/* * 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__ */