[mirror_edk2.git] / MdeModulePkg / Universal / Network / UefiPxeBcDxe / PxeBcSupport.c

/** @file\r
  Support routines for PxeBc.\r
\r
Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
\r
#include "PxeBcImpl.h"\r
\r
\r
/**\r
  This function returns SMBIOS string given the string number.\r
\r
  @param  Smbios              Pointer to SMBIOS structure\r
  @param  StringNumber        String number to return. 0 is used to skip all\r
                              strings and  point to the next SMBIOS structure.\r
\r
  @return Pointer to string, or pointer to next SMBIOS strcuture if StringNumber == 0\r
\r
**/\r
CHAR8 *\r
GetSmbiosString (\r
  IN  SMBIOS_STRUCTURE_POINTER  *Smbios,\r
  IN  UINT16                    StringNumber\r
  )\r
{\r
  UINT16  Index;\r
  CHAR8   *String;\r
\r
  //\r
  // Skip over formatted section\r
  //\r
  String = (CHAR8 *) (Smbios->Raw + Smbios->Hdr->Length);\r
\r
  //\r
  // Look through unformated section\r
  //\r
  for (Index = 1; Index <= StringNumber || StringNumber == 0; Index++) {\r
    if (StringNumber == Index) {\r
      return String;\r
    }\r
    //\r
    // Skip string\r
    //\r
    for (; *String != 0; String++)\r
      ;\r
    String++;\r
\r
    if (*String == 0) {\r
      //\r
      // If double NULL then we are done.\r
      //  Return pointer to next structure in Smbios.\r
      //  if you pass in a 0 you will always get here\r
      //\r
      Smbios->Raw = (UINT8 *)++String;\r
      return NULL;\r
    }\r
  }\r
\r
  return NULL;\r
}\r
\r
\r
/**\r
  This function gets system guid and serial number from the smbios table.\r
\r
  @param  SystemGuid          The pointer of returned system guid.\r
  @param  SystemSerialNumber  The pointer of returned system serial number.\r
\r
  @retval EFI_SUCCESS         Successfully get the system guid and system serial\r
                              number.\r
  @retval EFI_NOT_FOUND       Not find the SMBIOS table.\r
\r
**/\r
EFI_STATUS\r
GetSmbiosSystemGuidAndSerialNumber (\r
  IN  EFI_GUID  *SystemGuid,\r
  OUT CHAR8     **SystemSerialNumber\r
  )\r
{\r
  EFI_STATUS                Status;\r
  SMBIOS_TABLE_ENTRY_POINT  *SmbiosTable;\r
  SMBIOS_STRUCTURE_POINTER  Smbios;\r
  SMBIOS_STRUCTURE_POINTER  SmbiosEnd;\r
  UINT16                    Index;\r
\r
  Status = EfiGetSystemConfigurationTable (&gEfiSmbiosTableGuid, (VOID **) &SmbiosTable);\r
\r
  if (EFI_ERROR (Status)) {\r
    return EFI_NOT_FOUND;\r
  }\r
  ASSERT (SmbiosTable != NULL);\r
\r
  Smbios.Hdr    = (SMBIOS_STRUCTURE *) (UINTN) SmbiosTable->TableAddress;\r
  SmbiosEnd.Raw = (UINT8 *) (UINTN) (SmbiosTable->TableAddress + SmbiosTable->TableLength);\r
\r
  for (Index = 0; Index < SmbiosTable->TableLength; Index++) {\r
    if (Smbios.Hdr->Type == 1) {\r
      if (Smbios.Hdr->Length < 0x19) {\r
        //\r
        // Older version did not support Guid and Serial number\r
        //\r
        continue;\r
      }\r
      //\r
      // SMBIOS tables are byte packed so we need to do a byte copy to\r
      // prevend alignment faults on Itanium-based platform.\r
      //\r
      CopyMem (SystemGuid, &Smbios.Type1->Uuid, sizeof (EFI_GUID));\r
      *SystemSerialNumber = GetSmbiosString (&Smbios, Smbios.Type1->SerialNumber);\r
\r
      return EFI_SUCCESS;\r
    }\r
    //\r
    // Make Smbios point to the next record\r
    //\r
    GetSmbiosString (&Smbios, 0);\r
\r
    if (Smbios.Raw >= SmbiosEnd.Raw) {\r
      //\r
      // SMBIOS 2.1 incorrectly stated the length of SmbiosTable as 0x1e.\r
      // given this we must double check against the length of the structure.\r
      //\r
      return EFI_SUCCESS;\r
    }\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
\r
/**\r
  The common notify function associated with various PxeBc events.\r
\r
  @param  Event     The event signaled.\r
  @param  Context   The context.\r
\r
**/\r
VOID\r
EFIAPI\r
PxeBcCommonNotify (\r
  IN EFI_EVENT           Event,\r
  IN VOID                *Context\r
  )\r
{\r
  *((BOOLEAN *) Context) = TRUE;\r
}\r
\r
\r
/**\r
  This function initialize(or configure) the Udp4Write instance.\r
\r
  @param  Udp4       Pointer to the EFI_UDP4_PROTOCOL instance.\r
  @param  StationIp  Pointer to the station ip address.\r
  @param  SubnetMask Pointer to the subnetmask of the station ip address.\r
  @param  Gateway    Pointer to the gateway ip address.\r
  @param  SrcPort    Pointer to the srouce port of the station.\r
\r
  @retval EFI_SUCCESS           The configuration settings were set, changed, or reset successfully.\r
  @retval EFI_NO_MAPPING        When using a default address, configuration (DHCP, BOOTP,\r
                                RARP, etc.) is not finished yet.\r
  @retval EFI_INVALID_PARAMETER One or more following conditions are TRUE:\r
  @retval EFI_ALREADY_STARTED   The EFI UDPv4 Protocol instance is already started/configured\r
                                and must be stopped/reset before it can be reconfigured.\r
  @retval EFI_ACCESS_DENIED     UdpConfigData. AllowDuplicatePort is FALSE\r
                                and UdpConfigData.StationPort is already used by\r
                                other instance.\r
  @retval EFI_OUT_OF_RESOURCES  The EFI UDPv4 Protocol driver cannot allocate memory for this\r
                                EFI UDPv4 Protocol instance.\r
  @retval EFI_DEVICE_ERROR      An unexpected network or system error occurred and this instance\r
                                was not opened.\r
  @retval Others                Please examine the function Udp4->Routes(Udp4, FALSE, &mZeroIp4Addr, &mZeroIp4Addr, Gateway) returns.\r
\r
**/\r
EFI_STATUS\r
PxeBcConfigureUdpWriteInstance (\r
  IN EFI_UDP4_PROTOCOL  *Udp4,\r
  IN EFI_IPv4_ADDRESS   *StationIp,\r
  IN EFI_IPv4_ADDRESS   *SubnetMask,\r
  IN EFI_IPv4_ADDRESS   *Gateway,\r
  IN OUT UINT16         *SrcPort\r
  )\r
{\r
  EFI_UDP4_CONFIG_DATA  Udp4CfgData;\r
  EFI_STATUS            Status;\r
\r
  ZeroMem (&Udp4CfgData, sizeof (Udp4CfgData));\r
\r
  Udp4CfgData.ReceiveTimeout = PXEBC_DEFAULT_LIFETIME;\r
  Udp4CfgData.TypeOfService  = DEFAULT_ToS;\r
  Udp4CfgData.TimeToLive     = DEFAULT_TTL;\r
  Udp4CfgData.AllowDuplicatePort = TRUE;\r
\r
  CopyMem (&Udp4CfgData.StationAddress, StationIp, sizeof (*StationIp));\r
  CopyMem (&Udp4CfgData.SubnetMask, SubnetMask, sizeof (*SubnetMask));\r
\r
  Udp4CfgData.StationPort    = *SrcPort;\r
\r
  //\r
  // Reset the instance.\r
  //\r
  Udp4->Configure (Udp4, NULL);\r
\r
  Status = Udp4->Configure (Udp4, &Udp4CfgData);\r
  if (!EFI_ERROR (Status) && (Gateway->Addr[0] != 0)) {\r
    //\r
    // basic configuration OK, need to add the default route entry\r
    //\r
    Status = Udp4->Routes (Udp4, FALSE, &mZeroIp4Addr, &mZeroIp4Addr, Gateway);\r
    if (EFI_ERROR (Status)) {\r
      //\r
      // roll back\r
      //\r
      Udp4->Configure (Udp4, NULL);\r
    }\r
  }\r
\r
  if (!EFI_ERROR (Status) && (*SrcPort == 0)) {\r
    Udp4->GetModeData (Udp4, &Udp4CfgData, NULL, NULL, NULL);\r
    *SrcPort = Udp4CfgData.StationPort;\r
  }\r
\r
  return Status;\r
}\r
\r
\r
/**\r
  Convert number to ASCII value.\r
\r
  @param  Number              Numeric value to convert to decimal ASCII value.\r
  @param  Buffer              Buffer to place ASCII version of the Number.\r
  @param  Length              Length of Buffer.\r
\r
**/\r
VOID\r
CvtNum (\r
  IN UINTN  Number,\r
  IN UINT8  *Buffer,\r
  IN UINTN   Length\r
  )\r
{\r
  UINTN Remainder;\r
\r
  while (Length > 0) {\r
    Remainder = Number % 10;\r
    Number /= 10;\r
    Length--;\r
    Buffer[Length] = (UINT8) ('0' + Remainder);\r
  }\r
}\r
\r
\r
/**\r
  Convert unsigned int number to decimal number.\r
\r
  @param  Number   The unsigned int number will be converted.\r
  @param  Buffer   Pointer to the buffer to store the decimal number after transform.\r
\r
  @return the length of the number after transform.\r
\r
**/\r
UINTN\r
UtoA10 (\r
  IN UINTN Number,\r
  IN CHAR8 *Buffer\r
  )\r
{\r
  UINTN Index;\r
  CHAR8 TempStr[64];\r
\r
  Index           = 63;\r
  TempStr[Index]  = 0;\r
\r
  do {\r
    Index--;\r
    TempStr[Index]  = (CHAR8) ('0' + (Number % 10));\r
    Number          = Number / 10;\r
  } while (Number != 0);\r
\r
  AsciiStrCpy (Buffer, &TempStr[Index]);\r
\r
  return AsciiStrLen (Buffer);\r
}\r
\r
\r
/**\r
  Convert ASCII numeric string to a UINTN value.\r
\r
  @param  Buffer  Pointer to the 8-byte unsigned int value.\r
\r
  @return UINTN value of the ASCII string.\r
\r
**/\r
UINT64\r
AtoU64 (\r
  IN UINT8 *Buffer\r
  )\r
{\r
  UINT64  Value;\r
  UINT8   Character;\r
\r
  Value = 0;\r
  while ((Character = *Buffer++) != '\0') {\r
    Value = MultU64x32 (Value, 10) + (Character - '0');\r
  }\r
\r
  return Value;\r
}\r
\r
Commit	Line	Data
dc361cc5	1	/** @file\r
f737cfb9	2	Support routines for PxeBc.\r
e2851998	3	\r
e5eed7d3 HT	4	Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>\r
e5eed7d3 HT	5	This program and the accompanying materials\r
dc361cc5	6	are licensed and made available under the terms and conditions of the BSD License\r
	7	which accompanies this distribution. The full text of the license may be found at\r
	8	http://opensource.org/licenses/bsd-license.php\r
	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
dc361cc5	13	**/\r
	14	\r
	15	\r
	16	#include "PxeBcImpl.h"\r
	17	\r
	18	\r
	19	/**\r
f737cfb9	20	This function returns SMBIOS string given the string number.\r
e2851998	21	\r
dc361cc5	22	@param Smbios Pointer to SMBIOS structure\r
	23	@param StringNumber String number to return. 0 is used to skip all\r
	24	strings and point to the next SMBIOS structure.\r
	25	\r
	26	@return Pointer to string, or pointer to next SMBIOS strcuture if StringNumber == 0\r
	27	\r
	28	**/\r
dc361cc5	29	CHAR8 *\r
	30	GetSmbiosString (\r
	31	IN SMBIOS_STRUCTURE_POINTER *Smbios,\r
	32	IN UINT16 StringNumber\r
	33	)\r
	34	{\r
	35	UINT16 Index;\r
	36	CHAR8 *String;\r
	37	\r
	38	//\r
	39	// Skip over formatted section\r
	40	//\r
	41	String = (CHAR8 *) (Smbios->Raw + Smbios->Hdr->Length);\r
	42	\r
	43	//\r
	44	// Look through unformated section\r
	45	//\r
	46	for (Index = 1; Index <= StringNumber \|\| StringNumber == 0; Index++) {\r
	47	if (StringNumber == Index) {\r
	48	return String;\r
	49	}\r
	50	//\r
	51	// Skip string\r
	52	//\r
	53	for (; *String != 0; String++)\r
	54	;\r
	55	String++;\r
	56	\r
	57	if (*String == 0) {\r
	58	//\r
	59	// If double NULL then we are done.\r
	60	// Return pointer to next structure in Smbios.\r
	61	// if you pass in a 0 you will always get here\r
	62	//\r
	63	Smbios->Raw = (UINT8 *)++String;\r
	64	return NULL;\r
	65	}\r
	66	}\r
	67	\r
	68	return NULL;\r
	69	}\r
	70	\r
	71	\r
	72	/**\r
f737cfb9	73	This function gets system guid and serial number from the smbios table.\r
dc361cc5	74	\r
f737cfb9	75	@param SystemGuid The pointer of returned system guid.\r
f737cfb9	76	@param SystemSerialNumber The pointer of returned system serial number.\r
dc361cc5	77	\r
dc361cc5	78	@retval EFI_SUCCESS Successfully get the system guid and system serial\r
f737cfb9	79	number.\r
f737cfb9	80	@retval EFI_NOT_FOUND Not find the SMBIOS table.\r
dc361cc5	81	\r
	82	**/\r
	83	EFI_STATUS\r
	84	GetSmbiosSystemGuidAndSerialNumber (\r
	85	IN EFI_GUID *SystemGuid,\r
	86	OUT CHAR8 **SystemSerialNumber\r
	87	)\r
	88	{\r
	89	EFI_STATUS Status;\r
	90	SMBIOS_TABLE_ENTRY_POINT *SmbiosTable;\r
	91	SMBIOS_STRUCTURE_POINTER Smbios;\r
	92	SMBIOS_STRUCTURE_POINTER SmbiosEnd;\r
	93	UINT16 Index;\r
	94	\r
	95	Status = EfiGetSystemConfigurationTable (&gEfiSmbiosTableGuid, (VOID **) &SmbiosTable);\r
	96	\r
	97	if (EFI_ERROR (Status)) {\r
	98	return EFI_NOT_FOUND;\r
	99	}\r
e2851998	100	ASSERT (SmbiosTable != NULL);\r
dc361cc5	101	\r
	102	Smbios.Hdr = (SMBIOS_STRUCTURE *) (UINTN) SmbiosTable->TableAddress;\r
	103	SmbiosEnd.Raw = (UINT8 *) (UINTN) (SmbiosTable->TableAddress + SmbiosTable->TableLength);\r
	104	\r
	105	for (Index = 0; Index < SmbiosTable->TableLength; Index++) {\r
	106	if (Smbios.Hdr->Type == 1) {\r
	107	if (Smbios.Hdr->Length < 0x19) {\r
	108	//\r
	109	// Older version did not support Guid and Serial number\r
	110	//\r
	111	continue;\r
	112	}\r
	113	//\r
	114	// SMBIOS tables are byte packed so we need to do a byte copy to\r
	115	// prevend alignment faults on Itanium-based platform.\r
	116	//\r
	117	CopyMem (SystemGuid, &Smbios.Type1->Uuid, sizeof (EFI_GUID));\r
	118	*SystemSerialNumber = GetSmbiosString (&Smbios, Smbios.Type1->SerialNumber);\r
	119	\r
	120	return EFI_SUCCESS;\r
	121	}\r
	122	//\r
	123	// Make Smbios point to the next record\r
	124	//\r
	125	GetSmbiosString (&Smbios, 0);\r
	126	\r
	127	if (Smbios.Raw >= SmbiosEnd.Raw) {\r
	128	//\r
	129	// SMBIOS 2.1 incorrectly stated the length of SmbiosTable as 0x1e.\r
	130	// given this we must double check against the length of the structure.\r
	131	//\r
	132	return EFI_SUCCESS;\r
	133	}\r
	134	}\r
	135	\r
	136	return EFI_SUCCESS;\r
	137	}\r
	138	\r
	139	\r
	140	/**\r
e2851998	141	The common notify function associated with various PxeBc events.\r
dc361cc5	142	\r
f737cfb9	143	@param Event The event signaled.\r
f737cfb9	144	@param Context The context.\r
dc361cc5	145	\r
dc361cc5	146	**/\r
dc361cc5	147	VOID\r
6d3ea23f	148	EFIAPI\r
dc361cc5	149	PxeBcCommonNotify (\r
	150	IN EFI_EVENT Event,\r
	151	IN VOID *Context\r
	152	)\r
	153	{\r
	154	((BOOLEAN ) Context) = TRUE;\r
	155	}\r
	156	\r
f737cfb9	157	\r
	158	/**\r
	159	This function initialize(or configure) the Udp4Write instance.\r
e2851998	160	\r
f737cfb9	161	@param Udp4 Pointer to the EFI_UDP4_PROTOCOL instance.\r
	162	@param StationIp Pointer to the station ip address.\r
	163	@param SubnetMask Pointer to the subnetmask of the station ip address.\r
	164	@param Gateway Pointer to the gateway ip address.\r
	165	@param SrcPort Pointer to the srouce port of the station.\r
e2851998	166	\r
f737cfb9	167	@retval EFI_SUCCESS The configuration settings were set, changed, or reset successfully.\r
	168	@retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP,\r
	169	RARP, etc.) is not finished yet.\r
	170	@retval EFI_INVALID_PARAMETER One or more following conditions are TRUE:\r
	171	@retval EFI_ALREADY_STARTED The EFI UDPv4 Protocol instance is already started/configured\r
	172	and must be stopped/reset before it can be reconfigured.\r
	173	@retval EFI_ACCESS_DENIED UdpConfigData. AllowDuplicatePort is FALSE\r
	174	and UdpConfigData.StationPort is already used by\r
	175	other instance.\r
	176	@retval EFI_OUT_OF_RESOURCES The EFI UDPv4 Protocol driver cannot allocate memory for this\r
	177	EFI UDPv4 Protocol instance.\r
	178	@retval EFI_DEVICE_ERROR An unexpected network or system error occurred and this instance\r
	179	was not opened.\r
	180	@retval Others Please examine the function Udp4->Routes(Udp4, FALSE, &mZeroIp4Addr, &mZeroIp4Addr, Gateway) returns.\r
e2851998	181	\r
f737cfb9	182	**/\r
8792362f	183	EFI_STATUS\r
	184	PxeBcConfigureUdpWriteInstance (\r
	185	IN EFI_UDP4_PROTOCOL *Udp4,\r
	186	IN EFI_IPv4_ADDRESS *StationIp,\r
	187	IN EFI_IPv4_ADDRESS *SubnetMask,\r
	188	IN EFI_IPv4_ADDRESS *Gateway,\r
	189	IN OUT UINT16 *SrcPort\r
	190	)\r
	191	{\r
	192	EFI_UDP4_CONFIG_DATA Udp4CfgData;\r
	193	EFI_STATUS Status;\r
	194	\r
	195	ZeroMem (&Udp4CfgData, sizeof (Udp4CfgData));\r
	196	\r
7bc01e86	197	Udp4CfgData.ReceiveTimeout = PXEBC_DEFAULT_LIFETIME;\r
8792362f	198	Udp4CfgData.TypeOfService = DEFAULT_ToS;\r
8792362f	199	Udp4CfgData.TimeToLive = DEFAULT_TTL;\r
319075ff	200	Udp4CfgData.AllowDuplicatePort = TRUE;\r
8792362f	201	\r
	202	CopyMem (&Udp4CfgData.StationAddress, StationIp, sizeof (*StationIp));\r
	203	CopyMem (&Udp4CfgData.SubnetMask, SubnetMask, sizeof (*SubnetMask));\r
	204	\r
	205	Udp4CfgData.StationPort = *SrcPort;\r
	206	\r
	207	//\r
	208	// Reset the instance.\r
	209	//\r
	210	Udp4->Configure (Udp4, NULL);\r
	211	\r
	212	Status = Udp4->Configure (Udp4, &Udp4CfgData);\r
	213	if (!EFI_ERROR (Status) && (Gateway->Addr[0] != 0)) {\r
	214	//\r
	215	// basic configuration OK, need to add the default route entry\r
	216	//\r
	217	Status = Udp4->Routes (Udp4, FALSE, &mZeroIp4Addr, &mZeroIp4Addr, Gateway);\r
	218	if (EFI_ERROR (Status)) {\r
	219	//\r
	220	// roll back\r
	221	//\r
	222	Udp4->Configure (Udp4, NULL);\r
	223	}\r
	224	}\r
	225	\r
	226	if (!EFI_ERROR (Status) && (*SrcPort == 0)) {\r
	227	Udp4->GetModeData (Udp4, &Udp4CfgData, NULL, NULL, NULL);\r
	228	*SrcPort = Udp4CfgData.StationPort;\r
	229	}\r
	230	\r
	231	return Status;\r
	232	}\r
	233	\r
dc361cc5	234	\r
dc361cc5	235	/**\r
f737cfb9	236	Convert number to ASCII value.\r
dc361cc5	237	\r
dc361cc5	238	@param Number Numeric value to convert to decimal ASCII value.\r
f737cfb9	239	@param Buffer Buffer to place ASCII version of the Number.\r
dc361cc5	240	@param Length Length of Buffer.\r
dc361cc5	241	\r
dc361cc5	242	**/\r
	243	VOID\r
	244	CvtNum (\r
	245	IN UINTN Number,\r
	246	IN UINT8 *Buffer,\r
f737cfb9	247	IN UINTN Length\r
dc361cc5	248	)\r
	249	{\r
	250	UINTN Remainder;\r
	251	\r
894d038a	252	while (Length > 0) {\r
dc361cc5	253	Remainder = Number % 10;\r
dc361cc5	254	Number /= 10;\r
894d038a	255	Length--;\r
dc361cc5	256	Buffer[Length] = (UINT8) ('0' + Remainder);\r
	257	}\r
	258	}\r
	259	\r
	260	\r
	261	/**\r
f737cfb9	262	Convert unsigned int number to decimal number.\r
dc361cc5	263	\r
f737cfb9	264	@param Number The unsigned int number will be converted.\r
f737cfb9	265	@param Buffer Pointer to the buffer to store the decimal number after transform.\r
dc361cc5	266	\r
f737cfb9	267	@return the length of the number after transform.\r
dc361cc5	268	\r
	269	**/\r
	270	UINTN\r
	271	UtoA10 (\r
	272	IN UINTN Number,\r
	273	IN CHAR8 *Buffer\r
	274	)\r
	275	{\r
	276	UINTN Index;\r
	277	CHAR8 TempStr[64];\r
	278	\r
	279	Index = 63;\r
	280	TempStr[Index] = 0;\r
	281	\r
	282	do {\r
	283	Index--;\r
	284	TempStr[Index] = (CHAR8) ('0' + (Number % 10));\r
	285	Number = Number / 10;\r
	286	} while (Number != 0);\r
	287	\r
	288	AsciiStrCpy (Buffer, &TempStr[Index]);\r
	289	\r
	290	return AsciiStrLen (Buffer);\r
	291	}\r
	292	\r
	293	\r
	294	/**\r
f737cfb9	295	Convert ASCII numeric string to a UINTN value.\r
dc361cc5	296	\r
f737cfb9	297	@param Buffer Pointer to the 8-byte unsigned int value.\r
dc361cc5	298	\r
f737cfb9	299	@return UINTN value of the ASCII string.\r
dc361cc5	300	\r
	301	**/\r
	302	UINT64\r
	303	AtoU64 (\r
	304	IN UINT8 *Buffer\r
	305	)\r
	306	{\r
	307	UINT64 Value;\r
	308	UINT8 Character;\r
	309	\r
	310	Value = 0;\r
	311	while ((Character = *Buffer++) != '\0') {\r
	312	Value = MultU64x32 (Value, 10) + (Character - '0');\r
	313	}\r
	314	\r
	315	return Value;\r
	316	}\r
	317	\r