/* * 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 #define THREAD_SIZE_ORDER 1 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) #ifndef __ASSEMBLY__ #include 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 */ v>

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