1 | /* |
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2 | * Copyright (c) 2011 Aeroflex Gaisler |
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3 | * |
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4 | * BSD license: |
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5 | * |
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6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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7 | * of this software and associated documentation files (the "Software"), to deal |
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8 | * in the Software without restriction, including without limitation the rights |
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9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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10 | * copies of the Software, and to permit persons to whom the Software is |
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11 | * furnished to do so, subject to the following conditions: |
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12 | * |
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13 | * The above copyright notice and this permission notice shall be included in |
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14 | * all copies or substantial portions of the Software. |
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15 | * |
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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22 | * THE SOFTWARE. |
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23 | */ |
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24 | |
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25 | |
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26 | #include <asm-leon/leonstack.h> |
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27 | #include <asm-leon/irq.h> |
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28 | #define NULL 0 |
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29 | |
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30 | |
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31 | /* multi vector trapping version of trap handler installs */ |
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32 | int |
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33 | mvtlolevelirqinstall (int irqnr, void (*handler) ()) |
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34 | { |
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35 | unsigned long h = (unsigned long) handler; |
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36 | unsigned long *addr = |
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37 | (unsigned long *) ((locore_readtbr () & ~0xFFF) + 0x100 + (16 * irqnr)); |
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38 | |
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39 | if (irqnr == 0 || irqnr >= 15) |
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40 | { |
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41 | return 0; |
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42 | } |
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43 | |
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44 | addr[0] = ((h >> 10) & 0x3fffff) | 0x29000000; /* 29000000: sethi %hi(handler), %l4 */ |
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45 | addr[1] = ((h) & 0x3ff) | 0x81c52000; /* 81c52000: jmpl %l4 + %lo(handler), %g0 */ |
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46 | addr[2] = 0x01000000; /* 01000000: nop */ |
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47 | addr[3] = 0x01000000; /* 01000000: nop */ |
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48 | return 1; |
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49 | } |
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50 | |
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51 | int |
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52 | lolevelirqinstall (int irqnr, void (*handler) ()) |
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53 | { |
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54 | return mvtlolevelirqinstall (irqnr, handler); |
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55 | } |
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