vectors.S

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    1 /*      $NetBSD: vectors.S,v 1.4 2002/08/17 16:36:32 thorpej Exp $      */
    2 
    3 /*-
    4  * Copyright (C) 1994-1997 Mark Brinicombe
    5  * Copyright (C) 1994 Brini
    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 Brini.
   19  * 4. The name of Brini may not be used to endorse or promote products
   20  *    derived from this software without specific prior written permission.
   21  * 
   22  * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR
   23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
   25  * IN NO EVENT SHALL BRINI BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32  *
   33  */
   34 
   35 #include <machine/asm.h>
   36 __FBSDID("$FreeBSD: releng/6.2/sys/arm/arm/vectors.S 139735 2005-01-05 21:58:49Z imp $");
   37 
   38 /*
   39  * These are the exception vectors copied down to page 0.
   40  *
   41  * Note that FIQs are special; rather than using a level of
   42  * indirection, we actually copy the FIQ code down into the
   43  * vector page.
   44  */
   45 
   46         .text
   47         .align  0
   48         .global _C_LABEL(page0), _C_LABEL(page0_data), _C_LABEL(page0_end)
   49         .global _C_LABEL(fiqvector)
   50 
   51 _C_LABEL(page0):
   52         ldr     pc, .Lreset_target
   53         ldr     pc, .Lundefined_target
   54         ldr     pc, .Lswi_target
   55         ldr     pc, .Lprefetch_abort_target
   56         ldr     pc, .Ldata_abort_target
   57         ldr     pc, .Laddress_exception_target
   58         ldr     pc, .Lirq_target
   59 #ifdef __ARM_FIQ_INDIRECT
   60         ldr     pc, .Lfiq_target
   61 #else
   62 .Lfiqvector:
   63         .set    _C_LABEL(fiqvector), . - _C_LABEL(page0)
   64         subs    pc, lr, #4
   65         .org    .Lfiqvector + 0x100
   66 #endif
   67 
   68 _C_LABEL(page0_data):
   69 .Lreset_target:
   70         .word   reset_entry
   71 
   72 .Lundefined_target:
   73         .word   undefined_entry
   74 
   75 .Lswi_target:
   76         .word   swi_entry
   77 
   78 .Lprefetch_abort_target:
   79         .word   prefetch_abort_entry
   80 
   81 .Ldata_abort_target:
   82         .word   data_abort_entry
   83 
   84 .Laddress_exception_target:
   85         .word   address_exception_entry
   86 
   87 .Lirq_target:
   88         .word   irq_entry
   89 
   90 #ifdef __ARM_FIQ_INDIRECT
   91 .Lfiq_target:
   92         .word   _C_LABEL(fiqvector)
   93 #else
   94         .word   0       /* pad it out */
   95 #endif
   96 _C_LABEL(page0_end):
   97 
   98 #ifdef __ARM_FIQ_INDIRECT
   99         .data
  100         .align  0
  101 _C_LABEL(fiqvector):
  102         subs    pc, lr, #4
  103         .org    _C_LABEL(fiqvector) + 0x100
  104 #endif

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