00001 /* 00002 * Copyright (C) 2005 by egnite Software GmbH. All rights reserved. 00003 * 00004 * Redistribution and use in source and binary forms, with or without 00005 * modification, are permitted provided that the following conditions 00006 * are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the copyright holders nor the names of 00014 * contributors may be used to endorse or promote products derived 00015 * from this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS 00018 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00019 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 00020 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE 00021 * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 00022 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 00023 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 00024 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 00025 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00026 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 00027 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00028 * SUCH DAMAGE. 00029 * 00030 * For additional information see http://www.ethernut.de/ 00031 * 00032 */ 00033 00034 /* 00035 * $Log$ 00036 * Revision 1.4 2008/08/11 06:59:12 haraldkipp 00037 * BSD types replaced by stdint types (feature request #1282721). 00038 * 00039 * Revision 1.3 2006/07/05 07:56:34 haraldkipp 00040 * Interrupt handler will be included only, if the related interrupt 00041 * ID is defined in the platform specific header file. 00042 * 00043 * Revision 1.2 2006/06/28 17:10:35 haraldkipp 00044 * Include more general header file for ARM. 00045 * 00046 * Revision 1.1 2005/10/24 08:56:09 haraldkipp 00047 * First check in. 00048 * 00049 */ 00050 00051 #include <arch/arm.h> 00052 #include <dev/irqreg.h> 00053 00054 #if defined(WDI_ID) 00055 00056 #ifndef NUT_IRQPRI_WDI 00057 #define NUT_IRQPRI_WDI 4 00058 #endif 00059 00060 static int WatchdogIrqCtl(int cmd, void *param); 00061 00062 IRQ_HANDLER sig_WDI = { 00063 #ifdef NUT_PERFMON 00064 0, /* Interrupt counter, ir_count. */ 00065 #endif 00066 NULL, /* Passed argument, ir_arg. */ 00067 NULL, /* Handler subroutine, ir_handler. */ 00068 WatchdogIrqCtl /* Interrupt control, ir_ctl. */ 00069 }; 00070 00074 void WatchdogIrqEntry(void) __attribute__ ((naked)); 00075 void WatchdogIrqEntry(void) 00076 { 00077 IRQ_ENTRY(); 00078 #ifdef NUT_PERFMON 00079 sig_WDI.ir_count++; 00080 #endif 00081 if (sig_WDI.ir_handler) { 00082 (sig_WDI.ir_handler) (sig_WDI.ir_arg); 00083 } 00084 IRQ_EXIT(); 00085 } 00086 00102 static int WatchdogIrqCtl(int cmd, void *param) 00103 { 00104 int rc = 0; 00105 unsigned int *ival = (unsigned int *)param; 00106 int_fast8_t enabled = inr(AIC_IMR) & _BV(WDI_ID); 00107 00108 /* Disable interrupt. */ 00109 if (enabled) { 00110 outr(AIC_IDCR, _BV(WDI_ID)); 00111 } 00112 00113 switch(cmd) { 00114 case NUT_IRQCTL_INIT: 00115 /* Set the vector. */ 00116 outr(AIC_SVR(WDI_ID), (unsigned int)WatchdogIrqEntry); 00117 /* Initialize to edge triggered with defined priority. */ 00118 outr(AIC_SMR(WDI_ID), AIC_SRCTYPE_INT_EDGE_TRIGGERED | NUT_IRQPRI_WDI); 00119 /* Clear interrupt */ 00120 outr(AIC_ICCR, _BV(WDI_ID)); 00121 break; 00122 case NUT_IRQCTL_STATUS: 00123 if (enabled) { 00124 *ival |= 1; 00125 } 00126 else { 00127 *ival &= ~1; 00128 } 00129 break; 00130 case NUT_IRQCTL_ENABLE: 00131 enabled = 1; 00132 break; 00133 case NUT_IRQCTL_DISABLE: 00134 enabled = 0; 00135 break; 00136 case NUT_IRQCTL_GETPRIO: 00137 *ival = inr(AIC_SMR(WDI_ID)) & AIC_PRIOR; 00138 break; 00139 case NUT_IRQCTL_SETPRIO: 00140 outr(AIC_SMR(WDI_ID), (inr(AIC_SMR(WDI_ID)) & ~AIC_PRIOR) | *ival); 00141 break; 00142 #ifdef NUT_PERFMON 00143 case NUT_IRQCTL_GETCOUNT: 00144 *ival = (unsigned int)sig_WDI.ir_count; 00145 sig_WDI.ir_count = 0; 00146 break; 00147 #endif 00148 default: 00149 rc = -1; 00150 break; 00151 } 00152 00153 /* Enable interrupt. */ 00154 if (enabled) { 00155 outr(AIC_IECR, _BV(WDI_ID)); 00156 } 00157 return rc; 00158 } 00159 00160 #endif /* WDI_ID */