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Diffstat (limited to 'nuttx/arch/arm/include/arch.h')
-rw-r--r-- | nuttx/arch/arm/include/arch.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/nuttx/arch/arm/include/arch.h b/nuttx/arch/arm/include/arch.h new file mode 100644 index 000000000..dd750ad77 --- /dev/null +++ b/nuttx/arch/arm/include/arch.h @@ -0,0 +1,122 @@ +/**************************************************************************** + * arch/arm/include/arch.h + * + * 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. + * + ****************************************************************************/ + +/* This file should never be included directed but, rather, + * only indirectly through nuttx/arch.h + */ + +#ifndef __ARCH_ARM_INCLUDE_ARCH_H +#define __ARCH_ARM_INCLUDE_ARCH_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#ifndef __ASSEMBLY__ +# include <stdint.h> +#endif + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +#ifdef CONFIG_PIC + +/* This identifies the register the is used by the processor as the PIC base + * register. It is usually r9 or r10 + */ + +#define PIC_REG r10 +#define PIC_REG_STRING "r10" + +/* Macros to get and set the PIC base register. picbase is assumed to be + * of type (void*) and that it will fit into a uint32_t. These must be + * inline so that they will be compatible with the ABIs rules for + * preserving the PIC register + */ + +#define up_getpicbase(ppicbase) \ +do { \ + uint32_t picbase; \ + __asm__ \ + ( \ + "\tmov %0, " PIC_REG_STRING "\n\t" \ + : "=r"(picbase) \ + ); \ + *ppicbase = (FAR void*)picbase; \ +} while (0) + +#define up_setpicbase(picbase) \ +do { \ + uint32_t _picbase = (uint32_t)picbase; \ + __asm__ \ + ( \ + "\tmov " PIC_REG_STRING ", %0\n\t" \ + : : "r"(_picbase) : PIC_REG_STRING \ + ); \ +} while (0) + +#endif + +/**************************************************************************** + * Inline functions + ****************************************************************************/ + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __ARCH_ARM_INCLUDE_ARCH_H */ |