Annotation of sys/arch/armish/stand/boot/start.S, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: start.S,v 1.1 2006/07/28 17:12:06 kettenis Exp $ */
! 2: /* $NetBSD: srtbegin.S,v 1.7 2005/12/11 12:17:10 christos Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 2002 Wasabi Systems, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * Written by Jason R. Thorpe for Wasabi Systems, Inc.
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: * 3. All advertising materials mentioning features or use of this software
! 19: * must display the following acknowledgement:
! 20: * This product includes software developed for the NetBSD Project by
! 21: * Wasabi Systems, Inc.
! 22: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
! 23: * or promote products derived from this software without specific prior
! 24: * written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
! 30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 36: * POSSIBILITY OF SUCH DAMAGE.
! 37: */
! 38:
! 39: #include <machine/asm.h>
! 40: #include <arm/armreg.h>
! 41:
! 42: #define STACKSIZE 8192
! 43:
! 44: ENTRY(start)
! 45: /*
! 46: * We assume we've been loaded VA==PA, or that the MMU
! 47: * is disabled. Make sure the MMU is disabled so that
! 48: * we don't have to care about the caches.
! 49: */
! 50: /* Clear the BSS. */
! 51: adr r1, Lbss
! 52: ldmia r1, {r1, r2}
! 53: sub r2, r2, r1
! 54: mov r3, #0
! 55:
! 56: 1: strb r3, [r1], #0x01
! 57: subs r2, r2, #0x01
! 58: bgt 1b
! 59:
! 60: /* Set the stack pointer */
! 61: adr r1, Lstack
! 62: ldr r1, [r1]
! 63: add sp, r1, #STACKSIZE
! 64:
! 65: b _C_LABEL(main)
! 66:
! 67: Ltext:
! 68: .word _C_LABEL(__text_store)
! 69: .word _C_LABEL(start)
! 70: .word _C_LABEL(_etext)
! 71:
! 72: Ldata:
! 73: .word _C_LABEL(__data_store)
! 74: .word _C_LABEL(__data_start)
! 75:
! 76: Lbss:
! 77: .word _C_LABEL(_edata)
! 78: .word _C_LABEL(_end)
! 79:
! 80: Lstack:
! 81: .word Lstackspace
! 82:
! 83: .comm Lstackspace, STACKSIZE
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