| Chris Metcalf | 867e359 | 2010-05-28 23:09:12 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 1999 Gerhard Wichert, Siemens AG |
| 3 | * Gerhard.Wichert@pdb.siemens.de |
| 4 | * Copyright 2010 Tilera Corporation. All Rights Reserved. |
| 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, version 2. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 13 | * NON INFRINGEMENT. See the GNU General Public License for |
| 14 | * more details. |
| 15 | * |
| 16 | * Used in CONFIG_HIGHMEM systems for memory pages which |
| 17 | * are not addressable by direct kernel virtual addresses. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #ifndef _ASM_TILE_HIGHMEM_H |
| 22 | #define _ASM_TILE_HIGHMEM_H |
| 23 | |
| 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/threads.h> |
| 26 | #include <asm/kmap_types.h> |
| 27 | #include <asm/tlbflush.h> |
| 28 | #include <asm/homecache.h> |
| 29 | |
| 30 | /* declarations for highmem.c */ |
| 31 | extern unsigned long highstart_pfn, highend_pfn; |
| 32 | |
| 33 | extern pte_t *pkmap_page_table; |
| 34 | |
| 35 | /* |
| 36 | * Ordering is: |
| 37 | * |
| 38 | * FIXADDR_TOP |
| 39 | * fixed_addresses |
| 40 | * FIXADDR_START |
| 41 | * temp fixed addresses |
| 42 | * FIXADDR_BOOT_START |
| 43 | * Persistent kmap area |
| 44 | * PKMAP_BASE |
| 45 | * VMALLOC_END |
| 46 | * Vmalloc area |
| 47 | * VMALLOC_START |
| 48 | * high_memory |
| 49 | */ |
| 50 | #define LAST_PKMAP_MASK (LAST_PKMAP-1) |
| 51 | #define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT) |
| 52 | #define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) |
| 53 | |
| 54 | void *kmap_high(struct page *page); |
| 55 | void kunmap_high(struct page *page); |
| 56 | void *kmap(struct page *page); |
| 57 | void kunmap(struct page *page); |
| 58 | void *kmap_fix_kpte(struct page *page, int finished); |
| 59 | |
| 60 | /* This macro is used only in map_new_virtual() to map "page". */ |
| 61 | #define kmap_prot page_to_kpgprot(page) |
| 62 | |
| 63 | void kunmap_atomic(void *kvaddr, enum km_type type); |
| 64 | void *kmap_atomic_pfn(unsigned long pfn, enum km_type type); |
| 65 | void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot); |
| 66 | struct page *kmap_atomic_to_page(void *ptr); |
| 67 | void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot); |
| 68 | void *kmap_atomic(struct page *page, enum km_type type); |
| 69 | void kmap_atomic_fix_kpte(struct page *page, int finished); |
| 70 | |
| 71 | #define flush_cache_kmaps() do { } while (0) |
| 72 | |
| 73 | #endif /* _ASM_TILE_HIGHMEM_H */ |