include/asm-x86/thread_info_32.h - kernel/msm-4.9 - Gitiles

 /* thread_info.h: i386 low-level thread information
  *
  * Copyright (C) 2002  David Howells (dhowells@redhat.com)
  * - Incorporating suggestions made by Linus Torvalds and Dave Miller
  */

 #ifndef _ASM_THREAD_INFO_H
 #define _ASM_THREAD_INFO_H

 #ifdef __KERNEL__

 #include <linux/compiler.h>
 #include <asm/page.h>

 #ifndef __ASSEMBLY__
 #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 __ASSEMBLY__

 struct thread_info {
 	struct task_struct	*task;		/* main task structure */
 	struct exec_domain	*exec_domain;	/* execution domain */
 	unsigned long		flags;		/* low level flags */
 	unsigned long		status;		/* thread-synchronous flags */
 	__u32			cpu;		/* current CPU */
 	int			preempt_count;	/* 0 => preemptable,
 						   <0 => BUG */
 	mm_segment_t		addr_limit;	/* thread address space:
 						   0-0xBFFFFFFF user-thread
 						   0-0xFFFFFFFF kernel-thread
 						*/
 	void			*sysenter_return;
 	struct restart_block    restart_block;
 	unsigned long           previous_esp;   /* ESP of the previous stack in
 						   case of nested (IRQ) stacks
 						*/
 	__u8			supervisor_stack[0];
 };

 #else /* !__ASSEMBLY__ */

 #include <asm/asm-offsets.h>

 #endif

 #define PREEMPT_ACTIVE		0x10000000
 #ifdef CONFIG_4KSTACKS
 #define THREAD_SIZE            (4096)
 #else
 #define THREAD_SIZE		(8192)
 #endif

 #define STACK_WARN             (THREAD_SIZE/8)
 /*
  * macros/functions for gaining access to the thread information structure
  *
  * preempt_count needs to be 1 initially, until the scheduler is functional.
  */
 #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("esp") __used;

 /* how to get the thread information struct from C */
 static inline struct thread_info *current_thread_info(void)
 {
 	return (struct thread_info *)
 		(current_stack_pointer & ~(THREAD_SIZE - 1));
 }

 /* thread information allocation */
 #ifdef CONFIG_DEBUG_STACK_USAGE
 #define alloc_thread_info(tsk) ((struct thread_info *)			\
 	__get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(THREAD_SIZE)))
 #else
 #define alloc_thread_info(tsk) ((struct thread_info *)			\
 	__get_free_pages(GFP_KERNEL, get_order(THREAD_SIZE)))
 #endif

 #else /* !__ASSEMBLY__ */

 /* how to get the thread information struct from ASM */
 #define GET_THREAD_INFO(reg)	 \
 	movl $-THREAD_SIZE, reg; \
 	andl %esp, reg

 /* use this one if reg already contains %esp */
 #define GET_THREAD_INFO_WITH_ESP(reg) \
 	andl $-THREAD_SIZE, reg

 #endif

 /*
  * 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_SIGPENDING		1	/* signal pending */
 #define TIF_NEED_RESCHED	2	/* rescheduling necessary */
 #define TIF_SINGLESTEP		3	/* restore singlestep on return to
 					   user mode */
 #define TIF_IRET		4	/* return with iret */
 #define TIF_SYSCALL_EMU		5	/* syscall emulation active */
 #define TIF_SYSCALL_AUDIT	6	/* syscall auditing active */
 #define TIF_SECCOMP		7	/* secure computing */
 #define TIF_HRTICK_RESCHED	9	/* reprogram hrtick timer */
 #define TIF_MEMDIE		16
 #define TIF_DEBUG		17	/* uses debug registers */
 #define TIF_IO_BITMAP		18	/* uses I/O bitmap */
 #define TIF_FREEZE		19	/* is freezing for suspend */
 #define TIF_NOTSC		20	/* TSC is not accessible in userland */
 #define TIF_FORCED_TF		21	/* true if TF in eflags artificially */
 #define TIF_DEBUGCTLMSR		22	/* uses thread_struct.debugctlmsr */
 #define TIF_DS_AREA_MSR 	23      /* uses thread_struct.ds_area_msr */
 #define TIF_BTS_TRACE_TS        24      /* record scheduling event timestamps */

 #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_IRET		(1 << TIF_IRET)
 #define _TIF_SYSCALL_EMU	(1 << TIF_SYSCALL_EMU)
 #define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
 #define _TIF_SECCOMP		(1 << TIF_SECCOMP)
 #define _TIF_HRTICK_RESCHED	(1 << TIF_HRTICK_RESCHED)
 #define _TIF_DEBUG		(1 << TIF_DEBUG)
 #define _TIF_IO_BITMAP		(1 << TIF_IO_BITMAP)
 #define _TIF_FREEZE		(1 << TIF_FREEZE)
 #define _TIF_NOTSC		(1 << TIF_NOTSC)
 #define _TIF_FORCED_TF		(1 << TIF_FORCED_TF)
 #define _TIF_DEBUGCTLMSR	(1 << TIF_DEBUGCTLMSR)
 #define _TIF_DS_AREA_MSR	(1 << TIF_DS_AREA_MSR)
 #define _TIF_BTS_TRACE_TS	(1 << TIF_BTS_TRACE_TS)

 /* work to do on interrupt/exception return */
 #define _TIF_WORK_MASK							\
 	(0x0000FFFF & ~(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT |	\
 			_TIF_SECCOMP | _TIF_SYSCALL_EMU))
 /* work to do on any return to u-space */
 #define _TIF_ALLWORK_MASK	(0x0000FFFF & ~_TIF_SECCOMP)

 /* flags to check in __switch_to() */
 #define _TIF_WORK_CTXSW						\
 	(_TIF_IO_BITMAP | _TIF_NOTSC | _TIF_DEBUGCTLMSR |	\
 	 _TIF_DS_AREA_MSR | _TIF_BTS_TRACE_TS)
 #define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
 #define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW | _TIF_DEBUG)


 /*
  * Thread-synchronous status.
  *
  * This is different from the flags in that nobody else
  * ever touches our thread-synchronous status, so we don't
  * have to worry about atomic accesses.
  */
 #define TS_USEDFPU		0x0001	/* FPU was used by this task
 					   this quantum (SMP) */
 #define TS_POLLING		0x0002	/* True if in idle loop
 					   and not sleeping */
 #define TS_RESTORE_SIGMASK	0x0004	/* restore signal mask in do_signal() */

 #define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)

 #ifndef __ASSEMBLY__
 #define HAVE_SET_RESTORE_SIGMASK	1
 static inline void set_restore_sigmask(void)
 {
 	struct thread_info *ti = current_thread_info();
 	ti->status |= TS_RESTORE_SIGMASK;
 	set_bit(TIF_SIGPENDING, &ti->flags);
 }
 #endif	/* !__ASSEMBLY__ */

 #endif /* __KERNEL__ */

 #endif /* _ASM_THREAD_INFO_H */
	/* thread_info.h: i386 low-level thread information
	*
	* Copyright (C) 2002 David Howells (dhowells@redhat.com)
	* - Incorporating suggestions made by Linus Torvalds and Dave Miller
	*/

	#ifndef _ASM_THREAD_INFO_H
	#define _ASM_THREAD_INFO_H

	#ifdef __KERNEL__

	#include <linux/compiler.h>
	#include <asm/page.h>

	#ifndef __ASSEMBLY__
	#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 __ASSEMBLY__

	struct thread_info {
	struct task_struct task; / main task structure */
	struct exec_domain exec_domain; / execution domain */
	unsigned long flags; /* low level flags */
	unsigned long status; /* thread-synchronous flags */
	__u32 cpu; /* current CPU */
	int preempt_count; /* 0 => preemptable,
	<0 => BUG */
	mm_segment_t addr_limit; /* thread address space:
	0-0xBFFFFFFF user-thread
	0-0xFFFFFFFF kernel-thread
	*/
	void *sysenter_return;
	struct restart_block restart_block;
	unsigned long previous_esp; /* ESP of the previous stack in
	case of nested (IRQ) stacks
	*/
	__u8 supervisor_stack[0];
	};

	#else /* !__ASSEMBLY__ */

	#include <asm/asm-offsets.h>

	#endif

	#define PREEMPT_ACTIVE 0x10000000
	#ifdef CONFIG_4KSTACKS
	#define THREAD_SIZE (4096)
	#else
	#define THREAD_SIZE (8192)
	#endif

	#define STACK_WARN (THREAD_SIZE/8)
	/*
	* macros/functions for gaining access to the thread information structure
	*
	* preempt_count needs to be 1 initially, until the scheduler is functional.
	*/
	#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("esp") __used;

	/* how to get the thread information struct from C */
	static inline struct thread_info *current_thread_info(void)
	{
	return (struct thread_info *)
	(current_stack_pointer & ~(THREAD_SIZE - 1));
	}

	/* thread information allocation */
	#ifdef CONFIG_DEBUG_STACK_USAGE
	#define alloc_thread_info(tsk) ((struct thread_info *) \
	__get_free_pages(GFP_KERNEL \| __GFP_ZERO, get_order(THREAD_SIZE)))
	#else
	#define alloc_thread_info(tsk) ((struct thread_info *) \
	__get_free_pages(GFP_KERNEL, get_order(THREAD_SIZE)))
	#endif

	#else /* !__ASSEMBLY__ */

	/* how to get the thread information struct from ASM */
	#define GET_THREAD_INFO(reg) \
	movl $-THREAD_SIZE, reg; \
	andl %esp, reg

	/* use this one if reg already contains %esp */
	#define GET_THREAD_INFO_WITH_ESP(reg) \
	andl $-THREAD_SIZE, reg

	#endif

	/*
	* 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_SIGPENDING 1 /* signal pending */
	#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
	#define TIF_SINGLESTEP 3 /* restore singlestep on return to
	user mode */
	#define TIF_IRET 4 /* return with iret */
	#define TIF_SYSCALL_EMU 5 /* syscall emulation active */
	#define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */
	#define TIF_SECCOMP 7 /* secure computing */
	#define TIF_HRTICK_RESCHED 9 /* reprogram hrtick timer */
	#define TIF_MEMDIE 16
	#define TIF_DEBUG 17 /* uses debug registers */
	#define TIF_IO_BITMAP 18 /* uses I/O bitmap */
	#define TIF_FREEZE 19 /* is freezing for suspend */
	#define TIF_NOTSC 20 /* TSC is not accessible in userland */
	#define TIF_FORCED_TF 21 /* true if TF in eflags artificially */
	#define TIF_DEBUGCTLMSR 22 /* uses thread_struct.debugctlmsr */
	#define TIF_DS_AREA_MSR 23 /* uses thread_struct.ds_area_msr */
	#define TIF_BTS_TRACE_TS 24 /* record scheduling event timestamps */

	#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_IRET (1 << TIF_IRET)
	#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
	#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
	#define _TIF_SECCOMP (1 << TIF_SECCOMP)
	#define _TIF_HRTICK_RESCHED (1 << TIF_HRTICK_RESCHED)
	#define _TIF_DEBUG (1 << TIF_DEBUG)
	#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
	#define _TIF_FREEZE (1 << TIF_FREEZE)
	#define _TIF_NOTSC (1 << TIF_NOTSC)
	#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
	#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
	#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
	#define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS)

	/* work to do on interrupt/exception return */
	#define _TIF_WORK_MASK \
	(0x0000FFFF & ~(_TIF_SYSCALL_TRACE \| _TIF_SYSCALL_AUDIT \| \
	_TIF_SECCOMP \| _TIF_SYSCALL_EMU))
	/* work to do on any return to u-space */
	#define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)

	/* flags to check in __switch_to() */
	#define _TIF_WORK_CTXSW \
	(_TIF_IO_BITMAP \| _TIF_NOTSC \| _TIF_DEBUGCTLMSR \| \
	_TIF_DS_AREA_MSR \| _TIF_BTS_TRACE_TS)
	#define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
	#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW \| _TIF_DEBUG)


	/*
	* Thread-synchronous status.
	*
	* This is different from the flags in that nobody else
	* ever touches our thread-synchronous status, so we don't
	* have to worry about atomic accesses.
	*/
	#define TS_USEDFPU 0x0001 /* FPU was used by this task
	this quantum (SMP) */
	#define TS_POLLING 0x0002 /* True if in idle loop
	and not sleeping */
	#define TS_RESTORE_SIGMASK 0x0004 /* restore signal mask in do_signal() */

	#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)

	#ifndef __ASSEMBLY__
	#define HAVE_SET_RESTORE_SIGMASK 1
	static inline void set_restore_sigmask(void)
	{
	struct thread_info *ti = current_thread_info();
	ti->status \|= TS_RESTORE_SIGMASK;
	set_bit(TIF_SIGPENDING, &ti->flags);
	}
	#endif /* !__ASSEMBLY__ */

	#endif /* __KERNEL__ */

	#endif /* _ASM_THREAD_INFO_H */