UefiPayloadEntry.c File Reference

#include <Guid/MemoryTypeInformation.h>
#include "UefiPayloadEntry.h"

Go to the source code of this file.

Functions
EFI_STATUS	MemInfoCallbackMmio (IN MEMORY_MAP_ENTRY *MemoryMapEntry, IN VOID *Params)
EFI_STATUS	FindToludCallback (IN MEMORY_MAP_ENTRY *MemoryMapEntry, IN VOID *Params)
EFI_STATUS	MemInfoCallback (IN MEMORY_MAP_ENTRY *MemoryMapEntry, IN VOID *Params)
EFI_STATUS	BuildHobFromBl (VOID)
VOID	BuildGenericHob (VOID)
EFI_STATUS EFIAPI	_ModuleEntryPoint (IN UINTN BootloaderParameter)

Variables
STATIC UINT32	mTopOfLowerUsableDram = 0
EFI_MEMORY_TYPE_INFORMATION	mDefaultMemoryTypeInformation []

Detailed Description

Copyright (c) 2014 - 2021, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file UefiPayloadEntry.c.

Function Documentation

_ModuleEntryPoint()

EFI_STATUS EFIAPI _ModuleEntryPoint

(

IN UINTN

BootloaderParameter

)

Entry point to the C language phase of UEFI payload.

Parameters

[in]

BootloaderParameter

The starting address of bootloader parameter block.

Return values

It	will not return if SUCCESS, and return error when passing bootloader parameter.

Definition at line 396 of file UefiPayloadEntry.c.

BuildGenericHob()

VOID BuildGenericHob

(

VOID

)

This function will build some generic HOBs that doesn't depend on information from bootloaders.

Definition at line 350 of file UefiPayloadEntry.c.

BuildHobFromBl()

EFI_STATUS BuildHobFromBl

(

VOID

)

It will build HOBs based on information from bootloaders.

Return values

EFI_SUCCESS	If it completed successfully.
Others	If it failed to build required HOBs.

Definition at line 232 of file UefiPayloadEntry.c.

FindToludCallback()

EFI_STATUS FindToludCallback	(	IN MEMORY_MAP_ENTRY *	MemoryMapEntry,
		IN VOID *	Params
	)

Callback function to find TOLUD (Top of Lower Usable DRAM)

Estimate where TOLUD (Top of Lower Usable DRAM) resides. The exact position would require platform specific code.

Parameters

MemoryMapEntry	Memory map entry info got from bootloader.
Params	Not used for now.

Return values

EFI_SUCCESS

Successfully updated mTopOfLowerUsableDram.

Definition at line 115 of file UefiPayloadEntry.c.

MemInfoCallback()

EFI_STATUS MemInfoCallback	(	IN MEMORY_MAP_ENTRY *	MemoryMapEntry,
		IN VOID *	Params
	)

Callback function to build resource descriptor HOB

This function build a HOB based on the memory map entry info. Only add EFI_RESOURCE_SYSTEM_MEMORY.

Parameters

MemoryMapEntry	Memory map entry info got from bootloader.
Params	Not used for now.

Return values

RETURN_SUCCESS

Successfully build a HOB.

Definition at line 181 of file UefiPayloadEntry.c.

MemInfoCallbackMmio()

EFI_STATUS MemInfoCallbackMmio	(	IN MEMORY_MAP_ENTRY *	MemoryMapEntry,
		IN VOID *	Params
	)

Callback function to build resource descriptor HOB

This function build a HOB based on the memory map entry info. It creates only EFI_RESOURCE_MEMORY_MAPPED_IO and EFI_RESOURCE_MEMORY_RESERVED resources.

Parameters

MemoryMapEntry	Memory map entry info got from bootloader.
Params	A pointer to ACPI_BOARD_INFO.

Return values

EFI_SUCCESS	Successfully build a HOB.
EFI_INVALID_PARAMETER	Invalid parameter provided.

Definition at line 36 of file UefiPayloadEntry.c.

Variable Documentation

mDefaultMemoryTypeInformation

EFI_MEMORY_TYPE_INFORMATION mDefaultMemoryTypeInformation[]

Initial value:

= {
  { EfiACPIReclaimMemory,   FixedPcdGet32 (PcdMemoryTypeEfiACPIReclaimMemory)   },
  { EfiACPIMemoryNVS,       FixedPcdGet32 (PcdMemoryTypeEfiACPIMemoryNVS)       },
  { EfiReservedMemoryType,  FixedPcdGet32 (PcdMemoryTypeEfiReservedMemoryType)  },
  { EfiRuntimeServicesData, FixedPcdGet32 (PcdMemoryTypeEfiRuntimeServicesData) },
  { EfiRuntimeServicesCode, FixedPcdGet32 (PcdMemoryTypeEfiRuntimeServicesCode) },
  { EfiMaxMemoryType,       0                                                   }
}

Definition at line 13 of file UefiPayloadEntry.c.

mTopOfLowerUsableDram

STATIC UINT32 mTopOfLowerUsableDram = 0

Definition at line 11 of file UefiPayloadEntry.c.