#ifndef CYGONCE_HAL_HAL_DIAG_H
#define CYGONCE_HAL_HAL_DIAG_H

//=============================================================================
//
//      hal_diag.h
//
//      HAL Support for Kernel Diagnostic Routines
//
//=============================================================================
//####COPYRIGHTBEGIN####
//
// -------------------------------------------
// The contents of this file are subject to the Cygnus eCos Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License.  You may obtain a copy of the License at
// http://sourceware.cygnus.com/ecos
// 
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
// License for the specific language governing rights and limitations under
// the License.
// 
// The Original Code is eCos - Embedded Cygnus Operating System, released
// September 30, 1998.
// 
// The Initial Developer of the Original Code is Cygnus.  Portions created
// by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions.  All Rights Reserved.
// -------------------------------------------
//
//####COPYRIGHTEND####
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     nickg
// Contributors:  nickg
// Date:          1999-03-23
// Purpose:       HAL Support for Kernel Diagnostic Routines
// Description:   Diagnostic routines for use during kernel development.
// Usage:         #include <cyg/hal/hal_diag.h>
//
//####DESCRIPTIONEND####
//
//=============================================================================

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>
#include <cyg/hal/hal_intr.h>    // HAL_DISABLE/RESTORE_INTERRUPTS macros

//-----------------------------------------------------------------------------
// Register addresses
  
#define PAL_RESET        0x00
#define PAL_CPU_NR       0x04
#define PAL_INT          0x08
#define PAL_NR_CPU       0x0a

#define PAL_READ_FIFO    0x10
#define PAL_READ_STATUS  0x14
#define PAL_WRITE_FIFO   0x18
#define PAL_WRITE_STATUS 0x1a

#define OEA_DEV          0xf0001000

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

#define HAL_DIAG_INIT()

#define HAL_DIAG_WRITE_CHAR(_c_)                        \
CYG_MACRO_START                                         \
    volatile unsigned char *tty_buffer =                \
        (unsigned char*)(OEA_DEV + PAL_WRITE_FIFO);     \
    volatile unsigned char *tty_status =                \
        (unsigned char*)(OEA_DEV + PAL_WRITE_STATUS);   \
    unsigned long __state;                              \
                                                        \
    HAL_DISABLE_INTERRUPTS(__state)                     \
    if( _c_ != '\r' )                                   \
    {                                                   \
        while( *tty_status == 0 ) continue;             \
        *tty_buffer = _c_;                              \
    }                                                   \
    HAL_RESTORE_INTERRUPTS(__state);                    \
CYG_MACRO_END

#define HAL_DIAG_READ_CHAR(_c_)                         \
CYG_MACRO_START                                         \
    volatile unsigned char *tty_buffer =                \
        (unsigned char*)(OEA_DEV + PAL_READ_FIFO);      \
    volatile unsigned char *tty_status =                \
        (unsigned char*)(OEA_DEV + PAL_READ_STATUS);    \
    while( *tty_status == 0 ) continue;                 \
    _c_ = *tty_buffer;                                  \
CYG_MACRO_END

//-----------------------------------------------------------------------------
// end of hal_diag.h
#endif // CYGONCE_HAL_HAL_DIAG_H