projects/linux·blob 61844250 · refs

136 lines · 2.8 KiB

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 struct pt_regs regs;
30 int singlestep_syscall;
31 void *fault_addr;
32 jmp_buf *fault_catcher;
33 struct task_struct *prev_sched;
34 unsigned long temp_stack;
35 jmp_buf *exec_buf;
36 struct arch_thread arch;
37 jmp_buf switch_buf;
38 int mm_count;
39 struct {
40 int op;
41 union {
42 struct {
43 int pid;
44 } fork, exec;
45 struct {
46 int (*proc)(void *);
47 void *arg;
48 } thread;
49 struct {
50 void (*proc)(void *);
51 void *arg;
52 } cb;
53 } u;
54 } request;
55};
56
57#define INIT_THREAD \
58{ \
59 .forking = 0, \
60 .regs = EMPTY_REGS, \
61 .fault_addr = NULL, \
62 .prev_sched = NULL, \
63 .temp_stack = 0, \
64 .exec_buf = NULL, \
65 .arch = INIT_ARCH_THREAD, \
66 .request = { 0 } \
67}
68
69extern struct task_struct *alloc_task_struct(void);
70
71static inline void release_thread(struct task_struct *task)
72{
73}
74
75extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
76
77static inline void prepare_to_copy(struct task_struct *tsk)
78{
79}
80
81
82extern unsigned long thread_saved_pc(struct task_struct *t);
83
84static inline void mm_copy_segments(struct mm_struct *from_mm,
85 struct mm_struct *new_mm)
86{
87}
88
89#define init_stack (init_thread_union.stack)
90
91/*
92 * User space process size: 3GB (default).
93 */
94extern unsigned long task_size;
95
96#define TASK_SIZE (task_size)
97
98#undef STACK_TOP
99#undef STACK_TOP_MAX
100
101extern unsigned long stacksizelim;
102
103#define STACK_ROOM (stacksizelim)
104#define STACK_TOP (TASK_SIZE - 2 * PAGE_SIZE)
105#define STACK_TOP_MAX STACK_TOP
106
107/* This decides where the kernel will search for a free chunk of vm
108 * space during mmap's.
109 */
110#define TASK_UNMAPPED_BASE (0x40000000)
111
112extern void start_thread(struct pt_regs *regs, unsigned long entry,
113 unsigned long stack);
114
115struct cpuinfo_um {
116 unsigned long loops_per_jiffy;
117 int ipi_pipe[2];
118};
119
120extern struct cpuinfo_um boot_cpu_data;
121
122#define my_cpu_data cpu_data[smp_processor_id()]
123
124#ifdef CONFIG_SMP
125extern struct cpuinfo_um cpu_data[];
126#define current_cpu_data cpu_data[smp_processor_id()]
127#else
128#define cpu_data (&boot_cpu_data)
129#define current_cpu_data boot_cpu_data
130#endif
131
132
133#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
134extern unsigned long get_wchan(struct task_struct *p);
135
136#endif