Provides services to create and parse HOBs. Only available for PEI\r
and DXE module types.\r
\r
-Copyright (c) 2006 - 2008, Intel Corporation\r
-All rights reserved. This program and the accompanying materials\r
+ The HOB Library supports the efficient creation and searching of HOBs\r
+ defined in the PI Specification.\r
+ A HOB is a Hand-Off Block, defined in the Framework architecture, that\r
+ allows the PEI phase to pass information to the DXE phase. HOBs are position\r
+ independent and can be relocated easily to different memory memory locations.\r
+\r
+Copyright (c) 2006 - 2016, 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
/**\r
Returns the pointer to the HOB list.\r
- ASSERT() if the HOB list returned by GetHobList() is NULL.\r
\r
This function returns the pointer to first HOB in the list.\r
- \r
+ For PEI phase, the PEI service GetHobList() can be used to retrieve the pointer\r
+ to the HOB list. For the DXE phase, the HOB list pointer can be retrieved through\r
+ the EFI System Table by looking up theHOB list GUID in the System Configuration Table.\r
+ Since the System Configuration Table does not exist that the time the DXE Core is\r
+ launched, the DXE Core uses a global variable from the DXE Core Entry Point Library\r
+ to manage the pointer to the HOB list.\r
+\r
+ If the pointer to the HOB list is NULL, then ASSERT().\r
+\r
@return The pointer to the HOB list.\r
\r
**/\r
/**\r
Returns the next instance of a HOB type from the starting HOB.\r
\r
- This function searches the first instance of a HOB type from the starting HOB pointer. \r
+ This function searches the first instance of a HOB type from the starting HOB pointer.\r
If there does not exist such HOB type from the starting HOB pointer, it will return NULL.\r
In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer\r
unconditionally: it returns HobStart back if HobStart itself meets the requirement;\r
caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart.\r
+\r
If HobStart is NULL, then ASSERT().\r
\r
@param Type The HOB type to return.\r
/**\r
Returns the first instance of a HOB type among the whole HOB list.\r
\r
- This function searches the first instance of a HOB type among the whole HOB list. \r
- If there does not exist such HOB type in the HOB list, it will return NULL. \r
+ This function searches the first instance of a HOB type among the whole HOB list.\r
+ If there does not exist such HOB type in the HOB list, it will return NULL.\r
+\r
+ If the pointer to the HOB list is NULL, then ASSERT().\r
\r
@param Type The HOB type to return.\r
\r
);\r
\r
/**\r
- This function searches the first instance of a HOB from the starting HOB pointer. \r
- Such HOB should satisfy two conditions: \r
- its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid. \r
- If there does not exist such HOB from the starting HOB pointer, it will return NULL. \r
+ Returns the next instance of the matched GUID HOB from the starting HOB.\r
+\r
+ This function searches the first instance of a HOB from the starting HOB pointer.\r
+ Such HOB should satisfy two conditions:\r
+ its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid.\r
+ If there does not exist such HOB from the starting HOB pointer, it will return NULL.\r
Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE ()\r
to extract the data section and its size info respectively.\r
In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer\r
unconditionally: it returns HobStart back if HobStart itself meets the requirement;\r
caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart.\r
+\r
If Guid is NULL, then ASSERT().\r
If HobStart is NULL, then ASSERT().\r
\r
);\r
\r
/**\r
- This function searches the first instance of a HOB among the whole HOB list. \r
+ Returns the first instance of the matched GUID HOB among the whole HOB list.\r
+\r
+ This function searches the first instance of a HOB among the whole HOB list.\r
Such HOB should satisfy two conditions:\r
its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid.\r
If there does not exist such HOB from the starting HOB pointer, it will return NULL.\r
Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE ()\r
to extract the data section and its size info respectively.\r
+\r
+ If the pointer to the HOB list is NULL, then ASSERT().\r
If Guid is NULL, then ASSERT().\r
\r
@param Guid The GUID to match with in the HOB list.\r
);\r
\r
/**\r
- Get the Boot Mode from the HOB list.\r
+ Get the system boot mode from the HOB list.\r
\r
- This function returns the system boot mode information from the \r
+ This function returns the system boot mode information from the\r
PHIT HOB in HOB list.\r
\r
+ If the pointer to the HOB list is NULL, then ASSERT().\r
+\r
@param VOID\r
\r
@return The Boot Mode.\r
This function builds a HOB for a loaded PE32 module.\r
It can only be invoked during PEI phase;\r
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+\r
If ModuleName is NULL, then ASSERT().\r
If there is no additional space for HOB creation, then ASSERT().\r
\r
IN EFI_PHYSICAL_ADDRESS EntryPoint\r
);\r
\r
+/**\r
+ Builds a HOB that describes a chunk of system memory with Owner GUID.\r
+\r
+ This function builds a HOB that describes a chunk of system memory.\r
+ It can only be invoked during PEI phase;\r
+ for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+ \r
+ If there is no additional space for HOB creation, then ASSERT().\r
+\r
+ @param ResourceType The type of resource described by this HOB.\r
+ @param ResourceAttribute The resource attributes of the memory described by this HOB.\r
+ @param PhysicalStart The 64 bit physical address of memory described by this HOB.\r
+ @param NumberOfBytes The length of the memory described by this HOB in bytes.\r
+ @param OwnerGUID GUID for the owner of this resource.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+BuildResourceDescriptorWithOwnerHob (\r
+ IN EFI_RESOURCE_TYPE ResourceType,\r
+ IN EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute,\r
+ IN EFI_PHYSICAL_ADDRESS PhysicalStart,\r
+ IN UINT64 NumberOfBytes,\r
+ IN EFI_GUID *OwnerGUID\r
+ );\r
+\r
/**\r
Builds a HOB that describes a chunk of system memory.\r
\r
This function builds a HOB that describes a chunk of system memory.\r
It can only be invoked during PEI phase;\r
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+\r
If there is no additional space for HOB creation, then ASSERT().\r
\r
@param ResourceType The type of resource described by this HOB.\r
);\r
\r
/**\r
- Builds a GUID HOB with a certain data length.\r
+ Builds a customized HOB tagged with a GUID for identification and returns\r
+ the start address of GUID HOB data.\r
\r
- This function builds a customized HOB tagged with a GUID for identification \r
- and returns the start address of GUID HOB data so that caller can fill the customized data. \r
+ This function builds a customized HOB tagged with a GUID for identification\r
+ and returns the start address of GUID HOB data so that caller can fill the customized data.\r
The HOB Header and Name field is already stripped.\r
It can only be invoked during PEI phase;\r
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+\r
If Guid is NULL, then ASSERT().\r
If there is no additional space for HOB creation, then ASSERT().\r
- If DataLength >= (0x10000 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().\r
+ If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().\r
+ HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8.\r
\r
@param Guid The GUID to tag the customized HOB.\r
@param DataLength The size of the data payload for the GUID HOB.\r
\r
- @return The start address of GUID HOB data.\r
+ @retval NULL The GUID HOB could not be allocated.\r
+ @retval others The start address of GUID HOB data.\r
\r
**/\r
VOID *\r
);\r
\r
/**\r
- Copies a data buffer to a newly-built HOB.\r
+ Builds a customized HOB tagged with a GUID for identification, copies the input data to the HOB\r
+ data field, and returns the start address of the GUID HOB data.\r
\r
- This function builds a customized HOB tagged with a GUID for identification,\r
- copies the input data to the HOB data field and returns the start address of the GUID HOB data.\r
+ This function builds a customized HOB tagged with a GUID for identification and copies the input\r
+ data to the HOB data field and returns the start address of the GUID HOB data. It can only be\r
+ invoked during PEI phase; for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
The HOB Header and Name field is already stripped.\r
It can only be invoked during PEI phase;\r
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+\r
If Guid is NULL, then ASSERT().\r
If Data is NULL and DataLength > 0, then ASSERT().\r
If there is no additional space for HOB creation, then ASSERT().\r
- If DataLength >= (0x10000 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().\r
+ If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().\r
+ HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8.\r
\r
@param Guid The GUID to tag the customized HOB.\r
@param Data The data to be copied into the data field of the GUID HOB.\r
@param DataLength The size of the data payload for the GUID HOB.\r
\r
- @return The start address of GUID HOB data.\r
+ @retval NULL The GUID HOB could not be allocated.\r
+ @retval others The start address of GUID HOB data.\r
\r
**/\r
VOID *\r
This function builds a Firmware Volume HOB.\r
It can only be invoked during PEI phase;\r
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+\r
If there is no additional space for HOB creation, then ASSERT().\r
+ If the FvImage buffer is not at its required alignment, then ASSERT().\r
\r
@param BaseAddress The base address of the Firmware Volume.\r
@param Length The size of the Firmware Volume in bytes.\r
This function builds a EFI_HOB_TYPE_FV2 HOB.\r
It can only be invoked during PEI phase;\r
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+\r
If there is no additional space for HOB creation, then ASSERT().\r
+ If the FvImage buffer is not at its required alignment, then ASSERT().\r
\r
@param BaseAddress The base address of the Firmware Volume.\r
@param Length The size of the Firmware Volume in bytes.\r
- @param FvName The name of the Firmware Volume.\r
+ @param FvName The name of the Firmware Volume.\r
@param FileName The name of the file.\r
- \r
+\r
**/\r
VOID\r
EFIAPI\r
This function builds a Capsule Volume HOB.\r
It can only be invoked during PEI phase;\r
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+\r
+ If the platform does not support Capsule Volume HOBs, then ASSERT().\r
If there is no additional space for HOB creation, then ASSERT().\r
\r
@param BaseAddress The base address of the Capsule Volume.\r
This function builds a HOB for the CPU.\r
It can only be invoked during PEI phase;\r
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+\r
If there is no additional space for HOB creation, then ASSERT().\r
\r
@param SizeOfMemorySpace The maximum physical memory addressability of the processor.\r
This function builds a HOB for the stack.\r
It can only be invoked during PEI phase;\r
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+\r
If there is no additional space for HOB creation, then ASSERT().\r
\r
@param BaseAddress The 64 bit physical address of the Stack.\r
This function builds a HOB for BSP store.\r
It can only be invoked during PEI phase;\r
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+\r
If there is no additional space for HOB creation, then ASSERT().\r
\r
@param BaseAddress The 64 bit physical address of the BSP.\r
This function builds a HOB for the memory allocation.\r
It can only be invoked during PEI phase;\r
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.\r
+\r
If there is no additional space for HOB creation, then ASSERT().\r
\r
@param BaseAddress The 64 bit physical address of the memory.\r
IN EFI_MEMORY_TYPE MemoryType\r
);\r
\r
-///\r
-/// Get a HOB's type from HOB header\r
-///\r
-#define GET_HOB_TYPE(Hob) ((Hob).Header->HobType)\r
-\r
-///\r
-/// Get a HOB's length from HOB header\r
-///\r
-#define GET_HOB_LENGTH(Hob) ((Hob).Header->HobLength)\r
-\r
-///\r
-/// Get the pointer to next HOB in HOB List\r
-///\r
-#define GET_NEXT_HOB(Hob) ((Hob).Raw + GET_HOB_LENGTH (Hob))\r
-\r
-///\r
-/// Judge if the HOB is the end of HOB List\r
-///\r
-#define END_OF_HOB_LIST(Hob) (GET_HOB_TYPE (Hob) == (UINT16)EFI_HOB_TYPE_END_OF_HOB_LIST)\r
-\r
-///\r
-/// Get the pointer to data field of GUID HOB \r
-///\r
-#define GET_GUID_HOB_DATA(GuidHob) ((VOID *) (((UINT8 *) &((GuidHob)->Name)) + sizeof (EFI_GUID)))\r
-\r
-///\r
-/// Get the data size of GUID HOB\r
-///\r
-#define GET_GUID_HOB_DATA_SIZE(GuidHob) (((GuidHob)->Header).HobLength - sizeof (EFI_HOB_GUID_TYPE))\r
+/**\r
+ Returns the type of a HOB.\r
+\r
+ This macro returns the HobType field from the HOB header for the\r
+ HOB specified by HobStart.\r
+\r
+ @param HobStart A pointer to a HOB.\r
+\r
+ @return HobType.\r
+\r
+**/\r
+#define GET_HOB_TYPE(HobStart) \\r
+ ((*(EFI_HOB_GENERIC_HEADER **)&(HobStart))->HobType)\r
+\r
+/**\r
+ Returns the length, in bytes, of a HOB.\r
+\r
+ This macro returns the HobLength field from the HOB header for the\r
+ HOB specified by HobStart.\r
+\r
+ @param HobStart A pointer to a HOB.\r
+\r
+ @return HobLength.\r
+\r
+**/\r
+#define GET_HOB_LENGTH(HobStart) \\r
+ ((*(EFI_HOB_GENERIC_HEADER **)&(HobStart))->HobLength)\r
+\r
+/**\r
+ Returns a pointer to the next HOB in the HOB list.\r
+\r
+ This macro returns a pointer to HOB that follows the\r
+ HOB specified by HobStart in the HOB List.\r
+\r
+ @param HobStart A pointer to a HOB.\r
+\r
+ @return A pointer to the next HOB in the HOB list.\r
+\r
+**/\r
+#define GET_NEXT_HOB(HobStart) \\r
+ (VOID *)(*(UINT8 **)&(HobStart) + GET_HOB_LENGTH (HobStart))\r
+\r
+/**\r
+ Determines if a HOB is the last HOB in the HOB list.\r
+\r
+ This macro determine if the HOB specified by HobStart is the\r
+ last HOB in the HOB list. If HobStart is last HOB in the HOB list,\r
+ then TRUE is returned. Otherwise, FALSE is returned.\r
+\r
+ @param HobStart A pointer to a HOB.\r
+\r
+ @retval TRUE The HOB specified by HobStart is the last HOB in the HOB list.\r
+ @retval FALSE The HOB specified by HobStart is not the last HOB in the HOB list.\r
+\r
+**/\r
+#define END_OF_HOB_LIST(HobStart) (GET_HOB_TYPE (HobStart) == (UINT16)EFI_HOB_TYPE_END_OF_HOB_LIST)\r
+\r
+/**\r
+ Returns a pointer to data buffer from a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.\r
+\r
+ This macro returns a pointer to the data buffer in a HOB specified by HobStart.\r
+ HobStart is assumed to be a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.\r
+\r
+ @param GuidHob A pointer to a HOB.\r
+\r
+ @return A pointer to the data buffer in a HOB.\r
+\r
+**/\r
+#define GET_GUID_HOB_DATA(HobStart) \\r
+ (VOID *)(*(UINT8 **)&(HobStart) + sizeof (EFI_HOB_GUID_TYPE))\r
+\r
+/**\r
+ Returns the size of the data buffer from a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.\r
+\r
+ This macro returns the size, in bytes, of the data buffer in a HOB specified by HobStart.\r
+ HobStart is assumed to be a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.\r
+\r
+ @param GuidHob A pointer to a HOB.\r
+\r
+ @return The size of the data buffer.\r
+**/\r
+#define GET_GUID_HOB_DATA_SIZE(HobStart) \\r
+ (UINT16)(GET_HOB_LENGTH (HobStart) - sizeof (EFI_HOB_GUID_TYPE))\r
\r
#endif\r
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