將接續上一篇，繼續探討DXE部分。
AutoGen.h
typedef struct {
UINT32 PcdSetupConOutColumn_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0;
UINT32 PcdSetupConOutRow_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0;
DYNAMICEX_MAPPING ExMapTable[DXE_EXMAPPING_TABLE_SIZE];
UINT32 LocalTokenNumberTable[DXE_LOCAL_TOKEN_NUMBER_TABLE_SIZE];
GUID GuidTable[DXE_GUID_TABLE_SIZE];
STRING_HEAD PcdWinNtMemorySize_0d79a645_1d91_40a6_a81f_61e6982b32b4[1];
STRING_HEAD PcdWinNtPhysicalDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4[1];
STRING_HEAD PcdWinNtVirtualDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4[1];
STRING_HEAD PcdWinNtFileSystem_0d79a645_1d91_40a6_a81f_61e6982b32b4[1];
STRING_HEAD PcdWinNtSerialPort_0d79a645_1d91_40a6_a81f_61e6982b32b4[1];
STRING_HEAD PcdWinNtGop_0d79a645_1d91_40a6_a81f_61e6982b32b4[1];
STRING_HEAD PcdWinNtUga_0d79a645_1d91_40a6_a81f_61e6982b32b4[1];
STRING_HEAD PcdWinNtConsole_0d79a645_1d91_40a6_a81f_61e6982b32b4[1];
VARIABLE_HEAD PcdHardwareErrorRecordLevel_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header[1];
VARIABLE_HEAD PcdPlatformBootTimeOut_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header[1];
VARIABLE_HEAD PcdSetupConOutColumn_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header[1];
VARIABLE_HEAD PcdSetupConOutRow_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header[1];
UINT8 StringTable[12]; /* PcdWinNtMemorySize_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
UINT8 StringTable_1[100]; /* PcdWinNtPhysicalDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
UINT8 StringTable_2[26]; /* PcdWinNtVirtualDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
UINT8 StringTable_3[106]; /* PcdWinNtFileSystem_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
UINT8 StringTable_4[20]; /* PcdWinNtSerialPort_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
UINT8 StringTable_5[52]; /* PcdWinNtGop_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
UINT8 StringTable_6[52]; /* PcdWinNtUga_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
UINT8 StringTable_7[52]; /* PcdWinNtConsole_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
UINT8 StringTable_8[32]; /* PcdHardwareErrorRecordLevel_d3705011_bc19_4af7_be16_f68030378c15 */
UINT8 StringTable_9[16]; /* PcdPlatformBootTimeOut_d3705011_bc19_4af7_be16_f68030378c15 */
UINT8 StringTable_10[38]; /* PcdSetupConOutColumn_d3705011_bc19_4af7_be16_f68030378c15 */
SIZE_INFO SizeTable[DXE_SIZE_TABLE_SIZE];
UINT16 PcdHardwareErrorRecordLevel_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0;
UINT16 PcdPlatformBootTimeOut_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0;
BOOLEAN PcdBootState_d3705011_bc19_4af7_be16_f68030378c15[1];
UINT8 SkuIdTable[DXE_SKUID_TABLE_SIZE];
} DXE_PCD_DATABASE_INIT;
typedef struct {
UINT8 dummy; /* PCD_DATABASE_UNINIT is emptry */
} DXE_PCD_DATABASE_UNINIT;
typedef struct {
DXE_PCD_DATABASE_INIT Init;
DXE_PCD_DATABASE_UNINIT Uninit;
} DXE_PCD_DATABASE;
typedef struct {
PEI_PCD_DATABASE PeiDb;
DXE_PCD_DATABASE DxeDb;
} PCD_DATABASE;
AutoGen.c
DXE_PCD_DATABASE_INIT gDXEPcdDbInit = {
80U, /* PcdSetupConOutColumn_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0 */
25U, /* PcdSetupConOutRow_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0 */
/* VPD */
/* ExMapTable */
{
{ 0U, 0U, 0U },
},
/* LocalTokenNumberTable */
{
offsetof(DXE_PCD_DATABASE, Init.PcdWinNtMemorySize_0d79a645_1d91_40a6_a81f_61e6982b32b4) | PCD_TYPE_STRING,
offsetof(DXE_PCD_DATABASE, Init.PcdWinNtPhysicalDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4) | PCD_TYPE_STRING,
offsetof(DXE_PCD_DATABASE, Init.PcdWinNtVirtualDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4) | PCD_TYPE_STRING,
offsetof(DXE_PCD_DATABASE, Init.PcdWinNtFileSystem_0d79a645_1d91_40a6_a81f_61e6982b32b4) | PCD_TYPE_STRING,
offsetof(DXE_PCD_DATABASE, Init.PcdWinNtSerialPort_0d79a645_1d91_40a6_a81f_61e6982b32b4) | PCD_TYPE_STRING,
offsetof(DXE_PCD_DATABASE, Init.PcdWinNtGop_0d79a645_1d91_40a6_a81f_61e6982b32b4) | PCD_TYPE_STRING,
offsetof(DXE_PCD_DATABASE, Init.PcdWinNtUga_0d79a645_1d91_40a6_a81f_61e6982b32b4) | PCD_TYPE_STRING,
offsetof(DXE_PCD_DATABASE, Init.PcdWinNtConsole_0d79a645_1d91_40a6_a81f_61e6982b32b4) | PCD_TYPE_STRING,
offsetof(DXE_PCD_DATABASE, Init.PcdHardwareErrorRecordLevel_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header) | PCD_TYPE_HII | PCD_DATUM_TYPE_UINT16,
offsetof(DXE_PCD_DATABASE, Init.PcdPlatformBootTimeOut_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header) | PCD_TYPE_HII | PCD_DATUM_TYPE_UINT16,
offsetof(DXE_PCD_DATABASE, Init.PcdSetupConOutColumn_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header) | PCD_DATUM_TYPE_UINT32 | PCD_TYPE_HII,
offsetof(DXE_PCD_DATABASE, Init.PcdSetupConOutRow_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header) | PCD_DATUM_TYPE_UINT32 | PCD_TYPE_HII,
offsetof(DXE_PCD_DATABASE, Init.PcdBootState_d3705011_bc19_4af7_be16_f68030378c15) | PCD_DATUM_TYPE_UINT8 | PCD_TYPE_DATA,
},
/* GuidTable */
{
{ 0x8BE4DF61, 0x93CA, 0x11D2, { 0xAA, 0x0D, 0x00, 0xE0, 0x98, 0x03, 0x2B, 0x8C }},
},
{ 0U }, /* PcdWinNtMemorySize_0d79a645_1d91_40a6_a81f_61e6982b32b4[1] */
{ 12U }, /* PcdWinNtPhysicalDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4[1] */
{ 112U }, /* PcdWinNtVirtualDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4[1] */
{ 138U }, /* PcdWinNtFileSystem_0d79a645_1d91_40a6_a81f_61e6982b32b4[1] */
{ 244U }, /* PcdWinNtSerialPort_0d79a645_1d91_40a6_a81f_61e6982b32b4[1] */
{ 264U }, /* PcdWinNtGop_0d79a645_1d91_40a6_a81f_61e6982b32b4[1] */
{ 316U }, /* PcdWinNtUga_0d79a645_1d91_40a6_a81f_61e6982b32b4[1] */
{ 368U }, /* PcdWinNtConsole_0d79a645_1d91_40a6_a81f_61e6982b32b4[1] */
/* PcdHardwareErrorRecordLevel_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header[1] */
{
{ 420U, offsetof(DXE_PCD_DATABASE, Init.PcdHardwareErrorRecordLevel_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0), 0U, 0x0U }
},
/* PcdPlatformBootTimeOut_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header[1] */
{
{ 452U, offsetof(DXE_PCD_DATABASE, Init.PcdPlatformBootTimeOut_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0), 0U, 0x0U }
},
/* PcdSetupConOutColumn_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header[1] */
{
{ 468U, offsetof(DXE_PCD_DATABASE, Init.PcdSetupConOutColumn_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0), 0U, 0x0U }
},
/* PcdSetupConOutRow_d3705011_bc19_4af7_be16_f68030378c15_Variable_Header[1] */
{
{ 468U, offsetof(DXE_PCD_DATABASE, Init.PcdSetupConOutRow_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0), 0U, 0x4U }
},
/* StringTable */
{0x36, 0x00, 0x34, 0x00, 0x21, 0x00, 0x36, 0x00, 0x34, 0x00, 0x00, 0x00}, /* PcdWinNtMemorySize_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
{0x61, 0x00, 0x3a, 0x00, 0x52, 0x00, 0x57, 0x00, 0x3b, 0x00, 0x32, 0x00, 0x38, 0x00, 0x38, 0x00, 0x30, 0x00, 0x3b, 0x00, 0x35, 0x00, 0x31, 0x00, 0x32, 0x00, 0x21, 0x00, 0x64, 0x00, 0x3a, 0x00, 0x52, 0x00, 0x4f, 0x00, 0x3b, 0x00, 0x33, 0x00, 0x30, 0x00, 0x37, 0x00, 0x32, 0x00, 0x30, 0x00, 0x30, 0x00, 0x3b, 0x00, 0x32, 0x00, 0x30, 0x00, 0x34, 0x00, 0x38, 0x00, 0x21, 0x00, 0x6a, 0x00, 0x3a, 0x00, 0x52, 0x00, 0x57, 0x00, 0x3b, 0x00, 0x32, 0x00, 0x36, 0x00, 0x32, 0x00, 0x31, 0x00, 0x34, 0x00, 0x34, 0x00, 0x3b, 0x00, 0x35, 0x00, 0x31, 0x00, 0x32, 0x00, 0x00, 0x00}, /* PcdWinNtPhysicalDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
{0x46, 0x00, 0x57, 0x00, 0x3b, 0x00, 0x34, 0x00, 0x30, 0x00, 0x39, 0x00, 0x36, 0x00, 0x30, 0x00, 0x3b, 0x00, 0x35, 0x00, 0x31, 0x00, 0x32, 0x00, 0x00, 0x00}, /* PcdWinNtVirtualDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
{0x2e, 0x00, 0x21, 0x00, 0x2e, 0x00, 0x2e, 0x00, 0x5c, 0x00, 0x2e, 0x00, 0x2e, 0x00, 0x5c, 0x00, 0x2e, 0x00, 0x2e, 0x00, 0x5c, 0x00, 0x55, 0x00, 0x64, 0x00, 0x75, 0x00, 0x50, 0x00, 0x6b, 0x00, 0x67, 0x00, 0x5c, 0x00, 0x44, 0x00, 0x45, 0x00, 0x42, 0x00, 0x55, 0x00, 0x47, 0x00, 0x5f, 0x00, 0x56, 0x00, 0x53, 0x00, 0x32, 0x00, 0x30, 0x00, 0x31, 0x00, 0x32, 0x00, 0x78, 0x00, 0x38, 0x00, 0x36, 0x00, 0x5c, 0x00, 0x49, 0x00, 0x41, 0x00, 0x33, 0x00, 0x32, 0x00, 0x00, 0x00}, /* PcdWinNtFileSystem_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
{0x43, 0x00, 0x4f, 0x00, 0x4d, 0x00, 0x31, 0x00, 0x21, 0x00, 0x43, 0x00, 0x4f, 0x00, 0x4d, 0x00, 0x32, 0x00, 0x00, 0x00}, /* PcdWinNtSerialPort_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
{0x55, 0x00, 0x47, 0x00, 0x41, 0x00, 0x20, 0x00, 0x57, 0x00, 0x69, 0x00, 0x6e, 0x00, 0x64, 0x00, 0x6f, 0x00, 0x77, 0x00, 0x20, 0x00, 0x31, 0x00, 0x00, 0x00}, /* PcdWinNtGop_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
{0x55, 0x00, 0x47, 0x00, 0x41, 0x00, 0x20, 0x00, 0x57, 0x00, 0x69, 0x00, 0x6e, 0x00, 0x64, 0x00, 0x6f, 0x00, 0x77, 0x00, 0x20, 0x00, 0x31, 0x00, 0x00, 0x00}, /* PcdWinNtUga_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
{0x42, 0x00, 0x75, 0x00, 0x73, 0x00, 0x20, 0x00, 0x44, 0x00, 0x72, 0x00, 0x69, 0x00, 0x76, 0x00, 0x65, 0x00, 0x72, 0x00, 0x20, 0x00, 0x43, 0x00, 0x6f, 0x00, 0x6e, 0x00, 0x73, 0x00, 0x6f, 0x00, 0x6c, 0x00, 0x65, 0x00, 0x20, 0x00, 0x57, 0x00, 0x69, 0x00, 0x6e, 0x00, 0x64, 0x00, 0x6f, 0x00, 0x77, 0x00, 0x00, 0x00}, /* PcdWinNtConsole_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
{0x48, 0x00, 0x77, 0x00, 0x45, 0x00, 0x72, 0x00, 0x72, 0x00, 0x52, 0x00, 0x65, 0x00, 0x63, 0x00, 0x53, 0x00, 0x75, 0x00, 0x70, 0x00, 0x70, 0x00, 0x6f, 0x00, 0x72, 0x00, 0x74, 0x00, 0x00, 0x00}, /* PcdHardwareErrorRecordLevel_d3705011_bc19_4af7_be16_f68030378c15 */
{0x54, 0x00, 0x69, 0x00, 0x6d, 0x00, 0x65, 0x00, 0x6f, 0x00, 0x75, 0x00, 0x74, 0x00, 0x00, 0x00}, /* PcdPlatformBootTimeOut_d3705011_bc19_4af7_be16_f68030378c15 */
{0x53, 0x00, 0x65, 0x00, 0x74, 0x00, 0x75, 0x00, 0x70, 0x00, 0x43, 0x00, 0x6f, 0x00, 0x6e, 0x00, 0x73, 0x00, 0x6f, 0x00, 0x6c, 0x00, 0x65, 0x00, 0x43, 0x00, 0x6f, 0x00, 0x6e, 0x00, 0x66, 0x00, 0x69, 0x00, 0x67, 0x00, 0x00, 0x00}, /* PcdSetupConOutColumn_d3705011_bc19_4af7_be16_f68030378c15 */
/* SizeTable */
{
12U, 12U, /* PcdWinNtMemorySize_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
100U, 94U, /* PcdWinNtPhysicalDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
26U, 26U, /* PcdWinNtVirtualDisk_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
106U, 78U, /* PcdWinNtFileSystem_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
20U, 20U, /* PcdWinNtSerialPort_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
52U, 26U, /* PcdWinNtGop_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
52U, 26U, /* PcdWinNtUga_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
52U, 52U, /* PcdWinNtConsole_0d79a645_1d91_40a6_a81f_61e6982b32b4 */
},
1U, /* PcdHardwareErrorRecordLevel_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0 */
10U, /* PcdPlatformBootTimeOut_d3705011_bc19_4af7_be16_f68030378c15_VariableDefault_0 */
{ 1U }, /* PcdBootState_d3705011_bc19_4af7_be16_f68030378c15[1] */
/* SkuIdTable */
{ 0U, },
};
以上是在Compile過程中，Build Tool為PCD DXE所生成的檔案，跟PEIM的很相似，但多了一些沒看過的PCD。。
上面有個PCD_DATABASE，裡面分了PeiDb與DxeDb，在一開始的EntryPoint中會呼叫
BuildPcdDxeDataBase，並把PEI_PCD_DATABASE從HOB複製過來。
PCD DXE的
GetWorker與
SetWorker。
GetWorker:
VOID *
GetWorker (
IN UINTN TokenNumber,
IN UINTN GetSize
)
在一開始會做一些前置處理，判斷傳進來的TokenNumber判斷是PEI的PCD還是DXE的PCD。
然後把對應的LocalTokenNumber、LocalTokenNumber、StringTable、PcdDb的Pointer另取出來。
IsPeiDb = (BOOLEAN) ((TokenNumber + 1 < PEI_LOCAL_TOKEN_NUMBER + 1) ? TRUE : FALSE);
透過Mask單獨取得Offset。
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
接下來會依照各種不同PCD Type做不同的處理：
PCD_TYPE_VPD:
傳回VPD (
Vital Product Data)中特定的Offset的資料。
VPD_HEAD *VpdHead;
VpdHead = (VPD_HEAD *) ((UINT8 *)PeiPcdDb + Offset);
return (VOID *) (UINTN) (PcdGet32 (PcdVpdBaseAddress) + VpdHead->Offset);
PCD_TYPE_HII|PCD_TYPE_STRING:
PCD_TYPE_HII:
透過Offset取得Variable Head，裡面有著GUID與Name的Index。
VariableHead = (VARIABLE_HEAD *) ((UINT8 *)PeiPcdDb + Offset);
Guid = &(PeiPcdDb->Init.GuidTable[VariableHead->GuidTableIndex]);
Name = (UINT16*)&StringTable[VariableHead->StringIndex];
會先判斷是否為PCD_TYPE_HII|PCD_TYPE_STRING或PCD_TYPE_HII，再去做不同的處理，差別只是在於在GetVariable失敗時，
PCD_TYPE_HII|PCD_TYPE_STRING會於StringTable取得預設的資料（字串），而PCD_TYPE_HII會直接以DefaultValueOffset去取得對應的預設值。
if ((LocalTokenNumber & PCD_TYPE_ALL_SET) == (PCD_TYPE_HII|PCD_TYPE_STRING)) {
StringTableIdx = *(STRING_HEAD*)((UINT8 *) PcdDb + VariableHead->DefaultValueOffset);
VaraiableDefaultBuffer = (VOID *) (StringTable + StringTableIdx);
...
} else {
VaraiableDefaultBuffer = (UINT8 *) PcdDb + VariableHead->DefaultValueOffset;
...
}
PCD_TYPE_STRING:
先取得該PCD的STRING_HEAD (StringTableIdx (UINT32))，裡面存放著對應StringTable的Offset。
StringTableIdx = * (STRING_HEAD*) ((UINT8 *) PeiPcdDb + Offset);
return (VOID *) (&StringTable[StringTableIdx]);
PCD_TYPE_DATA:
直接透過Offset取得Data。
return (VOID *) ((UINT8 *)PeiPcdDb + Offset);
SetWorker:
EFI_STATUS
SetWorker (
IN UINTN TokenNumber,
IN VOID *Data,
IN OUT UINTN *Size,
IN BOOLEAN PtrType
)
透過Token Number取得該PCD的LocalTokenNumber (Offset、PCD Type、Data Type)。
LocalTokenNumber = PeiPcdDb->Init.LocalTokenNumberTable[TokenNumber];
會先判斷Data Type是不是Pointer，通常像String之類的，會被歸類為Pointer。
要注意到在Build Tool會在PCD Database中，先宣告好固定長度的陣列來存放String等其它Data。
如果PtrType為True，而傳入的Size又大於原先預留好的最大值的話，就會造成問題，這邊就先擋掉並回傳MaxSize。
if (PtrType) {
//
// Get MaxSize first, then check new size with max buffer size.
//
GetPtrTypeSize (TokenNumber, &MaxSize, PeiPcdDb);
if (*Size > MaxSize) {
*Size = MaxSize;
return EFI_INVALID_PARAMETER;
}
} else {
if (*Size != PeiPcdGetSize (TokenNumber + 1)) {
return EFI_INVALID_PARAMETER;
}
}
當某個PCD被修改時會去呼叫，為該PCD註冊Notify的Function。
可以透過PCD Library的LibPcdCallbackOnSet來進行註冊會比較方便。
if ((TokenNumber + 1 < PEI_NEX_TOKEN_NUMBER + 1) || (TokenNumber + 1 >= PEI_LOCAL_TOKEN_NUMBER + 1 || TokenNumber + 1 < (PEI_LOCAL_TOKEN_NUMBER + DXE_NEX_TOKEN_NUMBER + 1))) {
InvokeCallbackOnSet (0, NULL, TokenNumber + 1, Data, *Size);
}
跟GetWorker一樣會判斷傳進來的TokenNumber判斷是PEI的PCD還是DXE的PCD。
然後把對應的LocalTokenNumber、LocalTokenNumber、StringTable、PcdDb的Pointer另取出來。
透過Mask單獨取得Offset，並取得Data。
Offset = LocalTokenNumber & PCD_DATABASE_OFFSET_MASK;
InternalData = (VOID *) ((UINT8 *) PeiPcdDb + Offset);
接下來會依照各種不同PCD Type做不同的處理：
PCD_TYPE_VPD:
可能是上述幾個Type都不支援在PEI修改NVS，所以這邊就直接return回EFI_INVALID_PARAMETER。
PCD_TYPE_STRING:
傳入的資料為一串Array，資料長度可能會變動，所以先更改Current Size。
SizeTable中有兩個欄位，一個是Max Size，一個是Current Size。
之後再透過CopyMem，將傳入的Data Copy到StringTable中。
if (SetPtrTypeSize (TokenNumber, Size, PeiPcdDb)) {
CopyMem (StringTable + *((STRING_HEAD *)InternalData), Data, *Size);
return EFI_SUCCESS;
} else {
return EFI_INVALID_PARAMETER;
}
PCD_TYPE_HII:
PCD_TYPE_HII|PCD_TYPE_STRING:
透過SetVariable將資料存於NVS並更新PCD Database內的資料。
VariableHead = (VARIABLE_HEAD *) (PcdDb + Offset);
Guid = GuidTable + VariableHead->GuidTableIndex;
Name = (UINT16*) (StringTable + VariableHead->StringIndex);
VariableOffset = VariableHead->Offset;
Status = SetHiiVariable (Guid, Name, Data, *Size, VariableOffset);
if (EFI_NOT_FOUND == Status) {
if ((LocalTokenNumber & PCD_TYPE_ALL_SET) == (PCD_TYPE_HII|PCD_TYPE_STRING)) {
CopyMem (StringTable + *(STRING_HEAD *)(PcdDb + VariableHead->DefaultValueOffset), Data, *Size);
} else {
CopyMem (PcdDb + VariableHead->DefaultValueOffset, Data, *Size);
}
Status = EFI_SUCCESS;
}
PCD_TYPE_DATA:
PtrType的處理方式跟PCD_TYPE_STRING很像。
if (PtrType) {
if (SetPtrTypeSize (TokenNumber, Size, PeiPcdDb)) {
CopyMem (InternalData, Data, *Size);
return EFI_SUCCESS;
} else {
return EFI_INVALID_PARAMETER;
}
}
其餘基本型態只是透過轉型來處理。
switch (*Size) {
case sizeof(UINT8):
*((UINT8 *) InternalData) = *((UINT8 *) Data);
return EFI_SUCCESS;
case sizeof(UINT16):
*((UINT16 *) InternalData) = *((UINT16 *) Data);
return EFI_SUCCESS;
case sizeof(UINT32):
*((UINT32 *) InternalData) = *((UINT32 *) Data);
return EFI_SUCCESS;
case sizeof(UINT64):
*((UINT64 *) InternalData) = *((UINT64 *) Data);
return EFI_SUCCESS;
default:
ASSERT (FALSE);
return EFI_NOT_FOUND;
}
