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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
// 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.,
// 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>
//-----------------------------------------------------------------------------
// Clock control
// in erc32 simulator:
// 4 = UART A
// 5 = UART B
// 7 = UART error
// 12 = GPT (general purpose timer)
// 13 = RTC (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)
/* These must be accessed word-wide to work! */
#define SPARC_MEC_RTC (0x01f80080)
#define SPARC_MEC_RTC_COUNTER (SPARC_MEC_RTC + 0)
#define SPARC_MEC_RTC_SCALER (SPARC_MEC_RTC + 4)
#define SPARC_MEC_GPT_COUNTER (SPARC_MEC_RTC + 8)
#define SPARC_MEC_GPT_SCALER (SPARC_MEC_RTC + 0x0c)
/* MEC timer control register bits */
#define SPARC_MEC_TCR_GACR 1 /* Continuous Running */
#define SPARC_MEC_TCR_GACL 2 /* Counter Load */
#define SPARC_MEC_TCR_GASE 4 /* System Enable */
#define SPARC_MEC_TCR_GASL 8 /* not used */
#define SPARC_MEC_TCR_TCRCR 0x100 /* Continuous Running */
#define SPARC_MEC_TCR_TCRCL 0x200 /* Counter Load */
#define SPARC_MEC_TCR_TCRSE 0x400 /* System Enable */
#define SPARC_MEC_TCR_TCRSL 0x800 /* not used */
#define SPARC_MEC_RTC_CONTROL (SPARC_MEC_RTC + 0x18)
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_MEC_RTC_COUNTER, (_period_) ); \
HAL_WRITE_UINT32( SPARC_MEC_RTC_CONTROL, \
(SPARC_MEC_TCR_TCRCR | \
SPARC_MEC_TCR_TCRCL | \
SPARC_MEC_TCR_TCRSE) ); \
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_MEC_RTC_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
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