Add the rt linux 4.1.3-rt3 as base

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

diff --git a/kernel/arch/tile/include/asm/fixmap.h b/kernel/arch/tile/include/asm/fixmap.h
new file mode 100644 (file)
index 0000000..ffe2637
--- /dev/null
+++ b/kernel/arch/tile/include/asm/fixmap.h
@@ -0,0 +1,87 @@
+/*
+ * 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 */