9a4abde74a
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2915 42af7a65-404d-4744-a932-0658087f49c3
170 lines
5.4 KiB
C
170 lines
5.4 KiB
C
/****************************************************************************
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* arch/arm/src/common/up_initialize.c
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*
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* Copyright (C) 2007-2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/fs.h>
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#include <arch/board/board.h>
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#include "up_arch.h"
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#include "up_internal.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_calibratedelay
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*
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* Description:
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* Delay loops are provided for short timing loops. This function, if
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* enabled, will just wait for 100 seconds. Using a stopwatch, you can
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* can then determine if the timing loops are properly calibrated.
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*
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****************************************************************************/
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#if defined(CONFIG_ARCH_CALIBRATION) && defined(CONFIG_DEBUG)
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static void up_calibratedelay(void)
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{
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int i;
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lldbg("Beginning 100s delay\n");
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for (i = 0; i < 100; i++)
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{
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up_mdelay(1000);
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}
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lldbg("End 100s delay\n");
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}
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#else
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# define up_calibratedelay()
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_initialize
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*
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* Description:
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* up_initialize will be called once during OS initialization after the
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* basic OS services have been initialized. The architecture specific
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* details of initializing the OS will be handled here. Such things as
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* setting up interrupt service routines, starting the clock, and
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* registering device drivers are some of the things that are different
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* for each processor and hardware platform.
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*
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* up_initialize is called after the OS initialized but before the user
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* initialization logic has been started and before the libraries have
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* been initialized. OS services and driver services are available.
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*
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****************************************************************************/
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void up_initialize(void)
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{
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/* Initialize global variables */
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current_regs = NULL;
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/* Calibrate the timing loop */
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up_calibratedelay();
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/* Add any extra memory fragments to the memory manager */
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up_addregion();
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/* Initialize the interrupt subsystem */
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up_irqinitialize();
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/* Initialize the DMA subsystem if the weak function stm32_dmainitialize has been
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* brought into the build
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*/
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#ifdef CONFIG_ARCH_DMA
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#ifdef CONFIG_HAVE_WEAKFUNCTIONS
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if (up_dmainitialize)
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#endif
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{
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up_dmainitialize();
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}
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#endif
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/* Initialize the system timer interrupt */
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#if !defined(CONFIG_SUPPRESS_INTERRUPTS) && !defined(CONFIG_SUPPRESS_TIMER_INTS)
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up_timerinit();
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#endif
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/* Register devices */
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#if CONFIG_NFILE_DESCRIPTORS > 0
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devnull_register(); /* Standard /dev/null */
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#endif
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/* Initialize the serial device driver */
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#ifdef CONFIG_USE_SERIALDRIVER
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up_serialinit();
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#elif defined(CONFIG_DEV_LOWCONSOLE)
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lowconsole_init();
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#endif
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/* Initialize the netwok */
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up_netinitialize();
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/* Initialize USB */
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up_usbinitialize();
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up_ledon(LED_IRQSENABLED);
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}
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