1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief NIOS2 CPU ISR Install Vector |
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5 | */ |
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6 | |
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7 | /* |
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8 | * Copyright (c) 2006 Kolja Waschk (rtemsdev/ixo.de) |
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9 | * |
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10 | * COPYRIGHT (c) 1989-2006 |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.com/license/LICENSE. |
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16 | */ |
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17 | |
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18 | #ifdef HAVE_CONFIG_H |
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19 | #include "config.h" |
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20 | #endif |
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21 | |
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22 | #include <rtems/score/isr.h> |
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23 | |
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24 | /* |
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25 | * _CPU_ISR_install_vector |
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26 | * |
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27 | * This kernel routine installs the RTEMS handler for the |
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28 | * specified vector. |
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29 | * |
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30 | * Input parameters: |
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31 | * vector - interrupt vector number |
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32 | * old_handler - former ISR for this vector number |
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33 | * new_handler - replacement ISR for this vector number |
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34 | * |
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35 | * Output parameters: NONE |
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36 | * |
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37 | * |
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38 | * NO_CPU Specific Information: |
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39 | * |
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40 | * XXX document implementation including references if appropriate |
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41 | */ |
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42 | |
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43 | void _CPU_ISR_install_vector( |
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44 | uint32_t vector, |
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45 | proc_ptr new_handler, |
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46 | proc_ptr *old_handler |
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47 | ) |
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48 | { |
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49 | *old_handler = _ISR_Vector_table[ vector ]; |
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50 | |
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51 | /* |
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52 | * If the interrupt vector table is a table of pointer to isr entry |
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53 | * points, then we need to install the appropriate RTEMS interrupt |
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54 | * handler for this vector number. |
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55 | */ |
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56 | |
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57 | _CPU_ISR_install_raw_handler( vector, new_handler, old_handler ); |
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58 | |
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59 | /* |
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60 | * We put the actual user ISR address in '_ISR_vector_table'. This will |
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61 | * be used by the _ISR_Handler so the user gets control. |
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62 | */ |
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63 | |
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64 | _ISR_Vector_table[ vector ] = new_handler; |
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65 | } |
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