Subversion Repositories openrisc

//==========================================================================

//

//      plf_misc.c

//

//      HAL platform miscellaneous functions

//

//==========================================================================

//####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, jlarmour, jskov

// Date:         2000-05-15

// 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/infra/cyg_trac.h>         // tracing macros

#include <cyg/infra/cyg_ass.h>          // assertion macros

#include <cyg/hal/hal_arch.h>           // architectural definitions

#include <cyg/hal/hal_intr.h>           // Interrupt handling

#include <cyg/hal/hal_cache.h>          // Cache handling

#include <cyg/hal/drv_api.h>            // CYG_ISR_HANDLED

#include <cyg/hal/hal_if.h>             // Calling interface definitions

#include <cyg/hal/hal_misc.h>           // Helper functions

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

#define CYGARC_REG_SUPERIO_IREG     0xb4000398

#define CYGARC_REG_SUPERIO_DREG     0xb4000399

#define CYGARC_REG_SUPERIO_FER      0x00 // function enable

#define CYGARC_REG_SUPERIO_FAR      0x01 // function address

#define CYGARC_REG_SUPERIO_PTR      0x02 // power and test

#define CYGARC_REG_SUPERIO_CLK      0x51 // clock controller

#define CYGARC_REG_SUPERIO_FER_PAR  0x01

#define CYGARC_REG_SUPERIO_FER_SCC1 0x02

#define CYGARC_REG_SUPERIO_FER_SCC2 0x04

#define CYGARC_REG_SUPERIO_CLK_14M  0x00 // 14MHz source

#define CYGARC_REG_SUPERIO_CLK_CME  0x04 // clock multiplier enabled

#define CYGARC_REG_SUPERIO_PTR_PPEXT 0x80 // extended

static void write_super_io(cyg_uint8 offset, cyg_uint8 data)

{

    HAL_WRITE_UINT8(CYGARC_REG_SUPERIO_IREG, offset);

    HAL_WRITE_UINT8(CYGARC_REG_SUPERIO_DREG, data);

    HAL_WRITE_UINT8(CYGARC_REG_SUPERIO_DREG, data);

}

void hal_platform_init(void)

{

    hal_if_init();

    // Configure the SuperIO chip

    write_super_io(CYGARC_REG_SUPERIO_FER,

                   CYGARC_REG_SUPERIO_FER_SCC1|CYGARC_REG_SUPERIO_FER_SCC2);

    write_super_io(CYGARC_REG_SUPERIO_FAR, 0x10);

    write_super_io(CYGARC_REG_SUPERIO_CLK,

                   CYGARC_REG_SUPERIO_CLK_14M|CYGARC_REG_SUPERIO_CLK_CME);

    // Set up VSC320 interrupt controller. INT1 must merge INT2 and

    // INT3 according to the platform specification.

    HAL_WRITE_UINT32(CYGARC_REG_INT_CFG1,

                     CYGARC_REG_INT_CFG_INT2|CYGARC_REG_INT_CFG_INT3);

    // Unmask vectors which are entry points for interrupt controllers

    HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_V320USC_INT0);

    HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_V320USC_INT1);

    HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_IO);

}

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

// End of plf_misc.c