Annotation of sys/arch/mvme68k/stand/sboot/XSRT0.S, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: XSRT0.S,v 1.5 2003/06/04 16:36:14 deraadt Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1995 Theo de Raadt
! 5: *
! 6: * Redistribution and use in source and binary forms, with or without
! 7: * modification, are permitted provided that the following conditions
! 8: * are met:
! 9: * 1. Redistributions of source code must retain the above copyright
! 10: * notice, this list of conditions and the following disclaimer.
! 11: * 2. Redistributions in binary form must reproduce the above copyright
! 12: * notice, this list of conditions and the following disclaimer in the
! 13: * documentation and/or other materials provided with the distribution.
! 14: *
! 15: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
! 16: * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 17: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 18: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
! 19: * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 20: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 21: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 22: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 23: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 24: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 25: * SUCH DAMAGE.
! 26: *
! 27: * Copyright (c) 1995 Charles D. Cranor
! 28: * All rights reserved.
! 29: *
! 30: * Redistribution and use in source and binary forms, with or without
! 31: * modification, are permitted provided that the following conditions
! 32: * are met:
! 33: * 1. Redistributions of source code must retain the above copyright
! 34: * notice, this list of conditions and the following disclaimer.
! 35: * 2. Redistributions in binary form must reproduce the above copyright
! 36: * notice, this list of conditions and the following disclaimer in the
! 37: * documentation and/or other materials provided with the distribution.
! 38: * 3. All advertising materials mentioning features or use of this software
! 39: * must display the following acknowledgement:
! 40: * This product includes software developed by Charles D. Cranor.
! 41: * 4. The name of the author may not be used to endorse or promote products
! 42: * derived from this software without specific prior written permission.
! 43: *
! 44: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 45: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 46: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 47: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 48: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 49: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 50: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 51: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 52: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 53: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 54: */
! 55:
! 56: | start at 0x4000, load at 0xa000, stack at 0x9ff0.
! 57: .text
! 58: .globl start
! 59: start: movb #0,_reboot
! 60: jra Ldoit
! 61: restart: movb #1,_reboot | fall through
! 62:
! 63: Ldoit: movl #0x00006ff0,sp
! 64: jsr _main
! 65:
! 66: .globl ___main
! 67: ___main: rts
! 68:
! 69: Lname:
! 70: .ascii "sboot\0"
! 71:
! 72: .globl _go
! 73: _go:
! 74: clrl d0 | dev lun
! 75: clrl d1 | ctrl lun
! 76: movl #0x2c, d4 | flags for IPL
! 77: movl #0xfffe1800, a0 | address of "disk" ctrl
! 78: movl sp@(4), a1 | entry point of loaded program
! 79: movl d0, a2 | media config block (NULL)
! 80: movl sp@(8), a3 | nb args (start)
! 81: movl sp@(12), a4 | nb end args
! 82: movl #Lname, a5 | args
! 83: movl #Lname+5, a6 | end args
! 84: | SRT0 will set stack
! 85: jmp a1@ | GO!
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