ia64/linux-2.6.18-xen.hg

view include/asm-v850/thread_info.h @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
1 /*
2 * include/asm-v850/thread_info.h -- v850 low-level thread information
3 *
4 * Copyright (C) 2002 NEC Corporation
5 * Copyright (C) 2002 Miles Bader <miles@gnu.org>
6 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
7 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
8 *
9 * This file is subject to the terms and conditions of the GNU General
10 * Public License. See the file COPYING in the main directory of this
11 * archive for more details.
12 *
13 * This file was derived from the PPC version, include/asm-ppc/thread_info.h
14 * which was adapted from the i386 version by Paul Mackerras
15 */
17 #ifndef __V850_THREAD_INFO_H__
18 #define __V850_THREAD_INFO_H__
20 #ifdef __KERNEL__
22 #ifndef __ASSEMBLY__
24 /*
25 * low level task data.
26 * If you change this, change the TI_* offsets below to match.
27 */
28 struct thread_info {
29 struct task_struct *task; /* main task structure */
30 struct exec_domain *exec_domain; /* execution domain */
31 unsigned long flags; /* low level flags */
32 int cpu; /* cpu we're on */
33 int preempt_count; /* 0 => preemptable,
34 <0 => BUG */
35 struct restart_block restart_block;
36 };
38 #define INIT_THREAD_INFO(tsk) \
39 { \
40 .task = &tsk, \
41 .exec_domain = &default_exec_domain, \
42 .flags = 0, \
43 .cpu = 0, \
44 .preempt_count = 1, \
45 .restart_block = { \
46 .fn = do_no_restart_syscall, \
47 }, \
48 }
50 #define init_thread_info (init_thread_union.thread_info)
51 #define init_stack (init_thread_union.stack)
53 /*
54 * macros/functions for gaining access to the thread information structure
55 */
57 /* thread information allocation */
58 #define alloc_thread_info(tsk) ((struct thread_info *) \
59 __get_free_pages(GFP_KERNEL, 1))
60 #define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
62 #endif /* __ASSEMBLY__ */
65 /*
66 * Offsets in thread_info structure, used in assembly code
67 */
68 #define TI_TASK 0
69 #define TI_EXECDOMAIN 4
70 #define TI_FLAGS 8
71 #define TI_CPU 12
72 #define TI_PREEMPT 16
74 #define PREEMPT_ACTIVE 0x4000000
76 /*
77 * thread information flag bit numbers
78 */
79 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
80 #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
81 #define TIF_SIGPENDING 2 /* signal pending */
82 #define TIF_NEED_RESCHED 3 /* rescheduling necessary */
83 #define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
84 TIF_NEED_RESCHED */
85 #define TIF_MEMDIE 5
87 /* as above, but as bit values */
88 #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
89 #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
90 #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
91 #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
92 #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
95 /* Size of kernel stack for each process. */
96 #define THREAD_SIZE 0x2000
98 /* The alignment of kernel threads, with thread_info structures at their
99 base. Thus, a pointer for a task's task structure can be derived from
100 its kernel stack pointer. */
101 #define THREAD_ALIGNMENT THREAD_SIZE
102 #define THREAD_MASK (-THREAD_ALIGNMENT)
105 #ifdef __ASSEMBLY__
107 /* Put a pointer to the current thread_info structure into REG. Note that
108 this definition requires THREAD_MASK to be representable as a signed
109 16-bit value. */
110 #define GET_CURRENT_THREAD(reg) \
111 /* Use `addi' and then `and' instead of just `andi', because \
112 `addi' sign-extends the immediate value, whereas `andi' \
113 zero-extends it. */ \
114 addi THREAD_MASK, r0, reg; \
115 and sp, reg
117 #else
119 /* Return a pointer to the current thread_info structure. */
120 static inline struct thread_info *current_thread_info (void)
121 {
122 register unsigned long sp __asm__ ("sp");
123 return (struct thread_info *)(sp & THREAD_MASK);
124 }
126 #endif /* __ASSEMBLY__ */
129 #endif /* __KERNEL__ */
131 #endif /* __V850_THREAD_INFO_H__ */