/**************************************************************************** * common/up_initialize.c * * Copyright (C) 2007 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name Gregory Nutt nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include "up_arch.h" #include "up_internal.h" /**************************************************************************** * Definitions ****************************************************************************/ /* Define to enable timing loop calibration */ #undef CONFIG_ARM_CALIBRATION /**************************************************************************** * Private Types ****************************************************************************/ /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: up_calibratedelay * * Description: * Delay loops are provided for short timing loops. This function, if * enabled, will just wait for 100 seconds. Using a stopwatch, you can * can then determine if the timing loops are properly calibrated. * ****************************************************************************/ #if defined(CONFIG_ARM_CALIBRATION) & defined(CONFIG_DEBUG) static void up_calibratedelay(void) { int i; lldbg("Beginning 100s delay\n"); for (i = 0; i < 100; i++) { up_mdelay(1000); } lldbg("End 100s delay\n"); } #else # define up_calibratedelay() #endif /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: up_initialize * * Description: * up_initialize will be called once during OS initialization after the * basic OS services have been initialized. The architecture specific * details of initializing the OS will be handled here. Such things as * setting up interrupt service routines, starting the clock, and * registering device drivers are some of the things that are different * for each processor and hardware platform. * * up_initialize is called after the OS initialized but before the user * initialization logic has been started and before the libraries have * been initialized. OS services and driver services are available. * ****************************************************************************/ void up_initialize(void) { /* Initialize global variables */ current_regs = NULL; /* Calibrate the timing loop */ up_calibratedelay(); /* Initialize the interrupt subsystem */ up_irqinitialize(); /* Initialize the system timer interrupt */ #if !defined(CONFIG_SUPPRESS_INTERRUPTS) && !defined(CONFIG_SUPPRESS_TIMER_INTS) up_timerinit(); #endif /* Register devices */ #if CONFIG_NFILE_DESCRIPTORS > 0 devnull_register(); /* Standard /dev/null */ #endif /* Initialize the serial device driver */ up_serialinit(); /* Initialize the netwok */ up_netinitialize(); up_ledon(LED_IRQSENABLED); }