| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. */ |
| 41 | register struct task_struct *current \ |
| 42 | __asm__ (macrology_stringify (CURRENT_TASK)); |
| 43 | |
| 44 | #endif /* __ASSEMBLY__ */ |
| 45 | |
| 46 | |
| 47 | #endif /* _V850_CURRENT_H */ |