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Diffstat (limited to 'board/altera/dk1c20/vectors.S')
| -rwxr-xr-x | board/altera/dk1c20/vectors.S | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/board/altera/dk1c20/vectors.S b/board/altera/dk1c20/vectors.S new file mode 100755 index 0000000..c83c0e7 --- /dev/null +++ b/board/altera/dk1c20/vectors.S @@ -0,0 +1,123 @@ +/* + * (C) Copyright 2003, Psyent Corporation <www.psyent.com> + * Scott McNutt <smcnutt@psyent.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + + +/************************************************************************* + * Exception Vector Table + * + * This could have gone in the cpu soure tree, but the whole point of + * Nios is customization -- and polluting the cpu source tree with + * board-specific ifdef's really defeats the purpose, no? With this in + * the board-specific tree, each board has the freedom to organize + * vectors/traps, etc anyway it wants. The init code copies this table + * to the proper location. + * + * Each board can do what it likes here. But there are four "standard" + * handlers availble: + * + * _cwp_lolimit -Handles register window underflows. + * _cwp_hilimit -Handles register window overflows. + * _timebase_int -Increments the timebase. + * _brkpt_hw_int -Hardware breakpoint handler. + * _brkpt_sw_int -Software breakpoint handler. + * _def_xhandler -Default exception handler. + * + * _timebase_int handles a Nios Timer interrupt and increments the + * timestamp used for the get_timer(), reset_timer(), etc. routines. It + * expects the timer to be configured like the standard-32 low priority + * timer. + * + * _def_xhandler dispatches exceptions/traps via the external_interrupt() + * routine. This lets you use the irq_install_handler() and handle your + * interrupts/traps with code written in C. + ************************************************************************/ + + .data + .global _vectors + .align 4 +_vectors: + + .long _def_xhandler@h /* Vector 0 - NMI */ + .long _cwp_lolimit@h /* Vector 1 - underflow */ + .long _cwp_hilimit@h /* Vector 2 - overflow */ + .long _brkpt_hw_int@h /* Vector 3 - Breakpoint */ + .long _brkpt_sw_int@h /* Vector 4 - Single step*/ + .long _def_xhandler@h /* Vector 5 - GNUPro debug */ + .long _def_xhandler@h /* Vector 6 - future reserved */ + .long _def_xhandler@h /* Vector 7 - future reserved */ + .long _def_xhandler@h /* Vector 8 - future reserved */ + .long _def_xhandler@h /* Vector 9 - future reserved */ + .long _def_xhandler@h /* Vector 10 - future reserved */ + .long _def_xhandler@h /* Vector 11 - future reserved */ + .long _def_xhandler@h /* Vector 12 - future reserved */ + .long _def_xhandler@h /* Vector 13 - future reserved */ + .long _def_xhandler@h /* Vector 14 - future reserved */ + .long _def_xhandler@h /* Vector 15 - future reserved */ + .long _def_xhandler@h /* Vector 16 */ + .long _def_xhandler@h /* Vector 17 */ + .long _def_xhandler@h /* Vector 18 */ + .long _def_xhandler@h /* Vector 19 */ + .long _def_xhandler@h /* Vector 20 */ + .long _def_xhandler@h /* Vector 21 */ + .long _def_xhandler@h /* Vector 22 */ + .long _def_xhandler@h /* Vector 23 */ + .long _def_xhandler@h /* Vector 24 */ + .long _def_xhandler@h /* Vector 25 */ + .long _def_xhandler@h /* Vector 26 */ + .long _def_xhandler@h /* Vector 27 */ + .long _def_xhandler@h /* Vector 28 */ + .long _def_xhandler@h /* Vector 29 */ + .long _def_xhandler@h /* Vector 30 */ + .long _def_xhandler@h /* Vector 31 */ + .long _def_xhandler@h /* Vector 32 */ + .long _def_xhandler@h /* Vector 33 */ + .long _def_xhandler@h /* Vector 34 */ + .long _def_xhandler@h /* Vector 35 */ + .long _def_xhandler@h /* Vector 36 */ + .long _def_xhandler@h /* Vector 37 */ + .long _def_xhandler@h /* Vector 38 */ + .long _def_xhandler@h /* Vector 39 */ + .long _def_xhandler@h /* Vector 40 */ + .long _def_xhandler@h /* Vector 41 */ + .long _def_xhandler@h /* Vector 42 */ + .long _def_xhandler@h /* Vector 43 */ + .long _def_xhandler@h /* Vector 44 */ + .long _def_xhandler@h /* Vector 45 */ + .long _def_xhandler@h /* Vector 46 */ + .long _def_xhandler@h /* Vector 47 */ + .long _def_xhandler@h /* Vector 48 */ + .long _def_xhandler@h /* Vector 49 */ + .long _timebase_int@h /* Vector 50 - lopri timer*/ + .long _def_xhandler@h /* Vector 51 */ + .long _def_xhandler@h /* Vector 52 */ + .long _def_xhandler@h /* Vector 53 */ + .long _def_xhandler@h /* Vector 54 */ + .long _def_xhandler@h /* Vector 55 */ + .long _def_xhandler@h /* Vector 56 */ + .long _def_xhandler@h /* Vector 57 */ + .long _def_xhandler@h /* Vector 58 */ + .long _def_xhandler@h /* Vector 59 */ + .long _def_xhandler@h /* Vector 60 */ + .long _def_xhandler@h /* Vector 61 */ + .long _def_xhandler@h /* Vector 62 */ + .long _def_xhandler@h /* Vector 63 */ |