forked from Imagelibrary/rtems
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/*
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* Clock Tick interrupt conexion code.
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*
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* COPYRIGHT (c) 1989-1997.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may in
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* the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* Modified to support the MPC750.
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* Modifications Copyright (c) 1999 Eric Valette valette@crf.canon.fr
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*
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* $Id$
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*/
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#include <bsp.h>
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#include <rtems/bspIo.h>
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#include <bsp/irq.h>
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extern void clockOn(void*);
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extern void clockOff (void*);
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extern int clockIsOn(void*);
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extern void Clock_isr(void);
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static rtems_irq_connect_data clockIrqData = {BSP_PERIODIC_TIMER,
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(rtems_irq_hdl)Clock_isr,
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NULL,
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(rtems_irq_enable)clockOn,
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(rtems_irq_disable)clockOff,
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(rtems_irq_is_enabled)clockIsOn};
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int BSP_get_clock_irq_level(void)
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{
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/*
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* Caution : if you change this, you must change the
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* definition of BSP_PERIODIC_TIMER accordingly
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*/
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return BSP_PERIODIC_TIMER;
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}
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int BSP_disconnect_clock_handler (void)
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{
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if (!BSP_get_current_rtems_irq_handler(&clockIrqData)) {
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printk("Unable to stop system clock\n");
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rtems_fatal_error_occurred(1);
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}
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return BSP_remove_rtems_irq_handler (&clockIrqData);
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}
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int BSP_connect_clock_handler (rtems_irq_hdl hdl)
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{
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if (!BSP_get_current_rtems_irq_handler(&clockIrqData)) {
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printk("Unable to get system clock handler\n");
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rtems_fatal_error_occurred(1);
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}
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if (!BSP_remove_rtems_irq_handler (&clockIrqData)) {
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printk("Unable to remove current system clock handler\n");
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rtems_fatal_error_occurred(1);
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}
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/*
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* Reinit structure
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*/
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clockIrqData.name = BSP_PERIODIC_TIMER;
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clockIrqData.hdl = (rtems_irq_hdl) hdl;
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clockIrqData.on = (rtems_irq_enable)clockOn;
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clockIrqData.off = (rtems_irq_enable)clockOff;
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clockIrqData.isOn = (rtems_irq_is_enabled)clockIsOn;
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return BSP_install_rtems_irq_handler (&clockIrqData);
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}
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