mirror of https://gitee.com/openkylin/linux.git
104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/*
|
|
* Copyright (C) 2004-2006 Atmel Corporation
|
|
*
|
|
* 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_AVR32_THREAD_INFO_H
|
|
#define __ASM_AVR32_THREAD_INFO_H
|
|
|
|
#include <asm/page.h>
|
|
|
|
#define THREAD_SIZE_ORDER 1
|
|
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/types.h>
|
|
|
|
struct task_struct;
|
|
|
|
struct thread_info {
|
|
struct task_struct *task; /* main task structure */
|
|
unsigned long flags; /* low level flags */
|
|
__u32 cpu;
|
|
__s32 preempt_count; /* 0 => preemptable, <0 => BUG */
|
|
__u32 rar_saved; /* return address... */
|
|
__u32 rsr_saved; /* ...and status register
|
|
saved by debug handler
|
|
when setting up
|
|
trampoline */
|
|
__u8 supervisor_stack[0];
|
|
};
|
|
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task = &tsk, \
|
|
.flags = 0, \
|
|
.cpu = 0, \
|
|
.preempt_count = INIT_PREEMPT_COUNT, \
|
|
}
|
|
|
|
#define init_thread_info (init_thread_union.thread_info)
|
|
#define init_stack (init_thread_union.stack)
|
|
|
|
/*
|
|
* Get the thread information struct from C.
|
|
* We do the usual trick and use the lower end of the stack for this
|
|
*/
|
|
static inline struct thread_info *current_thread_info(void)
|
|
{
|
|
unsigned long addr = ~(THREAD_SIZE - 1);
|
|
|
|
asm("and %0, sp" : "=r"(addr) : "0"(addr));
|
|
return (struct thread_info *)addr;
|
|
}
|
|
|
|
#define get_thread_info(ti) get_task_struct((ti)->task)
|
|
#define put_thread_info(ti) put_task_struct((ti)->task)
|
|
|
|
#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_SIGPENDING 1 /* signal pending */
|
|
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
|
|
#define TIF_BREAKPOINT 4 /* enter monitor mode on return */
|
|
#define TIF_SINGLE_STEP 5 /* single step in progress */
|
|
#define TIF_MEMDIE 6 /* is terminating due to OOM killer */
|
|
#define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal */
|
|
#define TIF_CPU_GOING_TO_SLEEP 8 /* CPU is entering sleep 0 mode */
|
|
#define TIF_NOTIFY_RESUME 9 /* callback before returning to user */
|
|
#define TIF_DEBUG 30 /* debugging enabled */
|
|
#define TIF_USERSPACE 31 /* true if FS sets userspace */
|
|
|
|
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
|
|
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
|
|
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
|
|
#define _TIF_BREAKPOINT (1 << TIF_BREAKPOINT)
|
|
#define _TIF_SINGLE_STEP (1 << TIF_SINGLE_STEP)
|
|
#define _TIF_MEMDIE (1 << TIF_MEMDIE)
|
|
#define _TIF_CPU_GOING_TO_SLEEP (1 << TIF_CPU_GOING_TO_SLEEP)
|
|
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
|
|
|
|
/* Note: The masks below must never span more than 16 bits! */
|
|
|
|
/* work to do on interrupt/exception return */
|
|
#define _TIF_WORK_MASK \
|
|
(_TIF_SIGPENDING \
|
|
| _TIF_NOTIFY_RESUME \
|
|
| _TIF_NEED_RESCHED \
|
|
| _TIF_BREAKPOINT)
|
|
|
|
/* work to do on any return to userspace */
|
|
#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK | _TIF_SYSCALL_TRACE)
|
|
/* work to do on return from debug mode */
|
|
#define _TIF_DBGWORK_MASK (_TIF_WORK_MASK & ~_TIF_BREAKPOINT)
|
|
|
|
#endif /* __ASM_AVR32_THREAD_INFO_H */
|