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Diffstat (limited to 'nuttx/arch/z16/src/common/up_initialize.c')
-rw-r--r-- | nuttx/arch/z16/src/common/up_initialize.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/nuttx/arch/z16/src/common/up_initialize.c b/nuttx/arch/z16/src/common/up_initialize.c new file mode 100644 index 000000000..0f54beb4f --- /dev/null +++ b/nuttx/arch/z16/src/common/up_initialize.c @@ -0,0 +1,169 @@ +/**************************************************************************** + * common/up_initialize.c + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <sys/types.h> +#include <debug.h> + +#include <nuttx/arch.h> +#include <nuttx/fs.h> +#include <nuttx/mm.h> +#include <arch/board/board.h> + +#include "up_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/* Define to enable timing loop calibration */ + +#undef CONFIG_ARCH_CALIBRATION + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/* This holds a references to the current interrupt level + * register storage structure. If is non-NULL only during + * interrupt processing. + */ + +chipreg_t *current_regs; + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * 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; + 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(); + + /* Add extra memory fragments to the memory manager */ + +#if CONFIG_MM_REGIONS > 1 + up_addregion(); +#endif + + /* 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); +} |