arch/powerpc/boot/page.h

   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 */