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author | Stephen Rothwell <sfr@canb.auug.org.au> | 2010-06-21 11:20:32 +1000 |
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committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2010-06-21 11:20:32 +1000 |
commit | c04810a49db188c7d2771de7e07a3499d488e288 (patch) | |
tree | f14a3db5a8d6f8995fc394d98a5e71e2d9633bf3 /arch/tile/include/asm/highmem.h | |
parent | b6944c263198762568de1b552ca54e3a447cf8fc (diff) | |
parent | 139ef32b0e6b88b00b5e3e74d052d938f178dc9b (diff) |
Merge remote branch 'tile/master'
Diffstat (limited to 'arch/tile/include/asm/highmem.h')
-rw-r--r-- | arch/tile/include/asm/highmem.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/tile/include/asm/highmem.h b/arch/tile/include/asm/highmem.h new file mode 100644 index 000000000000..efdd12e91020 --- /dev/null +++ b/arch/tile/include/asm/highmem.h @@ -0,0 +1,73 @@ +/* + * Copyright (C) 1999 Gerhard Wichert, Siemens AG + * Gerhard.Wichert@pdb.siemens.de + * 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. + * + * Used in CONFIG_HIGHMEM systems for memory pages which + * are not addressable by direct kernel virtual addresses. + * + */ + +#ifndef _ASM_TILE_HIGHMEM_H +#define _ASM_TILE_HIGHMEM_H + +#include <linux/interrupt.h> +#include <linux/threads.h> +#include <asm/kmap_types.h> +#include <asm/tlbflush.h> +#include <asm/homecache.h> + +/* declarations for highmem.c */ +extern unsigned long highstart_pfn, highend_pfn; + +extern pte_t *pkmap_page_table; + +/* + * Ordering is: + * + * FIXADDR_TOP + * fixed_addresses + * FIXADDR_START + * temp fixed addresses + * FIXADDR_BOOT_START + * Persistent kmap area + * PKMAP_BASE + * VMALLOC_END + * Vmalloc area + * VMALLOC_START + * high_memory + */ +#define LAST_PKMAP_MASK (LAST_PKMAP-1) +#define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT) +#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) + +void *kmap_high(struct page *page); +void kunmap_high(struct page *page); +void *kmap(struct page *page); +void kunmap(struct page *page); +void *kmap_fix_kpte(struct page *page, int finished); + +/* This macro is used only in map_new_virtual() to map "page". */ +#define kmap_prot page_to_kpgprot(page) + +void kunmap_atomic(void *kvaddr, enum km_type type); +void *kmap_atomic_pfn(unsigned long pfn, enum km_type type); +void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot); +struct page *kmap_atomic_to_page(void *ptr); +void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot); +void *kmap_atomic(struct page *page, enum km_type type); +void kmap_atomic_fix_kpte(struct page *page, int finished); + +#define flush_cache_kmaps() do { } while (0) + +#endif /* _ASM_TILE_HIGHMEM_H */ |