1/*
2 * include/asm-v850/current.h -- Current task
3 *
4 *  Copyright (C) 2001,02  NEC Corporation
5 *  Copyright (C) 2001,02  Miles Bader <miles@gnu.org>
6 *
7 * This file is subject to the terms and conditions of the GNU General
8 * Public License.  See the file COPYING in the main directory of this
9 * archive for more details.
10 *
11 * Written by Miles Bader <miles@gnu.org>
12 */
13
14#ifndef __V850_CURRENT_H__
15#define __V850_CURRENT_H__
16
17#ifndef __ASSEMBLY__     /* <linux/thread_info.h> is not asm-safe.  */
18#include <linux/thread_info.h>
19#endif
20
21#include <asm/macrology.h>
22
23
24/* Register used to hold the current task pointer while in the kernel.
25   Any `call clobbered' register without a special meaning should be OK,
26   but check asm/v850/kernel/entry.S to be sure.  */
27#define CURRENT_TASK_REGNUM	16
28#define CURRENT_TASK 		macrology_paste (r, CURRENT_TASK_REGNUM)
29
30
31#ifdef __ASSEMBLY__
32
33/* Put a pointer to the current task structure into REG.  */
34#define GET_CURRENT_TASK(reg)						\
35	GET_CURRENT_THREAD(reg);					\
36	ld.w	TI_TASK[reg], reg
37
38#else /* !__ASSEMBLY__ */
39
40/* A pointer to the current task.  */
41register struct task_struct *current					\
42   __asm__ (macrology_stringify (CURRENT_TASK));
43
44#endif /* __ASSEMBLY__ */
45
46
47#endif /* _V850_CURRENT_H */
48