Import some basic libraries instances for Mde Packages.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2704 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
vanjeff
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MdePkg/Library/BaseLib/BaseLibInternals.h
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872
MdePkg/Library/BaseLib/BaseLibInternals.h
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/** @file
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Declaration of internal functions in BaseLib.
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Copyright (c) 2006 - 2007, Intel Corporation<BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name: BaseLibInternals.h
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**/
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#ifndef __BASE_LIB_INTERNALS__
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#define __BASE_LIB_INTERNALS__
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//
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// Include common header file for this module.
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//
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#include "CommonHeader.h"
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#define QUIENT_MAX_UINTN_DIVIDED_BY_10 ((UINTN) -1 / 10)
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#define REMINDER_MAX_UINTN_DIVIDED_BY_10 ((UINTN) -1 % 10)
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#define QUIENT_MAX_UINTN_DIVIDED_BY_16 ((UINTN) -1 / 16)
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#define REMINDER_MAX_UINTN_DIVIDED_BY_16 ((UINTN) -1 % 16)
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#define QUIENT_MAX_UINT64_DIVIDED_BY_10 ((UINT64) -1 / 10)
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#define REMINDER_MAX_UINT64_DIVIDED_BY_10 ((UINT64) -1 % 10)
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#define QUIENT_MAX_UINT64_DIVIDED_BY_16 ((UINT64) -1 / 16)
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#define REMINDER_MAX_UINT64_DIVIDED_BY_16 ((UINT64) -1 % 16)
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//
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// Math functions
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//
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/**
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Shifts a 64-bit integer left between 0 and 63 bits. The low bits
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are filled with zeros. The shifted value is returned.
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This function shifts the 64-bit value Operand to the left by Count bits. The
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low Count bits are set to zero. The shifted value is returned.
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@param Operand The 64-bit operand to shift left.
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@param Count The number of bits to shift left.
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@return Operand << Count
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**/
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UINT64
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EFIAPI
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InternalMathLShiftU64 (
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IN UINT64 Operand,
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IN UINTN Count
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);
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/**
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Shifts a 64-bit integer right between 0 and 63 bits. This high bits
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are filled with zeros. The shifted value is returned.
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This function shifts the 64-bit value Operand to the right by Count bits. The
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high Count bits are set to zero. The shifted value is returned.
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@param Operand The 64-bit operand to shift right.
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@param Count The number of bits to shift right.
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@return Operand >> Count
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**/
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UINT64
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EFIAPI
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InternalMathRShiftU64 (
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IN UINT64 Operand,
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IN UINTN Count
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);
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/**
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Shifts a 64-bit integer right between 0 and 63 bits. The high bits
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are filled with original integer's bit 63. The shifted value is returned.
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This function shifts the 64-bit value Operand to the right by Count bits. The
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high Count bits are set to bit 63 of Operand. The shifted value is returned.
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@param Operand The 64-bit operand to shift right.
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@param Count The number of bits to shift right.
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@return Operand arithmetically shifted right by Count
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**/
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UINT64
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EFIAPI
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InternalMathARShiftU64 (
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IN UINT64 Operand,
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IN UINTN Count
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);
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/**
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Rotates a 64-bit integer left between 0 and 63 bits, filling
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the low bits with the high bits that were rotated.
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This function rotates the 64-bit value Operand to the left by Count bits. The
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low Count bits are fill with the high Count bits of Operand. The rotated
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value is returned.
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@param Operand The 64-bit operand to rotate left.
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@param Count The number of bits to rotate left.
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@return Operand <<< Count
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**/
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UINT64
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EFIAPI
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InternalMathLRotU64 (
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IN UINT64 Operand,
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IN UINTN Count
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);
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/**
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Rotates a 64-bit integer right between 0 and 63 bits, filling
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the high bits with the high low bits that were rotated.
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This function rotates the 64-bit value Operand to the right by Count bits.
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The high Count bits are fill with the low Count bits of Operand. The rotated
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value is returned.
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@param Operand The 64-bit operand to rotate right.
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@param Count The number of bits to rotate right.
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@return Operand >>> Count
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**/
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UINT64
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EFIAPI
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InternalMathRRotU64 (
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IN UINT64 Operand,
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IN UINTN Count
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);
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/**
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Switches the endianess of a 64-bit integer.
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This function swaps the bytes in a 64-bit unsigned value to switch the value
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from little endian to big endian or vice versa. The byte swapped value is
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returned.
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@param Operand A 64-bit unsigned value.
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@return The byte swaped Operand.
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**/
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UINT64
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EFIAPI
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InternalMathSwapBytes64 (
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IN UINT64 Operand
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);
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/**
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Multiples a 64-bit unsigned integer by a 32-bit unsigned integer
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and generates a 64-bit unsigned result.
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This function multiples the 64-bit unsigned value Multiplicand by the 32-bit
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unsigned value Multiplier and generates a 64-bit unsigned result. This 64-
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bit unsigned result is returned.
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@param Multiplicand A 64-bit unsigned value.
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@param Multiplier A 32-bit unsigned value.
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@return Multiplicand * Multiplier
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**/
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UINT64
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EFIAPI
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InternalMathMultU64x32 (
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IN UINT64 Multiplicand,
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IN UINT32 Multiplier
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);
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/**
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Multiples a 64-bit unsigned integer by a 64-bit unsigned integer
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and generates a 64-bit unsigned result.
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This function multiples the 64-bit unsigned value Multiplicand by the 64-bit
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unsigned value Multiplier and generates a 64-bit unsigned result. This 64-
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bit unsigned result is returned.
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@param Multiplicand A 64-bit unsigned value.
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@param Multiplier A 64-bit unsigned value.
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@return Multiplicand * Multiplier
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**/
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UINT64
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EFIAPI
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InternalMathMultU64x64 (
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IN UINT64 Multiplicand,
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IN UINT64 Multiplier
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);
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/**
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Divides a 64-bit unsigned integer by a 32-bit unsigned integer and
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generates a 64-bit unsigned result.
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This function divides the 64-bit unsigned value Dividend by the 32-bit
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unsigned value Divisor and generates a 64-bit unsigned quotient. This
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function returns the 64-bit unsigned quotient.
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@param Dividend A 64-bit unsigned value.
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@param Divisor A 32-bit unsigned value.
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@return Dividend / Divisor
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**/
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UINT64
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EFIAPI
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InternalMathDivU64x32 (
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IN UINT64 Dividend,
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IN UINT32 Divisor
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);
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/**
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Divides a 64-bit unsigned integer by a 32-bit unsigned integer and
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generates a 32-bit unsigned remainder.
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This function divides the 64-bit unsigned value Dividend by the 32-bit
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unsigned value Divisor and generates a 32-bit remainder. This function
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returns the 32-bit unsigned remainder.
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@param Dividend A 64-bit unsigned value.
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@param Divisor A 32-bit unsigned value.
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@return Dividend % Divisor
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**/
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UINT32
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EFIAPI
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InternalMathModU64x32 (
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IN UINT64 Dividend,
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IN UINT32 Divisor
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);
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/**
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Divides a 64-bit unsigned integer by a 32-bit unsigned integer and
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generates a 64-bit unsigned result and an optional 32-bit unsigned remainder.
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This function divides the 64-bit unsigned value Dividend by the 32-bit
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unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder
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is not NULL, then the 32-bit unsigned remainder is returned in Remainder.
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This function returns the 64-bit unsigned quotient.
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@param Dividend A 64-bit unsigned value.
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@param Divisor A 32-bit unsigned value.
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@param Remainder A pointer to a 32-bit unsigned value. This parameter is
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optional and may be NULL.
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@return Dividend / Divisor
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**/
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UINT64
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EFIAPI
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InternalMathDivRemU64x32 (
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IN UINT64 Dividend,
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IN UINT32 Divisor,
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OUT UINT32 *Remainder
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);
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/**
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Divides a 64-bit unsigned integer by a 64-bit unsigned integer and
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generates a 64-bit unsigned result and an optional 64-bit unsigned remainder.
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This function divides the 64-bit unsigned value Dividend by the 64-bit
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unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder
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is not NULL, then the 64-bit unsigned remainder is returned in Remainder.
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This function returns the 64-bit unsigned quotient.
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@param Dividend A 64-bit unsigned value.
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@param Divisor A 64-bit unsigned value.
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@param Remainder A pointer to a 64-bit unsigned value. This parameter is
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optional and may be NULL.
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@return Dividend / Divisor
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**/
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UINT64
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EFIAPI
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InternalMathDivRemU64x64 (
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IN UINT64 Dividend,
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IN UINT64 Divisor,
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OUT UINT64 *Remainder
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);
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/**
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Divides a 64-bit signed integer by a 64-bit signed integer and
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generates a 64-bit signed result and a optional 64-bit signed remainder.
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This function divides the 64-bit unsigned value Dividend by the 64-bit
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unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder
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is not NULL, then the 64-bit unsigned remainder is returned in Remainder.
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This function returns the 64-bit unsigned quotient.
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@param Dividend A 64-bit signed value.
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@param Divisor A 64-bit signed value.
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@param Remainder A pointer to a 64-bit signed value. This parameter is
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optional and may be NULL.
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@return Dividend / Divisor
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**/
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INT64
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InternalMathDivRemS64x64 (
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IN INT64 Dividend,
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IN INT64 Divisor,
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OUT INT64 *Remainder OPTIONAL
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);
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/**
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Transfers control to a function starting with a new stack.
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Transfers control to the function specified by EntryPoint using the
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new stack specified by NewStack and passing in the parameters specified
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by Context1 and Context2. Context1 and Context2 are optional and may
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be NULL. The function EntryPoint must never return.
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Marker will be ignored on IA-32, x64, and EBC.
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IPF CPUs expect one additional parameter of type VOID * that specifies
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the new backing store pointer.
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If EntryPoint is NULL, then ASSERT().
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If NewStack is NULL, then ASSERT().
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@param EntryPoint A pointer to function to call with the new stack.
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@param Context1 A pointer to the context to pass into the EntryPoint
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function.
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@param Context2 A pointer to the context to pass into the EntryPoint
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function.
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@param NewStack A pointer to the new stack to use for the EntryPoint
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function.
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@param Marker VA_LIST marker for the variable argument list.
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**/
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VOID
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EFIAPI
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InternalSwitchStack (
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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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IN VA_LIST Marker
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);
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/**
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Worker function that locates the Node in the List
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By searching the List, finds the location of the Node in List. At the same time,
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verifies the validity of this list.
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If List is NULL, then ASSERT().
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If List->ForwardLink is NULL, then ASSERT().
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If List->backLink is NULL, then ASSERT().
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If Node is NULL, then ASSERT();
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If PcdMaximumLinkedListLenth is not zero, and prior to insertion the number
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of nodes in ListHead, including the ListHead node, is greater than or
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equal to PcdMaximumLinkedListLength, then ASSERT().
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@param List A pointer to a node in a linked list.
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@param Node A pointer to one nod.
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@retval TRUE Node is in List
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@retval FALSE Node isn't in List, or List is invalid
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**/
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BOOLEAN
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IsNodeInList (
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IN CONST LIST_ENTRY *List,
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IN CONST LIST_ENTRY *Node
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);
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||||
|
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/**
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||||
Performs an atomic increment of an 32-bit unsigned integer.
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Performs an atomic increment of the 32-bit unsigned integer specified by
|
||||
Value and returns the incremented value. The increment operation must be
|
||||
performed using MP safe mechanisms. The state of the return value is not
|
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guaranteed to be MP safe.
|
||||
|
||||
@param Value A pointer to the 32-bit value to increment.
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||||
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@return The incremented value.
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**/
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UINT32
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EFIAPI
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InternalSyncIncrement (
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IN volatile UINT32 *Value
|
||||
);
|
||||
|
||||
|
||||
/**
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||||
Performs an atomic decrement of an 32-bit unsigned integer.
|
||||
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||||
Performs an atomic decrement of the 32-bit unsigned integer specified by
|
||||
Value and returns the decrement value. The decrement operation must be
|
||||
performed using MP safe mechanisms. The state of the return value is not
|
||||
guaranteed to be MP safe.
|
||||
|
||||
@param Value A pointer to the 32-bit value to decrement.
|
||||
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||||
@return The decrement value.
|
||||
|
||||
**/
|
||||
UINT32
|
||||
EFIAPI
|
||||
InternalSyncDecrement (
|
||||
IN volatile UINT32 *Value
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Performs an atomic compare exchange operation on a 32-bit unsigned integer.
|
||||
|
||||
Performs an atomic compare exchange operation on the 32-bit unsigned integer
|
||||
specified by Value. If Value is equal to CompareValue, then Value is set to
|
||||
ExchangeValue and CompareValue is returned. If Value is not equal to CompareValue,
|
||||
then Value is returned. The compare exchange operation must be performed using
|
||||
MP safe mechanisms.
|
||||
|
||||
@param Value A pointer to the 32-bit value for the compare exchange
|
||||
operation.
|
||||
@param CompareValue 32-bit value used in compare operation.
|
||||
@param ExchangeValue 32-bit value used in exchange operation.
|
||||
|
||||
@return The original *Value before exchange.
|
||||
|
||||
**/
|
||||
UINT32
|
||||
EFIAPI
|
||||
InternalSyncCompareExchange32 (
|
||||
IN volatile UINT32 *Value,
|
||||
IN UINT32 CompareValue,
|
||||
IN UINT32 ExchangeValue
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Performs an atomic compare exchange operation on a 64-bit unsigned integer.
|
||||
|
||||
Performs an atomic compare exchange operation on the 64-bit unsigned integer specified
|
||||
by Value. If Value is equal to CompareValue, then Value is set to ExchangeValue and
|
||||
CompareValue is returned. If Value is not equal to CompareValue, then Value is returned.
|
||||
The compare exchange operation must be performed using MP safe mechanisms.
|
||||
|
||||
@param Value A pointer to the 64-bit value for the compare exchange
|
||||
operation.
|
||||
@param CompareValue 64-bit value used in compare operation.
|
||||
@param ExchangeValue 64-bit value used in exchange operation.
|
||||
|
||||
@return The original *Value before exchange.
|
||||
|
||||
**/
|
||||
UINT64
|
||||
EFIAPI
|
||||
InternalSyncCompareExchange64 (
|
||||
IN volatile UINT64 *Value,
|
||||
IN UINT64 CompareValue,
|
||||
IN UINT64 ExchangeValue
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Worker function that returns a bit field from Operand
|
||||
|
||||
Returns the bitfield specified by the StartBit and the EndBit from Operand.
|
||||
|
||||
@param Operand Operand on which to perform the bitfield operation.
|
||||
@param StartBit The ordinal of the least significant bit in the bit field.
|
||||
@param EndBit The ordinal of the most significant bit in the bit field.
|
||||
|
||||
@return The bit field read.
|
||||
|
||||
**/
|
||||
unsigned int
|
||||
BitFieldReadUint (
|
||||
IN unsigned int Operand,
|
||||
IN UINTN StartBit,
|
||||
IN UINTN EndBit
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Worker function that reads a bit field from Operand, performs a bitwise OR,
|
||||
and returns the result.
|
||||
|
||||
Performs a bitwise OR between the bit field specified by StartBit and EndBit
|
||||
in Operand and the value specified by AndData. All other bits in Operand are
|
||||
preserved. The new value is returned.
|
||||
|
||||
@param Operand Operand on which to perform the bitfield operation.
|
||||
@param StartBit The ordinal of the least significant bit in the bit field.
|
||||
@param EndBit The ordinal of the most significant bit in the bit field.
|
||||
@param OrData The value to OR with the read value from the value
|
||||
|
||||
@return The new value.
|
||||
|
||||
**/
|
||||
unsigned int
|
||||
BitFieldOrUint (
|
||||
IN unsigned int Operand,
|
||||
IN UINTN StartBit,
|
||||
IN UINTN EndBit,
|
||||
IN unsigned int OrData
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Worker function that reads a bit field from Operand, performs a bitwise AND,
|
||||
and returns the result.
|
||||
|
||||
Performs a bitwise AND between the bit field specified by StartBit and EndBit
|
||||
in Operand and the value specified by AndData. All other bits in Operand are
|
||||
preserved. The new value is returned.
|
||||
|
||||
@param Operand Operand on which to perform the bitfield operation.
|
||||
@param StartBit The ordinal of the least significant bit in the bit field.
|
||||
@param EndBit The ordinal of the most significant bit in the bit field.
|
||||
@param AndData The value to And with the read value from the value
|
||||
|
||||
@return The new value.
|
||||
|
||||
**/
|
||||
unsigned int
|
||||
BitFieldAndUint (
|
||||
IN unsigned int Operand,
|
||||
IN UINTN StartBit,
|
||||
IN UINTN EndBit,
|
||||
IN unsigned int AndData
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Worker function that checks ASSERT condition for JumpBuffer
|
||||
|
||||
Checks ASSERT condition for JumpBuffer.
|
||||
|
||||
If JumpBuffer is NULL, then ASSERT().
|
||||
For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().
|
||||
|
||||
@param JumpBuffer A pointer to CPU context buffer.
|
||||
|
||||
**/
|
||||
VOID
|
||||
InternalAssertJumpBuffer (
|
||||
IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer
|
||||
);
|
||||
|
||||
|
||||
/**
|
||||
Restores the CPU context that was saved with SetJump().
|
||||
|
||||
Restores the CPU context from the buffer specified by JumpBuffer.
|
||||
This function never returns to the caller.
|
||||
Instead is resumes execution based on the state of JumpBuffer.
|
||||
|
||||
@param JumpBuffer A pointer to CPU context buffer.
|
||||
@param Value The value to return when the SetJump() context is restored.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InternalLongJump (
|
||||
IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer,
|
||||
IN UINTN Value
|
||||
);
|
||||
|
||||
|
||||
//
|
||||
// Ia32 and x64 specific functions
|
||||
//
|
||||
#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64)
|
||||
|
||||
/**
|
||||
Reads the current Global Descriptor Table Register(GDTR) descriptor.
|
||||
|
||||
Reads and returns the current GDTR descriptor and returns it in Gdtr. This
|
||||
function is only available on IA-32 and X64.
|
||||
|
||||
@param Gdtr Pointer to a GDTR descriptor.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InternalX86ReadGdtr (
|
||||
OUT IA32_DESCRIPTOR *Gdtr
|
||||
);
|
||||
|
||||
/**
|
||||
Writes the current Global Descriptor Table Register (GDTR) descriptor.
|
||||
|
||||
Writes and the current GDTR descriptor specified by Gdtr. This function is
|
||||
only available on IA-32 and X64.
|
||||
|
||||
@param Gdtr Pointer to a GDTR descriptor.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InternalX86WriteGdtr (
|
||||
IN CONST IA32_DESCRIPTOR *Gdtr
|
||||
);
|
||||
|
||||
/**
|
||||
Reads the current Interrupt Descriptor Table Register(GDTR) descriptor.
|
||||
|
||||
Reads and returns the current IDTR descriptor and returns it in Idtr. This
|
||||
function is only available on IA-32 and X64.
|
||||
|
||||
@param Idtr Pointer to a IDTR descriptor.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InternalX86ReadIdtr (
|
||||
OUT IA32_DESCRIPTOR *Idtr
|
||||
);
|
||||
|
||||
/**
|
||||
Writes the current Interrupt Descriptor Table Register(GDTR) descriptor.
|
||||
|
||||
Writes the current IDTR descriptor and returns it in Idtr. This function is
|
||||
only available on IA-32 and X64.
|
||||
|
||||
@param Idtr Pointer to a IDTR descriptor.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InternalX86WriteIdtr (
|
||||
IN CONST IA32_DESCRIPTOR *Idtr
|
||||
);
|
||||
|
||||
/**
|
||||
Save the current floating point/SSE/SSE2 context to a buffer.
|
||||
|
||||
Saves the current floating point/SSE/SSE2 state to the buffer specified by
|
||||
Buffer. Buffer must be aligned on a 16-byte boundary. This function is only
|
||||
available on IA-32 and X64.
|
||||
|
||||
@param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InternalX86FxSave (
|
||||
OUT IA32_FX_BUFFER *Buffer
|
||||
);
|
||||
|
||||
/**
|
||||
Restores the current floating point/SSE/SSE2 context from a buffer.
|
||||
|
||||
Restores the current floating point/SSE/SSE2 state from the buffer specified
|
||||
by Buffer. Buffer must be aligned on a 16-byte boundary. This function is
|
||||
only available on IA-32 and X64.
|
||||
|
||||
@param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InternalX86FxRestore (
|
||||
IN CONST IA32_FX_BUFFER *Buffer
|
||||
);
|
||||
|
||||
/**
|
||||
Enables the 32-bit paging mode on the CPU.
|
||||
|
||||
Enables the 32-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. This function is
|
||||
only available on IA-32. After the 32-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 NULL. The function
|
||||
EntryPoint must never return.
|
||||
|
||||
There are a number of constraints that must be followed before calling this
|
||||
function:
|
||||
1) Interrupts must be disabled.
|
||||
2) The caller must be in 32-bit protected mode with flat descriptors. This
|
||||
means all descriptors must have a base of 0 and a limit of 4GB.
|
||||
3) CR0 and CR4 must be compatible with 32-bit protected mode with flat
|
||||
descriptors.
|
||||
4) CR3 must point to valid page tables that will be used once the transition
|
||||
is complete, and those page tables must guarantee that the pages for this
|
||||
function and the stack are identity mapped.
|
||||
|
||||
@param EntryPoint A pointer to function to call with the new stack after
|
||||
paging is enabled.
|
||||
@param Context1 A pointer to the context to pass into the EntryPoint
|
||||
function as the first parameter after paging is enabled.
|
||||
@param Context2 A pointer to the context to pass into the EntryPoint
|
||||
function as the second parameter after paging is enabled.
|
||||
@param NewStack A pointer to the new stack to use for the EntryPoint
|
||||
function after paging is enabled.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InternalX86EnablePaging32 (
|
||||
IN SWITCH_STACK_ENTRY_POINT EntryPoint,
|
||||
IN VOID *Context1, OPTIONAL
|
||||
IN VOID *Context2, OPTIONAL
|
||||
IN VOID *NewStack
|
||||
);
|
||||
|
||||
/**
|
||||
Disables the 32-bit paging mode on the CPU.
|
||||
|
||||
Disables the 32-bit paging mode on the CPU and returns to 32-bit protected
|
||||
mode. This function assumes the current execution mode is 32-paged protected
|
||||
mode. This function is only available on IA-32. After the 32-bit paging mode
|
||||
is disabled, 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 NULL. The function EntryPoint must never return.
|
||||
|
||||
There are a number of constraints that must be followed before calling this
|
||||
function:
|
||||
1) Interrupts must be disabled.
|
||||
2) The caller must be in 32-bit paged mode.
|
||||
3) CR0, CR3, and CR4 must be compatible with 32-bit paged mode.
|
||||
4) CR3 must point to valid page tables that guarantee that the pages for
|
||||
this function and the stack are identity mapped.
|
||||
|
||||
@param EntryPoint A pointer to function to call with the new stack after
|
||||
paging is disabled.
|
||||
@param Context1 A pointer to the context to pass into the EntryPoint
|
||||
function as the first parameter after paging is disabled.
|
||||
@param Context2 A pointer to the context to pass into the EntryPoint
|
||||
function as the second parameter after paging is
|
||||
disabled.
|
||||
@param NewStack A pointer to the new stack to use for the EntryPoint
|
||||
function after paging is disabled.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InternalX86DisablePaging32 (
|
||||
IN SWITCH_STACK_ENTRY_POINT EntryPoint,
|
||||
IN VOID *Context1, OPTIONAL
|
||||
IN VOID *Context2, OPTIONAL
|
||||
IN VOID *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.
|
||||
|
||||
@param 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.
|
||||
@param EntryPoint The 64-bit virtual address of the function to call with
|
||||
the new stack after paging is enabled.
|
||||
@param Context1 The 64-bit virtual address of the context to pass into
|
||||
the EntryPoint function as the first parameter after
|
||||
paging is enabled.
|
||||
@param Context2 The 64-bit virtual address of the context to pass into
|
||||
the EntryPoint function as the second parameter after
|
||||
paging is enabled.
|
||||
@param NewStack The 64-bit virtual address of the new stack to use for
|
||||
the EntryPoint function after paging is enabled.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InternalX86EnablePaging64 (
|
||||
IN UINT16 Cs,
|
||||
IN UINT64 EntryPoint,
|
||||
IN UINT64 Context1, OPTIONAL
|
||||
IN UINT64 Context2, OPTIONAL
|
||||
IN UINT64 NewStack
|
||||
);
|
||||
|
||||
/**
|
||||
Disables the 64-bit paging mode on the CPU.
|
||||
|
||||
Disables the 64-bit paging mode on the CPU and returns to 32-bit protected
|
||||
mode. This function assumes the current execution mode is 64-paging mode.
|
||||
This function is only available on X64. After the 64-bit paging mode is
|
||||
disabled, 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.
|
||||
|
||||
@param 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 32-bit protected mode.
|
||||
@param EntryPoint The 64-bit virtual address of the function to call with
|
||||
the new stack after paging is disabled.
|
||||
@param Context1 The 64-bit virtual address of the context to pass into
|
||||
the EntryPoint function as the first parameter after
|
||||
paging is disabled.
|
||||
@param Context2 The 64-bit virtual address of the context to pass into
|
||||
the EntryPoint function as the second parameter after
|
||||
paging is disabled.
|
||||
@param NewStack The 64-bit virtual address of the new stack to use for
|
||||
the EntryPoint function after paging is disabled.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
InternalX86DisablePaging64 (
|
||||
IN UINT16 Cs,
|
||||
IN UINT32 EntryPoint,
|
||||
IN UINT32 Context1, OPTIONAL
|
||||
IN UINT32 Context2, OPTIONAL
|
||||
IN UINT32 NewStack
|
||||
);
|
||||
|
||||
|
||||
#elif defined (MDE_CPU_IPF)
|
||||
//
|
||||
//
|
||||
// IPF specific functions
|
||||
//
|
||||
|
||||
/**
|
||||
Transfers control to a function starting with a new stack.
|
||||
|
||||
Transfers control 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 NULL. The function
|
||||
EntryPoint must never return.
|
||||
|
||||
If EntryPoint is NULL, then ASSERT().
|
||||
If NewStack is NULL, then ASSERT().
|
||||
|
||||
@param EntryPoint A pointer to function to call with the new stack.
|
||||
@param Context1 A pointer to the context to pass into the EntryPoint
|
||||
function.
|
||||
@param Context2 A pointer to the context to pass into the EntryPoint
|
||||
function.
|
||||
@param NewStack A pointer to the new stack to use for the EntryPoint
|
||||
function.
|
||||
@param NewBsp A pointer to the new memory location for RSE backing
|
||||
store.
|
||||
|
||||
**/
|
||||
VOID
|
||||
EFIAPI
|
||||
AsmSwitchStackAndBackingStore (
|
||||
IN SWITCH_STACK_ENTRY_POINT EntryPoint,
|
||||
IN VOID *Context1, OPTIONAL
|
||||
IN VOID *Context2, OPTIONAL
|
||||
IN VOID *NewStack,
|
||||
IN VOID *NewBsp
|
||||
);
|
||||
#else
|
||||
|
||||
#endif
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user