|
|
/****************************************************************************
* arch/sh/src/common/up_initialize.c
*
* Copyright (C) 2008-2010, 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 NuttX 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 <nuttx/config.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/fs/fs.h>
#include <nuttx/ramlog.h>
#include "up_arch.h"
#include "up_internal.h"
/****************************************************************************
* Definitions
****************************************************************************/
/* Define to enable timing loop calibration */
#undef CONFIG_ARCH_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_ARCH_CALIBRATION) & defined(CONFIG_DEBUG)
static void up_calibratedelay(void)
{
int i;
slldbg("Beginning 100s delay\n");
for (i = 0; i < 100; i++)
{
up_mdelay(1000);
}
slldbg("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 console device driver. NOTE that the naming
* implies that the console is a serial driver. That is usually the case,
* however, if no UARTs are enabled, the console could als be provided
* through some other device, such as an LCD. Architecture-specific logic
* will have to detect that case.
*/
#if defined(USE_SERIALDRIVER)
up_consoleinit();
#elif defined(CONFIG_DEV_LOWCONSOLE)
lowconsole_init();
#elif defined(CONFIG_RAMLOG_CONSOLE)
ramlog_consoleinit();
#endif
/* Initialize the system logging device */
#ifdef CONFIG_SYSLOG_CHAR
syslog_initialize();
#endif
#ifdef CONFIG_RAMLOG_SYSLOG
ramlog_sysloginit();
#endif
/* Initialize the netwok */
up_netinitialize();
/* Initialize USB */
up_usbinitialize();
up_ledon(LED_IRQSENABLED);
}
|
