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* Copyright (c) 2007 Petr Stepan
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* - The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* @brief Interrupts controlling routines.
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#include <arch/regutils.h>
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#include <ddi/device.h>
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#include <interrupt.h>
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#ifdef MACHINE_testarm
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#include <arch/mach/testarm/testarm.h>
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#ifdef MACHINE_integratorcp
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#include <arch/mach/integratorcp/integratorcp.h>
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/** Initial size of a table holding interrupt handlers. */
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/** Disable interrupts.
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* @return Old interrupt priority level.
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ipl_t interrupts_disable(void)
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ipl_t ipl = current_status_reg_read();
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current_status_reg_control_write(STATUS_REG_IRQ_DISABLED_BIT | ipl);
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/** Enable interrupts.
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* @return Old interrupt priority level.
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ipl_t interrupts_enable(void)
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ipl_t ipl = current_status_reg_read();
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current_status_reg_control_write(ipl & ~STATUS_REG_IRQ_DISABLED_BIT);
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/** Restore interrupt priority level.
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* @param ipl Saved interrupt priority level.
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void interrupts_restore(ipl_t ipl)
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current_status_reg_control_write(
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(current_status_reg_read() & ~STATUS_REG_IRQ_DISABLED_BIT) |
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(ipl & STATUS_REG_IRQ_DISABLED_BIT));
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/** Read interrupt priority level.
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* @return Current interrupt priority level.
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ipl_t interrupts_read(void)
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return current_status_reg_read();
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/** Initialize basic tables for exception dispatching
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* and starts the timer.
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void interrupt_init(void)
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irq_init(IRQ_COUNT, IRQ_COUNT);
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machine_timer_irq_start();