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#ifndef CYGONCE_HAL_CLOCK_H
#define CYGONCE_HAL_CLOCK_H
 
//=============================================================================
//
//      hal_clock.h
//
//      HAL clock support
//
//=============================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####                                            
// -------------------------------------------                              
// This file is part of eCos, the Embedded Configurable Operating System.   
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, 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     
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// version.                                                                 
//
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or    
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    
// for more details.                                                        
//
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// along with eCos; if not, write to the Free Software Foundation, Inc.,    
// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 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 v2.                                               
//
// This exception does not invalidate any other reasons why a work based    
// on this file might be covered by the GNU General Public License.         
// -------------------------------------------                              
// ####ECOSGPLCOPYRIGHTEND####                                              
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   nickg, gthomas, hmt
// Contributors:        nickg, gthomas, hmt
// Date:        1999-01-28
// Purpose:     Define clock support
// Description: The macros defined here provide the HAL APIs for handling
//              the clock.
//              
// Usage:
//              #include <cyg/hal/hal_intr.h> // which includes this file
//              ...
//              
//
//####DESCRIPTIONEND####
//
//=============================================================================
 
// #include <cyg/hal/hal_io.h>
 
#include <cyg/hal/hal_hwio.h> // HAL_SPARC_86940_READ/WRITE
 
//-----------------------------------------------------------------------------
// Clock control
 
 
// The vector used by the Real time clock is defined in hal_xpic.h
 
extern cyg_int32 cyg_hal_sparclite_clock_period;
 
//-----------------------------------------------------------------------------
 
#define HAL_SPARC_86940_REG_TIMER1_PRESCALER ( 0x14 * 4 )
#define HAL_SPARC_86940_REG_TIMER1_CONTROL   ( 0x15 * 4 )
#define HAL_SPARC_86940_REG_TIMER1_RELOAD    ( 0x16 * 4 )
#define HAL_SPARC_86940_REG_TIMER1_COUNT     ( 0x17 * 4 )
 
 
 
#define HAL_SPARC_86940_TIMER1_PRESCALER_WRITE( v ) \
            HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_PRESCALER, v )
 
#define HAL_SPARC_86940_TIMER1_PRESCALER_READ( r ) \
            HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_PRESCALER, r )
 
#define HAL_SPARC_86940_TIMER1_CONTROL_WRITE( v ) \
            HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_CONTROL, v )
 
#define HAL_SPARC_86940_TIMER1_CONTROL_READ( r ) \
            HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_CONTROL, r )
 
#define HAL_SPARC_86940_TIMER1_RELOAD_WRITE( v ) \
            HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_RELOAD, v )
 
#define HAL_SPARC_86940_TIMER1_RELOAD_READ( r ) \
            HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_RELOAD, r )
 
#define HAL_SPARC_86940_TIMER1_COUNT_READ( r ) \
            HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_COUNT, r )
 
//-----------------------------------------------------------------------------
 
// Initialize the clock to 1MHz whatever the system clock speed.  This
// requires calculation...
 
externC void hal_clock_initialize( cyg_uint32 p );
#define HAL_CLOCK_INITIALIZE( _period_ ) hal_clock_initialize( _period_ )
 
// This is the easiest way to clear the interrupt.
#define HAL_CLOCK_RESET( _vector_, _period_ ) CYG_MACRO_START            \
  cyg_uint32 _scratch_;                                                  \
  HAL_SPARC_86940_TIMER1_COUNT_READ( _scratch_ );                        \
CYG_MACRO_END
 
#define HAL_CLOCK_READ( _pvalue_ ) CYG_MACRO_START                       \
  cyg_uint32 _read_;                                                     \
  HAL_SPARC_86940_TIMER1_COUNT_READ( _read_ );                           \
  *((cyg_uint32 *)(_pvalue_)) = cyg_hal_sparclite_clock_period - _read_; \
CYG_MACRO_END
 
#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK_LATENCY
#define HAL_CLOCK_LATENCY( _pvalue_ )         HAL_CLOCK_READ( _pvalue_ )
#endif
 
//-----------------------------------------------------------------------------
 
#endif // ifndef CYGONCE_HAL_CLOCK_H
// End of hal_clock.h