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Rev 1018 Rev 1685
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#
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#
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# Copyright (C) 2006 Martin Decky
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# Copyright (C) 2006 Martin Decky
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# All rights reserved.
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# All rights reserved.
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#
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#
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# Redistribution and use in source and binary forms, with or without
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# modification, are permitted provided that the following conditions
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# are met:
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# are met:
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#
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#
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# - Redistributions of source code must retain the above copyright
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# - Redistributions of source code must retain the above copyright
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#   notice, this list of conditions and the following disclaimer.
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#   notice, this list of conditions and the following disclaimer.
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# - Redistributions in binary form must reproduce the above copyright
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# - Redistributions in binary form must reproduce the above copyright
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#   notice, this list of conditions and the following disclaimer in the
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#   notice, this list of conditions and the following disclaimer in the
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#   documentation and/or other materials provided with the distribution.
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#   documentation and/or other materials provided with the distribution.
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# - The name of the author may not be used to endorse or promote products
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# - The name of the author may not be used to endorse or promote products
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#   derived from this software without specific prior written permission.
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#   derived from this software without specific prior written permission.
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#
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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#
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#include "regname.h"
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#include "regname.h"
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.set noat
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.set noat
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.set noreorder
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.set noreorder
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.set nomacro
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.set nomacro
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.text
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.text
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.global halt
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.global halt
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.global memcpy
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.global jump_to_kernel
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.global jump_to_kernel
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halt:
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halt:
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	b halt
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	b halt
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	nop
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	nop
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- 
 
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memcpy:
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	addiu	$v0,$a1,3
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	li	$v1,-4			# 0xfffffffffffffffc
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	and	$v0,$v0,$v1
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	beq	$a1,$v0,3f
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	move	$t0,$a0
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0:
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	beq	$a2,$zero,2f
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	move	$a3,$zero
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1:
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	addu	$v0,$a1,$a3
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	lbu	$a0,0($v0)
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	addu	$v1,$t0,$a3
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	addiu	$a3,$a3,1
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	bne	$a3,$a2,1b
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	sb	$a0,0($v1)
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2:
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	jr	$ra
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	move	$v0,$a1
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3:
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	addiu	$v0,$a0,3
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	and	$v0,$v0,$v1
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	bne	$a0,$v0,0b
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	srl	$t1,$a2,2
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	beq	$t1,$zero,5f
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	move	$a3,$zero
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	move	$a3,$zero
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	move	$a0,$zero
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4:
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	addu	$v0,$a1,$a0
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	lw	$v1,0($v0)
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	addiu	$a3,$a3,1
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	addu	$v0,$t0,$a0
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	sw	$v1,0($v0)
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	bne	$a3,$t1,4b
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	addiu	$a0,$a0,4
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5:
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	andi	$a2,$a2,0x3
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	beq	$a2,$zero,2b
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	nop
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	sll	$v0,$a3,2
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	addu	$t1,$v0,$t0
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	move	$a3,$zero
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	addu	$t0,$v0,$a1
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6:
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	addu	$v0,$t0,$a3
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	lbu	$a0,0($v0)
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	addu	$v1,$t1,$a3
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	addiu	$a3,$a3,1
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	bne	$a3,$a2,6b
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	sb	$a0,0($v1)
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	jr	$ra
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	move	$v0,$a1
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jump_to_kernel:
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jump_to_kernel:
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#	.word 0x39
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#	.word 0x39
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	j $a0
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	j $a0
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	nop
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	nop
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