X86EnablePaging64.c File Reference

#include "BaseLibInternals.h"

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Functions
VOID EFIAPI	AsmEnablePaging64 (IN UINT16 Cs, IN UINT64 EntryPoint, IN UINT64 Context1 OPTIONAL, IN UINT64 Context2 OPTIONAL, IN UINT64 NewStack)

Detailed Description

IA-32/x64 AsmEnablePaging64()

Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file X86EnablePaging64.c.

Function Documentation

AsmEnablePaging64()

VOID EFIAPI AsmEnablePaging64	(	IN UINT16	Cs,
		IN UINT64	EntryPoint,
		IN UINT64 Context1	OPTIONAL,
		IN UINT64 Context2	OPTIONAL,
		IN UINT64	NewStack
	)

Enables the 64-bit paging mode on the CPU.

Enables the 64-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables must be properly initialized prior to calling this service. This function assumes the current execution mode is 32-bit protected mode with flat descriptors. This function is only available on IA-32. After the 64-bit paging mode is enabled, control is transferred to the function specified by EntryPoint using the new stack specified by NewStack and passing in the parameters specified by Context1 and Context2. Context1 and Context2 are optional and may be 0. The function EntryPoint must never return.

If the current execution mode is not 32-bit protected mode with flat descriptors, then ASSERT(). If EntryPoint is 0, then ASSERT(). If NewStack is 0, then ASSERT().

Parameters

Cs	The 16-bit selector to load in the CS before EntryPoint is called. The descriptor in the GDT that this selector references must be setup for long mode.
EntryPoint	The 64-bit virtual address of the function to call with the new stack after paging is enabled.
Context1	The 64-bit virtual address of the context to pass into the EntryPoint function as the first parameter after paging is enabled.
Context2	The 64-bit virtual address of the context to pass into the EntryPoint function as the second parameter after paging is enabled.
NewStack	The 64-bit virtual address of the new stack to use for the EntryPoint function after paging is enabled.

Definition at line 45 of file X86EnablePaging64.c.