/*      $NetBSD: start.S,v 1.3 2008/04/28 20:23:29 martin Exp $ */

/*
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Wayne Knowles
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#include <mips/asm.h>
#include <mips/cpuregs.h>
#include <machine/prom.h>

LEAF(start)
       .set    noreorder
#ifdef __GP_SUPPORT__
       la      gp, _C_LABEL (_gp)
#endif
       la      sp, start - CALLFRAME_SIZ
       sw      zero, CALLFRAME_RA(sp)          # clear ra for debugger
       sw      zero, CALLFRAME_SP(sp)          # clear fp for debugger
       move    s0, a0                          # save argc
       move    s1, a1                          # save argv

       la      a0, _C_LABEL (edata)            # clear BSS
       move    a1, zero
       la      a2, _C_LABEL (end)
       jal     _C_LABEL(memset)                # memset(edata, 0, end - edata)
       subu    a2, a2, a0

       move    a0, s0                          # restore argc
       jal     _C_LABEL(main)                  # main(argc, argv)
       move    a1, s1                          # restore argv

XLEAF(_rtt)
       la      t9, _C_LABEL(prom_restart)              # restart...
       j       t9
       move    a0, zero
END(start)

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