1 #ifndef _PPC_BOOT_PAGE_H 2 #define _PPC_BOOT_PAGE_H 3 /* 4 * Copyright (C) 2001 PPC64 Team, IBM Corp 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #ifdef __ASSEMBLY__ 13 #define ASM_CONST(x) x 14 #else 15 #define __ASM_CONST(x) x##UL 16 #define ASM_CONST(x) __ASM_CONST(x) 17 #endif 18 19 /* PAGE_SHIFT determines the page size */ 20 #define PAGE_SHIFT 12 21 #define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) 22 #define PAGE_MASK (~(PAGE_SIZE-1)) 23 24 /* align addr on a size boundary - adjust address up/down if needed */ 25 #define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1))) 26 #define _ALIGN_DOWN(addr,size) ((addr)&(~((size)-1))) 27 28 /* align addr on a size boundary - adjust address up if needed */ 29 #define _ALIGN(addr,size) _ALIGN_UP(addr,size) 30 31 /* to align the pointer to the (next) page boundary */ 32 #define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE) 33 34 #endif /* _PPC_BOOT_PAGE_H */ 35