/* * include/asm-xtensa/thread_info.h * * 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. * * Copyright (C) 2001 - 2005 Tensilica Inc. */ #ifndef _XTENSA_THREAD_INFO_H#define _XTENSA_THREAD_INFO_H #include <linux/stringify.h>#include <asm/kmem_layout.h> #define CURRENT_SHIFT KERNEL_STACK_SHIFT #ifndef __ASSEMBLER__# include <asm/processor.h>#endif /* * 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 */ #ifndef __ASSEMBLER__ #if XTENSA_HAVE_COPROCESSORS typedef struct xtregs_coprocessor {	xtregs_cp0_t cp0;	xtregs_cp1_t cp1;	xtregs_cp2_t cp2;	xtregs_cp3_t cp3;	xtregs_cp4_t cp4;	xtregs_cp5_t cp5;	xtregs_cp6_t cp6;	xtregs_cp7_t cp7;} xtregs_coprocessor_t; #endif struct thread_info {	struct task_struct	*task;		/* main task structure */	unsigned long		flags;		/* low level flags */	unsigned long		status;		/* thread-synchronous flags */	__u32			cpu;		/* current CPU */	__s32			preempt_count;	/* 0 => preemptable,< 0 => BUG*/ #if XCHAL_HAVE_EXCLUSIVE	/* result of the most recent exclusive store */	unsigned long		atomctl8;#endif#ifdef CONFIG_USER_ABI_CALL0_PROBE	/* Address where PS.WOE was enabled by the ABI probing code */	unsigned long		ps_woe_fix_addr;#endif 	/*	 * If i-th bit is set then coprocessor state is loaded into the	 * coprocessor i on CPU cp_owner_cpu.	 */	unsigned long		cpenable;	u32			cp_owner_cpu;	/* Allocate storage for extra user states and coprocessor states. */#if XTENSA_HAVE_COPROCESSORS	xtregs_coprocessor_t	xtregs_cp;#endif	xtregs_user_t		xtregs_user;}; #endif /* * macros/functions for gaining access to the thread information structure */ #ifndef __ASSEMBLER__ #define INIT_THREAD_INFO(tsk)			\{						\	.task		= &tsk,			\	.flags		= 0,			\	.cpu		= 0,			\	.preempt_count	= INIT_PREEMPT_COUNT,	\} /* how to get the thread information struct from C */static __always_inline struct thread_info *current_thread_info(void){	struct thread_info *ti;	 __asm__("extui %0, a1, 0, "__stringify(CURRENT_SHIFT)"\n\t"	         "xor %0, a1, %0" : "=&r" (ti) : );	return ti;} #else /* !__ASSEMBLER__ */ /* how to get the thread information struct from ASM */#define GET_THREAD_INFO(reg,sp) \	extui reg, sp, 0, CURRENT_SHIFT; \	xor   reg, sp, reg#endif  /* * thread information flags * - these are process state flags that various assembly files may need to access */#define TIF_SYSCALL_TRACE	0	/* syscall trace active */#define TIF_SIGPENDING		1	/* signal pending */#define TIF_NEED_RESCHED	2	/* rescheduling necessary */#define TIF_SINGLESTEP		3	/* restore singlestep on return to user mode */#define TIF_SYSCALL_TRACEPOINT	4	/* syscall tracepoint instrumentation */#define TIF_NOTIFY_SIGNAL	5	/* signal notifications exist */#define TIF_RESTORE_SIGMASK	6	/* restore signal mask in do_signal() */#define TIF_NOTIFY_RESUME	7	/* callback before returning to user */#define TIF_DB_DISABLED		8	/* debug trap disabled for syscall */#define TIF_SYSCALL_AUDIT	9	/* syscall auditing active */#define TIF_SECCOMP		10	/* secure computing */#define TIF_MEMDIE		11	/* is terminating due to OOM killer */ #define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)#define _TIF_SINGLESTEP		(1<<TIF_SINGLESTEP)#define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)#define _TIF_NOTIFY_SIGNAL	(1<<TIF_NOTIFY_SIGNAL)#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)#define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)#define _TIF_SECCOMP		(1<<TIF_SECCOMP) #define _TIF_WORK_MASK		(_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \				 _TIF_SYSCALL_TRACEPOINT | \				 _TIF_SYSCALL_AUDIT | _TIF_SECCOMP) #define THREAD_SIZE KERNEL_STACK_SIZE#define THREAD_SIZE_ORDER (KERNEL_STACK_SHIFT - PAGE_SHIFT) #endif	/* _XTENSA_THREAD_INFO */