fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-sh64 / thread_info.h
blobf6d5117c53af3c58d58028ac4b7e95fa5f530f98
1 #ifndef __ASM_SH64_THREAD_INFO_H
2 #define __ASM_SH64_THREAD_INFO_H
4 /*
5 * SuperH 5 version
6 * Copyright (C) 2003 Paul Mundt
7 */
9 #ifdef __KERNEL__
11 #ifndef __ASSEMBLY__
12 #include <asm/registers.h>
15 * low level task data that entry.S needs immediate access to
16 * - this struct should fit entirely inside of one cache line
17 * - this struct shares the supervisor stack pages
18 * - if the contents of this structure are changed, the assembly constants must also be changed
20 struct thread_info {
21 struct task_struct *task; /* main task structure */
22 struct exec_domain *exec_domain; /* execution domain */
23 unsigned long flags; /* low level flags */
24 /* Put the 4 32-bit fields together to make asm offsetting easier. */
25 int preempt_count; /* 0 => preemptable, <0 => BUG */
26 __u16 cpu;
28 mm_segment_t addr_limit;
29 struct restart_block restart_block;
31 __u8 supervisor_stack[0];
35 * macros/functions for gaining access to the thread information structure
37 #define INIT_THREAD_INFO(tsk) \
38 { \
39 .task = &tsk, \
40 .exec_domain = &default_exec_domain, \
41 .flags = 0, \
42 .cpu = 0, \
43 .preempt_count = 1, \
44 .addr_limit = KERNEL_DS, \
45 .restart_block = { \
46 .fn = do_no_restart_syscall, \
47 }, \
50 #define init_thread_info (init_thread_union.thread_info)
51 #define init_stack (init_thread_union.stack)
53 /* how to get the thread information struct from C */
54 static inline struct thread_info *current_thread_info(void)
56 struct thread_info *ti;
58 __asm__ __volatile__ ("getcon " __KCR0 ", %0\n\t" : "=r" (ti));
60 return ti;
63 /* thread information allocation */
67 #define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
68 #define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
70 #endif /* __ASSEMBLY__ */
72 #define THREAD_SIZE 8192
74 #define PREEMPT_ACTIVE 0x10000000
76 /* thread information flags */
77 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
78 #define TIF_SIGPENDING 2 /* signal pending */
79 #define TIF_NEED_RESCHED 3 /* rescheduling necessary */
80 #define TIF_MEMDIE 4
81 #define TIF_RESTORE_SIGMASK 5 /* Restore signal mask in do_signal */
83 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
84 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
85 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
86 #define _TIF_MEMDIE (1 << TIF_MEMDIE)
87 #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
89 #endif /* __KERNEL__ */
91 #endif /* __ASM_SH64_THREAD_INFO_H */