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122 lines
4.1 KiB
122 lines
4.1 KiB
/**************************************************************************** |
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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 <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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/* 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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