forked from Archive/PX4-Autopilot
123 lines
4.1 KiB
C
123 lines
4.1 KiB
C
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/****************************************************************************
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* arch/arm/include/arch.h
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*
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* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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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/* This file should never be included directed but, rather,
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* only indirectly through nuttx/arch.h
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*/
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#ifndef __ARCH_ARM_INCLUDE_ARCH_H
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#define __ARCH_ARM_INCLUDE_ARCH_H
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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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#ifndef __ASSEMBLY__
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# include <stdint.h>
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#endif
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/****************************************************************************
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* Definitions
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****************************************************************************/
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#ifdef CONFIG_PIC
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/* This identifies the register the is used by the processor as the PIC base
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* register. It is usually r9 or r10
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*/
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#define PIC_REG r10
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#define PIC_REG_STRING "r10"
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/* Macros to get and set the PIC base register. picbase is assumed to be
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* of type (void*) and that it will fit into a uint32_t. These must be
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* inline so that they will be compatible with the ABIs rules for
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* preserving the PIC register
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*/
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#define up_getpicbase(ppicbase) \
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do { \
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uint32_t picbase; \
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__asm__ \
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( \
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"\tmov %0, " PIC_REG_STRING "\n\t" \
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: "=r"(picbase) \
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); \
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*ppicbase = (FAR void*)picbase; \
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} while (0)
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#define up_setpicbase(picbase) \
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do { \
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uint32_t _picbase = (uint32_t)picbase; \
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__asm__ \
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( \
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"\tmov " PIC_REG_STRING ", %0\n\t" \
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: : "r"(_picbase) : PIC_REG_STRING \
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); \
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} while (0)
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#endif
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/****************************************************************************
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* Inline functions
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****************************************************************************/
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ARCH_ARM_INCLUDE_ARCH_H */
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