📄 hal_io.h
字号:
#ifndef CYGONCE_HAL_HAL_IO_H
#define CYGONCE_HAL_HAL_IO_H
//=============================================================================
//
// hal_io.h
//
// HAL device IO register support.
//
//=============================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): nickg
// Contributors: Fabrice Gautier
// Date: 1998-02-17
// Purpose: Define IO register support
// Description: The macros defined here provide the HAL APIs for handling
// device IO control registers.
//
// Usage:
// #include <cyg/hal/hal_io.h>
// ...
//
//####DESCRIPTIONEND####
//
//=============================================================================
#include <cyg/infra/cyg_type.h>
#include <cyg/hal/plf_io.h>
//-----------------------------------------------------------------------------
// IO Register address.
// This type is for recording the address of an IO register.
typedef volatile CYG_ADDRWORD HAL_IO_REGISTER;
//-----------------------------------------------------------------------------
// BYTE Register access.
// Individual and vectorized access to 8 bit registers.
#define HAL_READ_UINT8( _register_, _value_ ) \
CYG_MACRO_START \
{ \
asm volatile ( "xor %%eax,%%eax ;" \
"inb %%dx, %%al" \
: "=a" (_value_) \
: "d"(_register_) \
); \
} \
CYG_MACRO_END
#define HAL_WRITE_UINT8( _register_, _value_ ) \
CYG_MACRO_START \
{ \
asm volatile ( "outb %%al,%%dx" \
: \
: "a" (_value_), "d"(_register_) \
); \
} \
CYG_MACRO_END
#define HAL_READ_UINT8_VECTOR( _register_, _buf_, _count_, _step_ ) \
CYG_MACRO_START \
! Not supported MACRO ! \
CYG_MACRO_END
#define HAL_WRITE_UINT8_VECTOR( _register_, _buf_, _count_, _step_ ) \
CYG_MACRO_START \
! Not supported MACRO ! \
CYG_MACRO_END
#define HAL_READ_UINT8_STRING( _register_, _buf_, _count_) \
CYG_MACRO_START \
asm volatile ( "insb" \
: \
: "c" (_count_), "d"(_register_), "D"(_buf_) \
); \
CYG_MACRO_END
#define HAL_WRITE_UINT8_STRING( _register_, _buf_, _count_) \
CYG_MACRO_START \
asm volatile ( "outsb" \
: \
: "c" (_count_), "d"(_register_), "S"(_buf_) \
); \
CYG_MACRO_END
//-----------------------------------------------------------------------------
// 16 bit access.
// Individual and vectorized access to 16 bit registers.
#define HAL_READ_UINT16( _register_, _value_ ) \
CYG_MACRO_START \
{ \
asm volatile ( "xor %%eax,%%eax ;" \
"inw %%dx, %%ax" \
: "=a" (_value_) \
: "d"(_register_) \
); \
} \
CYG_MACRO_END
#define HAL_WRITE_UINT16( _register_, _value_ ) \
CYG_MACRO_START \
{ \
asm volatile ( "outw %%ax,%%dx" \
: \
: "a" (_value_), "d"(_register_) \
); \
} \
CYG_MACRO_END
#define HAL_READ_UINT16_VECTOR( _register_, _buf_, _count_, _step_ ) \
CYG_MACRO_START \
! Not supported MACRO ! \
CYG_MACRO_END
#define HAL_WRITE_UINT16_VECTOR( _register_, _buf_, _count_, _step_ ) \
CYG_MACRO_START \
! Not supported MACRO ! \
CYG_MACRO_END
#define HAL_READ_UINT16_STRING( _register_, _buf_, _count_) \
CYG_MACRO_START \
asm volatile ( "insw" \
: \
: "c" (_count_), "d"(_register_), "D"(_buf_) \
); \
CYG_MACRO_END
#define HAL_WRITE_UINT16_STRING( _register_, _buf_, _count_) \
CYG_MACRO_START \
asm volatile ( "outsw" \
: \
: "c" (_count_), "d"(_register_), "S"(_buf_) \
); \
CYG_MACRO_END
//-----------------------------------------------------------------------------
// 32 bit access.
// Individual and vectorized access to 32 bit registers.
#define HAL_READ_UINT32( _register_, _value_ ) \
CYG_MACRO_START \
{ \
asm volatile ( "inl %%dx, %%eax" \
: "=a" (_value_) \
: "d"(_register_) \
); \
} \
CYG_MACRO_END
#define HAL_WRITE_UINT32( _register_, _value_ ) \
CYG_MACRO_START \
{ \
asm volatile ( "outl %%eax,%%dx" \
: \
: "a" (_value_), "d"(_register_) \
); \
} \
CYG_MACRO_END
#define HAL_READ_UINT32_VECTOR( _register_, _buf_, _count_, _step_ ) \
CYG_MACRO_START \
! Not supported MACRO ! \
CYG_MACRO_END
#define HAL_WRITE_UINT32_VECTOR( _register_, _buf_, _count_, _step_ ) \
CYG_MACRO_START \
! Not supported MACRO ! \
CYG_MACRO_END
#define HAL_READ_UINT32_STRING( _register_, _buf_, _count_) \
CYG_MACRO_START \
asm volatile ( "insl" \
: \
: "c" (_count_), "d"(_register_), "D"(_buf_) \
); \
CYG_MACRO_END
#define HAL_WRITE_UINT32_STRING( _register_, _buf_, _count_) \
CYG_MACRO_START \
asm volatile ( "outsl" \
: \
: "c" (_count_), "d"(_register_), "S"(_buf_) \
); \
CYG_MACRO_END
//-----------------------------------------------------------------------------
// Macros for acessing shared memory structures
#define HAL_READMEM_UINT8( _reg_, _val_ ) ((_val_) = *((volatile CYG_BYTE *)(_reg_)))
#define HAL_WRITEMEM_UINT8( _reg_, _val_ ) (*((volatile CYG_BYTE *)(_reg_)) = (_val_))
#define HAL_READMEM_UINT16( _reg_, _val_ ) ((_val_) = *((volatile CYG_WORD16 *)(_reg_)))
#define HAL_WRITEMEM_UINT16( _reg_, _val_ ) (*((volatile CYG_WORD16 *)(_reg_)) = (_val_))
#define HAL_READMEM_UINT32( _reg_, _val_ ) ((_val_) = *((volatile CYG_WORD32 *)(_reg_)))
#define HAL_WRITEMEM_UINT32( _reg_, _val_ ) (*((volatile CYG_WORD32 *)(_reg_)) = (_val_))
//-----------------------------------------------------------------------------
#endif // ifndef CYGONCE_HAL_HAL_IO_H
// End of hal_io.h
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -