#ifndef __ASM_SH_THREAD_INFO_H#define __ASM_SH_THREAD_INFO_H /* SuperH version * Copyright (C) 2002  Niibe Yutaka * * The copyright of original i386 version is: * *  Copyright (C) 2002  David Howells (dhowells@redhat.com) *  - Incorporating suggestions made by Linus Torvalds and Dave Miller */#ifdef __KERNEL__#include <asm/page.h> #ifndef __ASSEMBLY__#include <asm/processor.h> struct thread_info {	struct task_struct	*task;		/* main task structure */	struct exec_domain	*exec_domain;	/* execution domain */	unsigned long		flags;		/* low level flags */	__u32			cpu;	int			preempt_count; /* 0 => preemptable, <0 => BUG */	mm_segment_t		addr_limit;	/* thread address space */	struct restart_block	restart_block;	unsigned long		previous_sp;	/* sp of previous stack in case						   of nested IRQ stacks */	__u8			supervisor_stack[0];}; #endif #define PREEMPT_ACTIVE		0x10000000 #if defined(CONFIG_4KSTACKS)#define THREAD_SIZE_ORDER	(0)#elif defined(CONFIG_PAGE_SIZE_4KB)#define THREAD_SIZE_ORDER	(1)#elif defined(CONFIG_PAGE_SIZE_8KB)#define THREAD_SIZE_ORDER	(1)#elif defined(CONFIG_PAGE_SIZE_64KB)#define THREAD_SIZE_ORDER	(0)#else#error "Unknown thread size"#endif #define THREAD_SIZE	(PAGE_SIZE << THREAD_SIZE_ORDER)#define STACK_WARN	(THREAD_SIZE >> 3) /* * macros/functions for gaining access to the thread information structure */#ifndef __ASSEMBLY__#define INIT_THREAD_INFO(tsk)			\{						\	.task		= &tsk,			\	.exec_domain	= &default_exec_domain,	\	.flags		= 0,			\	.cpu		= 0,			\	.preempt_count	= 1,			\	.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 current stack pointer from C */register unsigned long current_stack_pointer asm("r15") __attribute_used__; /* how to get the thread information struct from C */static inline struct thread_info *current_thread_info(void){	struct thread_info *ti;#ifdef CONFIG_CPU_HAS_SR_RB	__asm__("stc	r7_bank, %0" : "=r" (ti));#else	unsigned long __dummy; 	__asm__ __volatile__ (		"mov	r15, %0\n\t"		"and	%1, %0\n\t"		: "=&r" (ti), "=r" (__dummy)		: "1" (~(THREAD_SIZE - 1))		: "memory");#endif 	return ti;} /* thread information allocation */#ifdef CONFIG_DEBUG_STACK_USAGE#define alloc_thread_info(ti)	kzalloc(THREAD_SIZE, GFP_KERNEL)#else#define alloc_thread_info(ti)	kmalloc(THREAD_SIZE, GFP_KERNEL)#endif#define free_thread_info(ti)	kfree(ti) #endif /* __ASSEMBLY__ */ /* * thread information flags * - these are process state flags that various assembly files may need to access * - pending work-to-be-done flags are in LSW * - other flags in MSW */#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_RESTORE_SIGMASK	4	/* restore signal mask in do_signal() */#define TIF_SINGLESTEP		5	/* singlestepping active */#define TIF_USEDFPU		16	/* FPU was used by this task this quantum (SMP) */#define TIF_POLLING_NRFLAG	17	/* true if poll_idle() is polling TIF_NEED_RESCHED */#define TIF_MEMDIE		18#define TIF_FREEZE		19 #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_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)#define _TIF_SINGLESTEP		(1<<TIF_SINGLESTEP)#define _TIF_USEDFPU		(1<<TIF_USEDFPU)#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)#define _TIF_FREEZE		(1<<TIF_FREEZE) #define _TIF_WORK_MASK		0x000000FE	/* work to do on interrupt/exception return */#define _TIF_ALLWORK_MASK	0x000000FF	/* work to do on any return to u-space */ #endif /* __KERNEL__ */ #endif /* __ASM_SH_THREAD_INFO_H */