124 lines
5.0 KiB
ArmAsm
124 lines
5.0 KiB
ArmAsm
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/*
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* (C) Copyright 2003, Psyent Corporation <www.psyent.com>
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* Scott McNutt <smcnutt@psyent.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*************************************************************************
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* Exception Vector Table
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*
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* This could have gone in the cpu soure tree, but the whole point of
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* Nios is customization -- and polluting the cpu source tree with
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* board-specific ifdef's really defeats the purpose, no? With this in
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* the board-specific tree, each board has the freedom to organize
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* vectors/traps, etc anyway it wants. The init code copies this table
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* to the proper location.
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*
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* Each board can do what it likes here. But there are four "standard"
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* handlers availble:
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*
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* _cwp_lolimit -Handles register window underflows.
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* _cwp_hilimit -Handles register window overflows.
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* _timebase_int -Increments the timebase.
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* _brkpt_hw_int -Hardware breakpoint handler.
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* _brkpt_sw_int -Software breakpoint handler.
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* _def_xhandler -Default exception handler.
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*
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* _timebase_int handles a Nios Timer interrupt and increments the
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* timestamp used for the get_timer(), reset_timer(), etc. routines. It
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* expects the timer to be configured like the standard-32 low priority
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* timer.
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*
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* _def_xhandler dispatches exceptions/traps via the external_interrupt()
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* routine. This lets you use the irq_install_handler() and handle your
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* interrupts/traps with code written in C.
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************************************************************************/
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.data
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.global _vectors
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.align 4
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_vectors:
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.long _def_xhandler@h /* Vector 0 - NMI */
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.long _cwp_lolimit@h /* Vector 1 - underflow */
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.long _cwp_hilimit@h /* Vector 2 - overflow */
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.long _brkpt_hw_int@h /* Vector 3 - Breakpoint */
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.long _brkpt_sw_int@h /* Vector 4 - Single step*/
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.long _def_xhandler@h /* Vector 5 - GNUPro debug */
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.long _def_xhandler@h /* Vector 6 - future reserved */
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.long _def_xhandler@h /* Vector 7 - future reserved */
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.long _def_xhandler@h /* Vector 8 - future reserved */
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.long _def_xhandler@h /* Vector 9 - future reserved */
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.long _def_xhandler@h /* Vector 10 - future reserved */
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.long _def_xhandler@h /* Vector 11 - future reserved */
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.long _def_xhandler@h /* Vector 12 - future reserved */
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.long _def_xhandler@h /* Vector 13 - future reserved */
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.long _def_xhandler@h /* Vector 14 - future reserved */
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.long _def_xhandler@h /* Vector 15 - future reserved */
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.long _def_xhandler@h /* Vector 16 */
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.long _def_xhandler@h /* Vector 17 */
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.long _def_xhandler@h /* Vector 18 */
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.long _def_xhandler@h /* Vector 19 */
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.long _def_xhandler@h /* Vector 20 */
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.long _def_xhandler@h /* Vector 21 */
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.long _def_xhandler@h /* Vector 22 */
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.long _def_xhandler@h /* Vector 23 */
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.long _def_xhandler@h /* Vector 24 */
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.long _def_xhandler@h /* Vector 25 */
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.long _def_xhandler@h /* Vector 26 */
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.long _def_xhandler@h /* Vector 27 */
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.long _def_xhandler@h /* Vector 28 */
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.long _def_xhandler@h /* Vector 29 */
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.long _def_xhandler@h /* Vector 30 */
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.long _def_xhandler@h /* Vector 31 */
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.long _def_xhandler@h /* Vector 32 */
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.long _def_xhandler@h /* Vector 33 */
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.long _def_xhandler@h /* Vector 34 */
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.long _def_xhandler@h /* Vector 35 */
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.long _def_xhandler@h /* Vector 36 */
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.long _def_xhandler@h /* Vector 37 */
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.long _def_xhandler@h /* Vector 38 */
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.long _def_xhandler@h /* Vector 39 */
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.long _def_xhandler@h /* Vector 40 */
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.long _def_xhandler@h /* Vector 41 */
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.long _def_xhandler@h /* Vector 42 */
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.long _def_xhandler@h /* Vector 43 */
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.long _def_xhandler@h /* Vector 44 */
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.long _def_xhandler@h /* Vector 45 */
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.long _def_xhandler@h /* Vector 46 */
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.long _def_xhandler@h /* Vector 47 */
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.long _def_xhandler@h /* Vector 48 */
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.long _def_xhandler@h /* Vector 49 */
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.long _timebase_int@h /* Vector 50 - lopri timer*/
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.long _def_xhandler@h /* Vector 51 */
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.long _def_xhandler@h /* Vector 52 */
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.long _def_xhandler@h /* Vector 53 */
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.long _def_xhandler@h /* Vector 54 */
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.long _def_xhandler@h /* Vector 55 */
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.long _def_xhandler@h /* Vector 56 */
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.long _def_xhandler@h /* Vector 57 */
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.long _def_xhandler@h /* Vector 58 */
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.long _def_xhandler@h /* Vector 59 */
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.long _def_xhandler@h /* Vector 60 */
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.long _def_xhandler@h /* Vector 61 */
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.long _def_xhandler@h /* Vector 62 */
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.long _def_xhandler@h /* Vector 63 */
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