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MdeModulePkg: Enable Firmware to retrieve the default setting

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https://bugzilla.tianocore.org/show_bug.cgi?id=611
Add two PCDs and new PCD DB format definition

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
This commit is contained in:
Liming Gao
2017-12-22 11:50:49 +08:00
parent a37044efba
commit fef4cfa7ca
3 changed files with 89 additions and 0 deletions
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69
MdeModulePkg/Include/Guid/PcdDataBaseSignatureGuid.h
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@@ -146,5 +146,74 @@ typedef struct {
DXE_PCD_DATABASE *DxeDb;
} PCD_DATABASE;
typedef struct {
UINT32 Offset:24;
UINT32 Value:8;
} PCD_DATA_DELTA;
typedef struct {
SKU_ID SkuId;
UINT16 DefaultId;
UINT8 Reserved[6];
} PCD_DEFAULT_INFO;
typedef struct {
//
// Full size, it must be at 8 byte alignment.
//
UINT32 DataSize;
//
// HeaderSize includes HeaderSize fields and DefaultInfo arrays
//
UINT32 HeaderSize;
//
// DefaultInfo arrays those have the same default setting.
//
PCD_DEFAULT_INFO DefaultInfo[1];
//
// Default data is stored as variable storage or the array of DATA_DELTA.
//
} PCD_DEFAULT_DATA;
#define PCD_NV_STORE_DEFAULT_BUFFER_SIGNATURE SIGNATURE_32('N', 'S', 'D', 'B')
typedef struct {
//
// PCD_NV_STORE_DEFAULT_BUFFER_SIGNATURE
//
UINT32 Signature;
//
// Length of the taken default buffer
//
UINT32 Length;
//
// Length of the total reserved buffer
//
UINT32 MaxLength;
//
// Reserved for 8 byte alignment
//
UINT32 Reserved;
// one or more PCD_DEFAULT_DATA
} PCD_NV_STORE_DEFAULT_BUFFER_HEADER;
//
// NvStoreDefaultValueBuffer layout:
// +-------------------------------------+
// | PCD_NV_STORE_DEFAULT_BUFFER_HEADER |
// +-------------------------------------+
// | PCD_DEFAULT_DATA (DEFAULT, Standard)|
// +-------------------------------------+
// | PCD_DATA_DELTA (DEFAULT, Standard)|
// +-------------------------------------+
// | ...... |
// +-------------------------------------+
// | PCD_DEFAULT_DATA (SKU A, Standard) |
// +-------------------------------------+
// | PCD_DATA_DELTA (SKU A, Standard) |
// +-------------------------------------+
// | ...... |
// +-------------------------------------+
//
#endif