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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/include/util/align.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2011,2015 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#ifndef __UTIL_ALIGN_H
#define __UTIL_ALIGN_H
#include <limits.h>
// Return a number >= input that is aligned up to the next x boundary,
// where x is a power of 2.
#define ALIGN_X(u,x) (((u) + ((x)-1)) & ~((x)-1))
// Return a number <= input that is aligned on a x boundary, where x
// is a power of 2.
#define ALIGN_DOWN_X(u,x) ((u) - (u)%(x))
// Useful shortcut macros for 4.
#define ALIGN_4(u) (ALIGN_X(u,4))
#define ALIGN_DOWN_4(u) (ALIGN_DOWN_X(u,4))
// Useful shortcut macros for 8.
#define ALIGN_8(u) (ALIGN_X(u,8))
#define ALIGN_DOWN_8(u) (ALIGN_DOWN_X(u,8))
// Useful shortcut macros for a page.
#define ALIGN_PAGE(u) (ALIGN_X(u,PAGESIZE))
#define ALIGN_PAGE_DOWN(u) (ALIGN_DOWN_X(u,PAGESIZE))
// Useful shortcut macros for a MB.
#define ALIGN_MEGABYTE(u) (ALIGN_X(u,MEGABYTE))
#define ALIGN_MEGABYTE_DOWN(u) (ALIGN_DOWN_X(u,MEGABYTE))
// Returns a number that is aligned to the next highest power of 2 number of
// pages for the given buffer.
#define ALIGN_TO_NEXT_POWER_OF_TWO_PAGES(b) ({\
unsigned int v = ALIGN_PAGE(b)/PAGE_SIZE;\
v--;\
v |= v >> 1;\
v |= v >> 2;\
v |= v >> 4;\
v |= v >> 8;\
v |= v >> 16;\
v++;\
v * PAGE_SIZE;\
})
#endif
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