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Straighten out conditional compilation

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1896 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2009-06-17 21:15:31 +00:00
parent 929bcedfb1
commit 996ac31d58
1 changed files with 36 additions and 1 deletions
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37
arch/arm/include/arch.h
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@ -1,7 +1,7 @@
/****************************************************************************
* arch/arm/include/arch.h
*
* Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
* 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
@ -48,6 +48,41 @@
* Definitions
****************************************************************************/
/* 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. 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 picbase; \
__asm__ \
( \
"\tmov %0, " PIC_REG_STRING "\n\t" \
: "=r"(picbase) \
); \
*ppicbase = (FAR void*)picbase; \
} while (0)
#define up_setpicbase(picbase) \
do { \
uint32 _picbase = (uint32)picbase; \
__asm__ \
( \
"\tmov " PIC_REG_STRING ", %0\n\t" \
: : "r"(_picbase) : PIC_REG_STRING \
); \
} while (0)
/****************************************************************************
* Inline functions
****************************************************************************/