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1018 decky 1
#
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# Copyright (C) 2006 Martin Decky
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# All rights reserved.
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#
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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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# are met:
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#
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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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# - 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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#   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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#   derived from this software without specific prior written permission.
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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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# 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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# 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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# 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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# 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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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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#define INITIAL_STACK 0x0
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#define PSTATE_IE_BIT	2
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.register %g2, #scratch
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.register %g3, #scratch
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.register %g6, #scratch
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.register %g7, #scratch
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.section BOOTSTRAP, "ax"
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.global start
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start:
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	b 1f
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	nop
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/*
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 * This header forces SILO to load the image at 0x4000.
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 * More precisely, SILO will think this is an old version of Linux.
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 */
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	.ascii "HdrS"
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	.word 0
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	.half 0
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.align 8
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1:
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	flushw
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	/*
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	 * Disable interrupts.
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	 */
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	rdpr %pstate, %g2
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	and %g2, ~PSTATE_IE_BIT, %g2	! mask the Interrupt Enable bit
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	wrpr %g2, 0, %pstate
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	# TODO: set initial stack
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	set ofw_cif, %l0
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	call init		! initialize OpenFirmware
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	stx %o4, [%l0]
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	b bootstrap
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	nop