diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/GccInline.c | 3516 |
1 files changed, 1758 insertions, 1758 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/GccInline.c b/MdePkg/Library/BaseLib/Ia32/GccInline.c index 6118676..e0600e1 100644 --- a/MdePkg/Library/BaseLib/Ia32/GccInline.c +++ b/MdePkg/Library/BaseLib/Ia32/GccInline.c @@ -1,1758 +1,1758 @@ -/** @file - GCC inline implementation of BaseLib processor specific functions. - - Copyright (c) 2006 - 2007, Intel Corporation<BR> - Portions copyright (c) 2008-2009 Apple Inc.<BR> - 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. - -**/ - - -#include "BaseLibInternals.h" - - - -/** - 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. - -**/ -VOID -EFIAPI -MemoryFence ( - VOID - ) -{ - // This is a little bit of overkill and it is more about the compiler that it is - // actually processor syncronization. This is like the _ReadWriteBarrier - // Microsft specific intrinsic - __asm__ __volatile__ ("":::"memory"); -} - - -/** - Enables CPU interrupts. - - Enables CPU interrupts. - -**/ -VOID -EFIAPI -EnableInterrupts ( - VOID - ) -{ - __asm__ __volatile__ ("sti"::: "memory"); -} - - -/** - Disables CPU interrupts. - - Disables CPU interrupts. - -**/ -VOID -EFIAPI -DisableInterrupts ( - VOID - ) -{ - __asm__ __volatile__ ("cli"::: "memory"); -} - - - - -/** - 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 -CpuPause ( - VOID - ) -{ - __asm__ __volatile__ ("pause"); -} - - -/** - 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 -CpuBreakpoint ( - VOID - ) -{ - __asm__ __volatile__ ("int $3"); -} - - - -/** - 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. - - @param Index The 32-bit MSR index to read. - - @return The value of the MSR identified by Index. - -**/ -UINT64 -EFIAPI -AsmReadMsr64 ( - IN UINT32 Index - ) -{ - UINT64 Data; - - __asm__ __volatile__ ( - "rdmsr" - : "=A" (Data) // %0 - : "c" (Index) // %1 - ); - - return Data; -} - -/** - 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. - - @param Index The 32-bit MSR index to write. - @param Value The 64-bit value to write to the MSR. - - @return Value - -**/ -UINT64 -EFIAPI -AsmWriteMsr64 ( - IN UINT32 Index, - IN UINT64 Value - ) -{ - __asm__ __volatile__ ( - "wrmsr" - : - : "c" (Index), - "A" (Value) - ); - - return Value; -} - - - -/** - 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. - - @return EFLAGS on IA-32 or RFLAGS on X64. - -**/ -UINTN -EFIAPI -AsmReadEflags ( - VOID - ) -{ - UINTN Eflags; - - __asm__ __volatile__ ( - "pushfl \n\t" - "popl %0 " - : "=r" (Eflags) - ); - - return Eflags; -} - - - -/** - 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. - - @return The value of the Control Register 0 (CR0). - -**/ -UINTN -EFIAPI -AsmReadCr0 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%cr0,%0" - : "=a" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The value of the Control Register 2 (CR2). - -**/ -UINTN -EFIAPI -AsmReadCr2 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%cr2, %0" - : "=r" (Data) - ); - - return Data; -} - -/** - 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. - - @return The value of the Control Register 3 (CR3). - -**/ -UINTN -EFIAPI -AsmReadCr3 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%cr3, %0" - : "=r" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The value of the Control Register 4 (CR4). - -**/ -UINTN -EFIAPI -AsmReadCr4 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%cr4, %0" - : "=a" (Data) - ); - - return Data; -} - - -/** - 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. - - @param Cr0 The value to write to CR0. - - @return The value written to CR0. - -**/ -UINTN -EFIAPI -AsmWriteCr0 ( - UINTN Cr0 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%cr0" - : - : "r" (Cr0) - ); - return Cr0; -} - - -/** - 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. - - @param Cr2 The value to write to CR2. - - @return The value written to CR2. - -**/ -UINTN -EFIAPI -AsmWriteCr2 ( - UINTN Cr2 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%cr2" - : - : "r" (Cr2) - ); - return Cr2; -} - - -/** - 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. - - @param Cr3 The value to write to CR3. - - @return The value written to CR3. - -**/ -UINTN -EFIAPI -AsmWriteCr3 ( - UINTN Cr3 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%cr3" - : - : "r" (Cr3) - ); - return Cr3; -} - - -/** - 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. - - @param Cr4 The value to write to CR4. - - @return The value written to CR4. - -**/ -UINTN -EFIAPI -AsmWriteCr4 ( - UINTN Cr4 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%cr4" - : - : "r" (Cr4) - ); - return Cr4; -} - - -/** - 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. - - @return The value of Debug Register 0 (DR0). - -**/ -UINTN -EFIAPI -AsmReadDr0 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%dr0, %0" - : "=r" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The value of Debug Register 1 (DR1). - -**/ -UINTN -EFIAPI -AsmReadDr1 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%dr1, %0" - : "=r" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The value of Debug Register 2 (DR2). - -**/ -UINTN -EFIAPI -AsmReadDr2 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%dr2, %0" - : "=r" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The value of Debug Register 3 (DR3). - -**/ -UINTN -EFIAPI -AsmReadDr3 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%dr3, %0" - : "=r" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The value of Debug Register 4 (DR4). - -**/ -UINTN -EFIAPI -AsmReadDr4 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%dr4, %0" - : "=r" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The value of Debug Register 5 (DR5). - -**/ -UINTN -EFIAPI -AsmReadDr5 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%dr5, %0" - : "=r" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The value of Debug Register 6 (DR6). - -**/ -UINTN -EFIAPI -AsmReadDr6 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%dr6, %0" - : "=r" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The value of Debug Register 7 (DR7). - -**/ -UINTN -EFIAPI -AsmReadDr7 ( - VOID - ) -{ - UINTN Data; - - __asm__ __volatile__ ( - "movl %%dr7, %0" - : "=r" (Data) - ); - - return Data; -} - - -/** - 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. - - @param Dr0 The value to write to Dr0. - - @return The value written to Debug Register 0 (DR0). - -**/ -UINTN -EFIAPI -AsmWriteDr0 ( - UINTN Dr0 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%dr0" - : - : "r" (Dr0) - ); - return Dr0; -} - - -/** - 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. - - @param Dr1 The value to write to Dr1. - - @return The value written to Debug Register 1 (DR1). - -**/ -UINTN -EFIAPI -AsmWriteDr1 ( - UINTN Dr1 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%dr1" - : - : "r" (Dr1) - ); - return Dr1; -} - - -/** - 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. - - @param Dr2 The value to write to Dr2. - - @return The value written to Debug Register 2 (DR2). - -**/ -UINTN -EFIAPI -AsmWriteDr2 ( - UINTN Dr2 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%dr2" - : - : "r" (Dr2) - ); - return Dr2; -} - - -/** - 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. - - @param Dr3 The value to write to Dr3. - - @return The value written to Debug Register 3 (DR3). - -**/ -UINTN -EFIAPI -AsmWriteDr3 ( - UINTN Dr3 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%dr3" - : - : "r" (Dr3) - ); - return Dr3; -} - - -/** - 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. - - @param Dr4 The value to write to Dr4. - - @return The value written to Debug Register 4 (DR4). - -**/ -UINTN -EFIAPI -AsmWriteDr4 ( - UINTN Dr4 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%dr4" - : - : "r" (Dr4) - ); - return Dr4; -} - - -/** - 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. - - @param Dr5 The value to write to Dr5. - - @return The value written to Debug Register 5 (DR5). - -**/ -UINTN -EFIAPI -AsmWriteDr5 ( - UINTN Dr5 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%dr5" - : - : "r" (Dr5) - ); - return Dr5; -} - - -/** - 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. - - @param Dr6 The value to write to Dr6. - - @return The value written to Debug Register 6 (DR6). - -**/ -UINTN -EFIAPI -AsmWriteDr6 ( - UINTN Dr6 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%dr6" - : - : "r" (Dr6) - ); - return Dr6; -} - - -/** - 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. - - @param Dr7 The value to write to Dr7. - - @return The value written to Debug Register 7 (DR7). - -**/ -UINTN -EFIAPI -AsmWriteDr7 ( - UINTN Dr7 - ) -{ - __asm__ __volatile__ ( - "movl %0, %%dr7" - : - : "r" (Dr7) - ); - return Dr7; -} - - -/** - 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. - - @return The current value of CS. - -**/ -UINT16 -EFIAPI -AsmReadCs ( - VOID - ) -{ - UINT16 Data; - - __asm__ __volatile__ ( - "mov %%cs, %0" - :"=a" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The current value of DS. - -**/ -UINT16 -EFIAPI -AsmReadDs ( - VOID - ) -{ - UINT16 Data; - - __asm__ __volatile__ ( - "mov %%ds, %0" - :"=a" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The current value of ES. - -**/ -UINT16 -EFIAPI -AsmReadEs ( - VOID - ) -{ - UINT16 Data; - - __asm__ __volatile__ ( - "mov %%es, %0" - :"=a" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The current value of FS. - -**/ -UINT16 -EFIAPI -AsmReadFs ( - VOID - ) -{ - UINT16 Data; - - __asm__ __volatile__ ( - "mov %%fs, %0" - :"=a" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The current value of GS. - -**/ -UINT16 -EFIAPI -AsmReadGs ( - VOID - ) -{ - UINT16 Data; - - __asm__ __volatile__ ( - "mov %%gs, %0" - :"=a" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The current value of SS. - -**/ -UINT16 -EFIAPI -AsmReadSs ( - VOID - ) -{ - UINT16 Data; - - __asm__ __volatile__ ( - "mov %%ds, %0" - :"=a" (Data) - ); - - return Data; -} - - -/** - 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. - - @return The current value of TR. - -**/ -UINT16 -EFIAPI -AsmReadTr ( - VOID - ) -{ - UINT16 Data; - - __asm__ __volatile__ ( - "str %0" - : "=a" (Data) - ); - - return Data; -} - - -/** - 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 - ) -{ - __asm__ __volatile__ ( - "sgdt %0" - : "=m" (*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 - ) -{ - __asm__ __volatile__ ( - "lgdt %0" - : - : "m" (*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 *Ldtr - ) -{ - __asm__ __volatile__ ( - "sldt %0" - : "=m" (*Ldtr) - ); -} - - -/** - 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 *Ldtr - ) -{ - __asm__ __volatile__ ( - "lidt %0" - : - : "m" (*Ldtr) - ); -} - - -/** - 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. - - @return The current selector of LDT. - -**/ -UINT16 -EFIAPI -AsmReadLdtr ( - VOID - ) -{ - UINT16 Data; - - __asm__ __volatile__ ( - "sldt %0" - : "=g" (Data) // %0 - ); - - return Data; -} - - -/** - 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. - - @param Ldtr 16-bit LDTR selector value. - -**/ -VOID -EFIAPI -AsmWriteLdtr ( - IN UINT16 Ldtr - ) -{ - __asm__ __volatile__ ( - "lldtw %0" - : - : "g" (Ldtr) // %0 - ); -} - - -/** - 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 - ) -{ - __asm__ __volatile__ ( - "fxsave %0" - : - : "m" (*Buffer) // %0 - ); -} - - -/** - 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 - ) -{ - __asm__ __volatile__ ( - "fxrstor %0" - : - : "m" (*Buffer) // %0 - ); -} - - -/** - 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. - - @return The current value of MM0. - -**/ -UINT64 -EFIAPI -AsmReadMm0 ( - VOID - ) -{ - UINT64 Data; - - __asm__ __volatile__ ( - "push %%eax \n\t" - "push %%eax \n\t" - "movq %%mm0, (%%esp)\n\t" - "pop %%eax \n\t" - "pop %%edx \n\t" - : "=A" (Data) // %0 - ); - - return Data; -} - - -/** - 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. - - @return The current value of MM1. - -**/ -UINT64 -EFIAPI -AsmReadMm1 ( - VOID - ) -{ - UINT64 Data; - - __asm__ __volatile__ ( - "push %%eax \n\t" - "push %%eax \n\t" - "movq %%mm1, (%%esp)\n\t" - "pop %%eax \n\t" - "pop %%edx \n\t" - : "=A" (Data) // %0 - ); - - return Data; -} - - -/** - 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. - - @return The current value of MM2. - -**/ -UINT64 -EFIAPI -AsmReadMm2 ( - VOID - ) -{ - UINT64 Data; - - __asm__ __volatile__ ( - "push %%eax \n\t" - "push %%eax \n\t" - "movq %%mm2, (%%esp)\n\t" - "pop %%eax \n\t" - "pop %%edx \n\t" - : "=A" (Data) // %0 - ); - - return Data; -} - - -/** - 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. - - @return The current value of MM3. - -**/ -UINT64 -EFIAPI -AsmReadMm3 ( - VOID - ) -{ - UINT64 Data; - - __asm__ __volatile__ ( - "push %%eax \n\t" - "push %%eax \n\t" - "movq %%mm3, (%%esp)\n\t" - "pop %%eax \n\t" - "pop %%edx \n\t" - : "=A" (Data) // %0 - ); - - return Data; -} - - -/** - 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. - - @return The current value of MM4. - -**/ -UINT64 -EFIAPI -AsmReadMm4 ( - VOID - ) -{ - UINT64 Data; - - __asm__ __volatile__ ( - "push %%eax \n\t" - "push %%eax \n\t" - "movq %%mm4, (%%esp)\n\t" - "pop %%eax \n\t" - "pop %%edx \n\t" - : "=A" (Data) // %0 - ); - - return Data; -} - - -/** - 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. - - @return The current value of MM5. - -**/ -UINT64 -EFIAPI -AsmReadMm5 ( - VOID - ) -{ - UINT64 Data; - - __asm__ __volatile__ ( - "push %%eax \n\t" - "push %%eax \n\t" - "movq %%mm5, (%%esp)\n\t" - "pop %%eax \n\t" - "pop %%edx \n\t" - : "=A" (Data) // %0 - ); - - return Data; -} - - -/** - 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. - - @return The current value of MM6. - -**/ -UINT64 -EFIAPI -AsmReadMm6 ( - VOID - ) -{ - UINT64 Data; - - __asm__ __volatile__ ( - "push %%eax \n\t" - "push %%eax \n\t" - "movq %%mm6, (%%esp)\n\t" - "pop %%eax \n\t" - "pop %%edx \n\t" - : "=A" (Data) // %0 - ); - - return Data; -} - - -/** - 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. - - @return The current value of MM7. - -**/ -UINT64 -EFIAPI -AsmReadMm7 ( - VOID - ) -{ - UINT64 Data; - - __asm__ __volatile__ ( - "push %%eax \n\t" - "push %%eax \n\t" - "movq %%mm7, (%%esp)\n\t" - "pop %%eax \n\t" - "pop %%edx \n\t" - : "=A" (Data) // %0 - ); - - return Data; -} - - -/** - 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. - - @param Value The 64-bit value to write to MM0. - -**/ -VOID -EFIAPI -AsmWriteMm0 ( - IN UINT64 Value - ) -{ - __asm__ __volatile__ ( - "movq %0, %%mm0" // %0 - : - : "m" (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. - - @param Value The 64-bit value to write to MM1. - -**/ -VOID -EFIAPI -AsmWriteMm1 ( - IN UINT64 Value - ) -{ - __asm__ __volatile__ ( - "movq %0, %%mm1" // %0 - : - : "m" (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. - - @param Value The 64-bit value to write to MM2. - -**/ -VOID -EFIAPI -AsmWriteMm2 ( - IN UINT64 Value - ) -{ - __asm__ __volatile__ ( - "movq %0, %%mm2" // %0 - : - : "m" (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. - - @param Value The 64-bit value to write to MM3. - -**/ -VOID -EFIAPI -AsmWriteMm3 ( - IN UINT64 Value - ) -{ - __asm__ __volatile__ ( - "movq %0, %%mm3" // %0 - : - : "m" (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. - - @param Value The 64-bit value to write to MM4. - -**/ -VOID -EFIAPI -AsmWriteMm4 ( - IN UINT64 Value - ) -{ - __asm__ __volatile__ ( - "movq %0, %%mm4" // %0 - : - : "m" (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. - - @param Value The 64-bit value to write to MM5. - -**/ -VOID -EFIAPI -AsmWriteMm5 ( - IN UINT64 Value - ) -{ - __asm__ __volatile__ ( - "movq %0, %%mm5" // %0 - : - : "m" (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. - - @param Value The 64-bit value to write to MM6. - -**/ -VOID -EFIAPI -AsmWriteMm6 ( - IN UINT64 Value - ) -{ - __asm__ __volatile__ ( - "movq %0, %%mm6" // %0 - : - : "m" (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. - - @param Value The 64-bit value to write to MM7. - -**/ -VOID -EFIAPI -AsmWriteMm7 ( - IN UINT64 Value - ) -{ - __asm__ __volatile__ ( - "movq %0, %%mm7" // %0 - : - : "m" (Value) - ); -} - - -/** - 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. - - @return The current value of TSC - -**/ -UINT64 -EFIAPI -AsmReadTsc ( - VOID - ) -{ - UINT64 Data; - - __asm__ __volatile__ ( - "rdtsc" - : "=A" (Data) - ); - - return Data; -} - - -/** - 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. - - @param Index The 32-bit Performance Counter index to read. - - @return The value of the PMC specified by Index. - -**/ -UINT64 -EFIAPI -AsmReadPmc ( - IN UINT32 Index - ) -{ - UINT64 Data; - - __asm__ __volatile__ ( - "rdpmc" - : "=A" (Data) - : "c" (Index) - ); - - return Data; -} - - - - -/** - Executes a WBINVD instruction. - - Executes a WBINVD instruction. This function is only available on IA-32 and - X64. - -**/ -VOID -EFIAPI -AsmWbinvd ( - VOID - ) -{ - __asm__ __volatile__ ("wbinvd":::"memory"); -} - - -/** - Executes a INVD instruction. - - Executes a INVD instruction. This function is only available on IA-32 and - X64. - -**/ -VOID -EFIAPI -AsmInvd ( - VOID - ) -{ - __asm__ __volatile__ ("invd":::"memory"); - -} - - -/** - 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. - - @param 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. - - @return LinearAddress -**/ -VOID * -EFIAPI -AsmFlushCacheLine ( - IN VOID *LinearAddress - ) -{ - __asm__ __volatile__ ( - "clflush (%0)" - : "+a" (LinearAddress) - : - : "memory" - ); - - return LinearAddress; -} - - +/** @file
+ GCC inline implementation of BaseLib processor specific functions.
+
+ Copyright (c) 2006 - 2007, Intel Corporation<BR>
+ Portions copyright (c) 2008-2009 Apple Inc.<BR>
+ 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.
+
+**/
+
+
+#include "BaseLibInternals.h"
+
+
+
+/**
+ 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.
+
+**/
+VOID
+EFIAPI
+MemoryFence (
+ VOID
+ )
+{
+ // This is a little bit of overkill and it is more about the compiler that it is
+ // actually processor syncronization. This is like the _ReadWriteBarrier
+ // Microsft specific intrinsic
+ __asm__ __volatile__ ("":::"memory");
+}
+
+
+/**
+ Enables CPU interrupts.
+
+ Enables CPU interrupts.
+
+**/
+VOID
+EFIAPI
+EnableInterrupts (
+ VOID
+ )
+{
+ __asm__ __volatile__ ("sti"::: "memory");
+}
+
+
+/**
+ Disables CPU interrupts.
+
+ Disables CPU interrupts.
+
+**/
+VOID
+EFIAPI
+DisableInterrupts (
+ VOID
+ )
+{
+ __asm__ __volatile__ ("cli"::: "memory");
+}
+
+
+
+
+/**
+ 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
+CpuPause (
+ VOID
+ )
+{
+ __asm__ __volatile__ ("pause");
+}
+
+
+/**
+ 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
+CpuBreakpoint (
+ VOID
+ )
+{
+ __asm__ __volatile__ ("int $3");
+}
+
+
+
+/**
+ 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.
+
+ @param Index The 32-bit MSR index to read.
+
+ @return The value of the MSR identified by Index.
+
+**/
+UINT64
+EFIAPI
+AsmReadMsr64 (
+ IN UINT32 Index
+ )
+{
+ UINT64 Data;
+
+ __asm__ __volatile__ (
+ "rdmsr"
+ : "=A" (Data) // %0
+ : "c" (Index) // %1
+ );
+
+ return Data;
+}
+
+/**
+ 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.
+
+ @param Index The 32-bit MSR index to write.
+ @param Value The 64-bit value to write to the MSR.
+
+ @return Value
+
+**/
+UINT64
+EFIAPI
+AsmWriteMsr64 (
+ IN UINT32 Index,
+ IN UINT64 Value
+ )
+{
+ __asm__ __volatile__ (
+ "wrmsr"
+ :
+ : "c" (Index),
+ "A" (Value)
+ );
+
+ return Value;
+}
+
+
+
+/**
+ 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.
+
+ @return EFLAGS on IA-32 or RFLAGS on X64.
+
+**/
+UINTN
+EFIAPI
+AsmReadEflags (
+ VOID
+ )
+{
+ UINTN Eflags;
+
+ __asm__ __volatile__ (
+ "pushfl \n\t"
+ "popl %0 "
+ : "=r" (Eflags)
+ );
+
+ return Eflags;
+}
+
+
+
+/**
+ 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.
+
+ @return The value of the Control Register 0 (CR0).
+
+**/
+UINTN
+EFIAPI
+AsmReadCr0 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%cr0,%0"
+ : "=a" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The value of the Control Register 2 (CR2).
+
+**/
+UINTN
+EFIAPI
+AsmReadCr2 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%cr2, %0"
+ : "=r" (Data)
+ );
+
+ return Data;
+}
+
+/**
+ 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.
+
+ @return The value of the Control Register 3 (CR3).
+
+**/
+UINTN
+EFIAPI
+AsmReadCr3 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%cr3, %0"
+ : "=r" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The value of the Control Register 4 (CR4).
+
+**/
+UINTN
+EFIAPI
+AsmReadCr4 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%cr4, %0"
+ : "=a" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @param Cr0 The value to write to CR0.
+
+ @return The value written to CR0.
+
+**/
+UINTN
+EFIAPI
+AsmWriteCr0 (
+ UINTN Cr0
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%cr0"
+ :
+ : "r" (Cr0)
+ );
+ return Cr0;
+}
+
+
+/**
+ 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.
+
+ @param Cr2 The value to write to CR2.
+
+ @return The value written to CR2.
+
+**/
+UINTN
+EFIAPI
+AsmWriteCr2 (
+ UINTN Cr2
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%cr2"
+ :
+ : "r" (Cr2)
+ );
+ return Cr2;
+}
+
+
+/**
+ 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.
+
+ @param Cr3 The value to write to CR3.
+
+ @return The value written to CR3.
+
+**/
+UINTN
+EFIAPI
+AsmWriteCr3 (
+ UINTN Cr3
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%cr3"
+ :
+ : "r" (Cr3)
+ );
+ return Cr3;
+}
+
+
+/**
+ 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.
+
+ @param Cr4 The value to write to CR4.
+
+ @return The value written to CR4.
+
+**/
+UINTN
+EFIAPI
+AsmWriteCr4 (
+ UINTN Cr4
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%cr4"
+ :
+ : "r" (Cr4)
+ );
+ return Cr4;
+}
+
+
+/**
+ 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.
+
+ @return The value of Debug Register 0 (DR0).
+
+**/
+UINTN
+EFIAPI
+AsmReadDr0 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%dr0, %0"
+ : "=r" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The value of Debug Register 1 (DR1).
+
+**/
+UINTN
+EFIAPI
+AsmReadDr1 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%dr1, %0"
+ : "=r" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The value of Debug Register 2 (DR2).
+
+**/
+UINTN
+EFIAPI
+AsmReadDr2 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%dr2, %0"
+ : "=r" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The value of Debug Register 3 (DR3).
+
+**/
+UINTN
+EFIAPI
+AsmReadDr3 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%dr3, %0"
+ : "=r" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The value of Debug Register 4 (DR4).
+
+**/
+UINTN
+EFIAPI
+AsmReadDr4 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%dr4, %0"
+ : "=r" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The value of Debug Register 5 (DR5).
+
+**/
+UINTN
+EFIAPI
+AsmReadDr5 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%dr5, %0"
+ : "=r" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The value of Debug Register 6 (DR6).
+
+**/
+UINTN
+EFIAPI
+AsmReadDr6 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%dr6, %0"
+ : "=r" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The value of Debug Register 7 (DR7).
+
+**/
+UINTN
+EFIAPI
+AsmReadDr7 (
+ VOID
+ )
+{
+ UINTN Data;
+
+ __asm__ __volatile__ (
+ "movl %%dr7, %0"
+ : "=r" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @param Dr0 The value to write to Dr0.
+
+ @return The value written to Debug Register 0 (DR0).
+
+**/
+UINTN
+EFIAPI
+AsmWriteDr0 (
+ UINTN Dr0
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%dr0"
+ :
+ : "r" (Dr0)
+ );
+ return Dr0;
+}
+
+
+/**
+ 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.
+
+ @param Dr1 The value to write to Dr1.
+
+ @return The value written to Debug Register 1 (DR1).
+
+**/
+UINTN
+EFIAPI
+AsmWriteDr1 (
+ UINTN Dr1
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%dr1"
+ :
+ : "r" (Dr1)
+ );
+ return Dr1;
+}
+
+
+/**
+ 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.
+
+ @param Dr2 The value to write to Dr2.
+
+ @return The value written to Debug Register 2 (DR2).
+
+**/
+UINTN
+EFIAPI
+AsmWriteDr2 (
+ UINTN Dr2
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%dr2"
+ :
+ : "r" (Dr2)
+ );
+ return Dr2;
+}
+
+
+/**
+ 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.
+
+ @param Dr3 The value to write to Dr3.
+
+ @return The value written to Debug Register 3 (DR3).
+
+**/
+UINTN
+EFIAPI
+AsmWriteDr3 (
+ UINTN Dr3
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%dr3"
+ :
+ : "r" (Dr3)
+ );
+ return Dr3;
+}
+
+
+/**
+ 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.
+
+ @param Dr4 The value to write to Dr4.
+
+ @return The value written to Debug Register 4 (DR4).
+
+**/
+UINTN
+EFIAPI
+AsmWriteDr4 (
+ UINTN Dr4
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%dr4"
+ :
+ : "r" (Dr4)
+ );
+ return Dr4;
+}
+
+
+/**
+ 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.
+
+ @param Dr5 The value to write to Dr5.
+
+ @return The value written to Debug Register 5 (DR5).
+
+**/
+UINTN
+EFIAPI
+AsmWriteDr5 (
+ UINTN Dr5
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%dr5"
+ :
+ : "r" (Dr5)
+ );
+ return Dr5;
+}
+
+
+/**
+ 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.
+
+ @param Dr6 The value to write to Dr6.
+
+ @return The value written to Debug Register 6 (DR6).
+
+**/
+UINTN
+EFIAPI
+AsmWriteDr6 (
+ UINTN Dr6
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%dr6"
+ :
+ : "r" (Dr6)
+ );
+ return Dr6;
+}
+
+
+/**
+ 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.
+
+ @param Dr7 The value to write to Dr7.
+
+ @return The value written to Debug Register 7 (DR7).
+
+**/
+UINTN
+EFIAPI
+AsmWriteDr7 (
+ UINTN Dr7
+ )
+{
+ __asm__ __volatile__ (
+ "movl %0, %%dr7"
+ :
+ : "r" (Dr7)
+ );
+ return Dr7;
+}
+
+
+/**
+ 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.
+
+ @return The current value of CS.
+
+**/
+UINT16
+EFIAPI
+AsmReadCs (
+ VOID
+ )
+{
+ UINT16 Data;
+
+ __asm__ __volatile__ (
+ "mov %%cs, %0"
+ :"=a" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of DS.
+
+**/
+UINT16
+EFIAPI
+AsmReadDs (
+ VOID
+ )
+{
+ UINT16 Data;
+
+ __asm__ __volatile__ (
+ "mov %%ds, %0"
+ :"=a" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of ES.
+
+**/
+UINT16
+EFIAPI
+AsmReadEs (
+ VOID
+ )
+{
+ UINT16 Data;
+
+ __asm__ __volatile__ (
+ "mov %%es, %0"
+ :"=a" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of FS.
+
+**/
+UINT16
+EFIAPI
+AsmReadFs (
+ VOID
+ )
+{
+ UINT16 Data;
+
+ __asm__ __volatile__ (
+ "mov %%fs, %0"
+ :"=a" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of GS.
+
+**/
+UINT16
+EFIAPI
+AsmReadGs (
+ VOID
+ )
+{
+ UINT16 Data;
+
+ __asm__ __volatile__ (
+ "mov %%gs, %0"
+ :"=a" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of SS.
+
+**/
+UINT16
+EFIAPI
+AsmReadSs (
+ VOID
+ )
+{
+ UINT16 Data;
+
+ __asm__ __volatile__ (
+ "mov %%ds, %0"
+ :"=a" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of TR.
+
+**/
+UINT16
+EFIAPI
+AsmReadTr (
+ VOID
+ )
+{
+ UINT16 Data;
+
+ __asm__ __volatile__ (
+ "str %0"
+ : "=a" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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
+ )
+{
+ __asm__ __volatile__ (
+ "sgdt %0"
+ : "=m" (*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
+ )
+{
+ __asm__ __volatile__ (
+ "lgdt %0"
+ :
+ : "m" (*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 *Ldtr
+ )
+{
+ __asm__ __volatile__ (
+ "sldt %0"
+ : "=m" (*Ldtr)
+ );
+}
+
+
+/**
+ 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 *Ldtr
+ )
+{
+ __asm__ __volatile__ (
+ "lidt %0"
+ :
+ : "m" (*Ldtr)
+ );
+}
+
+
+/**
+ 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.
+
+ @return The current selector of LDT.
+
+**/
+UINT16
+EFIAPI
+AsmReadLdtr (
+ VOID
+ )
+{
+ UINT16 Data;
+
+ __asm__ __volatile__ (
+ "sldt %0"
+ : "=g" (Data) // %0
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @param Ldtr 16-bit LDTR selector value.
+
+**/
+VOID
+EFIAPI
+AsmWriteLdtr (
+ IN UINT16 Ldtr
+ )
+{
+ __asm__ __volatile__ (
+ "lldtw %0"
+ :
+ : "g" (Ldtr) // %0
+ );
+}
+
+
+/**
+ 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
+ )
+{
+ __asm__ __volatile__ (
+ "fxsave %0"
+ :
+ : "m" (*Buffer) // %0
+ );
+}
+
+
+/**
+ 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
+ )
+{
+ __asm__ __volatile__ (
+ "fxrstor %0"
+ :
+ : "m" (*Buffer) // %0
+ );
+}
+
+
+/**
+ 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.
+
+ @return The current value of MM0.
+
+**/
+UINT64
+EFIAPI
+AsmReadMm0 (
+ VOID
+ )
+{
+ UINT64 Data;
+
+ __asm__ __volatile__ (
+ "push %%eax \n\t"
+ "push %%eax \n\t"
+ "movq %%mm0, (%%esp)\n\t"
+ "pop %%eax \n\t"
+ "pop %%edx \n\t"
+ : "=A" (Data) // %0
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of MM1.
+
+**/
+UINT64
+EFIAPI
+AsmReadMm1 (
+ VOID
+ )
+{
+ UINT64 Data;
+
+ __asm__ __volatile__ (
+ "push %%eax \n\t"
+ "push %%eax \n\t"
+ "movq %%mm1, (%%esp)\n\t"
+ "pop %%eax \n\t"
+ "pop %%edx \n\t"
+ : "=A" (Data) // %0
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of MM2.
+
+**/
+UINT64
+EFIAPI
+AsmReadMm2 (
+ VOID
+ )
+{
+ UINT64 Data;
+
+ __asm__ __volatile__ (
+ "push %%eax \n\t"
+ "push %%eax \n\t"
+ "movq %%mm2, (%%esp)\n\t"
+ "pop %%eax \n\t"
+ "pop %%edx \n\t"
+ : "=A" (Data) // %0
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of MM3.
+
+**/
+UINT64
+EFIAPI
+AsmReadMm3 (
+ VOID
+ )
+{
+ UINT64 Data;
+
+ __asm__ __volatile__ (
+ "push %%eax \n\t"
+ "push %%eax \n\t"
+ "movq %%mm3, (%%esp)\n\t"
+ "pop %%eax \n\t"
+ "pop %%edx \n\t"
+ : "=A" (Data) // %0
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of MM4.
+
+**/
+UINT64
+EFIAPI
+AsmReadMm4 (
+ VOID
+ )
+{
+ UINT64 Data;
+
+ __asm__ __volatile__ (
+ "push %%eax \n\t"
+ "push %%eax \n\t"
+ "movq %%mm4, (%%esp)\n\t"
+ "pop %%eax \n\t"
+ "pop %%edx \n\t"
+ : "=A" (Data) // %0
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of MM5.
+
+**/
+UINT64
+EFIAPI
+AsmReadMm5 (
+ VOID
+ )
+{
+ UINT64 Data;
+
+ __asm__ __volatile__ (
+ "push %%eax \n\t"
+ "push %%eax \n\t"
+ "movq %%mm5, (%%esp)\n\t"
+ "pop %%eax \n\t"
+ "pop %%edx \n\t"
+ : "=A" (Data) // %0
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of MM6.
+
+**/
+UINT64
+EFIAPI
+AsmReadMm6 (
+ VOID
+ )
+{
+ UINT64 Data;
+
+ __asm__ __volatile__ (
+ "push %%eax \n\t"
+ "push %%eax \n\t"
+ "movq %%mm6, (%%esp)\n\t"
+ "pop %%eax \n\t"
+ "pop %%edx \n\t"
+ : "=A" (Data) // %0
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @return The current value of MM7.
+
+**/
+UINT64
+EFIAPI
+AsmReadMm7 (
+ VOID
+ )
+{
+ UINT64 Data;
+
+ __asm__ __volatile__ (
+ "push %%eax \n\t"
+ "push %%eax \n\t"
+ "movq %%mm7, (%%esp)\n\t"
+ "pop %%eax \n\t"
+ "pop %%edx \n\t"
+ : "=A" (Data) // %0
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @param Value The 64-bit value to write to MM0.
+
+**/
+VOID
+EFIAPI
+AsmWriteMm0 (
+ IN UINT64 Value
+ )
+{
+ __asm__ __volatile__ (
+ "movq %0, %%mm0" // %0
+ :
+ : "m" (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.
+
+ @param Value The 64-bit value to write to MM1.
+
+**/
+VOID
+EFIAPI
+AsmWriteMm1 (
+ IN UINT64 Value
+ )
+{
+ __asm__ __volatile__ (
+ "movq %0, %%mm1" // %0
+ :
+ : "m" (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.
+
+ @param Value The 64-bit value to write to MM2.
+
+**/
+VOID
+EFIAPI
+AsmWriteMm2 (
+ IN UINT64 Value
+ )
+{
+ __asm__ __volatile__ (
+ "movq %0, %%mm2" // %0
+ :
+ : "m" (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.
+
+ @param Value The 64-bit value to write to MM3.
+
+**/
+VOID
+EFIAPI
+AsmWriteMm3 (
+ IN UINT64 Value
+ )
+{
+ __asm__ __volatile__ (
+ "movq %0, %%mm3" // %0
+ :
+ : "m" (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.
+
+ @param Value The 64-bit value to write to MM4.
+
+**/
+VOID
+EFIAPI
+AsmWriteMm4 (
+ IN UINT64 Value
+ )
+{
+ __asm__ __volatile__ (
+ "movq %0, %%mm4" // %0
+ :
+ : "m" (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.
+
+ @param Value The 64-bit value to write to MM5.
+
+**/
+VOID
+EFIAPI
+AsmWriteMm5 (
+ IN UINT64 Value
+ )
+{
+ __asm__ __volatile__ (
+ "movq %0, %%mm5" // %0
+ :
+ : "m" (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.
+
+ @param Value The 64-bit value to write to MM6.
+
+**/
+VOID
+EFIAPI
+AsmWriteMm6 (
+ IN UINT64 Value
+ )
+{
+ __asm__ __volatile__ (
+ "movq %0, %%mm6" // %0
+ :
+ : "m" (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.
+
+ @param Value The 64-bit value to write to MM7.
+
+**/
+VOID
+EFIAPI
+AsmWriteMm7 (
+ IN UINT64 Value
+ )
+{
+ __asm__ __volatile__ (
+ "movq %0, %%mm7" // %0
+ :
+ : "m" (Value)
+ );
+}
+
+
+/**
+ 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.
+
+ @return The current value of TSC
+
+**/
+UINT64
+EFIAPI
+AsmReadTsc (
+ VOID
+ )
+{
+ UINT64 Data;
+
+ __asm__ __volatile__ (
+ "rdtsc"
+ : "=A" (Data)
+ );
+
+ return Data;
+}
+
+
+/**
+ 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.
+
+ @param Index The 32-bit Performance Counter index to read.
+
+ @return The value of the PMC specified by Index.
+
+**/
+UINT64
+EFIAPI
+AsmReadPmc (
+ IN UINT32 Index
+ )
+{
+ UINT64 Data;
+
+ __asm__ __volatile__ (
+ "rdpmc"
+ : "=A" (Data)
+ : "c" (Index)
+ );
+
+ return Data;
+}
+
+
+
+
+/**
+ Executes a WBINVD instruction.
+
+ Executes a WBINVD instruction. This function is only available on IA-32 and
+ X64.
+
+**/
+VOID
+EFIAPI
+AsmWbinvd (
+ VOID
+ )
+{
+ __asm__ __volatile__ ("wbinvd":::"memory");
+}
+
+
+/**
+ Executes a INVD instruction.
+
+ Executes a INVD instruction. This function is only available on IA-32 and
+ X64.
+
+**/
+VOID
+EFIAPI
+AsmInvd (
+ VOID
+ )
+{
+ __asm__ __volatile__ ("invd":::"memory");
+
+}
+
+
+/**
+ 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.
+
+ @param 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.
+
+ @return LinearAddress
+**/
+VOID *
+EFIAPI
+AsmFlushCacheLine (
+ IN VOID *LinearAddress
+ )
+{
+ __asm__ __volatile__ (
+ "clflush (%0)"
+ : "+a" (LinearAddress)
+ :
+ : "memory"
+ );
+
+ return LinearAddress;
+}
+
+
|