linux/arch/powerpc/boot/page.h
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   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2#ifndef _PPC_BOOT_PAGE_H
   3#define _PPC_BOOT_PAGE_H
   4/*
   5 * Copyright (C) 2001 PPC64 Team, IBM Corp
   6 */
   7
   8#ifdef __ASSEMBLY__
   9#define ASM_CONST(x) x
  10#else
  11#define __ASM_CONST(x) x##UL
  12#define ASM_CONST(x) __ASM_CONST(x)
  13#endif
  14
  15/* PAGE_SHIFT determines the page size */
  16#define PAGE_SHIFT      12
  17#define PAGE_SIZE       (ASM_CONST(1) << PAGE_SHIFT)
  18#define PAGE_MASK       (~(PAGE_SIZE-1))
  19
  20/* align addr on a size boundary - adjust address up/down if needed */
  21#define _ALIGN_UP(addr, size)   (((addr)+((size)-1))&(~((typeof(addr))(size)-1)))
  22#define _ALIGN_DOWN(addr, size) ((addr)&(~((typeof(addr))(size)-1)))
  23
  24/* align addr on a size boundary - adjust address up if needed */
  25#define _ALIGN(addr,size)     _ALIGN_UP(addr,size)
  26
  27/* to align the pointer to the (next) page boundary */
  28#define PAGE_ALIGN(addr)        _ALIGN(addr, PAGE_SIZE)
  29
  30#endif                          /* _PPC_BOOT_PAGE_H */
  31
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