1 | /* |
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2 | * Interrupt Manager |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989-1998. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * Copyright assigned to U.S. Government, 1994. |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.OARcorp.com/rtems/license.html. |
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12 | * |
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13 | * $Id$ |
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14 | */ |
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15 | |
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16 | #include <rtems/system.h> |
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17 | #include <rtems/rtems/status.h> |
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18 | #include <rtems/score/isr.h> |
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19 | #include <rtems/rtems/intr.h> |
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20 | |
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21 | /* rtems_interrupt_catch |
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22 | * |
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23 | * This directive allows a thread to specify what action to take when |
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24 | * catching signals. |
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25 | * |
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26 | * Input parameters: |
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27 | * new_isr_handler - address of interrupt service routine (isr) |
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28 | * vector - interrupt vector number |
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29 | * old_isr_handler - address at which to store previous ISR address |
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30 | * |
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31 | * Output parameters: |
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32 | * RTEMS_SUCCESSFUL - always succeeds |
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33 | * *old_isr_handler - previous ISR address |
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34 | */ |
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35 | |
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36 | rtems_status_code rtems_interrupt_catch( |
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37 | rtems_isr_entry new_isr_handler, |
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38 | rtems_vector_number vector, |
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39 | rtems_isr_entry *old_isr_handler |
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40 | ) |
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41 | { |
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42 | if ( !_ISR_Is_vector_number_valid( vector ) ) |
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43 | return RTEMS_INVALID_NUMBER; |
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44 | |
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45 | if ( !_ISR_Is_valid_user_handler( (void *) new_isr_handler ) ) |
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46 | return RTEMS_INVALID_ADDRESS; |
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47 | |
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48 | if ( !_ISR_Is_valid_user_handler( (void *) old_isr_handler ) ) |
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49 | return RTEMS_INVALID_ADDRESS; |
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50 | |
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51 | _ISR_Install_vector( |
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52 | vector, (proc_ptr)new_isr_handler, (proc_ptr *)old_isr_handler ); |
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53 | |
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54 | return RTEMS_SUCCESSFUL; |
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55 | } |
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