//==========================================================================
//
//      plf_misc.c
//
//      HAL platform miscellaneous functions
//
//==========================================================================
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// -------------------------------------------                              
// 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     
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// version.                                                                 
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// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    
// for more details.                                                        
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//
// 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   
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// General Public License v2.                                               
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// on this file might be covered by the GNU General Public License.         
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// ####ECOSGPLCOPYRIGHTEND####                                              
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    yoshinori sato
// Contributors: yoshinori sato
// Date:         2002-02-17
// Purpose:      HAL miscellaneous functions
// Description:  This file contains miscellaneous functions provided by the
//               HAL.
//
//####DESCRIPTIONEND####
//
//========================================================================*/

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>         // Base types

#include <cyg/hal/hal_arch.h>           // architectural definitions
#include <cyg/hal/hal_io.h>
#include <cyg/hal/hal_if.h>
#include <cyg/hal/plf_intr.h>
#include <cyg/hal/var_arch.h>

/*------------------------------------------------------------------------*/

void hal_platform_init(void)
{
    hal_if_init();
}

void h8s_reset(void)
{
    __asm__ ("jmp @@0\n\t");
}

/*------------------------------------------------------------------------*/
/* Control C ISR support                                                  */

#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)

struct Hal_SavedRegisters *hal_saved_interrupt_state;

#endif

/*------------------------------------------------------------------------*/
/* clock support                                                            */

void hal_clock_initialize(cyg_uint32 period)
{
    cyg_uint8 prescale;
    cyg_uint8 tmp;
#if CYGNUM_HAL_H8300_RTC_PRESCALE == 8
    prescale = 0x01;
#else
#if CYGNUM_HAL_H8300_RTC_PRESCALE == 64
    prescale = 0x02;
#else
#if CYGNUM_HAL_H8300_RTC_PRESCALE == 8192
    prescale = 0x03;
#else
#error illigal RTC prescale setting
#endif
#endif
#endif
    HAL_READ_UINT8(CYGARC_MSTPCRL, tmp);
    tmp &= ~0x01;
    HAL_WRITE_UINT8(CYGARC_MSTPCRL, tmp);
    HAL_WRITE_UINT8(CYGARC_8TCORA1, period);
    HAL_WRITE_UINT8(CYGARC_8TCNT1, 0x00);
    HAL_WRITE_UINT8(CYGARC_8TCR1, 0x48 | prescale);
    HAL_WRITE_UINT8(CYGARC_8TCSR1, 0x00);
}

void hal_clock_reset(cyg_uint32 vector, cyg_uint32 period)
{
    HAL_WRITE_UINT8(CYGARC_8TCR1,0x00);
    HAL_WRITE_UINT8(CYGARC_8TCSR1,0x00);
    hal_clock_initialize(period);
}

void hal_clock_read(cyg_uint32 *pvalue)
{
    CYG_BYTE val;
    HAL_READ_UINT8(CYGARC_8TCNT1,val);
    *pvalue = val;
}

/*------------------------------------------------------------------------*/
/* End of plf_misc.c                                                      */