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Annotation of sys/arch/landisk/landisk/locore.S, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: locore.S,v 1.2 2007/02/06 23:13:37 miod Exp $ */
        !             2: /*     $NetBSD: locore.S,v 1.1 2006/09/01 21:26:18 uwe Exp $   */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 2002 The NetBSD Foundation, Inc.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms, with or without
        !             9:  * modification, are permitted provided that the following conditions
        !            10:  * are met:
        !            11:  * 1. Redistributions of source code must retain the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer.
        !            13:  * 2. Redistributions in binary form must reproduce the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer in the
        !            15:  *    documentation and/or other materials provided with the distribution.
        !            16:  * 3. All advertising materials mentioning features or use of this software
        !            17:  *    must display the following acknowledgement:
        !            18:  *        This product includes software developed by the NetBSD
        !            19:  *        Foundation, Inc. and its contributors.
        !            20:  * 4. Neither the name of The NetBSD Foundation nor the names of its
        !            21:  *    contributors may be used to endorse or promote products derived
        !            22:  *    from this software without specific prior written permission.
        !            23:  *
        !            24:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
        !            25:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
        !            26:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
        !            27:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
        !            28:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
        !            29:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
        !            30:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
        !            31:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
        !            32:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
        !            33:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        !            34:  * POSSIBILITY OF SUCH DAMAGE.
        !            35:  */
        !            36:
        !            37: #include "assym.h"
        !            38:
        !            39: #include <sh/asm.h>
        !            40: #include <sh/locore.h>
        !            41: #include <sh/trap.h>
        !            42: #include <sh/mmu_sh4.h>
        !            43:
        !            44: /*
        !            45:  * void start(int howto, void *bootinfo);
        !            46:  *     Kernel entry point.
        !            47:  */
        !            48: NENTRY(start)
        !            49: ALTENTRY(kernel_text)
        !            50:        /* Set bootstrap stack pointer */
        !            51:        mov.l   _L.bootstrap_stack, r15
        !            52:
        !            53:        /* Mask all interrupt */
        !            54:        __INTR_MASK(r0, r1)
        !            55:
        !            56:        /* MMU off */
        !            57:        mov.l   _L.MMUCR, r0
        !            58:        xor     r1, r1
        !            59:        mov.l   r1, @r0
        !            60:
        !            61:        /* Make sure to change register bank 0 */
        !            62:        mov     #0x20, r1
        !            63:        stc     sr, r0
        !            64:        swap.b  r1, r1
        !            65:        swap.w  r1, r1
        !            66:        not     r1, r1
        !            67:        and     r1, r0
        !            68:        ldc     r0, sr  /* SR.RB = 0 */
        !            69:
        !            70:        /* Go! */
        !            71:        mov.l   _L.landisk_startup, r0
        !            72:        jmp     @r0
        !            73:         nop
        !            74:
        !            75:        /* NOTREACHED */
        !            76:        .align  2
        !            77: _L.landisk_startup:    .long   _C_LABEL(landisk_startup)
        !            78: _L.bootstrap_stack:    .long   _C_LABEL(start)
        !            79: _L.MMUCR:              .long   SH4_MMUCR
        !            80:
        !            81: ENTRY(getramsize)
        !            82:        mov     #4, r0
        !            83:        trapa   #0x3f
        !            84:        rts
        !            85:         nop