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DEFINITIONS

1. boot_entry

   1 /*-
   2  * Copyright (c) 2009, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 /*
  31  * head.S - header code for PReP platforms.
  32  */
  34 #include <conf/config.h>
  35 #include <machine/memory.h>
  36 #include <machine/syspage.h>
  39 #define BOOTSP          (BOOTSTKTOP - KERNBASE)
  41 #define MSR_EE          0x8000
  43 #define ENTRY(x) .global x; .align; x##:
  45         .section ".text","ax"
  47 /*
  48  * PReP data
  49  */
  50                 .long   0x00040000      /* boot offset: 0x400 */
  51                 .long   0x00000800      /* boot size: 0x80000 */
  53 .org    0x200
  54 /*
  55  * Loader entry point
  56  */
ENTRY(boot_entry)
  58         /*
  59          * Disable interrupts
  60          */
  61         mfmsr   %r3
  62         andi.   %r3, %r3, ~MSR_EE@l
  63         mtmsr   %r3
  65         /*
  66          * Load the boot stack
  67          */
  68         lis     r1, BOOTSP@ha
  69         ori     r1, r1, BOOTSP@l
  70         subi    r1, r1, 8
  72         b       main
  74         .section .tail,"ax"
  75 dummy:
  76         .byte   0xff
  78 .end