Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.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 "asm/ptrace.h"
14#include "registers.h"
15#include "sysdep/archsetjmp.h"
16
17struct mm_struct;
18
19struct thread_struct {
20 struct task_struct *saved_task;
21 /*
22 * This flag is set to 1 before calling do_fork (and analyzed in
23 * copy_thread) to mark that we are begin called from userspace (fork /
24 * vfork / clone), and reset to 0 after. It is left to 0 when called
25 * from kernelspace (i.e. kernel_thread() or fork_idle(),
26 * as of 2.6.11).
27 */
28 int forking;
29 int nsyscalls;
30 struct pt_regs regs;
31 int singlestep_syscall;
32 void *fault_addr;
33 jmp_buf *fault_catcher;
34 struct task_struct *prev_sched;
35 unsigned long temp_stack;
36 jmp_buf *exec_buf;
37 struct arch_thread arch;
38 jmp_buf switch_buf;
39 int mm_count;
40 struct {
41 int op;
42 union {
43 struct {
44 int pid;
45 } fork, exec;
46 struct {
47 int (*proc)(void *);
48 void *arg;
49 } thread;
50 struct {
51 void (*proc)(void *);
52 void *arg;
53 } cb;
54 } u;
55 } request;
56};
57
58#define INIT_THREAD \
59{ \
60 .forking = 0, \
61 .nsyscalls = 0, \
62 .regs = EMPTY_REGS, \
63 .fault_addr = NULL, \
64 .prev_sched = NULL, \
65 .temp_stack = 0, \
66 .exec_buf = NULL, \
67 .arch = INIT_ARCH_THREAD, \
68 .request = { 0 } \
69}
70
71typedef struct {
72 unsigned long seg;
73} mm_segment_t;
74
75extern struct task_struct *alloc_task_struct(void);
76
77static inline void release_thread(struct task_struct *task)
78{
79}
80
81extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
82
83static inline void prepare_to_copy(struct task_struct *tsk)
84{
85}
86
87
88extern unsigned long thread_saved_pc(struct task_struct *t);
89
90static inline void mm_copy_segments(struct mm_struct *from_mm,
91 struct mm_struct *new_mm)
92{
93}
94
95#define init_stack (init_thread_union.stack)
96
97/*
98 * User space process size: 3GB (default).
99 */
100extern unsigned long task_size;
101
102#define TASK_SIZE (task_size)
103
104/* This decides where the kernel will search for a free chunk of vm
105 * space during mmap's.
106 */
107#define TASK_UNMAPPED_BASE (0x40000000)
108
109extern void start_thread(struct pt_regs *regs, unsigned long entry,
110 unsigned long stack);
111
112struct cpuinfo_um {
113 unsigned long loops_per_jiffy;
114 int ipi_pipe[2];
115};
116
117extern struct cpuinfo_um boot_cpu_data;
118
119#define my_cpu_data cpu_data[smp_processor_id()]
120
121#ifdef CONFIG_SMP
122extern struct cpuinfo_um cpu_data[];
123#define current_cpu_data cpu_data[smp_processor_id()]
124#else
125#define cpu_data (&boot_cpu_data)
126#define current_cpu_data boot_cpu_data
127#endif
128
129
130#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
131#define get_wchan(p) (0)
132
133#endif