Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __UM_PROCESSOR_GENERIC_H
7#define __UM_PROCESSOR_GENERIC_H
8
9struct pt_regs;
10
11struct task_struct;
12
13#include "linux/config.h"
14#include "asm/ptrace.h"
15#include "choose-mode.h"
16
17struct mm_struct;
18
19struct thread_struct {
20 /* This flag is set to 1 before calling do_fork (and analyzed in
21 * copy_thread) to mark that we are begin called from userspace (fork /
22 * vfork / clone), and reset to 0 after. It is left to 0 when called
23 * from kernelspace (i.e. kernel_thread() or fork_idle(), as of 2.6.11). */
24 int forking;
25 int nsyscalls;
26 struct pt_regs regs;
27 int singlestep_syscall;
28 void *fault_addr;
29 void *fault_catcher;
30 struct task_struct *prev_sched;
31 unsigned long temp_stack;
32 void *exec_buf;
33 struct arch_thread arch;
34 union {
35#ifdef CONFIG_MODE_TT
36 struct {
37 int extern_pid;
38 int tracing;
39 int switch_pipe[2];
40 int vm_seq;
41 } tt;
42#endif
43#ifdef CONFIG_MODE_SKAS
44 struct {
45 void *switch_buf;
46 void *fork_buf;
47 int mm_count;
48 } skas;
49#endif
50 } mode;
51 struct {
52 int op;
53 union {
54 struct {
55 int pid;
56 } fork, exec;
57 struct {
58 int (*proc)(void *);
59 void *arg;
60 } thread;
61 struct {
62 void (*proc)(void *);
63 void *arg;
64 } cb;
65 } u;
66 } request;
67};
68
69#define INIT_THREAD \
70{ \
71 .forking = 0, \
72 .nsyscalls = 0, \
73 .regs = EMPTY_REGS, \
74 .fault_addr = NULL, \
75 .prev_sched = NULL, \
76 .temp_stack = 0, \
77 .exec_buf = NULL, \
78 .arch = INIT_ARCH_THREAD, \
79 .request = { 0 } \
80}
81
82typedef struct {
83 unsigned long seg;
84} mm_segment_t;
85
86extern struct task_struct *alloc_task_struct(void);
87
88extern void release_thread(struct task_struct *);
89extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
90extern void dump_thread(struct pt_regs *regs, struct user *u);
91
92static inline void prepare_to_copy(struct task_struct *tsk)
93{
94}
95
96
97extern unsigned long thread_saved_pc(struct task_struct *t);
98
99static inline void mm_copy_segments(struct mm_struct *from_mm,
100 struct mm_struct *new_mm)
101{
102}
103
104#define init_stack (init_thread_union.stack)
105
106/*
107 * User space process size: 3GB (default).
108 */
109extern unsigned long task_size;
110
111#define TASK_SIZE (task_size)
112
113/* This decides where the kernel will search for a free chunk of vm
114 * space during mmap's.
115 */
116#define TASK_UNMAPPED_BASE (0x40000000)
117
118extern void start_thread(struct pt_regs *regs, unsigned long entry,
119 unsigned long stack);
120
121struct cpuinfo_um {
122 unsigned long loops_per_jiffy;
123 int ipi_pipe[2];
124};
125
126extern struct cpuinfo_um boot_cpu_data;
127
128#define my_cpu_data cpu_data[smp_processor_id()]
129
130#ifdef CONFIG_SMP
131extern struct cpuinfo_um cpu_data[];
132#define current_cpu_data cpu_data[smp_processor_id()]
133#else
134#define cpu_data (&boot_cpu_data)
135#define current_cpu_data boot_cpu_data
136#endif
137
138#define KSTK_EIP(tsk) (PT_REGS_IP(&tsk->thread.regs))
139#define KSTK_ESP(tsk) (PT_REGS_SP(&tsk->thread.regs))
140#define get_wchan(p) (0)
141
142#endif
143
144/*
145 * Overrides for Emacs so that we follow Linus's tabbing style.
146 * Emacs will notice this stuff at the end of the file and automatically
147 * adjust the settings for this buffer only. This must remain at the end
148 * of the file.
149 * ---------------------------------------------------------------------------
150 * Local variables:
151 * c-file-style: "linux"
152 * End:
153 */