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author | James Morris <jmorris@namei.org> | 2009-05-08 11:56:47 +0400 |
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committer | James Morris <jmorris@namei.org> | 2009-05-08 11:56:47 +0400 |
commit | d254117099d711f215e62427f55dfb8ebd5ad011 (patch) | |
tree | 0848ff8dd74314fec14a86497f8d288c86ba7c65 /arch/microblaze/include/asm/segment.h | |
parent | 07ff7a0b187f3951788f64ae1f30e8109bc8e9eb (diff) | |
parent | 8c9ed899b44c19e81859fbb0e9d659fe2f8630fc (diff) | |
download | linux-d254117099d711f215e62427f55dfb8ebd5ad011.tar.xz |
Merge branch 'master' into next
Diffstat (limited to 'arch/microblaze/include/asm/segment.h')
-rw-r--r-- | arch/microblaze/include/asm/segment.h | 43 |
1 files changed, 43 insertions, 0 deletions
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 */ |