URL
https://opencores.org/ocsvn/openrisc/openrisc/trunk
Subversion Repositories openrisc
[/] [openrisc/] [trunk/] [rtos/] [ecos-3.0/] [packages/] [hal/] [sparclite/] [sim/] [current/] [include/] [halboot.si] - Rev 856
Go to most recent revision | Compare with Previous | Blame | View Log
#ifndef CYGONCE_HAL_HALBOOT_SI /* -*-asm-*- */
#define CYGONCE_HAL_HALBOOT_SI
// ====================================================================
//
// <platform>/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 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
// 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public 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 */
Go to most recent revision | Compare with Previous | Blame | View Log