mirror of
https://github.com/torvalds/linux.git
synced 2024-11-05 11:32:04 +00:00
f5a61d0c13
{get,put}_thread_info() were introduced in 2.5.4 and never
had been called by anything in the tree.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/*
|
|
* include/asm-v850/thread_info.h -- v850 low-level thread information
|
|
*
|
|
* Copyright (C) 2002 NEC Corporation
|
|
* Copyright (C) 2002 Miles Bader <miles@gnu.org>
|
|
* Copyright (C) 2002 David Howells (dhowells@redhat.com)
|
|
* - Incorporating suggestions made by Linus Torvalds and Dave Miller
|
|
*
|
|
* 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.
|
|
*
|
|
* This file was derived from the PPC version, include/asm-ppc/thread_info.h
|
|
* which was adapted from the i386 version by Paul Mackerras
|
|
*/
|
|
|
|
#ifndef __V850_THREAD_INFO_H__
|
|
#define __V850_THREAD_INFO_H__
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/*
|
|
* low level task data.
|
|
* If you change this, change the TI_* offsets below to match.
|
|
*/
|
|
struct thread_info {
|
|
struct task_struct *task; /* main task structure */
|
|
struct exec_domain *exec_domain; /* execution domain */
|
|
unsigned long flags; /* low level flags */
|
|
int cpu; /* cpu we're on */
|
|
int preempt_count; /* 0 => preemptable,
|
|
<0 => BUG */
|
|
struct restart_block restart_block;
|
|
};
|
|
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task = &tsk, \
|
|
.exec_domain = &default_exec_domain, \
|
|
.flags = 0, \
|
|
.cpu = 0, \
|
|
.preempt_count = 1, \
|
|
.restart_block = { \
|
|
.fn = do_no_restart_syscall, \
|
|
}, \
|
|
}
|
|
|
|
#define init_thread_info (init_thread_union.thread_info)
|
|
#define init_stack (init_thread_union.stack)
|
|
|
|
/*
|
|
* macros/functions for gaining access to the thread information structure
|
|
*/
|
|
|
|
/* thread information allocation */
|
|
#define alloc_thread_info(tsk) ((struct thread_info *) \
|
|
__get_free_pages(GFP_KERNEL, 1))
|
|
#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
|
|
/*
|
|
* Offsets in thread_info structure, used in assembly code
|
|
*/
|
|
#define TI_TASK 0
|
|
#define TI_EXECDOMAIN 4
|
|
#define TI_FLAGS 8
|
|
#define TI_CPU 12
|
|
#define TI_PREEMPT 16
|
|
|
|
#define PREEMPT_ACTIVE 0x4000000
|
|
|
|
/*
|
|
* thread information flag bit numbers
|
|
*/
|
|
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
|
#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
|
|
#define TIF_SIGPENDING 2 /* signal pending */
|
|
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
|
|
#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
|
|
TIF_NEED_RESCHED */
|
|
#define TIF_MEMDIE 5
|
|
|
|
/* as above, but as bit values */
|
|
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
|
|
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
|
|
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
|
|
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
|
|
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
|
|
|
|
|
|
/* Size of kernel stack for each process. */
|
|
#define THREAD_SIZE 0x2000
|
|
|
|
/* The alignment of kernel threads, with thread_info structures at their
|
|
base. Thus, a pointer for a task's task structure can be derived from
|
|
its kernel stack pointer. */
|
|
#define THREAD_ALIGNMENT THREAD_SIZE
|
|
#define THREAD_MASK (-THREAD_ALIGNMENT)
|
|
|
|
|
|
#ifdef __ASSEMBLY__
|
|
|
|
/* Put a pointer to the current thread_info structure into REG. Note that
|
|
this definition requires THREAD_MASK to be representable as a signed
|
|
16-bit value. */
|
|
#define GET_CURRENT_THREAD(reg) \
|
|
/* Use `addi' and then `and' instead of just `andi', because \
|
|
`addi' sign-extends the immediate value, whereas `andi' \
|
|
zero-extends it. */ \
|
|
addi THREAD_MASK, r0, reg; \
|
|
and sp, reg
|
|
|
|
#else
|
|
|
|
/* Return a pointer to the current thread_info structure. */
|
|
static inline struct thread_info *current_thread_info (void)
|
|
{
|
|
register unsigned long sp __asm__ ("sp");
|
|
return (struct thread_info *)(sp & THREAD_MASK);
|
|
}
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __V850_THREAD_INFO_H__ */
|