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143 lines
3.1 KiB
ArmAsm
143 lines
3.1 KiB
ArmAsm
/* $NetBSD: ofwstart.S,v 1.4 2014/09/20 23:10:46 phx Exp $ */
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/*-
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* Copyright (c) 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Tim Rightnour
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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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* 1. 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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* 2. 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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef XCOFF_GLUE
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.text
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.globl _entry
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_entry:
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.long _start,0,0
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#endif /* XCOFF_GLUE */
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.text
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.globl _start
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/* This is the magical note section that IBM machines require
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* to boot. This should be a note, but gnu ld will not let us
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* position it at the start of the file.
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*/
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# length of name
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.long 8
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# note descriptor size
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.long 24
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# note type (IEEE 1275)
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.long 0x1275
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# name of owner
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.asciz "PowerPC"
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.balign 4
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# note descriptor
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# real mode (-1) or virtual mode (0)
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.long -1
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# real-base
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.long -1
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# real-size
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.long -1
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# virt-base
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.long -1
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# virt-size
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.long -1
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# load-base
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.long 0x4000
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/* note for dealing with IBM LPARs */
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# length of name
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.long 24
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# note descriptor size
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.long 28
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# note type
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.long 0x12759999
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# name of owner
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.asciz "IBM,RPA-Client-Config"
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.balign 4
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# lpar affinity
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.long 0
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# minimum size in megabytes
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.long 64
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# minimum percentage size
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.long 0
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# max pft size ( 2^48 bytes )
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.long 48
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# splpar
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.long 1
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# min load ?
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.long -1
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# new mem def ?
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.long 0
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_start:
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sync
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isync
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lis %r1,stack+0x20000@ha
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addi %r1,%r1,stack+0x20000@l
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mfmsr %r8
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li %r0,0
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mtmsr %r0
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isync
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mtibatu 0,%r0
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mtibatu 1,%r0
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mtibatu 2,%r0
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mtibatu 3,%r0
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mtdbatu 0,%r0
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mtdbatu 1,%r0
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mtdbatu 2,%r0
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mtdbatu 3,%r0
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li %r9,0x12 /* BATL(0, BAT_M, BAT_PP_RW) */
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mtibatl 0,%r9
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mtdbatl 0,%r9
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li %r9,0x1ffe /* BATU(0, BAT_BL_256M, BAT_Vs) */
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mtibatu 0,%r9
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mtdbatu 0,%r9
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isync
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mtmsr %r8
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isync
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/*
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* Make sure that .bss is zeroed
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*/
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li %r0,0
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lis %r8,_edata@ha
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addi %r8,%r8,_edata@l
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lis %r9,_end@ha
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addi %r9,%r9,_end@l
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5: cmpw 0,%r8,%r9
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bge 6f
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stw %r0,0(%r8)
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addi %r8,%r8,4
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b 5b
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6: b startup
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