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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 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

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//

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// 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

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// 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

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//

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// -------------------------------------------

//####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>

//-----------------------------------------------------------------------------

// Clock control

// in erc32 simulator:

//  4 = UART A

//  5 = UART B

//  7 = UART error

// 12 = GPT (general purpose timer)

// 13 = TI1 (realtime clock)

// 15 = watchdog

// in erc32 simulator:

// The vector used by the Real time clock is defined in hal_xpic.h

// We could place conditional code here to choose one clock or the other

// depending on the selected interrupt vector... but pro tem: (pun intended)

#define SPARC_LEON_TIMER_SCALE (24)

/* These must be accessed word-wide to work! */

#define SPARC_LEON_REG              (0x80000000)

#define SPARC_LEON_TI1_COUNTER    (SPARC_LEON_REG + 0x40)

#define SPARC_LEON_TI1_CRELOAD    (SPARC_LEON_REG + 0x44)

#define SPARC_LEON_SCALER     (SPARC_LEON_REG + 0x60)

#define SPARC_LEON_SRELOAD    (SPARC_LEON_REG + 0x64)

/* LEON timer control register bits */

#define SPARC_LEON_TI1_EN  1      /* System Enable */     

#define SPARC_LEON_TI1_RL  2      /* Continuous Running */

#define SPARC_LEON_TI1_LD  4      /* Counter Load */      

#define SPARC_LEON_TI1_CONTROL    (SPARC_LEON_REG + 0x48)

externC cyg_int32 cyg_hal_sparc_clock_period;

#define HAL_CLOCK_INITIALIZE( _period_ ) CYG_MACRO_START              \

  cyg_hal_sparc_clock_period = (_period_);                        \

  HAL_WRITE_UINT32( SPARC_LEON_TI1_CRELOAD, (_period_) );              \

  HAL_WRITE_UINT32( SPARC_LEON_TI1_COUNTER, (_period_) );              \

  HAL_WRITE_UINT32( SPARC_LEON_TI1_CONTROL,                            \

                           (SPARC_LEON_TI1_EN |                     \

                            SPARC_LEON_TI1_RL |                     \

                            SPARC_LEON_TI1_LD) );                   \

CYG_MACRO_END

#define HAL_CLOCK_RESET( _vector_, _period_ ) /* nowt, it is freerunning */

#define HAL_CLOCK_READ( _pvalue_ ) CYG_MACRO_START                    \

   cyg_uint32 _read_;                                                 \

   HAL_READ_UINT32( SPARC_LEON_TI1_COUNTER, _read_ );                  \

   *((cyg_uint32 *)(_pvalue_)) =                                      \

                 (cyg_hal_sparc_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