/* *  linux/include/asm-arm26/thread_info.h * *  Copyright (C) 2002 Russell King. *  Copyright (C) 2003 Ian Molton. * * 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__ #ifndef __ASSEMBLY__ struct task_struct;struct exec_domain; #include <linux/compiler.h>#include <asm/fpstate.h>#include <asm/ptrace.h>#include <asm/types.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;}; /* * low level task data that entry.S needs immediate access to. * We assume cpu_context follows immedately 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 */	struct cpu_context_save	cpu_context;	/* cpu context */	struct restart_block    restart_block;	union fp_state		fpstate;}; #define INIT_THREAD_INFO(tsk)			\{						\	.task		&tsk,			\	.exec_domain	&default_exec_domain,	\	.flags		0,			\	.preempt_count	0,			\	.addr_limit	KERNEL_DS,		\	.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 & ~0x1fff);} #define THREAD_SIZE	PAGE_SIZE#define task_pt_regs(task) ((struct pt_regs *)(task_stack_page(task) + THREAD_SIZE - 8) - 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)) #else /* !__ASSEMBLY__ */ #define TI_FLAGS	0#define TI_PREEMPT	4#define TI_ADDR_LIMIT	8#define TI_TASK		12#define TI_EXEC_DOMAIN  16#define TI_CPU		20#define TI_CPU_SAVE	24#define TI_RESTART_BLOCK 28#define TI_FPSTATE	68 #endif #define PREEMPT_ACTIVE	0x04000000 /* * 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_USED_FPU		16#define TIF_POLLING_NRFLAG	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_USED_FPU		(1 << TIF_USED_FPU)#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG) /* * Change these and you break ASM code in entry-common.S */#define _TIF_WORK_MASK		0x000000ff #endif /* __KERNEL__ */#endif /* __ASM_ARM_THREAD_INFO_H */