PcAtChipsetPkg/PciHostBridgeDxe: Improve KVM FIFO I/O read/write performance
KVM can substantially boost the speed of the rep insb/insw/insl and rep outsb/outsw/outsl instructions by transferring up to a page of data per VM trap. This change adds assembly handling of the PCI Host Bridge I/O FIFO Reads and Writes. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com> git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13424 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jljusten
133
PcAtChipsetPkg/PciHostBridgeDxe/Ia32/IoFifo.S
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133
PcAtChipsetPkg/PciHostBridgeDxe/Ia32/IoFifo.S
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#------------------------------------------------------------------------------
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#
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# Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
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# 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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#
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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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#
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoReadFifo8 (
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# IN UINTN Port,
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# IN UINTN Count,
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# IN VOID *Buffer
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoReadFifo8)
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ASM_PFX(IoReadFifo8):
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push %edi
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cld
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movw 8(%esp), %dx
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mov 12(%esp), %ecx
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mov 16(%esp), %edi
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rep insb
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pop %edi
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ret
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoReadFifo16 (
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# IN UINTN Port,
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# IN UINTN Count,
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# IN VOID *Buffer
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoReadFifo16)
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ASM_PFX(IoReadFifo16):
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push %edi
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cld
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movw 8(%esp), %dx
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mov 12(%esp), %ecx
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mov 16(%esp), %edi
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rep insw
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pop %edi
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ret
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoReadFifo32 (
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# IN UINTN Port,
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# IN UINTN Count,
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# IN VOID *Buffer
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoReadFifo32)
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ASM_PFX(IoReadFifo32):
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push %edi
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cld
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movw 8(%esp), %dx
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mov 12(%esp), %ecx
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mov 16(%esp), %edi
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rep insl
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pop %edi
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ret
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoWriteFifo8 (
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# IN UINTN Port,
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# IN UINTN Count,
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# IN VOID *Buffer
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoWriteFifo8)
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ASM_PFX(IoWriteFifo8):
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push %esi
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cld
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movw 8(%esp), %dx
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mov 12(%esp), %ecx
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mov 16(%esp), %esi
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rep outsb
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pop %esi
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ret
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoWriteFifo16 (
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# IN UINTN Port,
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# IN UINTN Count,
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# IN VOID *Buffer
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoWriteFifo16)
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ASM_PFX(IoWriteFifo16):
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push %esi
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cld
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movw 8(%esp), %dx
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mov 12(%esp), %ecx
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mov 16(%esp), %esi
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rep outsw
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pop %esi
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ret
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoWriteFifo32 (
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# IN UINTN Port,
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# IN UINTN Count,
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# IN VOID *Buffer
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoWriteFifo32)
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ASM_PFX(IoWriteFifo32):
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push %esi
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cld
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movw 8(%esp), %dx
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mov 12(%esp), %ecx
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mov 16(%esp), %esi
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rep outsl
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pop %esi
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ret
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139
PcAtChipsetPkg/PciHostBridgeDxe/Ia32/IoFifo.asm
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139
PcAtChipsetPkg/PciHostBridgeDxe/Ia32/IoFifo.asm
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@@ -0,0 +1,139 @@
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;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
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; 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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;
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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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;
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;------------------------------------------------------------------------------
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.586P
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.model flat,C
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.code
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoReadFifo8 (
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; IN UINTN Port,
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; IN UINTN Size,
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; IN VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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IoReadFifo8 PROC
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push edi
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cld
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov edi, [esp + 16]
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rep insb
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pop edi
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ret
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IoReadFifo8 ENDP
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoReadFifo16 (
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; IN UINTN Port,
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; IN UINTN Size,
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; IN VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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IoReadFifo16 PROC
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push edi
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cld
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov edi, [esp + 16]
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rep insw
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pop edi
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ret
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IoReadFifo16 ENDP
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoReadFifo32 (
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; IN UINTN Port,
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; IN UINTN Size,
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; IN VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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IoReadFifo32 PROC
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push edi
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cld
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov edi, [esp + 16]
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rep insd
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pop edi
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ret
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IoReadFifo32 ENDP
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoWriteFifo8 (
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; IN UINTN Port,
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; IN UINTN Size,
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; IN VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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IoWriteFifo8 PROC
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push esi
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cld
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov esi, [esp + 16]
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rep outsb
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pop esi
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ret
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IoWriteFifo8 ENDP
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoWriteFifo16 (
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; IN UINTN Port,
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; IN UINTN Size,
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; IN VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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IoWriteFifo16 PROC
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push esi
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cld
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov esi, [esp + 16]
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rep outsw
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pop esi
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ret
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IoWriteFifo16 ENDP
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; IoWriteFifo32 (
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; IN UINTN Port,
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; IN UINTN Size,
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; IN VOID *Buffer
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; );
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;------------------------------------------------------------------------------
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IoWriteFifo32 PROC
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push esi
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cld
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mov dx, [esp + 8]
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mov ecx, [esp + 12]
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mov esi, [esp + 16]
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rep outsd
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pop esi
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ret
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IoWriteFifo32 ENDP
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END
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