00001 #ifndef _ARCH_AVR32_INTERRUPT_HANDLER_H_ 00002 #define _ARCH_AVR32_INTERRUPT_HANDLER_H_ 00003 00004 /* 00005 * Copyright (C) 2001-2005 by egnite Software GmbH. All rights reserved. 00006 * 00007 * Redistribution and use in source and binary forms, with or without 00008 * modification, are permitted provided that the following conditions 00009 * are met: 00010 * 00011 * 1. Redistributions of source code must retain the above copyright 00012 * notice, this list of conditions and the following disclaimer. 00013 * 2. Redistributions in binary form must reproduce the above copyright 00014 * notice, this list of conditions and the following disclaimer in the 00015 * documentation and/or other materials provided with the distribution. 00016 * 3. Neither the name of the copyright holders nor the names of 00017 * contributors may be used to endorse or promote products derived 00018 * from this software without specific prior written permission. 00019 * 00020 * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS 00021 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00022 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 00023 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE 00024 * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 00025 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 00026 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 00027 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 00028 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00029 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 00030 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00031 * SUCH DAMAGE. 00032 * 00033 * For additional information see http://www.ethernut.de/ 00034 */ 00035 00036 /* 00037 * $Log: ihndlr.h,v $ 00038 * 00039 */ 00040 00041 // 00042 // W A R N I N G 00043 // ------------- 00044 // 00045 // This file is not part of the Nut/OS API. It exists for the convenience 00046 // of Interrupt Handling. This header file may change from version 00047 // to version without notice, or even be removed. 00048 // 00049 // We mean it. 00050 // 00051 // 00052 00054 #if __GNUC__ 00055 typedef void (*__int_handler)(void); 00056 #elif __ICCAVR32__ 00057 typedef void (__interrupt *__int_handler)(void); 00058 #endif 00059 00060 extern void register_interrupt(__int_handler handler, unsigned int irq, unsigned int int_lev); 00061 00062 /* 00063 WHEN CHANGING PLEASE NOTICE: 00064 Errata 41.5.5.5 reads: 00065 "Need two NOPs instruction after instructions masking interrupts 00066 The instructions following in the pipeline the instruction masking the interrupt through SR 00067 may behave abnormally. 00068 Fix/Workaround 00069 Place two NOPs instructions after each SSRF or MTSR instruction setting IxM or GM in SR." 00070 */ 00071 #define IRQ_ENTRY() \ 00072 { \ 00073 /* Prevent preempted interrupts disabling global interrupts */ \ 00074 __asm__ __volatile__ ("ssrf\t%0; nop; nop" :: "i" (AVR32_SR_GM_OFFSET) : "memory"); \ 00075 \ 00076 /* Save R0..R7. Other registers are saved by the CPU if __AVR32_UC__ */ \ 00077 /* Or by exception.S if __AVR32_AP7000__ */ \ 00078 __asm__ __volatile__ ("pushm r0-r7"); \ 00079 } 00080 00081 00082 #define IRQ_EXIT() \ 00083 { \ 00084 /* Restore R0..R7 */ \ 00085 __asm__ __volatile__ ("popm r0-r7"); \ 00086 \ 00087 /* Prevent preempted interrupts disabling global interrupts */ \ 00088 __asm__ __volatile__ ("csrf\t%0" :: "i" (AVR32_SR_GM_OFFSET) : "memory"); \ 00089 } 00090 00091 #endif // _ARCH_AVR32_INTERRUPT_HANDLER_H_