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 struct task_struct *saved_task;
25 int forking;
26 int nsyscalls;
27 struct pt_regs regs;
28 int singlestep_syscall;
29 void *fault_addr;
30 void *fault_catcher;
31 struct task_struct *prev_sched;
32 unsigned long temp_stack;
33 void *exec_buf;
34 struct arch_thread arch;
35 union {
36#ifdef CONFIG_MODE_TT
37 struct {
38 int extern_pid;
39 int tracing;
40 int switch_pipe[2];
41 int vm_seq;
42 } tt;
43#endif
44#ifdef CONFIG_MODE_SKAS
45 struct {
46 void *switch_buf;
47 void *fork_buf;
48 int mm_count;
49 } skas;
50#endif
51 } mode;
52 struct {
53 int op;
54 union {
55 struct {
56 int pid;
57 } fork, exec;
58 struct {
59 int (*proc)(void *);
60 void *arg;
61 } thread;
62 struct {
63 void (*proc)(void *);
64 void *arg;
65 } cb;
66 } u;
67 } request;
68};
69
70#define INIT_THREAD \
71{ \
72 .forking = 0, \
73 .nsyscalls = 0, \
74 .regs = EMPTY_REGS, \
75 .fault_addr = NULL, \
76 .prev_sched = NULL, \
77 .temp_stack = 0, \
78 .exec_buf = NULL, \
79 .arch = INIT_ARCH_THREAD, \
80 .request = { 0 } \
81}
82
83typedef struct {
84 unsigned long seg;
85} mm_segment_t;
86
87extern struct task_struct *alloc_task_struct(void);
88
89extern void release_thread(struct task_struct *);
90extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
91extern void dump_thread(struct pt_regs *regs, struct user *u);
92
93static inline void prepare_to_copy(struct task_struct *tsk)
94{
95}
96
97
98extern unsigned long thread_saved_pc(struct task_struct *t);
99
100static inline void mm_copy_segments(struct mm_struct *from_mm,
101 struct mm_struct *new_mm)
102{
103}
104
105#define init_stack (init_thread_union.stack)
106
107/*
108 * User space process size: 3GB (default).
109 */
110extern unsigned long task_size;
111
112#define TASK_SIZE (task_size)
113
114/* This decides where the kernel will search for a free chunk of vm
115 * space during mmap's.
116 */
117#define TASK_UNMAPPED_BASE (0x40000000)
118
119extern void start_thread(struct pt_regs *regs, unsigned long entry,
120 unsigned long stack);
121
122struct cpuinfo_um {
123 unsigned long loops_per_jiffy;
124 int ipi_pipe[2];
125};
126
127extern struct cpuinfo_um boot_cpu_data;
128
129#define my_cpu_data cpu_data[smp_processor_id()]
130
131#ifdef CONFIG_SMP
132extern struct cpuinfo_um cpu_data[];
133#define current_cpu_data cpu_data[smp_processor_id()]
134#else
135#define cpu_data (&boot_cpu_data)
136#define current_cpu_data boot_cpu_data
137#endif
138
139#define KSTK_EIP(tsk) (PT_REGS_IP(&tsk->thread.regs))
140#define KSTK_ESP(tsk) (PT_REGS_SP(&tsk->thread.regs))
141#define get_wchan(p) (0)
142
143#endif
144
145/*
146 * Overrides for Emacs so that we follow Linus's tabbing style.
147 * Emacs will notice this stuff at the end of the file and automatically
148 * adjust the settings for this buffer only. This must remain at the end
149 * of the file.
150 * ---------------------------------------------------------------------------
151 * Local variables:
152 * c-file-style: "linux"
153 * End:
154 */