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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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//-----------------------------------------------------------------------------
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// Clock control
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// in erc32 simulator:
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// 4 = UART A
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// 5 = UART B
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// 7 = UART error
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// 12 = GPT (general purpose timer)
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// 13 = TI1 (realtime clock)
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// 15 = watchdog
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// in erc32 simulator:
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// The vector used by the Real time clock is defined in hal_xpic.h
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// We could place conditional code here to choose one clock or the other
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// depending on the selected interrupt vector... but pro tem: (pun intended)
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#define SPARC_LEON_TIMER_SCALE (24)
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/* These must be accessed word-wide to work! */
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#define SPARC_LEON_REG (0x80000000)
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#define SPARC_LEON_TI1_COUNTER (SPARC_LEON_REG + 0x40)
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#define SPARC_LEON_TI1_CRELOAD (SPARC_LEON_REG + 0x44)
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#define SPARC_LEON_SCALER (SPARC_LEON_REG + 0x60)
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#define SPARC_LEON_SRELOAD (SPARC_LEON_REG + 0x64)
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/* LEON timer control register bits */
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#define SPARC_LEON_TI1_EN 1 /* System Enable */
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#define SPARC_LEON_TI1_RL 2 /* Continuous Running */
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#define SPARC_LEON_TI1_LD 4 /* Counter Load */
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#define SPARC_LEON_TI1_CONTROL (SPARC_LEON_REG + 0x48)
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externC cyg_int32 cyg_hal_sparc_clock_period;
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#define HAL_CLOCK_INITIALIZE( _period_ ) CYG_MACRO_START \
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cyg_hal_sparc_clock_period = (_period_); \
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HAL_WRITE_UINT32( SPARC_LEON_TI1_CRELOAD, (_period_) ); \
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HAL_WRITE_UINT32( SPARC_LEON_TI1_COUNTER, (_period_) ); \
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HAL_WRITE_UINT32( SPARC_LEON_TI1_CONTROL, \
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(SPARC_LEON_TI1_EN | \
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SPARC_LEON_TI1_RL | \
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SPARC_LEON_TI1_LD) ); \
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CYG_MACRO_END
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#define HAL_CLOCK_RESET( _vector_, _period_ ) /* nowt, it is freerunning */
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#define HAL_CLOCK_READ( _pvalue_ ) CYG_MACRO_START \
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cyg_uint32 _read_; \
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HAL_READ_UINT32( SPARC_LEON_TI1_COUNTER, _read_ ); \
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*((cyg_uint32 *)(_pvalue_)) = \
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(cyg_hal_sparc_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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