diff options
Diffstat (limited to 'include/asm-v850/current.h')
| -rw-r--r-- | include/asm-v850/current.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/asm-v850/current.h b/include/asm-v850/current.h new file mode 100644 index 000000000000..30aae5673770 --- /dev/null +++ b/include/asm-v850/current.h @@ -0,0 +1,47 @@ +/* + * include/asm-v850/current.h -- Current task + * + * Copyright (C) 2001,02 NEC Corporation + * Copyright (C) 2001,02 Miles Bader <miles@gnu.org> + * + * 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. + * + * Written by Miles Bader <miles@gnu.org> + */ + +#ifndef __V850_CURRENT_H__ +#define __V850_CURRENT_H__ + +#ifndef __ASSEMBLY__ /* <linux/thread_info.h> is not asm-safe. */ +#include <linux/thread_info.h> +#endif + +#include <asm/macrology.h> + + +/* Register used to hold the current task pointer while in the kernel. + Any `call clobbered' register without a special meaning should be OK, + but check asm/v850/kernel/entry.S to be sure. */ +#define CURRENT_TASK_REGNUM 16 +#define CURRENT_TASK macrology_paste (r, CURRENT_TASK_REGNUM) + + +#ifdef __ASSEMBLY__ + +/* Put a pointer to the current task structure into REG. */ +#define GET_CURRENT_TASK(reg) \ + GET_CURRENT_THREAD(reg); \ + ld.w TI_TASK[reg], reg + +#else /* !__ASSEMBLY__ */ + +/* A pointer to the current task. */ +register struct task_struct *current \ + __asm__ (macrology_stringify (CURRENT_TASK)); + +#endif /* __ASSEMBLY__ */ + + +#endif /* _V850_CURRENT_H */ |