diff options
Diffstat (limited to 'kernel/arch/frv/include/asm/segment.h')
| -rw-r--r-- | kernel/arch/frv/include/asm/segment.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/kernel/arch/frv/include/asm/segment.h b/kernel/arch/frv/include/asm/segment.h new file mode 100644 index 000000000..4377c89a5 --- /dev/null +++ b/kernel/arch/frv/include/asm/segment.h @@ -0,0 +1,45 @@ +/* segment.h: MMU segment settings + * + * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * 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; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifndef _ASM_SEGMENT_H +#define _ASM_SEGMENT_H + + +#ifndef __ASSEMBLY__ + +typedef struct { + unsigned long seg; +} mm_segment_t; + +#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) + +#ifdef CONFIG_MMU +#define USER_DS MAKE_MM_SEG(TASK_SIZE - 1) +#define KERNEL_DS MAKE_MM_SEG(0xdfffffffUL) +#else +#define USER_DS MAKE_MM_SEG(memory_end) +#define KERNEL_DS MAKE_MM_SEG(0xe0000000UL) +#endif + +#define get_ds() (KERNEL_DS) +#define get_fs() (__current_thread_info->addr_limit) +#define segment_eq(a, b) ((a).seg == (b).seg) +#define __kernel_ds_p() segment_eq(get_fs(), KERNEL_DS) +#define get_addr_limit() (get_fs().seg) + +#define set_fs(_x) \ +do { \ + __current_thread_info->addr_limit = (_x); \ +} while(0) + + +#endif /* __ASSEMBLY__ */ +#endif /* _ASM_SEGMENT_H */ |