Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / tile / include / asm / highmem.h

diff --git a/kernel/arch/tile/include/asm/highmem.h b/kernel/arch/tile/include/asm/highmem.h
new file mode 100644 (file)
index 0000000..fc8429a
--- /dev/null
+++ b/kernel/arch/tile/include/asm/highmem.h
@@ -0,0 +1,72 @@
+/*
+ * 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/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 *kmap_atomic(struct page *page);
+void __kunmap_atomic(void *kvaddr);
+void *kmap_atomic_pfn(unsigned long pfn);
+void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot);
+struct page *kmap_atomic_to_page(void *ptr);
+void *kmap_atomic_prot(struct page *page, pgprot_t prot);
+void kmap_atomic_fix_kpte(struct page *page, int finished);
+
+#define flush_cache_kmaps()    do { } while (0)
+
+#endif /* _ASM_TILE_HIGHMEM_H */