00001 /* 00002 * Copyright (C) 2001-2005 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: nutinit.c,v $ 00036 * Revision 1.14 2007/10/04 20:08:00 olereinhardt 00037 * Support for SAM7S256 added 00038 * 00039 * Revision 1.13 2006/09/29 12:39:51 haraldkipp 00040 * Spurious interrupt handling on all supported AT91 devices. 00041 * 00042 * Revision 1.12 2006/07/26 11:17:16 haraldkipp 00043 * Defining AT91_PLL_MAINCK will automatically determine SAM7X clock by 00044 * reading PLL settings. 00045 * 00046 * Revision 1.11 2006/07/18 14:04:10 haraldkipp 00047 * Low level hardware initialization moved to crtat91sam7x256_rom.S. This 00048 * avoids the ugly jump from C code back into the runtime initialization. 00049 * Watchdog reset (tiger bell) removed from idle thread. 00050 * 00051 * Revision 1.10 2006/07/15 11:13:30 haraldkipp 00052 * CPU ran into the data pool of Sam7xLowLevelInit(). Temporarily 00053 * fixed by Andras Albert with an additional global label in the 00054 * startup code. Furthermore Andras changed the clock initialization. 00055 * The CPU is now running at 47.9232 MHz and the MAC starts working. 00056 * Great, TCP/IP is now running on the SAM7X. 00057 * 00058 * Revision 1.9 2006/07/10 14:27:03 haraldkipp 00059 * C++ will use main instead of NutAppMain. Contributed by Matthias Wilde. 00060 * 00061 * Revision 1.8 2006/07/05 07:57:52 haraldkipp 00062 * Daidai's support for AT91SAM7X added. Possibly taken from Atmel. 00063 * May require new coding from ground up in order to not conflict with 00064 * original copyright. 00065 * Nevertheless, many thanks to Daidai for providing his adaption. 00066 * 00067 * Revision 1.7 2006/06/28 17:22:34 haraldkipp 00068 * Make it compile for AT91SAM7X256. 00069 * 00070 * Revision 1.6 2006/03/02 19:43:11 haraldkipp 00071 * Added MCU specific hardware initialization routine. This should be done 00072 * later for all MCUs to avoid contaminating NutInit() with MCU specific 00073 * stuff. For the AT91 the spurious interrupt handler has been added, 00074 * which fixes SF 1440948. 00075 * 00076 * Revision 1.5 2006/02/23 15:34:00 haraldkipp 00077 * Support for Philips LPC2xxx Family and LPC-E2294 Board from Olimex added. 00078 * Many thanks to Michael Fischer for this port. 00079 * 00080 * Revision 1.4 2005/10/24 09:22:29 haraldkipp 00081 * Default idle and main thread stack sizes increased. 00082 * AT91 header file moved. 00083 * 00084 * Revision 1.3 2005/08/02 17:46:45 haraldkipp 00085 * Major API documentation update. 00086 * 00087 * Revision 1.2 2005/07/26 16:17:03 haraldkipp 00088 * Use default stack sizes for main and idle, if none had been defined. 00089 * 00090 * Revision 1.1 2005/05/27 17:16:40 drsung 00091 * Moved the file. 00092 * 00093 * Revision 1.4 2005/04/05 17:52:41 haraldkipp 00094 * Much better implementation of GBA interrupt registration. 00095 * 00096 * Revision 1.3 2004/11/08 18:58:59 haraldkipp 00097 * Configurable stack sizes 00098 * 00099 * Revision 1.2 2004/09/08 10:19:23 haraldkipp 00100 * Made it look more general 00101 * 00102 * Revision 1.1 2004/03/16 16:48:46 haraldkipp 00103 * Added Jan Dubiec's H8/300 port. 00104 * 00105 * 00106 */ 00107 00108 #include <cfg/arch.h> 00109 #include <cfg/memory.h> 00110 #include <cfg/os.h> 00111 #ifdef MCU_GBA 00112 #include <dev/irqreg.h> 00113 #elif defined(MCU_LPC2XXX) 00114 #include <arch/arm/lpc2xxx.h> 00115 #else 00116 #include <arch/arm/at91.h> 00117 #endif 00118 00123 00124 #ifndef NUT_THREAD_MAINSTACK 00125 #define NUT_THREAD_MAINSTACK 1024 00126 #endif 00127 00128 #ifndef NUT_THREAD_IDLESTACK 00129 #define NUT_THREAD_IDLESTACK 512 00130 #endif 00131 00132 #ifdef __CROSSWORKS4ARM__ 00133 extern void *__unused_start__; 00134 /* 00135 * Michael, Why does Crossworks needs this one. Is memory configurable 00136 * with the Configurator? 00137 */ 00138 extern void *__External_SRAM_segment_end__; 00139 00140 #define HEAP_START &__unused_start__ 00141 #define HEAP_SIZE ((uptr_t)(&__External_SRAM_segment_end__ - 1) - (uptr_t)(HEAP_START) - 256) 00142 #else /* GCC */ 00143 00146 #define NUTMEM_END (uptr_t)(NUTMEM_START + NUTMEM_SIZE - 1U) 00147 extern void *__heap_start; 00148 00149 #define HEAP_START &__heap_start 00150 #define HEAP_SIZE ((uptr_t) (NUTMEM_END - 256 - (uptr_t) (&__heap_start))) 00151 #endif 00152 00153 #if !defined(__arm__) && !defined(__cplusplus) 00154 extern void NutAppMain(void *arg) __attribute__ ((noreturn)); 00155 #else 00156 extern void main(void *); 00157 #endif 00158 00159 00160 #if defined(OLIMEX_LPCE2294) 00161 /* 00162 * InitHW for OLIMEX LPC-E2294 00163 */ 00164 static void InitHW (void) 00165 { 00166 PINSEL0 = 0; 00167 PINSEL1 = 0; 00168 00169 BCFG2 = 0x03501; 00170 PINSEL2 |= 0x00804000; 00171 } /* InitHW */ 00172 00173 #endif /* OLIMEX_LPCE2294 */ 00174 00175 00176 00184 THREAD(NutIdle, arg) 00185 { 00186 #if defined(MCU_GBA) || defined(MCU_LPC2XXX) 00187 InitIrqHandler(); 00188 #endif 00189 /* Initialize system timers. */ 00190 NutTimerInit(); 00191 00192 /* Create the main application thread. */ 00193 NutThreadCreate("main", main, 0, NUT_THREAD_MAINSTACK); 00194 00195 /* 00196 * Run in an idle loop at the lowest priority. We can still 00197 * do something useful here, like killing terminated threads 00198 * or putting the CPU into sleep mode. 00199 */ 00200 NutThreadSetPriority(254); 00201 for (;;) { 00202 NutThreadYield(); 00203 NutThreadDestroy(); 00204 } 00205 } 00206 00214 void NutInit(void) 00215 { 00216 #if defined(OLIMEX_LPCE2294) 00217 InitHW(); 00218 #elif defined(MCU_AT91R40008) || defined (MCU_AT91SAM7X256) || defined (MCU_AT91SAM7S256) || defined (MCU_AT91SAM9260) 00219 McuInit(); 00220 #endif 00221 #if defined(MCU_AT91SAM7X256) || defined (MCU_AT91SAM7S256) 00222 { 00223 u_long freq = NutGetCpuClock(); 00224 /* Set Flash Waite state. */ 00225 outr(MC_FMR, ((((freq + freq / 2) / 1000000UL) & 0xFF) << 16) | MC_FWS_2R3W); 00226 } 00227 #endif 00228 00229 NutHeapAdd(HEAP_START, HEAP_SIZE); 00230 00231 /* 00232 * No EEPROM configuration. 00233 */ 00234 strcpy(confos.hostname, "ethernut"); 00235 00236 /* 00237 * Create idle thread 00238 */ 00239 NutThreadCreate("idle", NutIdle, 0, NUT_THREAD_IDLESTACK); 00240 } 00241