| /* | |
| * Copyright (C) 1998 Ingo Molnar | |
| * Copyright 2010 Tilera Corporation. All Rights Reserved. | |
| * | |
| * This program is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU General Public License | |
| * as published by the Free Software Foundation, version 2. | |
| * | |
| * This program is distributed in the hope that it will be useful, but | |
| * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
| * NON INFRINGEMENT. See the GNU General Public License for | |
| * more details. | |
| */ | |
| #ifndef _ASM_TILE_FIXMAP_H | |
| #define _ASM_TILE_FIXMAP_H | |
| #include <asm/page.h> | |
| #ifndef __ASSEMBLY__ | |
| #include <linux/kernel.h> | |
| #ifdef CONFIG_HIGHMEM | |
| #include <linux/threads.h> | |
| #include <asm/kmap_types.h> | |
| #endif | |
| /* | |
| * Here we define all the compile-time 'special' virtual | |
| * addresses. The point is to have a constant address at | |
| * compile time, but to set the physical address only | |
| * in the boot process. We allocate these special addresses | |
| * from the end of supervisor virtual memory backwards. | |
| * Also this lets us do fail-safe vmalloc(), we | |
| * can guarantee that these special addresses and | |
| * vmalloc()-ed addresses never overlap. | |
| * | |
| * these 'compile-time allocated' memory buffers are | |
| * fixed-size 4k pages. (or larger if used with an increment | |
| * higher than 1) use fixmap_set(idx,phys) to associate | |
| * physical memory with fixmap indices. | |
| * | |
| * TLB entries of such buffers will not be flushed across | |
| * task switches. | |
| */ | |
| enum fixed_addresses { | |
| #ifdef __tilegx__ | |
| /* | |
| * TILEPro has unmapped memory above so the hole isn't needed, | |
| * and in any case the hole pushes us over a single 16MB pmd. | |
| */ | |
| FIX_HOLE, | |
| #endif | |
| #ifdef CONFIG_HIGHMEM | |
| FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */ | |
| FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1, | |
| #endif | |
| #ifdef __tilegx__ /* see homecache.c */ | |
| FIX_HOMECACHE_BEGIN, | |
| FIX_HOMECACHE_END = FIX_HOMECACHE_BEGIN+(NR_CPUS)-1, | |
| #endif | |
| __end_of_permanent_fixed_addresses, | |
| /* | |
| * Temporary boot-time mappings, used before ioremap() is functional. | |
| * Not currently needed by the Tile architecture. | |
| */ | |
| #define NR_FIX_BTMAPS 0 | |
| #if NR_FIX_BTMAPS | |
| FIX_BTMAP_END = __end_of_permanent_fixed_addresses, | |
| FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS - 1, | |
| __end_of_fixed_addresses | |
| #else | |
| __end_of_fixed_addresses = __end_of_permanent_fixed_addresses | |
| #endif | |
| }; | |
| #define __FIXADDR_SIZE (__end_of_permanent_fixed_addresses << PAGE_SHIFT) | |
| #define __FIXADDR_BOOT_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) | |
| #define FIXADDR_START (FIXADDR_TOP + PAGE_SIZE - __FIXADDR_SIZE) | |
| #define FIXADDR_BOOT_START (FIXADDR_TOP + PAGE_SIZE - __FIXADDR_BOOT_SIZE) | |
| #include <asm-generic/fixmap.h> | |
| #endif /* !__ASSEMBLY__ */ | |
| #endif /* _ASM_TILE_FIXMAP_H */ |