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score: New routines to align addresses up or down.

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Gedare Bloom
2013-02-12 10:20:51 -05:00
parent 9a2ead0246
commit a24bd4696a
1 changed files with 44 additions and 0 deletions
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44
cpukit/score/inline/rtems/score/address.inl
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@@ -142,6 +142,50 @@ RTEMS_INLINE_ROUTINE bool _Addresses_Is_in_range (
return (address >= base && address <= limit);
}
/**
* @brief Align address to nearest multiple of alignment, rounding up.
*
* This function returns the given address aligned to the given alignment.
* If the address already is aligned, or if alignment is 0, the address is
* returned as is. The returned address is greater than or equal to the
* given address.
*
* @param[in] address is the address to align.
* @param[in] alignment is the boundary for alignment and must be a power of 2
*
* @return Returns the aligned address.
*/
RTEMS_INLINE_ROUTINE void *_Addresses_Align_up(
void *address,
size_t alignment
)
{
uintptr_t mask = alignment - (uintptr_t)1;
return (void*)(((uintptr_t)address + mask) & ~mask);
}
/**
* @brief Align address to nearest multiple of alignment, truncating.
*
* This function returns the given address aligned to the given alignment.
* If the address already is aligned, or if alignment is 0, the address is
* returned as is. The returned address is less than or equal to the
* given address.
*
* @param[in] address is the address to align.
* @param[in] alignment is the boundary for alignment and must be a power of 2.
*
* @return Returns the aligned address.
*/
RTEMS_INLINE_ROUTINE void *_Addresses_Align_down(
void *address,
size_t alignment
)
{
uintptr_t mask = alignment - (uintptr_t)1;
return (void*)((uintptr_t)address & ~mask);
}
/** @} */
#endif