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148 lines
6.1 KiB
C
148 lines
6.1 KiB
C
/** @file
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Non-existing BaseLib functions on x64
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Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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/**
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Enables the 32-bit paging mode on the CPU.
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Enables the 32-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables
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must be properly initialized prior to calling this service. This function
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assumes the current execution mode is 32-bit protected mode. This function is
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only available on IA-32. After the 32-bit paging mode is enabled, control is
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transferred to the function specified by EntryPoint using the new stack
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specified by NewStack and passing in the parameters specified by Context1 and
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Context2. Context1 and Context2 are optional and may be NULL. The function
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EntryPoint must never return.
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There are a number of constraints that must be followed before calling this
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function:
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1) Interrupts must be disabled.
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2) The caller must be in 32-bit protected mode with flat descriptors. This
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means all descriptors must have a base of 0 and a limit of 4GB.
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3) CR0 and CR4 must be compatible with 32-bit protected mode with flat
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descriptors.
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4) CR3 must point to valid page tables that will be used once the transition
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is complete, and those page tables must guarantee that the pages for this
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function and the stack are identity mapped.
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@param EntryPoint A pointer to function to call with the new stack after
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paging is enabled.
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@param Context1 A pointer to the context to pass into the EntryPoint
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function as the first parameter after paging is enabled.
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@param Context2 A pointer to the context to pass into the EntryPoint
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function as the second parameter after paging is enabled.
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@param NewStack A pointer to the new stack to use for the EntryPoint
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function after paging is enabled.
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**/
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VOID
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EFIAPI
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InternalX86EnablePaging32 (
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IN SWITCH_STACK_ENTRY_POINT EntryPoint,
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IN VOID *Context1, OPTIONAL
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IN VOID *Context2, OPTIONAL
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IN VOID *NewStack
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)
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{
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//
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// This function cannot work on x64 platform
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//
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ASSERT (FALSE);
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}
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/**
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Disables the 32-bit paging mode on the CPU.
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Disables the 32-bit paging mode on the CPU and returns to 32-bit protected
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mode. This function assumes the current execution mode is 32-paged protected
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mode. This function is only available on IA-32. After the 32-bit paging mode
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is disabled, control is transferred to the function specified by EntryPoint
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using the new stack specified by NewStack and passing in the parameters
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specified by Context1 and Context2. Context1 and Context2 are optional and
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may be NULL. The function EntryPoint must never return.
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There are a number of constraints that must be followed before calling this
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function:
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1) Interrupts must be disabled.
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2) The caller must be in 32-bit paged mode.
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3) CR0, CR3, and CR4 must be compatible with 32-bit paged mode.
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4) CR3 must point to valid page tables that guarantee that the pages for
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this function and the stack are identity mapped.
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@param EntryPoint A pointer to function to call with the new stack after
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paging is disabled.
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@param Context1 A pointer to the context to pass into the EntryPoint
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function as the first parameter after paging is disabled.
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@param Context2 A pointer to the context to pass into the EntryPoint
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function as the second parameter after paging is
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disabled.
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@param NewStack A pointer to the new stack to use for the EntryPoint
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function after paging is disabled.
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**/
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VOID
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EFIAPI
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InternalX86DisablePaging32 (
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IN SWITCH_STACK_ENTRY_POINT EntryPoint,
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IN VOID *Context1, OPTIONAL
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IN VOID *Context2, OPTIONAL
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IN VOID *NewStack
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)
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{
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//
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// This function cannot work on x64 platform
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//
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ASSERT (FALSE);
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}
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/**
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Enables the 64-bit paging mode on the CPU.
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Enables the 64-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables
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must be properly initialized prior to calling this service. This function
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assumes the current execution mode is 32-bit protected mode with flat
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descriptors. This function is only available on IA-32. After the 64-bit
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paging mode is enabled, control is transferred to the function specified by
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EntryPoint using the new stack specified by NewStack and passing in the
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parameters specified by Context1 and Context2. Context1 and Context2 are
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optional and may be 0. The function EntryPoint must never return.
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@param Cs The 16-bit selector to load in the CS before EntryPoint
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is called. The descriptor in the GDT that this selector
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references must be setup for long mode.
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@param EntryPoint The 64-bit virtual address of the function to call with
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the new stack after paging is enabled.
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@param Context1 The 64-bit virtual address of the context to pass into
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the EntryPoint function as the first parameter after
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paging is enabled.
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@param Context2 The 64-bit virtual address of the context to pass into
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the EntryPoint function as the second parameter after
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paging is enabled.
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@param NewStack The 64-bit virtual address of the new stack to use for
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the EntryPoint function after paging is enabled.
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**/
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VOID
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EFIAPI
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InternalX86EnablePaging64 (
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IN UINT16 Cs,
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IN UINT64 EntryPoint,
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IN UINT64 Context1, OPTIONAL
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IN UINT64 Context2, OPTIONAL
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IN UINT64 NewStack
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)
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{
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//
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// This function cannot work on x64 platform.
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//
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ASSERT (FALSE);
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}
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