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/*
* 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 */
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