mirror of https://github.com/acidanthera/audk.git
873 lines
29 KiB
C
873 lines
29 KiB
C
/** @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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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
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Value and returns the incremented value. The increment operation must be
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performed using MP safe mechanisms. The state of the return value is not
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guaranteed to be MP safe.
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@param Value A pointer to the 32-bit value to increment.
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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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);
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/**
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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
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Value and returns the decrement value. The decrement operation must be
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performed using MP safe mechanisms. The state of the return value is not
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guaranteed to be MP safe.
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@param Value A pointer to the 32-bit value to decrement.
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@return The decrement value.
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**/
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UINT32
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EFIAPI
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InternalSyncDecrement (
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IN volatile UINT32 *Value
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);
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/**
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Performs an atomic compare exchange operation on a 32-bit unsigned integer.
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Performs an atomic compare exchange operation on the 32-bit unsigned integer
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specified by Value. If Value is equal to CompareValue, then Value is set to
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ExchangeValue and CompareValue is returned. If Value is not equal to CompareValue,
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then Value is returned. The compare exchange operation must be performed using
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MP safe mechanisms.
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@param Value A pointer to the 32-bit value for the compare exchange
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operation.
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@param CompareValue 32-bit value used in compare operation.
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@param ExchangeValue 32-bit value used in exchange operation.
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@return The original *Value before exchange.
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**/
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UINT32
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EFIAPI
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InternalSyncCompareExchange32 (
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IN volatile UINT32 *Value,
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IN UINT32 CompareValue,
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IN UINT32 ExchangeValue
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);
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/**
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Performs an atomic compare exchange operation on a 64-bit unsigned integer.
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Performs an atomic compare exchange operation on the 64-bit unsigned integer specified
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by Value. If Value is equal to CompareValue, then Value is set to ExchangeValue and
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CompareValue is returned. If Value is not equal to CompareValue, then Value is returned.
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The compare exchange operation must be performed using MP safe mechanisms.
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@param Value A pointer to the 64-bit value for the compare exchange
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operation.
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@param CompareValue 64-bit value used in compare operation.
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@param ExchangeValue 64-bit value used in exchange operation.
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@return The original *Value before exchange.
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**/
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UINT64
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EFIAPI
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InternalSyncCompareExchange64 (
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IN volatile UINT64 *Value,
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IN UINT64 CompareValue,
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IN UINT64 ExchangeValue
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);
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/**
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Worker function that returns a bit field from Operand
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Returns the bitfield specified by the StartBit and the EndBit from Operand.
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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@param EndBit The ordinal of the most significant bit in the bit field.
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@return The bit field read.
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**/
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unsigned int
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BitFieldReadUint (
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IN unsigned int Operand,
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IN UINTN StartBit,
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IN UINTN EndBit
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);
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/**
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Worker function that reads a bit field from Operand, performs a bitwise OR,
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and returns the result.
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Performs a bitwise OR between the bit field specified by StartBit and EndBit
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in Operand and the value specified by AndData. All other bits in Operand are
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preserved. The new value is returned.
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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@param EndBit The ordinal of the most significant bit in the bit field.
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@param OrData The value to OR with the read value from the value
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@return The new value.
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**/
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unsigned int
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BitFieldOrUint (
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IN unsigned int Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN unsigned int OrData
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);
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/**
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Worker function that reads a bit field from Operand, performs a bitwise AND,
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and returns the result.
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Performs a bitwise AND between the bit field specified by StartBit and EndBit
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in Operand and the value specified by AndData. All other bits in Operand are
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preserved. The new value is returned.
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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@param EndBit The ordinal of the most significant bit in the bit field.
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@param AndData The value to And with the read value from the value
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@return The new value.
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**/
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unsigned int
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BitFieldAndUint (
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IN unsigned int Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN unsigned int AndData
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);
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/**
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Worker function that checks ASSERT condition for JumpBuffer
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Checks ASSERT condition for JumpBuffer.
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If JumpBuffer is NULL, then ASSERT().
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For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT().
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@param JumpBuffer A pointer to CPU context buffer.
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**/
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VOID
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InternalAssertJumpBuffer (
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IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer
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);
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/**
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Restores the CPU context that was saved with SetJump().
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Restores the CPU context from the buffer specified by JumpBuffer.
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This function never returns to the caller.
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Instead is resumes execution based on the state of JumpBuffer.
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@param JumpBuffer A pointer to CPU context buffer.
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@param Value The value to return when the SetJump() context is restored.
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**/
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VOID
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EFIAPI
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InternalLongJump (
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IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer,
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IN UINTN Value
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);
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//
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// Ia32 and x64 specific functions
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//
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#if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64)
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/**
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Reads the current Global Descriptor Table Register(GDTR) descriptor.
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Reads and returns the current GDTR descriptor and returns it in Gdtr. This
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function is only available on IA-32 and X64.
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@param Gdtr Pointer to a GDTR descriptor.
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**/
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VOID
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EFIAPI
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InternalX86ReadGdtr (
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OUT IA32_DESCRIPTOR *Gdtr
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);
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/**
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Writes the current Global Descriptor Table Register (GDTR) descriptor.
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Writes and the current GDTR descriptor specified by Gdtr. This function is
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only available on IA-32 and X64.
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@param Gdtr Pointer to a GDTR descriptor.
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**/
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VOID
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EFIAPI
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InternalX86WriteGdtr (
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IN CONST IA32_DESCRIPTOR *Gdtr
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);
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/**
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Reads the current Interrupt Descriptor Table Register(GDTR) descriptor.
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Reads and returns the current IDTR descriptor and returns it in Idtr. This
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function is only available on IA-32 and X64.
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@param Idtr Pointer to a IDTR descriptor.
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**/
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VOID
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EFIAPI
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InternalX86ReadIdtr (
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OUT IA32_DESCRIPTOR *Idtr
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);
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/**
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Writes the current Interrupt Descriptor Table Register(GDTR) descriptor.
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Writes the current IDTR descriptor and returns it in Idtr. This function is
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only available on IA-32 and X64.
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@param Idtr Pointer to a IDTR descriptor.
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**/
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VOID
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EFIAPI
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InternalX86WriteIdtr (
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IN CONST IA32_DESCRIPTOR *Idtr
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);
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/**
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Save the current floating point/SSE/SSE2 context to a buffer.
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Saves the current floating point/SSE/SSE2 state to the buffer specified by
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Buffer. Buffer must be aligned on a 16-byte boundary. This function is only
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available on IA-32 and X64.
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@param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context.
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**/
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VOID
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EFIAPI
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InternalX86FxSave (
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OUT IA32_FX_BUFFER *Buffer
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);
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/**
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Restores the current floating point/SSE/SSE2 context from a buffer.
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Restores the current floating point/SSE/SSE2 state from the buffer specified
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by Buffer. Buffer must be aligned on a 16-byte boundary. This function is
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only available on IA-32 and X64.
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@param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context.
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**/
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VOID
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EFIAPI
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InternalX86FxRestore (
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IN CONST IA32_FX_BUFFER *Buffer
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);
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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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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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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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Disables the 64-bit paging mode on the CPU.
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Disables the 64-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 64-paging mode.
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This function is only available on X64. After the 64-bit paging mode is
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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 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 32-bit protected 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 disabled.
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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 disabled.
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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 disabled.
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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 disabled.
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**/
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VOID
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EFIAPI
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InternalX86DisablePaging64 (
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IN UINT16 Cs,
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IN UINT32 EntryPoint,
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IN UINT32 Context1, OPTIONAL
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IN UINT32 Context2, OPTIONAL
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IN UINT32 NewStack
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);
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#elif defined (MDE_CPU_IPF)
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//
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//
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// IPF specific functions
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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 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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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 NewBsp A pointer to the new memory location for RSE backing
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store.
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**/
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VOID
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EFIAPI
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AsmSwitchStackAndBackingStore (
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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 VOID *NewBsp
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);
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#else
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#endif
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#endif
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