board/altera/dk1s10/vectors.S

   1 /*
   2  * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
   3  * Scott McNutt <smcnutt@psyent.com>
   4  * Stephan Linz <linz@li-pro.net>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include <config.h>
  26
  27
  28 /*************************************************************************
  29  * Exception Vector Table
  30  *
  31  * This could have gone in the cpu soure tree, but the whole point of
  32  * Nios is customization -- and polluting the cpu source tree with
  33  * board-specific ifdef's really defeats the purpose, no? With this in
  34  * the board-specific tree, each board has the freedom to organize
  35  * vectors/traps, etc anyway it wants. The init code copies this table
  36  * to the proper location.
  37  *
  38  * Each board can do what it likes here. But there are four "standard"
  39  * handlers availble:
  40  *
  41  *      _cwp_lolimit    -Handles register window underflows.
  42  *      _cwp_hilimit    -Handles register window overflows.
  43  *      _timebase_int   -Increments the timebase.
  44  *      _def_xhandler   -Default exception handler.
  45  *
  46  * _timebase_int handles a Nios Timer interrupt and increments the
  47  * timestamp used for the get_timer(), reset_timer(), etc. routines. It
  48  * expects the timer to be configured like the standard-32 low priority
  49  * timer.
  50  *
  51  * _def_xhandler dispatches exceptions/traps via the external_interrupt()
  52  * routine. This lets you use the irq_install_handler() and handle your
  53  * interrupts/traps with code written in C.
  54  ************************************************************************/
  55
  56         .data
  57         .global _vectors
  58         .align  4
  59 _vectors:
  60
  61 #if     defined(CONFIG_SYS_NIOS_CPU_OCI_BASE)
  62         /* OCI does the reset job */
  63         .long   _def_xhandler@h         /* Vector 0  - NMI / Reset */
  64 #else
  65         /* there is no OCI, so we have to do a direct reset jump here */
  66         .long   CONFIG_SYS_NIOS_CPU_RST_VECT    /* Vector 0  - Reset to GERMS */
  67 #endif
  68         .long   _cwp_lolimit@h          /* Vector 1  - underflow */
  69         .long   _cwp_hilimit@h          /* Vector 2  - overflow */
  70
  71         .long   _def_xhandler@h         /* Vector 3 - GNUPro debug */
  72         .long   _def_xhandler@h         /* Vector 4 - GNUPro debug */
  73         .long   _def_xhandler@h         /* Vector 5 - GNUPro debug */
  74         .long   _def_xhandler@h         /* Vector 6 - future reserved */
  75         .long   _def_xhandler@h         /* Vector 7 - future reserved */
  76         .long   _def_xhandler@h         /* Vector 8 - future reserved */
  77         .long   _def_xhandler@h         /* Vector 9 - future reserved */
  78         .long   _def_xhandler@h         /* Vector 10 - future reserved */
  79         .long   _def_xhandler@h         /* Vector 11 - future reserved */
  80         .long   _def_xhandler@h         /* Vector 12 - future reserved */
  81         .long   _def_xhandler@h         /* Vector 13 - future reserved */
  82         .long   _def_xhandler@h         /* Vector 14 - future reserved */
  83         .long   _def_xhandler@h         /* Vector 15 - future reserved */
  84 #if     (CONFIG_SYS_NIOS_TMRIRQ == 16)
  85         .long   _timebase_int@h         /* Vector 16 - lopri timer*/
  86 #else
  87         .long   _def_xhandler@h         /* Vector 16 */
  88 #endif
  89         .long   _def_xhandler@h         /* Vector 17 */
  90         .long   _def_xhandler@h         /* Vector 18 */
  91         .long   _def_xhandler@h         /* Vector 19 */
  92         .long   _def_xhandler@h         /* Vector 20 */
  93         .long   _def_xhandler@h         /* Vector 21 */
  94         .long   _def_xhandler@h         /* Vector 22 */
  95         .long   _def_xhandler@h         /* Vector 23 */
  96         .long   _def_xhandler@h         /* Vector 24 */
  97         .long   _def_xhandler@h         /* Vector 25 */
  98         .long   _def_xhandler@h         /* Vector 26 */
  99         .long   _def_xhandler@h         /* Vector 27 */
 100         .long   _def_xhandler@h         /* Vector 28 */
 101         .long   _def_xhandler@h         /* Vector 29 */
 102         .long   _def_xhandler@h         /* Vector 30 */
 103         .long   _def_xhandler@h         /* Vector 31 */
 104         .long   _def_xhandler@h         /* Vector 32 */
 105         .long   _def_xhandler@h         /* Vector 33 */
 106         .long   _def_xhandler@h         /* Vector 34 */
 107         .long   _def_xhandler@h         /* Vector 35 */
 108         .long   _def_xhandler@h         /* Vector 36 */
 109         .long   _def_xhandler@h         /* Vector 37 */
 110         .long   _def_xhandler@h         /* Vector 38 */
 111         .long   _def_xhandler@h         /* Vector 39 */
 112         .long   _def_xhandler@h         /* Vector 40 */
 113         .long   _def_xhandler@h         /* Vector 41 */
 114         .long   _def_xhandler@h         /* Vector 42 */
 115         .long   _def_xhandler@h         /* Vector 43 */
 116         .long   _def_xhandler@h         /* Vector 44 */
 117         .long   _def_xhandler@h         /* Vector 45 */
 118         .long   _def_xhandler@h         /* Vector 46 */
 119         .long   _def_xhandler@h         /* Vector 47 */
 120         .long   _def_xhandler@h         /* Vector 48 */
 121         .long   _def_xhandler@h         /* Vector 49 */
 122 #if     (CONFIG_SYS_NIOS_TMRIRQ == 50)
 123         .long   _timebase_int@h         /* Vector 50 - lopri timer*/
 124 #else
 125         .long   _def_xhandler@h         /* Vector 50 */
 126 #endif
 127         .long   _def_xhandler@h         /* Vector 51 */
 128         .long   _def_xhandler@h         /* Vector 52 */
 129         .long   _def_xhandler@h         /* Vector 53 */
 130         .long   _def_xhandler@h         /* Vector 54 */
 131         .long   _def_xhandler@h         /* Vector 55 */
 132         .long   _def_xhandler@h         /* Vector 56 */
 133         .long   _def_xhandler@h         /* Vector 57 */
 134         .long   _def_xhandler@h         /* Vector 58 */
 135         .long   _def_xhandler@h         /* Vector 59 */
 136         .long   _def_xhandler@h         /* Vector 60 */
 137         .long   _def_xhandler@h         /* Vector 61 */
 138         .long   _def_xhandler@h         /* Vector 62 */
 139         .long   _def_xhandler@h         /* Vector 63 */