MdePkg/Library/BaseLib/X64/GccInline.c File Reference


Functions

VOID EFIAPI MemoryFence (VOID)
VOID EFIAPI EnableInterrupts (VOID)
VOID EFIAPI DisableInterrupts (VOID)
VOID EFIAPI CpuPause (VOID)
VOID EFIAPI CpuBreakpoint (VOID)
UINT64 EFIAPI AsmReadMsr64 (IN UINT32 Index)
UINT64 EFIAPI AsmWriteMsr64 (IN UINT32 Index, IN UINT64 Value)
UINTN EFIAPI AsmReadEflags (VOID)
UINTN EFIAPI AsmReadCr0 (VOID)
UINTN EFIAPI AsmReadCr2 (VOID)
UINTN EFIAPI AsmReadCr3 (VOID)
UINTN EFIAPI AsmReadCr4 (VOID)
UINTN EFIAPI AsmWriteCr0 (UINTN Cr0)
UINTN EFIAPI AsmWriteCr2 (UINTN Cr2)
UINTN EFIAPI AsmWriteCr3 (UINTN Cr3)
UINTN EFIAPI AsmWriteCr4 (UINTN Cr4)
UINTN EFIAPI AsmReadDr0 (VOID)
UINTN EFIAPI AsmReadDr1 (VOID)
UINTN EFIAPI AsmReadDr2 (VOID)
UINTN EFIAPI AsmReadDr3 (VOID)
UINTN EFIAPI AsmReadDr4 (VOID)
UINTN EFIAPI AsmReadDr5 (VOID)
UINTN EFIAPI AsmReadDr6 (VOID)
UINTN EFIAPI AsmReadDr7 (VOID)
UINTN EFIAPI AsmWriteDr0 (UINTN Dr0)
UINTN EFIAPI AsmWriteDr1 (UINTN Dr1)
UINTN EFIAPI AsmWriteDr2 (UINTN Dr2)
UINTN EFIAPI AsmWriteDr3 (UINTN Dr3)
UINTN EFIAPI AsmWriteDr4 (UINTN Dr4)
UINTN EFIAPI AsmWriteDr5 (UINTN Dr5)
UINTN EFIAPI AsmWriteDr6 (UINTN Dr6)
UINTN EFIAPI AsmWriteDr7 (UINTN Dr7)
UINT16 EFIAPI AsmReadCs (VOID)
UINT16 EFIAPI AsmReadDs (VOID)
UINT16 EFIAPI AsmReadEs (VOID)
UINT16 EFIAPI AsmReadFs (VOID)
UINT16 EFIAPI AsmReadGs (VOID)
UINT16 EFIAPI AsmReadSs (VOID)
UINT16 EFIAPI AsmReadTr (VOID)
VOID EFIAPI InternalX86ReadGdtr (OUT IA32_DESCRIPTOR *Gdtr)
VOID EFIAPI InternalX86WriteGdtr (IN CONST IA32_DESCRIPTOR *Gdtr)
VOID EFIAPI InternalX86ReadIdtr (OUT IA32_DESCRIPTOR *Idtr)
VOID EFIAPI InternalX86WriteIdtr (IN CONST IA32_DESCRIPTOR *Idtr)
UINT16 EFIAPI AsmReadLdtr (VOID)
VOID EFIAPI AsmWriteLdtr (IN UINT16 Ldtr)
VOID EFIAPI InternalX86FxSave (OUT IA32_FX_BUFFER *Buffer)
VOID EFIAPI InternalX86FxRestore (IN CONST IA32_FX_BUFFER *Buffer)
UINT64 EFIAPI AsmReadMm0 (VOID)
UINT64 EFIAPI AsmReadMm1 (VOID)
UINT64 EFIAPI AsmReadMm2 (VOID)
UINT64 EFIAPI AsmReadMm3 (VOID)
UINT64 EFIAPI AsmReadMm4 (VOID)
UINT64 EFIAPI AsmReadMm5 (VOID)
UINT64 EFIAPI AsmReadMm6 (VOID)
UINT64 EFIAPI AsmReadMm7 (VOID)
VOID EFIAPI AsmWriteMm0 (IN UINT64 Value)
VOID EFIAPI AsmWriteMm1 (IN UINT64 Value)
VOID EFIAPI AsmWriteMm2 (IN UINT64 Value)
VOID EFIAPI AsmWriteMm3 (IN UINT64 Value)
VOID EFIAPI AsmWriteMm4 (IN UINT64 Value)
VOID EFIAPI AsmWriteMm5 (IN UINT64 Value)
VOID EFIAPI AsmWriteMm6 (IN UINT64 Value)
VOID EFIAPI AsmWriteMm7 (IN UINT64 Value)
UINT64 EFIAPI AsmReadTsc (VOID)
UINT64 EFIAPI AsmReadPmc (IN UINT32 Index)
UINTN EFIAPI AsmMonitor (IN UINTN Eax, IN UINTN Ecx, IN UINTN Edx)
UINTN EFIAPI AsmMwait (IN UINTN Eax, IN UINTN Ecx)
VOID EFIAPI AsmWbinvd (VOID)
VOID EFIAPI AsmInvd (VOID)
VOID *EFIAPI AsmFlushCacheLine (IN VOID *LinearAddress)

Detailed Description

GCC inline implementation of BaseLib processor specific functions.

Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.
Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License which accompanies this distribution. The full text of the license may be found at http://opensource.org/licenses/bsd-license.php.

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.


Function Documentation

VOID* EFIAPI AsmFlushCacheLine ( IN VOID *  LinearAddress  ) 

Flushes a cache line from all the instruction and data caches within the coherency domain of the CPU.

Flushed the cache line specified by LinearAddress, and returns LinearAddress. This function is only available on IA-32 and X64.

Parameters:
LinearAddress The address of the cache line to flush. If the CPU is in a physical addressing mode, then LinearAddress is a physical address. If the CPU is in a virtual addressing mode, then LinearAddress is a virtual address.
Returns:
LinearAddress

VOID EFIAPI AsmInvd ( VOID   ) 

Executes a INVD instruction.

Executes a INVD instruction. This function is only available on IA-32 and X64.

UINTN EFIAPI AsmMonitor ( IN UINTN  Eax,
IN UINTN  Ecx,
IN UINTN  Edx 
)

Sets up a monitor buffer that is used by AsmMwait().

Executes a MONITOR instruction with the register state specified by Eax, Ecx and Edx. Returns Eax. This function is only available on IA-32 and X64.

Parameters:
Eax The value to load into EAX or RAX before executing the MONITOR instruction.
Ecx The value to load into ECX or RCX before executing the MONITOR instruction.
Edx The value to load into EDX or RDX before executing the MONITOR instruction.
Returns:
Eax

UINTN EFIAPI AsmMwait ( IN UINTN  Eax,
IN UINTN  Ecx 
)

Executes an MWAIT instruction.

Executes an MWAIT instruction with the register state specified by Eax and Ecx. Returns Eax. This function is only available on IA-32 and X64.

Parameters:
Eax The value to load into EAX or RAX before executing the MONITOR instruction.
Ecx The value to load into ECX or RCX before executing the MONITOR instruction.
Returns:
Eax

UINTN EFIAPI AsmReadCr0 ( VOID   ) 

Reads the current value of the Control Register 0 (CR0).

Reads and returns the current value of CR0. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of the Control Register 0 (CR0).

UINTN EFIAPI AsmReadCr2 ( VOID   ) 

Reads the current value of the Control Register 2 (CR2).

Reads and returns the current value of CR2. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of the Control Register 2 (CR2).

UINTN EFIAPI AsmReadCr3 ( VOID   ) 

Reads the current value of the Control Register 3 (CR3).

Reads and returns the current value of CR3. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of the Control Register 3 (CR3).

UINTN EFIAPI AsmReadCr4 ( VOID   ) 

Reads the current value of the Control Register 4 (CR4).

Reads and returns the current value of CR4. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of the Control Register 4 (CR4).

UINT16 EFIAPI AsmReadCs ( VOID   ) 

Reads the current value of Code Segment Register (CS).

Reads and returns the current value of CS. This function is only available on IA-32 and X64.

Returns:
The current value of CS.

UINTN EFIAPI AsmReadDr0 ( VOID   ) 

Reads the current value of Debug Register 0 (DR0).

Reads and returns the current value of DR0. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of Debug Register 0 (DR0).

UINTN EFIAPI AsmReadDr1 ( VOID   ) 

Reads the current value of Debug Register 1 (DR1).

Reads and returns the current value of DR1. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of Debug Register 1 (DR1).

UINTN EFIAPI AsmReadDr2 ( VOID   ) 

Reads the current value of Debug Register 2 (DR2).

Reads and returns the current value of DR2. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of Debug Register 2 (DR2).

UINTN EFIAPI AsmReadDr3 ( VOID   ) 

Reads the current value of Debug Register 3 (DR3).

Reads and returns the current value of DR3. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of Debug Register 3 (DR3).

UINTN EFIAPI AsmReadDr4 ( VOID   ) 

Reads the current value of Debug Register 4 (DR4).

Reads and returns the current value of DR4. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of Debug Register 4 (DR4).

UINTN EFIAPI AsmReadDr5 ( VOID   ) 

Reads the current value of Debug Register 5 (DR5).

Reads and returns the current value of DR5. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of Debug Register 5 (DR5).

UINTN EFIAPI AsmReadDr6 ( VOID   ) 

Reads the current value of Debug Register 6 (DR6).

Reads and returns the current value of DR6. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of Debug Register 6 (DR6).

UINTN EFIAPI AsmReadDr7 ( VOID   ) 

Reads the current value of Debug Register 7 (DR7).

Reads and returns the current value of DR7. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
The value of Debug Register 7 (DR7).

UINT16 EFIAPI AsmReadDs ( VOID   ) 

Reads the current value of Data Segment Register (DS).

Reads and returns the current value of DS. This function is only available on IA-32 and X64.

Returns:
The current value of DS.

UINTN EFIAPI AsmReadEflags ( VOID   ) 

Reads the current value of the EFLAGS register.

Reads and returns the current value of the EFLAGS register. This function is only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on X64.

Returns:
EFLAGS on IA-32 or RFLAGS on X64.

UINT16 EFIAPI AsmReadEs ( VOID   ) 

Reads the current value of Extra Segment Register (ES).

Reads and returns the current value of ES. This function is only available on IA-32 and X64.

Returns:
The current value of ES.

UINT16 EFIAPI AsmReadFs ( VOID   ) 

Reads the current value of FS Data Segment Register (FS).

Reads and returns the current value of FS. This function is only available on IA-32 and X64.

Returns:
The current value of FS.

UINT16 EFIAPI AsmReadGs ( VOID   ) 

Reads the current value of GS Data Segment Register (GS).

Reads and returns the current value of GS. This function is only available on IA-32 and X64.

Returns:
The current value of GS.

UINT16 EFIAPI AsmReadLdtr ( VOID   ) 

Reads the current Local Descriptor Table Register(LDTR) selector.

Reads and returns the current 16-bit LDTR descriptor value. This function is only available on IA-32 and X64.

Returns:
The current selector of LDT.

UINT64 EFIAPI AsmReadMm0 ( VOID   ) 

Reads the current value of 64-bit MMX Register #0 (MM0).

Reads and returns the current value of MM0. This function is only available on IA-32 and X64.

Returns:
The current value of MM0.

UINT64 EFIAPI AsmReadMm1 ( VOID   ) 

Reads the current value of 64-bit MMX Register #1 (MM1).

Reads and returns the current value of MM1. This function is only available on IA-32 and X64.

Returns:
The current value of MM1.

UINT64 EFIAPI AsmReadMm2 ( VOID   ) 

Reads the current value of 64-bit MMX Register #2 (MM2).

Reads and returns the current value of MM2. This function is only available on IA-32 and X64.

Returns:
The current value of MM2.

UINT64 EFIAPI AsmReadMm3 ( VOID   ) 

Reads the current value of 64-bit MMX Register #3 (MM3).

Reads and returns the current value of MM3. This function is only available on IA-32 and X64.

Returns:
The current value of MM3.

UINT64 EFIAPI AsmReadMm4 ( VOID   ) 

Reads the current value of 64-bit MMX Register #4 (MM4).

Reads and returns the current value of MM4. This function is only available on IA-32 and X64.

Returns:
The current value of MM4.

UINT64 EFIAPI AsmReadMm5 ( VOID   ) 

Reads the current value of 64-bit MMX Register #5 (MM5).

Reads and returns the current value of MM5. This function is only available on IA-32 and X64.

Returns:
The current value of MM5.

UINT64 EFIAPI AsmReadMm6 ( VOID   ) 

Reads the current value of 64-bit MMX Register #6 (MM6).

Reads and returns the current value of MM6. This function is only available on IA-32 and X64.

Returns:
The current value of MM6.

UINT64 EFIAPI AsmReadMm7 ( VOID   ) 

Reads the current value of 64-bit MMX Register #7 (MM7).

Reads and returns the current value of MM7. This function is only available on IA-32 and X64.

Returns:
The current value of MM7.

UINT64 EFIAPI AsmReadMsr64 ( IN UINT32  Index  ) 

Returns a 64-bit Machine Specific Register(MSR).

Reads and returns the 64-bit MSR specified by Index. No parameter checking is performed on Index, and some Index values may cause CPU exceptions. The caller must either guarantee that Index is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and X64.

Parameters:
Index The 32-bit MSR index to read.
Returns:
The value of the MSR identified by Index.

UINT64 EFIAPI AsmReadPmc ( IN UINT32  Index  ) 

Reads the current value of a Performance Counter (PMC).

Reads and returns the current value of performance counter specified by Index. This function is only available on IA-32 and X64.

Parameters:
Index The 32-bit Performance Counter index to read.
Returns:
The value of the PMC specified by Index.

UINT16 EFIAPI AsmReadSs ( VOID   ) 

Reads the current value of Stack Segment Register (SS).

Reads and returns the current value of SS. This function is only available on IA-32 and X64.

Returns:
The current value of SS.

UINT16 EFIAPI AsmReadTr ( VOID   ) 

Reads the current value of Task Register (TR).

Reads and returns the current value of TR. This function is only available on IA-32 and X64.

Returns:
The current value of TR.

UINT64 EFIAPI AsmReadTsc ( VOID   ) 

Reads the current value of Time Stamp Counter (TSC).

Reads and returns the current value of TSC. This function is only available on IA-32 and X64.

Returns:
The current value of TSC

VOID EFIAPI AsmWbinvd ( VOID   ) 

Executes a WBINVD instruction.

Executes a WBINVD instruction. This function is only available on IA-32 and X64.

UINTN EFIAPI AsmWriteCr0 ( UINTN  Cr0  ) 

Writes a value to Control Register 0 (CR0).

Writes and returns a new value to CR0. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Cr0 The value to write to CR0.
Returns:
The value written to CR0.

UINTN EFIAPI AsmWriteCr2 ( UINTN  Cr2  ) 

Writes a value to Control Register 2 (CR2).

Writes and returns a new value to CR2. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Cr2 The value to write to CR2.
Returns:
The value written to CR2.

UINTN EFIAPI AsmWriteCr3 ( UINTN  Cr3  ) 

Writes a value to Control Register 3 (CR3).

Writes and returns a new value to CR3. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Cr3 The value to write to CR3.
Returns:
The value written to CR3.

UINTN EFIAPI AsmWriteCr4 ( UINTN  Cr4  ) 

Writes a value to Control Register 4 (CR4).

Writes and returns a new value to CR4. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Cr4 The value to write to CR4.
Returns:
The value written to CR4.

UINTN EFIAPI AsmWriteDr0 ( UINTN  Dr0  ) 

Writes a value to Debug Register 0 (DR0).

Writes and returns a new value to DR0. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Dr0 The value to write to Dr0.
Returns:
The value written to Debug Register 0 (DR0).

UINTN EFIAPI AsmWriteDr1 ( UINTN  Dr1  ) 

Writes a value to Debug Register 1 (DR1).

Writes and returns a new value to DR1. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Dr1 The value to write to Dr1.
Returns:
The value written to Debug Register 1 (DR1).

UINTN EFIAPI AsmWriteDr2 ( UINTN  Dr2  ) 

Writes a value to Debug Register 2 (DR2).

Writes and returns a new value to DR2. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Dr2 The value to write to Dr2.
Returns:
The value written to Debug Register 2 (DR2).

UINTN EFIAPI AsmWriteDr3 ( UINTN  Dr3  ) 

Writes a value to Debug Register 3 (DR3).

Writes and returns a new value to DR3. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Dr3 The value to write to Dr3.
Returns:
The value written to Debug Register 3 (DR3).

UINTN EFIAPI AsmWriteDr4 ( UINTN  Dr4  ) 

Writes a value to Debug Register 4 (DR4).

Writes and returns a new value to DR4. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Dr4 The value to write to Dr4.
Returns:
The value written to Debug Register 4 (DR4).

UINTN EFIAPI AsmWriteDr5 ( UINTN  Dr5  ) 

Writes a value to Debug Register 5 (DR5).

Writes and returns a new value to DR5. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Dr5 The value to write to Dr5.
Returns:
The value written to Debug Register 5 (DR5).

UINTN EFIAPI AsmWriteDr6 ( UINTN  Dr6  ) 

Writes a value to Debug Register 6 (DR6).

Writes and returns a new value to DR6. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Dr6 The value to write to Dr6.
Returns:
The value written to Debug Register 6 (DR6).

UINTN EFIAPI AsmWriteDr7 ( UINTN  Dr7  ) 

Writes a value to Debug Register 7 (DR7).

Writes and returns a new value to DR7. This function is only available on IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64.

Parameters:
Dr7 The value to write to Dr7.
Returns:
The value written to Debug Register 7 (DR7).

VOID EFIAPI AsmWriteLdtr ( IN UINT16  Ldtr  ) 

Writes the current Local Descriptor Table Register (GDTR) selector.

Writes and the current LDTR descriptor specified by Ldtr. This function is only available on IA-32 and X64.

Parameters:
Ldtr 16-bit LDTR selector value.

VOID EFIAPI AsmWriteMm0 ( IN UINT64  Value  ) 

Writes the current value of 64-bit MMX Register #0 (MM0).

Writes the current value of MM0. This function is only available on IA32 and X64.

Parameters:
Value The 64-bit value to write to MM0.

VOID EFIAPI AsmWriteMm1 ( IN UINT64  Value  ) 

Writes the current value of 64-bit MMX Register #1 (MM1).

Writes the current value of MM1. This function is only available on IA32 and X64.

Parameters:
Value The 64-bit value to write to MM1.

VOID EFIAPI AsmWriteMm2 ( IN UINT64  Value  ) 

Writes the current value of 64-bit MMX Register #2 (MM2).

Writes the current value of MM2. This function is only available on IA32 and X64.

Parameters:
Value The 64-bit value to write to MM2.

VOID EFIAPI AsmWriteMm3 ( IN UINT64  Value  ) 

Writes the current value of 64-bit MMX Register #3 (MM3).

Writes the current value of MM3. This function is only available on IA32 and X64.

Parameters:
Value The 64-bit value to write to MM3.

VOID EFIAPI AsmWriteMm4 ( IN UINT64  Value  ) 

Writes the current value of 64-bit MMX Register #4 (MM4).

Writes the current value of MM4. This function is only available on IA32 and X64.

Parameters:
Value The 64-bit value to write to MM4.

VOID EFIAPI AsmWriteMm5 ( IN UINT64  Value  ) 

Writes the current value of 64-bit MMX Register #5 (MM5).

Writes the current value of MM5. This function is only available on IA32 and X64.

Parameters:
Value The 64-bit value to write to MM5.

VOID EFIAPI AsmWriteMm6 ( IN UINT64  Value  ) 

Writes the current value of 64-bit MMX Register #6 (MM6).

Writes the current value of MM6. This function is only available on IA32 and X64.

Parameters:
Value The 64-bit value to write to MM6.

VOID EFIAPI AsmWriteMm7 ( IN UINT64  Value  ) 

Writes the current value of 64-bit MMX Register #7 (MM7).

Writes the current value of MM7. This function is only available on IA32 and X64.

Parameters:
Value The 64-bit value to write to MM7.

UINT64 EFIAPI AsmWriteMsr64 ( IN UINT32  Index,
IN UINT64  Value 
)

Writes a 64-bit value to a Machine Specific Register(MSR), and returns the value.

Writes the 64-bit value specified by Value to the MSR specified by Index. The 64-bit value written to the MSR is returned. No parameter checking is performed on Index or Value, and some of these may cause CPU exceptions. The caller must either guarantee that Index and Value are valid, or the caller must establish proper exception handlers. This function is only available on IA-32 and X64.

Parameters:
Index The 32-bit MSR index to write.
Value The 64-bit value to write to the MSR.
Returns:
Value

VOID EFIAPI CpuBreakpoint ( VOID   ) 

Generates a breakpoint on the CPU.

Generates a breakpoint on the CPU. The breakpoint must be implemented such that code can resume normal execution after the breakpoint.

VOID EFIAPI CpuPause ( VOID   ) 

Requests CPU to pause for a short period of time.

Requests CPU to pause for a short period of time. Typically used in MP systems to prevent memory starvation while waiting for a spin lock.

VOID EFIAPI DisableInterrupts ( VOID   ) 

Disables CPU interrupts.

Disables CPU interrupts.

VOID EFIAPI EnableInterrupts ( VOID   ) 

Enables CPU interrupts.

Enables CPU interrupts.

VOID EFIAPI InternalX86FxRestore ( IN CONST 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.

Parameters:
Buffer The pointer to a buffer to save the floating point/SSE/SSE2 context.

VOID EFIAPI InternalX86FxSave ( OUT IA32_FX_BUFFER Buffer  ) 

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.

Parameters:
Buffer The pointer to a buffer to save the floating point/SSE/SSE2 context.

VOID EFIAPI InternalX86ReadGdtr ( OUT IA32_DESCRIPTOR Gdtr  ) 

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.

Parameters:
Gdtr The pointer to a GDTR descriptor.

VOID EFIAPI InternalX86ReadIdtr ( OUT IA32_DESCRIPTOR Idtr  ) 

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.

Parameters:
Idtr The pointer to a IDTR descriptor.

VOID EFIAPI InternalX86WriteGdtr ( IN CONST 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.

Parameters:
Gdtr The pointer to a GDTR descriptor.

VOID EFIAPI InternalX86WriteIdtr ( IN CONST 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.

Parameters:
Idtr The pointer to a IDTR descriptor.

VOID EFIAPI MemoryFence ( VOID   ) 

Used to serialize load and store operations.

All loads and stores that proceed calls to this function are guaranteed to be globally visible when this function returns.


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