mirror of https://github.com/acidanthera/audk.git
112 lines
3.3 KiB
NASM
112 lines
3.3 KiB
NASM
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title CpuIoAccess.asm
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;------------------------------------------------------------------------------
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;*
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;* Copyright (c) 2005 - 2007, Intel Corporation
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;* All rights reserved. This program and the accompanying materials
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;* are licensed and made available under the terms and conditions of the BSD License
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;* which accompanies this distribution. The full text of the license may be found at
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;* http://opensource.org/licenses/bsd-license.php
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;*
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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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;* Module Name:
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;* CpuIoAccess.asm
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;*
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;* Abstract:
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;* Supports x64 CPU IO operation
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;*
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;------------------------------------------------------------------------------
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;
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;
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;
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; Abstract:
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;
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;
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;------------------------------------------------------------------------------
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.CODE
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;------------------------------------------------------------------------------
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; UINT8
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; CpuIoRead8 (
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; UINT16 Port // rcx
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; )
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;------------------------------------------------------------------------------
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CpuIoRead8 PROC PUBLIC
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xor eax, eax
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mov dx, cx
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in al, dx
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ret
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CpuIoRead8 ENDP
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;------------------------------------------------------------------------------
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; VOID
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; CpuIoWrite8 (
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; UINT16 Port, // rcx
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; UINT32 Data // rdx
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; )
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;------------------------------------------------------------------------------
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CpuIoWrite8 PROC PUBLIC
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mov eax, edx
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mov dx, cx
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out dx, al
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ret
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CpuIoWrite8 ENDP
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;------------------------------------------------------------------------------
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; UINT16
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; CpuIoRead16 (
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; UINT16 Port // rcx
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; )
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;------------------------------------------------------------------------------
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CpuIoRead16 PROC PUBLIC
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xor eax, eax
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mov dx, cx
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in ax, dx
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ret
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CpuIoRead16 ENDP
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;------------------------------------------------------------------------------
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; VOID
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; CpuIoWrite16 (
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; UINT16 Port, // rcx
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; UINT32 Data // rdx
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; )
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;------------------------------------------------------------------------------
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CpuIoWrite16 PROC PUBLIC
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mov eax, edx
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mov dx, cx
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out dx, ax
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ret
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CpuIoWrite16 ENDP
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;------------------------------------------------------------------------------
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; UINT32
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; CpuIoRead32 (
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; UINT16 Port // rcx
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; )
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;------------------------------------------------------------------------------
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CpuIoRead32 PROC PUBLIC
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mov dx, cx
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in eax, dx
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ret
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CpuIoRead32 ENDP
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;------------------------------------------------------------------------------
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; VOID
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; CpuIoWrite32 (
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; UINT16 Port, // rcx
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; UINT32 Data // rdx
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; )
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;------------------------------------------------------------------------------
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CpuIoWrite32 PROC PUBLIC
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mov eax, edx
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mov dx, cx
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out dx, eax
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ret
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CpuIoWrite32 ENDP
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END
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