Subversion Repositories HelenOS

#
# Copyright (c) 2006 Martin Decky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

#include "regname.h"
#include "main.h"

.set noat
.set noreorder
.set nomacro

.section BOOTSTRAP

.global start
start:
    
    /* Setup CPU map (on msim this code
       is executed in parallel on all CPUs,
       but it not an issue) */
    la $a0, CPUMAP
    
    sw $zero, 0($a0)
    sw $zero, 4($a0)
    sw $zero, 8($a0)
    sw $zero, 12($a0)
    
    sw $zero, 16($a0)
    sw $zero, 20($a0)
    sw $zero, 24($a0)
    sw $zero, 28($a0)
    
    sw $zero, 32($a0)
    sw $zero, 36($a0)
    sw $zero, 40($a0)
    sw $zero, 44($a0)
    
    sw $zero, 48($a0)
    sw $zero, 52($a0)
    sw $zero, 56($a0)
    sw $zero, 60($a0)
    
    sw $zero, 64($a0)
    sw $zero, 68($a0)
    sw $zero, 72($a0)
    sw $zero, 76($a0)
    
    sw $zero, 80($a0)
    sw $zero, 84($a0)
    sw $zero, 88($a0)
    sw $zero, 92($a0)
    
    sw $zero, 96($a0)
    sw $zero, 100($a0)
    sw $zero, 104($a0)
    sw $zero, 108($a0)
    
    sw $zero, 112($a0)
    sw $zero, 116($a0)
    sw $zero, 120($a0)
    sw $zero, 124($a0)
    
    lui $a1, 1
    
#ifdef MACHINE_msim
    
    /* Read dorder value */
    la $k0, MSIM_DORDER_ADDRESS
    lw $k1, ($k0)
    
    /* If we are not running on BSP
       then end in an infinite loop  */
    beq $k1, $zero, bsp
    nop
    
    /* Record CPU presence */
    sll $a2, $k1, 2
    addu $a2, $a2, $a0
    sw $a1, ($a2)
    
    loop:
        j loop
        nop
    
#endif
    
    bsp:
        /* Record CPU presence */
        sw $a1, ($a0)
        
        /* Setup initial stack */
        la $sp, INITIAL_STACK
        
        j bootstrap
        nop