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#ifndef CYGONCE_HAL_HALBOOT_SI /* -*-asm-*- */

#define CYGONCE_HAL_HALBOOT_SI

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

//

//      /halboot.si

//

//      HAL bootup platform-oriented code (assembler)

//

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

//####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):           hmt

// Contributors:        hmt

// Date:                1999-02-01

// Purpose:             Bootup code, platform oriented.

// Description:

//

//####DESCRIPTIONEND####

//

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

// External Platform Initial Setup

//

// This should set up RAM and caches, and calm down any external

// interrupt sources.

//

// It is just plain included in vectors.S

//

// RAM has not yet been touched at all; in fact all you have is a

// register window selected.

        ! Empty macro for debugging vectors.S

        .macro led val

        .endm

        ! First of all - before setting up the stack - set

        ! the available memory to the full 4Mb;

#define MEC_MEMCFG (0x01f80010)

        sethi   %hi( MEC_MEMCFG ), %g1

        ld      [ %g1 + %lo(MEC_MEMCFG) ], %g2

        mov     7, %g3

        sll     %g3, 10, %g3    ! Bits 10,11,12 are of interest

        andn    %g2, %g3, %g2

        mov     4, %g3

        sll     %g3, 10, %g3    ! Bits 10,11,12 are of interest

        or      %g2, %g3, %g2   ! Shift 256k left 4 times to

        st      %g2, [ %g1 + %lo(MEC_MEMCFG) ]

                                        ! ...give memsize of 4Mb

        ! then copy the branch instructions into the vector

        rd      %tbr, %g1

        andn    %g1, 0xfff, %g1         ! clear non-address bits

        sethi   %hi(real_vector_instructions), %l0

        or      %l0, %lo(real_vector_instructions), %l0

        ld      [ %l0 ], %l1

        st      %l1, [ %g1 ]            ! into the vector

        ld      [ %l0 + 4 ], %l1

        st      %l1, [ %g1 + 4 ]        ! into the vector

#endif  /* CYGONCE_HAL_HALBOOT_SI */

/* EOF halboot.si */