/** @file\r
HOB Library implementation for DxeCore driver.\r
\r
- Copyright (c) 2006 - 2008, Intel Corporation<BR>\r
- All rights reserved. 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
+Copyright (c) 2006 - 2008, Intel Corporation<BR>\r
+All rights reserved. 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
+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
-\r
#include <PiDxe.h>\r
\r
#include <Library/HobLib.h>\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
\r
return HandOffHob->BootMode;\r
}\r
+\r
/**\r
Builds a HOB for a loaded PE32 module.\r
\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
@param ModuleName The GUID File Name of the module.\r
@param MemoryAllocationModule The 64 bit physical address of the module.\r
@param ModuleLength The length of the module in bytes.\r
- @param EntryPoint The 64 bit physical address of the module's entry point.\r
+ @param EntryPoint The 64 bit physical address of the module entry point.\r
\r
**/\r
VOID\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
}\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
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
\r
@param BaseAddress The base address of the Firmware Volume.\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
\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
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 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
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