tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
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 int forking;
21 int nsyscalls;
22 struct pt_regs regs;
23 unsigned long cr2;
24 int err;
25 unsigned long trap_no;
26 int singlestep_syscall;
27 void *fault_addr;
28 void *fault_catcher;
29 struct task_struct *prev_sched;
30 unsigned long temp_stack;
31 void *exec_buf;
32 struct arch_thread arch;
33 union {
34#ifdef CONFIG_MODE_TT
35 struct {
36 int extern_pid;
37 int tracing;
38 int switch_pipe[2];
39 int vm_seq;
40 } tt;
41#endif
42#ifdef CONFIG_MODE_SKAS
43 struct {
44 void *switch_buf;
45 void *fork_buf;
46 int mm_count;
47 } skas;
48#endif
49 } mode;
50 struct {
51 int op;
52 union {
53 struct {
54 int pid;
55 } fork, exec;
56 struct {
57 int (*proc)(void *);
58 void *arg;
59 } thread;
60 struct {
61 void (*proc)(void *);
62 void *arg;
63 } cb;
64 } u;
65 } request;
66};
67
68#define INIT_THREAD \
69{ \
70 .forking = 0, \
71 .nsyscalls = 0, \
72 .regs = EMPTY_REGS, \
73 .cr2 = 0, \
74 .err = 0, \
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);
92extern void prepare_to_copy(struct task_struct *tsk);
93
94extern unsigned long thread_saved_pc(struct task_struct *t);
95
96static inline void mm_copy_segments(struct mm_struct *from_mm,
97 struct mm_struct *new_mm)
98{
99}
100
101#define init_stack (init_thread_union.stack)
102
103/*
104 * User space process size: 3GB (default).
105 */
106extern unsigned long task_size;
107
108#define TASK_SIZE (task_size)
109
110/* This decides where the kernel will search for a free chunk of vm
111 * space during mmap's.
112 */
113#define TASK_UNMAPPED_BASE (0x40000000)
114
115extern void start_thread(struct pt_regs *regs, unsigned long entry,
116 unsigned long stack);
117
118struct cpuinfo_um {
119 unsigned long loops_per_jiffy;
120 int ipi_pipe[2];
121};
122
123extern struct cpuinfo_um boot_cpu_data;
124
125#define my_cpu_data cpu_data[smp_processor_id()]
126
127#ifdef CONFIG_SMP
128extern struct cpuinfo_um cpu_data[];
129#define current_cpu_data cpu_data[smp_processor_id()]
130#else
131#define cpu_data (&boot_cpu_data)
132#define current_cpu_data boot_cpu_data
133#endif
134
135#define KSTK_EIP(tsk) (PT_REGS_IP(&tsk->thread.regs))
136#define KSTK_ESP(tsk) (PT_REGS_SP(&tsk->thread.regs))
137#define get_wchan(p) (0)
138
139#endif
140
141/*
142 * Overrides for Emacs so that we follow Linus's tabbing style.
143 * Emacs will notice this stuff at the end of the file and automatically
144 * adjust the settings for this buffer only. This must remain at the end
145 * of the file.
146 * ---------------------------------------------------------------------------
147 * Local variables:
148 * c-file-style: "linux"
149 * End:
150 */