56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
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/*
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* Copyright (c) 2011 Aeroflex Gaisler
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*
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* BSD license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <asm-leon/leonstack.h>
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#include <asm-leon/irq.h>
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#define NULL 0
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/* multi vector trapping version of trap handler installs */
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int
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mvtlolevelirqinstall (int irqnr, void (*handler) ())
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{
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unsigned long h = (unsigned long) handler;
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unsigned long *addr =
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(unsigned long *) ((locore_readtbr () & ~0xFFF) + 0x100 + (16 * irqnr));
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if (irqnr == 0 || irqnr >= 15)
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{
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return 0;
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}
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addr[0] = ((h >> 10) & 0x3fffff) | 0x29000000; /* 29000000: sethi %hi(handler), %l4 */
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addr[1] = ((h) & 0x3ff) | 0x81c52000; /* 81c52000: jmpl %l4 + %lo(handler), %g0 */
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addr[2] = 0x01000000; /* 01000000: nop */
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addr[3] = 0x01000000; /* 01000000: nop */
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return 1;
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}
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int
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lolevelirqinstall (int irqnr, void (*handler) ())
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{
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return mvtlolevelirqinstall (irqnr, handler);
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}
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