From 4b87d7a4f91d31f186b9d03434f800863aaf16d2 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Fri, 27 Mar 2009 14:25:30 +0100 Subject: microblaze_v8: page.h, segment.h, unaligned.h Reviewed-by: Ingo Molnar Acked-by: John Linn Acked-by: Stephen Neuendorffer Acked-by: John Williams Signed-off-by: Michal Simek --- arch/microblaze/include/asm/segment.h | 43 +++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 arch/microblaze/include/asm/segment.h (limited to 'arch/microblaze/include/asm/segment.h') diff --git a/arch/microblaze/include/asm/segment.h b/arch/microblaze/include/asm/segment.h new file mode 100644 index 000000000000..7f5dcc56eea1 --- /dev/null +++ b/arch/microblaze/include/asm/segment.h @@ -0,0 +1,43 @@ +/* + * Copyright (C) 2008 Michal Simek + * Copyright (C) 2008 PetaLogix + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#ifndef _ASM_MICROBLAZE_SEGMENT_H +#define _ASM_MICROBLAZE_SEGMENT_H + +#ifndef __ASSEMBLY__ + +typedef struct { + unsigned long seg; +} mm_segment_t; + +/* + * On Microblaze the fs value is actually the top of the corresponding + * address space. + * + * The fs value determines whether argument validity checking should be + * performed or not. If get_fs() == USER_DS, checking is performed, with + * get_fs() == KERNEL_DS, checking is bypassed. + * + * For historical reasons, these macros are grossly misnamed. + * + * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal. + */ +# define KERNEL_DS ((mm_segment_t){0}) +# define USER_DS KERNEL_DS + +# define get_ds() (KERNEL_DS) +# define get_fs() (current_thread_info()->addr_limit) +# define set_fs(x) \ + do { current_thread_info()->addr_limit = (x); } while (0) + +# define segment_eq(a, b) ((a).seg == (b).seg) + +# endif /* __ASSEMBLY__ */ +#endif /* _ASM_MICROBLAZE_SEGMENT_H */ -- cgit v1.2.3-59-g8ed1b