/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) * * Vineetg: Oct 2009 *  No need for ARC specific thread_info allocator (kmalloc/free). This is *  anyways one page allocation, thus slab alloc can be short-circuited and *  the generic version (get_free_page) would be loads better. * * Sameer Dhavale: Codito Technologies 2004 */ #ifndef _ASM_THREAD_INFO_H#define _ASM_THREAD_INFO_H #include <asm/page.h> #ifdef CONFIG_16KSTACKS#define THREAD_SIZE_ORDER 1#else#define THREAD_SIZE_ORDER 0#endif #define THREAD_SIZE     (PAGE_SIZE << THREAD_SIZE_ORDER)#define THREAD_SHIFT	(PAGE_SHIFT << THREAD_SIZE_ORDER) #ifndef __ASSEMBLER__ #include <linux/thread_info.h> /* * low level task data that entry.S needs immediate access to * - this struct should fit entirely inside of one cache line * - this struct shares the supervisor stack pages * - if the contents of this structure are changed, the assembly constants *   must also be changed */struct thread_info {	unsigned long flags;		/* low level flags */	unsigned long ksp;		/* kernel mode stack top in __switch_to */	int preempt_count;		/* 0 => preemptible, <0 => BUG */	int cpu;			/* current CPU */	unsigned long thr_ptr;		/* TLS ptr */	struct task_struct *task;	/* main task structure */}; /* * initilaize thread_info for any @tsk *  - this is not related to init_task per se */#define INIT_THREAD_INFO(tsk)			\{						\	.task       = &tsk,			\	.flags      = 0,			\	.cpu        = 0,			\	.preempt_count  = INIT_PREEMPT_COUNT,	\} static inline __attribute_const__ struct thread_info *current_thread_info(void){	register unsigned long sp asm("sp");	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));} #endif /* !__ASSEMBLER__ */ /* * 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_RESTORE_SIGMASK	0	/* restore sig mask in do_signal() */#define TIF_NOTIFY_RESUME	1	/* resumption notification requested */#define TIF_SIGPENDING		2	/* signal pending */#define TIF_NEED_RESCHED	3	/* rescheduling necessary */#define TIF_SYSCALL_AUDIT	4	/* syscall auditing active */#define TIF_NOTIFY_SIGNAL	5	/* signal notifications exist */#define TIF_SYSCALL_TRACE	15	/* syscall trace active *//* true if poll_idle() is polling TIF_NEED_RESCHED */#define TIF_MEMDIE		16#define TIF_SYSCALL_TRACEPOINT	17	/* syscall tracepoint instrumentation */ #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_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)#define _TIF_NOTIFY_SIGNAL	(1<<TIF_NOTIFY_SIGNAL)#define _TIF_MEMDIE		(1<<TIF_MEMDIE)#define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT) /* work to do on interrupt/exception return */#define _TIF_WORK_MASK		(_TIF_NEED_RESCHED | _TIF_SIGPENDING | \				 _TIF_NOTIFY_RESUME | _TIF_NOTIFY_SIGNAL) #define _TIF_SYSCALL_WORK	(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT) /* * _TIF_ALLWORK_MASK includes SYSCALL_TRACE, but we don't need it. * SYSCALL_TRACE is anyway separately/unconditionally tested right after a * syscall, so all that remains to be tested is _TIF_WORK_MASK */ #endif /* _ASM_THREAD_INFO_H */