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The files in this directory and elsewhere which refer to this LICENCE
file are part of JFFS2, the Journalling Flash File System v2.

	Copyright © 2001-2007 Red Hat, Inc. and others

JFFS2 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; either version 2 or (at your option) any later 
version.

JFFS2 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.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with JFFS2; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

As a special exception, if other files instantiate templates or use
macros or inline functions from these files, or you compile these
files and link them with other works to produce a work based on these
files, these files do not by themselves cause the resulting work to be
covered by the GNU General Public License. However the source code for
these files must still be made available in accordance with section (3)
of the GNU General Public License.

This exception does not invalidate any other reasons why a work based on
this file might be covered by the GNU General Public License.
span class="cm"> * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1998 Ingo Molnar * * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 * x86_32 and x86_64 integration by Gustavo F. Padovan, February 2009 * Break out common bits to asm-generic by Mark Salter, November 2013 */ #ifndef __ASM_GENERIC_FIXMAP_H #define __ASM_GENERIC_FIXMAP_H #include <linux/bug.h> #define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) #define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT) #ifndef __ASSEMBLY__ /* * 'index to address' translation. If anyone tries to use the idx * directly without translation, we catch the bug with a NULL-deference * kernel oops. Illegal ranges of incoming indices are caught too. */ static __always_inline unsigned long fix_to_virt(const unsigned int idx) { BUILD_BUG_ON(idx >= __end_of_fixed_addresses); return __fix_to_virt(idx); } static inline unsigned long virt_to_fix(const unsigned long vaddr) { BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); return __virt_to_fix(vaddr); } /* * Provide some reasonable defaults for page flags. * Not all architectures use all of these different types and some * architectures use different names. */ #ifndef FIXMAP_PAGE_NORMAL #define FIXMAP_PAGE_NORMAL PAGE_KERNEL #endif #if !defined(FIXMAP_PAGE_RO) && defined(PAGE_KERNEL_RO) #define FIXMAP_PAGE_RO PAGE_KERNEL_RO #endif #ifndef FIXMAP_PAGE_NOCACHE #define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_NOCACHE #endif #ifndef FIXMAP_PAGE_IO #define FIXMAP_PAGE_IO PAGE_KERNEL_IO #endif #ifndef FIXMAP_PAGE_CLEAR #define FIXMAP_PAGE_CLEAR __pgprot(0) #endif #ifndef set_fixmap #define set_fixmap(idx, phys) \ __set_fixmap(idx, phys, FIXMAP_PAGE_NORMAL) #endif #ifndef clear_fixmap #define clear_fixmap(idx) \ __set_fixmap(idx, 0, FIXMAP_PAGE_CLEAR) #endif /* Return a pointer with offset calculated */ #define __set_fixmap_offset(idx, phys, flags) \ ({ \ unsigned long addr; \ __set_fixmap(idx, phys, flags); \ addr = fix_to_virt(idx) + ((phys) & (PAGE_SIZE - 1)); \ addr; \ }) #define set_fixmap_offset(idx, phys) \ __set_fixmap_offset(idx, phys, FIXMAP_PAGE_NORMAL) /* * Some hardware wants to get fixmapped without caching. */ #define set_fixmap_nocache(idx, phys) \ __set_fixmap(idx, phys, FIXMAP_PAGE_NOCACHE) #define set_fixmap_offset_nocache(idx, phys) \ __set_fixmap_offset(idx, phys, FIXMAP_PAGE_NOCACHE) /* * Some fixmaps are for IO */ #define set_fixmap_io(idx, phys) \ __set_fixmap(idx, phys, FIXMAP_PAGE_IO) #define set_fixmap_offset_io(idx, phys) \ __set_fixmap_offset(idx, phys, FIXMAP_PAGE_IO) #endif /* __ASSEMBLY__ */ #endif /* __ASM_GENERIC_FIXMAP_H */