| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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))&(~((typeof(addr))(size)-1))) |
| 26 | #define _ALIGN_DOWN(addr, size) ((addr)&(~((typeof(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 */ |