/* *  linux/include/asm-arm/thread_info.h * *  Copyright (C) 2002 Russell King. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */#ifndef __ASM_ARM_THREAD_INFO_H#define __ASM_ARM_THREAD_INFO_H #ifdef __KERNEL__ #include <linux/compiler.h>#include <asm/fpstate.h> #define THREAD_SIZE_ORDER	1#define THREAD_SIZE		8192#define THREAD_START_SP		(THREAD_SIZE - 8) #ifndef __ASSEMBLY__ struct task_struct;struct exec_domain; #include <asm/ptrace.h>#include <asm/types.h>#include <asm/domain.h> typedef unsigned long mm_segment_t; struct cpu_context_save {	__u32	r4;	__u32	r5;	__u32	r6;	__u32	r7;	__u32	r8;	__u32	r9;	__u32	sl;	__u32	fp;	__u32	sp;	__u32	pc;	__u32	extra[2];		/* Xscale 'acc' register, etc */}; /* * low level task data that entry.S needs immediate access to. * __switch_to() assumes cpu_context follows immediately after cpu_domain. */struct thread_info {	unsigned long		flags;		/* low level flags */	int			preempt_count;	/* 0 => preemptable, <0 => bug */	mm_segment_t		addr_limit;	/* address limit */	struct task_struct	*task;		/* main task structure */	struct exec_domain	*exec_domain;	/* execution domain */	__u32			cpu;		/* cpu */	__u32			cpu_domain;	/* cpu domain */	struct cpu_context_save	cpu_context;	/* cpu context */	__u8			used_cp[16];	/* thread used copro */	unsigned long		tp_value;	union fp_state		fpstate __attribute__((aligned(8)));	union vfp_state		vfpstate;	struct restart_block	restart_block;}; #define INIT_THREAD_INFO(tsk)						\{									\	.task		= &tsk,						\	.exec_domain	= &default_exec_domain,				\	.flags		= 0,						\	.preempt_count	= 1,						\	.addr_limit	= KERNEL_DS,					\	.cpu_domain	= domain_val(DOMAIN_USER, DOMAIN_MANAGER) |	\			  domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) |	\			  domain_val(DOMAIN_IO, DOMAIN_CLIENT),		\	.restart_block	= {						\		.fn	= do_no_restart_syscall,			\	},								\} #define init_thread_info	(init_thread_union.thread_info)#define init_stack		(init_thread_union.stack) /* * how to get the thread information struct from C */static inline struct thread_info *current_thread_info(void) __attribute_const__; static inline struct thread_info *current_thread_info(void){	register unsigned long sp asm ("sp");	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));} extern struct thread_info *alloc_thread_info(struct task_struct *task);extern void free_thread_info(struct thread_info *); #define thread_saved_pc(tsk)	\	((unsigned long)(pc_pointer(task_thread_info(tsk)->cpu_context.pc)))#define thread_saved_fp(tsk)	\	((unsigned long)(task_thread_info(tsk)->cpu_context.fp)) extern void iwmmxt_task_disable(struct thread_info *);extern void iwmmxt_task_copy(struct thread_info *, void *);extern void iwmmxt_task_restore(struct thread_info *, void *);extern void iwmmxt_task_release(struct thread_info *); #endif /* * We use bit 30 of the preempt_count to indicate that kernel * preemption is occuring.  See include/asm-arm/hardirq.h. */#define PREEMPT_ACTIVE	0x40000000 /* * thread information flags: *  TIF_SYSCALL_TRACE	- syscall trace active *  TIF_NOTIFY_RESUME	- resumption notification requested *  TIF_SIGPENDING	- signal pending *  TIF_NEED_RESCHED	- rescheduling necessary *  TIF_USEDFPU		- FPU was used by this task this quantum (SMP) *  TIF_POLLING_NRFLAG	- true if poll_idle() is polling TIF_NEED_RESCHED */#define TIF_NOTIFY_RESUME	0#define TIF_SIGPENDING		1#define TIF_NEED_RESCHED	2#define TIF_SYSCALL_TRACE	8#define TIF_POLLING_NRFLAG	16#define TIF_USING_IWMMXT	17#define TIF_MEMDIE		18 #define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)#define _TIF_USING_IWMMXT	(1 << TIF_USING_IWMMXT) /* * Change these and you break ASM code in entry-common.S */#define _TIF_WORK_MASK		0x000000ff #endif /* __KERNEL__ */#endif /* __ASM_ARM_THREAD_INFO_H */