Return to locore.S CVS log

Up to [local] / sys / arch / landisk / landisk

Annotation of sys/arch/landisk/landisk/locore.S, Revision 1.1.1.1

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