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