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  • This comparison shows the changes necessary to convert path 
    /openrisc/trunk/rtos/ecos-2.0/packages/io/wallclock/v2_0/src
    from Rev 27 to Rev 174
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  •

Rev 27 → Rev 174

/wallclock.cxx
0,0 → 1,146
//==========================================================================
//
// devs/wallclock/wallclock.cxx
//
// Wallclock base
//
//==========================================================================
//####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
// 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.,
// 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
// 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.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): jskov
// Contributors: jskov
// Date: 2000-03-28
// Purpose: Wallclock base driver
// Description: This provides a generic wallclock base driver which
// relies on sub-drivers to provide the interface functions
// to the hardware device (see wallclock.hxx for details).
//
// The driver can be configured to run in one of two modes:
// init-get mode:
// In this mode, the hardware driver only needs to
// implement a function to read the hardware clock
// and a (possibly empty) init function which makes
// sure the hardware clock is properly initialized.
// While the driver in this mode has a smaller memory
// foot-print, it does not support battery-backed up
// clocks.
//
// set-get mode:
// Requires both set and get functions for the hardware
// device. While bigger, it allows support of
// battery-backed up clocks.
//
//
//####DESCRIPTIONEND####
//
//==========================================================================
 
#include <pkgconf/wallclock.h> // Wallclock device config
 
#include <cyg/infra/cyg_type.h> // Common type definitions and support
 
#include <cyg/hal/drv_api.h> // Driver API
 
#include <cyg/io/wallclock.hxx> // The WallClock API
 
 
//-----------------------------------------------------------------------------
// Local static variables
 
static Cyg_WallClock wallclock_instance CYGBLD_ATTRIB_INIT_AFTER( CYG_INIT_CLOCK );
 
#ifndef CYGSEM_WALLCLOCK_SET_GET_MODE
static cyg_uint32 epoch_ticks;
static cyg_uint32 epoch_time_stamp;
#endif
 
Cyg_WallClock *Cyg_WallClock::wallclock;
 
//-----------------------------------------------------------------------------
// Constructor
 
Cyg_WallClock::Cyg_WallClock()
{
// install instance pointer
wallclock = &wallclock_instance;
 
// Always allow low-level driver to initialize clock, even though it
// may not be necessary for set-get mode.
init_hw_seconds();
}
 
//-----------------------------------------------------------------------------
// Returns the number of seconds elapsed since 1970-01-01 00:00:00.
// This may involve reading the hardware, so it may take anything up to
// a second to complete.
 
cyg_uint32 Cyg_WallClock::get_current_time()
{
cyg_uint32 res;
 
cyg_drv_dsr_lock();
 
#ifdef CYGSEM_WALLCLOCK_SET_GET_MODE
res = get_hw_seconds();
#else
res = epoch_time_stamp + get_hw_seconds() - epoch_ticks;
#endif
 
cyg_drv_dsr_unlock();
 
return res;
}
 
//-----------------------------------------------------------------------------
// Sets the clock. Argument is seconds elapsed since 1970-01-01 00:00:00.
// This may involve reading or writing to the hardware, so it may take
// anything up to a second to complete.
void Cyg_WallClock::set_current_time( cyg_uint32 time_stamp )
{
cyg_drv_dsr_lock();
 
#ifdef CYGSEM_WALLCLOCK_SET_GET_MODE
set_hw_seconds(time_stamp);
#else
epoch_time_stamp = time_stamp;
epoch_ticks = get_hw_seconds();
#endif
 
cyg_drv_dsr_unlock();
}
 
//-----------------------------------------------------------------------------
// End of devs/wallclock/wallclock.cxx
/emulate.cxx
0,0 → 1,94
//==========================================================================
//
// io/wallclock/emulate.cxx
//
// Wallclock emulation implementation
//
//==========================================================================
//####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
// 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.,
// 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
// 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.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): nickg
// Contributors: nickg
// Date: 1999-03-05
// Purpose: Wallclock emulation
//
//####DESCRIPTIONEND####
//
//==========================================================================
 
#include <pkgconf/wallclock.h> // Wallclock device config
#include <pkgconf/kernel.h> // Kernel config
 
#include <cyg/infra/cyg_type.h> // Common type definitions and support
#include <cyg/kernel/ktypes.h>
 
#include <cyg/io/wallclock.hxx> // The WallClock API
 
#include <cyg/kernel/clock.hxx> // Access to kernel clock
#include <cyg/kernel/clock.inl>
 
 
// Remember the tick count at the time of initialization.
static cyg_tick_count epoch_ticks;
 
//-----------------------------------------------------------------------------
// Called to initialize the hardware clock with a known valid
// time. Which of course isn't required when doing emulation using the
// kernel clock. But we set the private epoch base to "now".
void
Cyg_WallClock::init_hw_seconds( void )
{
// Remember the current clock tick count.
epoch_ticks = Cyg_Clock::real_time_clock->current_value();
}
 
//-----------------------------------------------------------------------------
// Returns the number of seconds elapsed since the init call.
cyg_uint32
Cyg_WallClock::get_hw_seconds( void )
{
Cyg_Clock::cyg_resolution res =
Cyg_Clock::real_time_clock->get_resolution();
cyg_tick_count secs = Cyg_Clock::real_time_clock->current_value()
- epoch_ticks;
 
secs = ( secs * res.dividend ) / ( res.divisor * 1000000000LL ) ;
 
return secs;
}
 
//-----------------------------------------------------------------------------
// End of devs/wallclock/emulate.cxx

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