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authorDavid S. Miller <davem@davemloft.net>2008-09-08 19:59:05 -0400
committerDavid S. Miller <davem@davemloft.net>2008-09-08 19:59:05 -0400
commit17dce5dfe38ae2fb359b61e855f5d8a3a8b7892b (patch)
tree88bb1fcf84f9ebfa4299c9a8dcd9e6330b358446 /arch/blackfin/include/asm/thread_info.h
parent712d6954e3998d0de2840d8130941e8042541246 (diff)
parent82a28c794f27aac17d7a3ebd7f14d731a11a5532 (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: net/mac80211/mlme.c
Diffstat (limited to 'arch/blackfin/include/asm/thread_info.h')
-rw-r--r--arch/blackfin/include/asm/thread_info.h135
1 files changed, 135 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/thread_info.h b/arch/blackfin/include/asm/thread_info.h
new file mode 100644
index 000000000000..642769329d12
--- /dev/null
+++ b/arch/blackfin/include/asm/thread_info.h
@@ -0,0 +1,135 @@
1/*
2 * File: include/asm-blackfin/thread_info.h
3 * Based on: include/asm-m68knommu/thread_info.h
4 * Author: LG Soft India
5 * Copyright (C) 2004-2005 Analog Devices Inc.
6 * Created: Tue Sep 21 2004
7 * Description: Blackfin low-level thread information
8 * Modified:
9 * Bugs: Enter bugs at http://blackfin.uclinux.org/
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING.
23 * If not, write to the Free Software Foundation,
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 */
26
27#ifndef _ASM_THREAD_INFO_H
28#define _ASM_THREAD_INFO_H
29
30#include <asm/page.h>
31#include <asm/entry.h>
32#include <asm/l1layout.h>
33#include <linux/compiler.h>
34
35#ifdef __KERNEL__
36
37/* Thread Align Mask to reach to the top of the stack
38 * for any process
39 */
40#define ALIGN_PAGE_MASK 0xffffe000
41
42/*
43 * Size of kernel stack for each process. This must be a power of 2...
44 */
45#define THREAD_SIZE_ORDER 1
46#define THREAD_SIZE 8192 /* 2 pages */
47
48#ifndef __ASSEMBLY__
49
50typedef unsigned long mm_segment_t;
51
52/*
53 * low level task data.
54 * If you change this, change the TI_* offsets below to match.
55 */
56
57struct thread_info {
58 struct task_struct *task; /* main task structure */
59 struct exec_domain *exec_domain; /* execution domain */
60 unsigned long flags; /* low level flags */
61 int cpu; /* cpu we're on */
62 int preempt_count; /* 0 => preemptable, <0 => BUG */
63 mm_segment_t addr_limit; /* address limit */
64 struct restart_block restart_block;
65 struct l1_scratch_task_info l1_task_info;
66};
67
68/*
69 * macros/functions for gaining access to the thread information structure
70 */
71#define INIT_THREAD_INFO(tsk) \
72{ \
73 .task = &tsk, \
74 .exec_domain = &default_exec_domain, \
75 .flags = 0, \
76 .cpu = 0, \
77 .preempt_count = 1, \
78 .restart_block = { \
79 .fn = do_no_restart_syscall, \
80 }, \
81}
82#define init_thread_info (init_thread_union.thread_info)
83#define init_stack (init_thread_union.stack)
84
85/* Given a task stack pointer, you can find its corresponding
86 * thread_info structure just by masking it to the THREAD_SIZE
87 * boundary (currently 8K as you can see above).
88 */
89__attribute_const__
90static inline struct thread_info *current_thread_info(void)
91{
92 struct thread_info *ti;
93 __asm__("%0 = sp;": "=&d"(ti):
94 );
95 return (struct thread_info *)((long)ti & ~((long)THREAD_SIZE-1));
96}
97
98#endif /* __ASSEMBLY__ */
99
100/*
101 * Offsets in thread_info structure, used in assembly code
102 */
103#define TI_TASK 0
104#define TI_EXECDOMAIN 4
105#define TI_FLAGS 8
106#define TI_CPU 12
107#define TI_PREEMPT 16
108
109#define PREEMPT_ACTIVE 0x4000000
110
111/*
112 * thread information flag bit numbers
113 */
114#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
115#define TIF_SIGPENDING 1 /* signal pending */
116#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
117#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
118 TIF_NEED_RESCHED */
119#define TIF_MEMDIE 4
120#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
121#define TIF_FREEZE 6 /* is freezing for suspend */
122
123/* as above, but as bit values */
124#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
125#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
126#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
127#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
128#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
129#define _TIF_FREEZE (1<<TIF_FREEZE)
130
131#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
132
133#endif /* __KERNEL__ */
134
135#endif /* _ASM_THREAD_INFO_H */