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#ifndef CYGONCE_HAL_CLOCK_H
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#define CYGONCE_HAL_CLOCK_H
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//=============================================================================
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//
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// hal_clock.h
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//
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// HAL clock 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 Free Software Foundation, 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
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// version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT
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// ANY 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
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// along with eCos; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// As a special exception, if other files instantiate templates or use
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// macros or inline functions from this file, or you compile this file
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// and link it with other works to produce a work based on this file,
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// this file does not by itself cause the resulting work to be covered by
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// the GNU General Public License. However the source code for this file
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// must still be made available in accordance with section (3) of the GNU
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// General Public License v2.
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//
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// This exception does not invalidate any other reasons why a work based
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// on this file might be covered by the GNU General Public 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, gthomas, hmt
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// Contributors: nickg, gthomas, hmt
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// Date: 1999-01-28
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// Purpose: Define clock support
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// Description: The macros defined here provide the HAL APIs for handling
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// the clock.
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//
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// Usage:
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// #include <cyg/hal/hal_intr.h> // which includes this file
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// ...
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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/hal/hal_io.h>
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#include <cyg/hal/hal_hwio.h> // HAL_SPARC_86940_READ/WRITE
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//-----------------------------------------------------------------------------
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// Clock control
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// The vector used by the Real time clock is defined in hal_xpic.h
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extern cyg_int32 cyg_hal_sparclite_clock_period;
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//-----------------------------------------------------------------------------
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#define HAL_SPARC_86940_REG_TIMER1_PRESCALER ( 0x14 * 4 )
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#define HAL_SPARC_86940_REG_TIMER1_CONTROL ( 0x15 * 4 )
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#define HAL_SPARC_86940_REG_TIMER1_RELOAD ( 0x16 * 4 )
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#define HAL_SPARC_86940_REG_TIMER1_COUNT ( 0x17 * 4 )
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#define HAL_SPARC_86940_TIMER1_PRESCALER_WRITE( v ) \
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HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_PRESCALER, v )
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#define HAL_SPARC_86940_TIMER1_PRESCALER_READ( r ) \
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HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_PRESCALER, r )
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#define HAL_SPARC_86940_TIMER1_CONTROL_WRITE( v ) \
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HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_CONTROL, v )
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#define HAL_SPARC_86940_TIMER1_CONTROL_READ( r ) \
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HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_CONTROL, r )
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#define HAL_SPARC_86940_TIMER1_RELOAD_WRITE( v ) \
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HAL_SPARC_86940_WRITE( HAL_SPARC_86940_REG_TIMER1_RELOAD, v )
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#define HAL_SPARC_86940_TIMER1_RELOAD_READ( r ) \
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HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_RELOAD, r )
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#define HAL_SPARC_86940_TIMER1_COUNT_READ( r ) \
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HAL_SPARC_86940_READ( HAL_SPARC_86940_REG_TIMER1_COUNT, r )
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//-----------------------------------------------------------------------------
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// Initialize the clock to 1MHz whatever the system clock speed. This
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// requires calculation...
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externC void hal_clock_initialize( cyg_uint32 p );
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#define HAL_CLOCK_INITIALIZE( _period_ ) hal_clock_initialize( _period_ )
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// This is the easiest way to clear the interrupt.
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#define HAL_CLOCK_RESET( _vector_, _period_ ) CYG_MACRO_START \
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cyg_uint32 _scratch_; \
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HAL_SPARC_86940_TIMER1_COUNT_READ( _scratch_ ); \
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CYG_MACRO_END
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#define HAL_CLOCK_READ( _pvalue_ ) CYG_MACRO_START \
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cyg_uint32 _read_; \
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HAL_SPARC_86940_TIMER1_COUNT_READ( _read_ ); \
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*((cyg_uint32 *)(_pvalue_)) = cyg_hal_sparclite_clock_period - _read_; \
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CYG_MACRO_END
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#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK_LATENCY
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#define HAL_CLOCK_LATENCY( _pvalue_ ) HAL_CLOCK_READ( _pvalue_ )
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#endif
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//-----------------------------------------------------------------------------
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#endif // ifndef CYGONCE_HAL_CLOCK_H
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// End of hal_clock.h
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