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 1.15 2008/02/15 16:59:27 haraldkipp 00037 * Spport for AT91SAM7SE512 added. 00038 * 00039 * Revision 1.14 2007/10/04 20:08:00 olereinhardt 00040 * Support for SAM7S256 added 00041 * 00042 * Revision 1.13 2006/09/29 12:39:51 haraldkipp 00043 * Spurious interrupt handling on all supported AT91 devices. 00044 * 00045 * Revision 1.12 2006/07/26 11:17:16 haraldkipp 00046 * Defining AT91_PLL_MAINCK will automatically determine SAM7X clock by 00047 * reading PLL settings. 00048 * 00049 * Revision 1.11 2006/07/18 14:04:10 haraldkipp 00050 * Low level hardware initialization moved to crtat91sam7x256_rom.S. This 00051 * avoids the ugly jump from C code back into the runtime initialization. 00052 * Watchdog reset (tiger bell) removed from idle thread. 00053 * 00054 * Revision 1.10 2006/07/15 11:13:30 haraldkipp 00055 * CPU ran into the data pool of Sam7xLowLevelInit(). Temporarily 00056 * fixed by Andras Albert with an additional global label in the 00057 * startup code. Furthermore Andras changed the clock initialization. 00058 * The CPU is now running at 47.9232 MHz and the MAC starts working. 00059 * Great, TCP/IP is now running on the SAM7X. 00060 * 00061 * Revision 1.9 2006/07/10 14:27:03 haraldkipp 00062 * C++ will use main instead of NutAppMain. Contributed by Matthias Wilde. 00063 * 00064 * Revision 1.8 2006/07/05 07:57:52 haraldkipp 00065 * Daidai's support for AT91SAM7X added. Possibly taken from Atmel. 00066 * May require new coding from ground up in order to not conflict with 00067 * original copyright. 00068 * Nevertheless, many thanks to Daidai for providing his adaption. 00069 * 00070 * Revision 1.7 2006/06/28 17:22:34 haraldkipp 00071 * Make it compile for AT91SAM7X256. 00072 * 00073 * Revision 1.6 2006/03/02 19:43:11 haraldkipp 00074 * Added MCU specific hardware initialization routine. This should be done 00075 * later for all MCUs to avoid contaminating NutInit() with MCU specific 00076 * stuff. For the AT91 the spurious interrupt handler has been added, 00077 * which fixes SF 1440948. 00078 * 00079 * Revision 1.5 2006/02/23 15:34:00 haraldkipp 00080 * Support for Philips LPC2xxx Family and LPC-E2294 Board from Olimex added. 00081 * Many thanks to Michael Fischer for this port. 00082 * 00083 * Revision 1.4 2005/10/24 09:22:29 haraldkipp 00084 * Default idle and main thread stack sizes increased. 00085 * AT91 header file moved. 00086 * 00087 * Revision 1.3 2005/08/02 17:46:45 haraldkipp 00088 * Major API documentation update. 00089 * 00090 * Revision 1.2 2005/07/26 16:17:03 haraldkipp 00091 * Use default stack sizes for main and idle, if none had been defined. 00092 * 00093 * Revision 1.1 2005/05/27 17:16:40 drsung 00094 * Moved the file. 00095 * 00096 * Revision 1.4 2005/04/05 17:52:41 haraldkipp 00097 * Much better implementation of GBA interrupt registration. 00098 * 00099 * Revision 1.3 2004/11/08 18:58:59 haraldkipp 00100 * Configurable stack sizes 00101 * 00102 * Revision 1.2 2004/09/08 10:19:23 haraldkipp 00103 * Made it look more general 00104 * 00105 * Revision 1.1 2004/03/16 16:48:46 haraldkipp 00106 * Added Jan Dubiec's H8/300 port. 00107 * 00108 * 00109 */ 00110 00111 #include <cfg/arch.h> 00112 #include <cfg/memory.h> 00113 #include <cfg/os.h> 00114 #ifdef MCU_GBA 00115 #include <dev/irqreg.h> 00116 #elif defined(MCU_LPC2XXX) 00117 #include <arch/arm/lpc2xxx.h> 00118 #else 00119 #include <arch/arm/at91.h> 00120 #endif 00121 00126 00127 #ifndef NUT_THREAD_MAINSTACK 00128 #define NUT_THREAD_MAINSTACK 1024 00129 #endif 00130 00131 #ifndef NUT_THREAD_IDLESTACK 00132 #define NUT_THREAD_IDLESTACK 512 00133 #endif 00134 00135 #ifdef __CROSSWORKS4ARM__ 00136 extern void *__unused_start__; 00137 /* 00138 * Michael, Why does Crossworks needs this one. Is memory configurable 00139 * with the Configurator? 00140 */ 00141 extern void *__External_SRAM_segment_end__; 00142 00143 #define HEAP_START &__unused_start__ 00144 #define HEAP_SIZE ((uptr_t)(&__External_SRAM_segment_end__ - 1) - (uptr_t)(HEAP_START) - 256) 00145 #else /* GCC */ 00146 00149 #define NUTMEM_END (uptr_t)(NUTMEM_START + NUTMEM_SIZE - 1U) 00150 extern void *__heap_start; 00151 00152 #define HEAP_START &__heap_start 00153 #define HEAP_SIZE ((uptr_t) (NUTMEM_END - 256 - (uptr_t) (&__heap_start))) 00154 #endif 00155 00156 #if !defined(__arm__) && !defined(__cplusplus) 00157 extern void NutAppMain(void *arg) __attribute__ ((noreturn)); 00158 #else 00159 extern void main(void *); 00160 #endif 00161 00162 00163 #if defined(OLIMEX_LPCE2294) 00164 /* 00165 * InitHW for OLIMEX LPC-E2294 00166 */ 00167 static void InitHW (void) 00168 { 00169 PINSEL0 = 0; 00170 PINSEL1 = 0; 00171 00172 BCFG2 = 0x03501; 00173 PINSEL2 |= 0x00804000; 00174 } /* InitHW */ 00175 00176 #endif /* OLIMEX_LPCE2294 */ 00177 00178 00179 00187 THREAD(NutIdle, arg) 00188 { 00189 #if defined(MCU_GBA) || defined(MCU_LPC2XXX) 00190 InitIrqHandler(); 00191 #endif 00192 /* Initialize system timers. */ 00193 NutTimerInit(); 00194 00195 /* Create the main application thread. */ 00196 NutThreadCreate("main", main, 0, NUT_THREAD_MAINSTACK); 00197 00198 /* 00199 * Run in an idle loop at the lowest priority. We can still 00200 * do something useful here, like killing terminated threads 00201 * or putting the CPU into sleep mode. 00202 */ 00203 NutThreadSetPriority(254); 00204 for (;;) { 00205 NutThreadYield(); 00206 NutThreadDestroy(); 00207 } 00208 } 00209 00217 void NutInit(void) 00218 { 00219 #if defined(OLIMEX_LPCE2294) 00220 InitHW(); 00221 #elif defined(MCU_AT91R40008) || defined (MCU_AT91SAM7X256) || defined (MCU_AT91SAM7S256) || defined (MCU_AT91SAM9260) || defined(MCU_AT91SAM7SE512) 00222 McuInit(); 00223 #endif 00224 #if defined(MCU_AT91SAM7X256) || defined (MCU_AT91SAM7S256) || defined(MCU_AT91SAM7SE512) 00225 { 00226 u_long freq = NutGetCpuClock(); 00227 /* Set Flash Waite state. */ 00228 outr(MC_FMR, ((((freq + freq / 2) / 1000000UL) & 0xFF) << 16) | MC_FWS_2R3W); 00229 } 00230 #endif 00231 00232 NutHeapAdd(HEAP_START, HEAP_SIZE); 00233 00234 /* 00235 * No EEPROM configuration. 00236 */ 00237 strcpy(confos.hostname, "ethernut"); 00238 00239 /* 00240 * Create idle thread 00241 */ 00242 NutThreadCreate("idle", NutIdle, 0, NUT_THREAD_IDLESTACK); 00243 } 00244