diff options
Diffstat (limited to 'arch/csky/include/asm/segment.h')
| -rw-r--r-- | arch/csky/include/asm/segment.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/csky/include/asm/segment.h b/arch/csky/include/asm/segment.h new file mode 100644 index 000000000..79ede9b1a --- /dev/null +++ b/arch/csky/include/asm/segment.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. + +#ifndef __ASM_CSKY_SEGMENT_H +#define __ASM_CSKY_SEGMENT_H + +typedef struct { + unsigned long seg; +} mm_segment_t; + +#define KERNEL_DS ((mm_segment_t) { 0xFFFFFFFF }) + +#define USER_DS ((mm_segment_t) { 0x80000000UL }) +#define get_fs() (current_thread_info()->addr_limit) +#define set_fs(x) (current_thread_info()->addr_limit = (x)) +#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg) + +#endif /* __ASM_CSKY_SEGMENT_H */ |