| /* |
| * 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 */ |