UINT8                 Pad[6];               // Pad bytes to satisfy the alignment.\r
 \r
     //\r
     // Default initialized external PCD database binary structure\r
@@ -115,7 +111,6 @@ typedef struct {
     // Padding is needed to keep necessary alignment\r
     //\r
     //SKU_ID                         SkuIdTable[];            // SkuIds system supports.\r
-    //SKU_ID                         SkuIndexTable[];         // SkuIds for each PCD with SKU enable.\r
     //UINT64                         ValueUint64[];\r
     //UINT32                         ValueUint32[];\r
     //VPD_HEAD                       VpdHead[];               // VPD Offset\r
@@ -125,7 +120,6 @@ typedef struct {
     //STRING_HEAD                    StringHead[];            // String PCD\r
     //PCD_NAME_INDEX                 PcdNameTable[];          // PCD name index info. It can be accessed by the PcdNameTableOffset.\r
     //VARIABLE_HEAD                  VariableHead[];          // HII PCD\r
-    //SKU_HEAD                       SkuHead[];               // Store SKU info for each PCD with SKU enable.\r
     //UINT8                          StringTable[];           // String for String PCD value and HII PCD Variable Name. It can be accessed by StringTableOffset.\r
     //SIZE_INFO                      SizeTable[];             // MaxSize and CurSize for String PCD. It can be accessed by SizeTableOffset.\r
     //UINT16                         ValueUint16[];\r
@@ -216,4 +210,26 @@ typedef struct {
 // +-------------------------------------+\r
 //\r
 \r
+#pragma pack(1)\r
+typedef struct {\r
+  SKU_ID    SkuId;\r
+  SKU_ID    SkuIdCompared;\r
+  UINT32    Length;\r
+  // PCD_DATA_DELTA   DeltaData[]\r
+} PCD_DATABASE_SKU_DELTA;\r
+\r
+//\r
+// PCD database layout:\r
+// +---------------------------------+\r
+// | PCD_DATABASE_INIT (DEFAULT SKU) |\r
+// +---------------------------------+\r
+// | PCD_DATABASE_SKU_DELTA (SKU A)  |\r
+// +---------------------------------+\r
+// | PCD_DATABASE_SKU_DELTA (SKU B)  |\r
+// +---------------------------------+\r
+// | ......                          |\r
+// +---------------------------------+\r
+//\r
+#pragma pack()\r
+\r
 #endif\r