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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-02-25 00:00:04 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-02-25 00:00:04 +0000 |
commit | d7ddd75cbe92d10263edaf505f8569834bf35c6a (patch) | |
tree | 5f1bac04b8133a21c03def9848976a706eb790b3 /nuttx/arch/8051/src/up_initialize.c | |
parent | 44187dc0498e6733e17c0851a02593079b62e561 (diff) | |
download | px4-nuttx-d7ddd75cbe92d10263edaf505f8569834bf35c6a.tar.gz px4-nuttx-d7ddd75cbe92d10263edaf505f8569834bf35c6a.tar.bz2 px4-nuttx-d7ddd75cbe92d10263edaf505f8569834bf35c6a.zip |
Rename arch/pjrc-8051 to arch/8051
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3315 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/8051/src/up_initialize.c')
-rw-r--r-- | nuttx/arch/8051/src/up_initialize.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/nuttx/arch/8051/src/up_initialize.c b/nuttx/arch/8051/src/up_initialize.c new file mode 100644 index 000000000..3f0bc4027 --- /dev/null +++ b/nuttx/arch/8051/src/up_initialize.c @@ -0,0 +1,144 @@ +/************************************************************************ + * up_initialize.c + * + * Copyright (C) 2007, 2009 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 <stdint.h> + +#include <nuttx/arch.h> +#include <nuttx/fs.h> + +#include "up_internal.h" + +/************************************************************************ + * Private Definitions + ************************************************************************/ + +/************************************************************************ + * Private Data + ************************************************************************/ + +/* This is the top of the stack containing the interrupt + * stack frame. It is set when processing an interrupt. It + * is also cleared when the interrupt returns so this can + * also be used like a boolean indication that we are in an + * interrupt. + */ + +uint8_t g_irqtos; + +/* Registers are saved in the following global array during + * interrupt processing. If a context switch is performed + * during the interrupt handling, these registers will be + * copied into the TCB again (NOTE: We could save a copy + * if the interrupt handling logic saved the registers + * directly into (_TCB*)g_readytorun.head->xcp.regs). + */ + +uint8_t g_irqregs[REGS_SIZE]; + +/* If during execution of an interrup handler, a context + * switch must be performed, the follwing will be set to + * to that address of the relevant context structure. The + * actual switch will be deferred until the time that the + * the interrupt exits. + */ + +FAR struct xcptcontext *g_irqcontext; + +/* It is faster to look up 8-bit shifts in this table than + * to comput them. + */ + +const uint8_t g_ntobit[8] = + { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }; + +/************************************************************************ + * Private Functions + ************************************************************************/ + +/************************************************************************ + * 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 init process has been started and before the + * libraries have been initialized. OS services and driver + * services are available. + * + ************************************************************************/ + +void up_initialize(void) +{ + /* Initialize global variables */ + + g_irqtos = 0; + + /* 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 */ + +#ifndef CONFIG_SUPPRESS_INTERRUPTS + up_timerinit(); +#endif + + up_ledon(LED_IRQSENABLED); +} + |