| /* |
| * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) |
| * Licensed under the GPL |
| */ |
| |
| #ifndef __UM_THREAD_INFO_H |
| #define __UM_THREAD_INFO_H |
| |
| #ifndef __ASSEMBLY__ |
| |
| #include <asm/types.h> |
| #include <asm/page.h> |
| #include <asm/uaccess.h> |
| |
| struct thread_info { |
| struct task_struct *task; /* main task structure */ |
| struct exec_domain *exec_domain; /* execution domain */ |
| unsigned long flags; /* low level flags */ |
| __u32 cpu; /* current CPU */ |
| int preempt_count; /* 0 => preemptable, |
| <0 => BUG */ |
| mm_segment_t addr_limit; /* thread address space: |
| 0-0xBFFFFFFF for user |
| 0-0xFFFFFFFF for kernel */ |
| struct restart_block restart_block; |
| struct thread_info *real_thread; /* Points to non-IRQ stack */ |
| }; |
| |
| #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, \ |
| }, \ |
| .real_thread = NULL, \ |
| } |
| |
| #define init_thread_info (init_thread_union.thread_info) |
| #define init_stack (init_thread_union.stack) |
| |
| #define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE) |
| /* how to get the thread information struct from C */ |
| static inline struct thread_info *current_thread_info(void) |
| { |
| struct thread_info *ti; |
| unsigned long mask = THREAD_SIZE - 1; |
| ti = (struct thread_info *) (((unsigned long) &ti) & ~mask); |
| return ti; |
| } |
| |
| #ifdef CONFIG_DEBUG_STACK_USAGE |
| |
| #define alloc_thread_info(tsk) \ |
| ((struct thread_info *) __get_free_pages(GFP_KERNEL | __GFP_ZERO, \ |
| CONFIG_KERNEL_STACK_ORDER)) |
| #else |
| |
| /* thread information allocation */ |
| #define alloc_thread_info(tsk) \ |
| ((struct thread_info *) __get_free_pages(GFP_KERNEL, \ |
| CONFIG_KERNEL_STACK_ORDER)) |
| #endif |
| |
| #define free_thread_info(ti) \ |
| free_pages((unsigned long)(ti),CONFIG_KERNEL_STACK_ORDER) |
| |
| #endif |
| |
| #define PREEMPT_ACTIVE 0x10000000 |
| |
| #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ |
| #define TIF_SIGPENDING 1 /* signal pending */ |
| #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ |
| #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling |
| * TIF_NEED_RESCHED |
| */ |
| #define TIF_RESTART_BLOCK 4 |
| #define TIF_MEMDIE 5 |
| #define TIF_SYSCALL_AUDIT 6 |
| #define TIF_RESTORE_SIGMASK 7 |
| |
| #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
| #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
| #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) |
| #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) |
| #define _TIF_MEMDIE (1 << TIF_MEMDIE) |
| #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) |
| #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) |
| |
| #endif |