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1/*
2 * NiosII low-level thread information
3 *
4 * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch>
5 * Copyright (C) 2004 Microtronix Datacom Ltd.
6 *
7 * Based on asm/thread_info_no.h from m68k which is:
8 *
9 * Copyright (C) 2002 David Howells <dhowells@redhat.com>
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file "COPYING" in the main directory of this archive
13 * for more details.
14 */
15
16#ifndef _ASM_NIOS2_THREAD_INFO_H
17#define _ASM_NIOS2_THREAD_INFO_H
18
19#ifdef __KERNEL__
20
21/*
22 * Size of the kernel stack for each process.
23 */
24#define THREAD_SIZE_ORDER 1
25#define THREAD_SIZE 8192 /* 2 * PAGE_SIZE */
26
27#ifndef __ASSEMBLY__
28
29/*
30 * low level task data that entry.S needs immediate access to
31 * - this struct should fit entirely inside of one cache line
32 * - this struct shares the supervisor stack pages
33 * - if the contents of this structure are changed, the assembly constants
34 * must also be changed
35 */
36struct thread_info {
37 struct task_struct *task; /* main task structure */
38 unsigned long flags; /* low level flags */
39 __u32 cpu; /* current CPU */
40 int preempt_count; /* 0 => preemptable,<0 => BUG */
41 struct pt_regs *regs;
42};
43
44/*
45 * macros/functions for gaining access to the thread information structure
46 *
47 * preempt_count needs to be 1 initially, until the scheduler is functional.
48 */
49#define INIT_THREAD_INFO(tsk) \
50{ \
51 .task = &tsk, \
52 .flags = 0, \
53 .cpu = 0, \
54 .preempt_count = INIT_PREEMPT_COUNT, \
55}
56
57/* how to get the thread information struct from C */
58static inline struct thread_info *current_thread_info(void)
59{
60 register unsigned long sp asm("sp");
61
62 return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
63}
64#endif /* !__ASSEMBLY__ */
65
66/*
67 * thread information flags
68 * - these are process state flags that various assembly files may need to
69 * access
70 * - pending work-to-be-done flags are in LSW
71 * - other flags in MSW
72 */
73#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
74#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
75#define TIF_SIGPENDING 2 /* signal pending */
76#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
77#define TIF_MEMDIE 4 /* is terminating due to OOM killer */
78#define TIF_SECCOMP 5 /* secure computing */
79#define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */
80#define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */
81#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
82
83#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling
84 TIF_NEED_RESCHED */
85
86#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
87#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
88#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
89#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
90#define _TIF_SECCOMP (1 << TIF_SECCOMP)
91#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
92#define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL)
93#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
94#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
95
96/* work to do on interrupt/exception return */
97#define _TIF_WORK_MASK 0x0000FFFE
98
99/* work to do on any return to u-space */
100# define _TIF_ALLWORK_MASK 0x0000FFFF
101
102#endif /* __KERNEL__ */
103
104#endif /* _ASM_NIOS2_THREAD_INFO_H */
1/*
2 * NiosII low-level thread information
3 *
4 * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch>
5 * Copyright (C) 2004 Microtronix Datacom Ltd.
6 *
7 * Based on asm/thread_info_no.h from m68k which is:
8 *
9 * Copyright (C) 2002 David Howells <dhowells@redhat.com>
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file "COPYING" in the main directory of this archive
13 * for more details.
14 */
15
16#ifndef _ASM_NIOS2_THREAD_INFO_H
17#define _ASM_NIOS2_THREAD_INFO_H
18
19#ifdef __KERNEL__
20
21/*
22 * Size of the kernel stack for each process.
23 */
24#define THREAD_SIZE_ORDER 1
25#define THREAD_SIZE 8192 /* 2 * PAGE_SIZE */
26
27#ifndef __ASSEMBLY__
28
29typedef struct {
30 unsigned long seg;
31} mm_segment_t;
32
33/*
34 * low level task data that entry.S needs immediate access to
35 * - this struct should fit entirely inside of one cache line
36 * - this struct shares the supervisor stack pages
37 * - if the contents of this structure are changed, the assembly constants
38 * must also be changed
39 */
40struct thread_info {
41 struct task_struct *task; /* main task structure */
42 unsigned long flags; /* low level flags */
43 __u32 cpu; /* current CPU */
44 int preempt_count; /* 0 => preemptable,<0 => BUG */
45 mm_segment_t addr_limit; /* thread address space:
46 0-0x7FFFFFFF for user-thead
47 0-0xFFFFFFFF for kernel-thread
48 */
49 struct pt_regs *regs;
50};
51
52/*
53 * macros/functions for gaining access to the thread information structure
54 *
55 * preempt_count needs to be 1 initially, until the scheduler is functional.
56 */
57#define INIT_THREAD_INFO(tsk) \
58{ \
59 .task = &tsk, \
60 .flags = 0, \
61 .cpu = 0, \
62 .preempt_count = INIT_PREEMPT_COUNT, \
63 .addr_limit = KERNEL_DS, \
64}
65
66#define init_thread_info (init_thread_union.thread_info)
67#define init_stack (init_thread_union.stack)
68
69/* how to get the thread information struct from C */
70static inline struct thread_info *current_thread_info(void)
71{
72 register unsigned long sp asm("sp");
73
74 return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
75}
76#endif /* !__ASSEMBLY__ */
77
78/*
79 * thread information flags
80 * - these are process state flags that various assembly files may need to
81 * access
82 * - pending work-to-be-done flags are in LSW
83 * - other flags in MSW
84 */
85#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
86#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
87#define TIF_SIGPENDING 2 /* signal pending */
88#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
89#define TIF_MEMDIE 4 /* is terminating due to OOM killer */
90#define TIF_SECCOMP 5 /* secure computing */
91#define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */
92#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
93
94#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling
95 TIF_NEED_RESCHED */
96
97#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
98#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
99#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
100#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
101#define _TIF_SECCOMP (1 << TIF_SECCOMP)
102#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
103#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
104#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
105
106/* work to do on interrupt/exception return */
107#define _TIF_WORK_MASK 0x0000FFFE
108
109/* work to do on any return to u-space */
110# define _TIF_ALLWORK_MASK 0x0000FFFF
111
112#endif /* __KERNEL__ */
113
114#endif /* _ASM_NIOS2_THREAD_INFO_H */