1fd376d979
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
126 lines
4.1 KiB
NASM
126 lines
4.1 KiB
NASM
;------------------------------------------------------------------------------
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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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.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, // rcx
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; IN UINTN Size, // rdx
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; IN VOID *Buffer // r8
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; );
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;------------------------------------------------------------------------------
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IoReadFifo8 PROC
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cld
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xchg rcx, rdx
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xchg rdi, r8 ; rdi: buffer address; r8: save rdi
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rep insb
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mov rdi, r8 ; restore rdi
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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, // rcx
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; IN UINTN Size, // rdx
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; IN VOID *Buffer // r8
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; );
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;------------------------------------------------------------------------------
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IoReadFifo16 PROC
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cld
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xchg rcx, rdx
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xchg rdi, r8 ; rdi: buffer address; r8: save rdi
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rep insw
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mov rdi, r8 ; restore rdi
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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, // rcx
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; IN UINTN Size, // rdx
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; IN VOID *Buffer // r8
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; );
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;------------------------------------------------------------------------------
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IoReadFifo32 PROC
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cld
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xchg rcx, rdx
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xchg rdi, r8 ; rdi: buffer address; r8: save rdi
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rep insd
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mov rdi, r8 ; restore rdi
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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, // rcx
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; IN UINTN Size, // rdx
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; IN VOID *Buffer // r8
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; );
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;------------------------------------------------------------------------------
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IoWriteFifo8 PROC
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cld
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xchg rcx, rdx
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xchg rsi, r8 ; rsi: buffer address; r8: save rsi
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rep outsb
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mov rsi, r8 ; restore rsi
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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, // rcx
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; IN UINTN Size, // rdx
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; IN VOID *Buffer // r8
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; );
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;------------------------------------------------------------------------------
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IoWriteFifo16 PROC
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cld
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xchg rcx, rdx
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xchg rsi, r8 ; rsi: buffer address; r8: save rsi
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rep outsw
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mov rsi, r8 ; restore rsi
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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, // rcx
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; IN UINTN Size, // rdx
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; IN VOID *Buffer // r8
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; );
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;------------------------------------------------------------------------------
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IoWriteFifo32 PROC
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cld
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xchg rcx, rdx
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xchg rsi, r8 ; rsi: buffer address; r8: save rsi
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rep outsd
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mov rsi, r8 ; restore rsi
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ret
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IoWriteFifo32 ENDP
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END
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