sys/boot/powerpc/loader/start.c

   1 /*
   2  * $NetBSD: Locore.c,v 1.7 2000/08/20 07:04:59 tsubai Exp $
   3  * $FreeBSD: src/sys/boot/powerpc/loader/start.c,v 1.3 2003/08/05 11:30:18 grehan Exp $
   4  * $DragonFly: src/sys/boot/powerpc/loader/start.c,v 1.1 2003/11/10 06:08:40 dillon Exp $
   5  */
   6
   7 /*
   8  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
   9  * Copyright (C) 1995, 1996 TooLs GmbH.
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *      This product includes software developed by TooLs GmbH.
  23  * 4. The name of TooLs GmbH may not be used to endorse or promote products
  24  *    derived from this software without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
  27  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  28  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  29  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  31  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  32  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  33  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  34  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  35  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <stand.h>
  39 #include "libofw.h"
  40
  41 void startup(void *, int, int (*)(void *), char *, int);
  42
  43 #ifdef XCOFF_GLUE
  44 asm("                           \n\
  45         .text                   \n\
  46         .globl  _entry          \n\
  47 _entry:                         \n\
  48         .long   _start,0,0      \n\
  49 ");
  50 #endif
  51
  52 __asm("                         \n\
  53         .data                   \n\
  54 stack:                          \n\
  55         .space  16388           \n\
  56                                 \n\
  57         .text                   \n\
  58         .globl  _start          \n\
  59 _start:                         \n\
  60         li      %r8,0           \n\
  61         li      %r9,0x100       \n\
  62         mtctr   %r9             \n\
  63 1:                              \n\
  64         dcbf    %r0,%r8         \n\
  65         icbi    %r0,%r8         \n\
  66         addi    %r8,%r8,0x20    \n\
  67         bdnz    1b              \n\
  68         sync                    \n\
  69         isync                   \n\
  70                                 \n\
  71         lis     %r1,stack@ha    \n\
  72         addi    %r1,%r1,stack@l \n\
  73         addi    %r1,%r1,8192    \n\
  74                                 \n\
  75         mfmsr   %r8             \n\
  76         li      %r0,0           \n\
  77         mtmsr   %r0             \n\
  78         isync                   \n\
  79                                 \n\
  80         mtibatu 0,%r0           \n\
  81         mtibatu 1,%r0           \n\
  82         mtibatu 2,%r0           \n\
  83         mtibatu 3,%r0           \n\
  84         mtdbatu 0,%r0           \n\
  85         mtdbatu 1,%r0           \n\
  86         mtdbatu 2,%r0           \n\
  87         mtdbatu 3,%r0           \n\
  88                                 \n\
  89         li      %r9,0x12     /* BATL(0, BAT_M, BAT_PP_RW) */ \n\
  90         mtibatl 0,%r9           \n\
  91         mtdbatl 0,%r9           \n\
  92         li      %r9,0x1ffe   /* BATU(0, BAT_BL_256M, BAT_Vs) */ \n\
  93         mtibatu 0,%r9           \n\
  94         mtdbatu 0,%r9           \n\
  95         isync                   \n\
  96                                 \n\
  97         mtmsr   %r8             \n\
  98         isync                   \n\
  99                                 \n\
 100         b       startup         \n\
 101 ");
 102
 103 void
 104 startup(void *vpd, int res, int (*openfirm)(void *), char *arg, int argl)
 105 {
 106         main(openfirm);
 107 }