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[/] [or1k/] [trunk/] [rtems-20020807/] [c/] [src/] [lib/] [libbsp/] [arm/] [arm_bare_bsp/] [irq/] [irq.c] - Blame information for rev 1765

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1 1026 ivang 
/* irq.c
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 *
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 *  This file contains the implementation of the function described in irq.h
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 *
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 *  CopyRight (C) 2000 Canon Research France SA.
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 *  Emmanuel Raguet,  mailto:raguet@crf.canon.fr
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 *
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 *  The license and distribution terms for this file may be
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 *  found in found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  irq.c,v 1.2 2000/07/27 06:17:44 joel Exp
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 */
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#include <bsp.h>
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#include <irq.h>
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#include <registers.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/apiext.h>
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/*
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 * This function check that the value given for the irq line
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 * is valid.
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 */
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static int isValidInterrupt(int irq)
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{
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  if ( (irq < 0) || (irq > BSP_MAX_INT))
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    return 0;
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  return 1;
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}
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/*
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 * ------------------------ RTEMS Single Irq Handler Mngt Routines ----------------
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 */
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int BSP_install_rtems_irq_handler  (const rtems_irq_connect_data* irq)
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{
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    rtems_irq_hdl *HdlTable;
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    rtems_interrupt_level level;
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    if (!isValidInterrupt(irq->name)) {
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      return 0;
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    }
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    /*
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     * Check if default handler is actually connected. If not issue an error.
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     */
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    HdlTable = VECTOR_TABLE;
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    if (*(HdlTable + irq->name) != default_int_handler) {
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      return 0;
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    }
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    _CPU_ISR_Disable(level);
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    /*
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     * store the new handler
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     */
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    *(HdlTable + irq->name) = irq->hdl;
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    /*
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     * Here is the code to install an interrupt vector
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     * for the BSP : unmask INT, ....
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     * ........................
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     */
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    _CPU_ISR_Enable(level);
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    return 1;
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}
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int BSP_remove_rtems_irq_handler  (const rtems_irq_connect_data* irq)
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{
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    rtems_irq_hdl *HdlTable;
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    rtems_interrupt_level level;
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    if (!isValidInterrupt(irq->name)) {
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      return 0;
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    }
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    /*
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     * Check if the handler is actually connected. If not issue an error.
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     */
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    HdlTable = VECTOR_TABLE;
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    if (*(HdlTable + irq->name) != irq->hdl) {
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      return 0;
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    }
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    _CPU_ISR_Disable(level);
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    /*
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     * Here is the code to uninstall an interrupt vector
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     * for the BSP : mask INT, ....
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     * ........................
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     */
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    /*
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     * restore the default irq value
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     */
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    *(HdlTable + irq->name) = default_int_handler;
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    _CPU_ISR_Enable(level);
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    return 1;
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}
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void _ThreadProcessSignalsFromIrq (CPU_Exception_frame* ctx)
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{
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  /*
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   * Process pending signals that have not already been
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   * processed by _Thread_Displatch. This happens quite
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   * unfrequently : the ISR must have posted an action
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   * to the current running thread.
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   */
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  if ( _Thread_Do_post_task_switch_extension ||
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       _Thread_Executing->do_post_task_switch_extension ) {
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    _Thread_Executing->do_post_task_switch_extension = FALSE;
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    _API_extensions_Run_postswitch();
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  }
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}

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