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
17#include <linux/prefetch.h>
18
19struct mm_struct;
20
21struct thread_struct {
22 struct pt_regs regs;
23 struct pt_regs *segv_regs;
24 int singlestep_syscall;
25 void *fault_addr;
26 jmp_buf *fault_catcher;
27 struct task_struct *prev_sched;
28 struct arch_thread arch;
29 jmp_buf switch_buf;
30 struct {
31 int op;
32 union {
33 struct {
34 int pid;
35 } fork, exec;
36 struct {
37 int (*proc)(void *);
38 void *arg;
39 } thread;
40 struct {
41 void (*proc)(void *);
42 void *arg;
43 } cb;
44 } u;
45 } request;
46};
47
48#define INIT_THREAD \
49{ \
50 .regs = EMPTY_REGS, \
51 .fault_addr = NULL, \
52 .prev_sched = NULL, \
53 .arch = INIT_ARCH_THREAD, \
54 .request = { 0 } \
55}
56
57static inline void release_thread(struct task_struct *task)
58{
59}
60
61static inline void mm_copy_segments(struct mm_struct *from_mm,
62 struct mm_struct *new_mm)
63{
64}
65
66#define init_stack (init_thread_union.stack)
67
68/*
69 * User space process size: 3GB (default).
70 */
71extern unsigned long task_size;
72
73#define TASK_SIZE (task_size)
74
75#undef STACK_TOP
76#undef STACK_TOP_MAX
77
78extern unsigned long stacksizelim;
79
80#define STACK_ROOM (stacksizelim)
81#define STACK_TOP (TASK_SIZE - 2 * PAGE_SIZE)
82#define STACK_TOP_MAX STACK_TOP
83
84/* This decides where the kernel will search for a free chunk of vm
85 * space during mmap's.
86 */
87#define TASK_UNMAPPED_BASE (0x40000000)
88
89extern void start_thread(struct pt_regs *regs, unsigned long entry,
90 unsigned long stack);
91
92struct cpuinfo_um {
93 unsigned long loops_per_jiffy;
94 int ipi_pipe[2];
95};
96
97extern struct cpuinfo_um boot_cpu_data;
98
99#define cpu_data (&boot_cpu_data)
100#define current_cpu_data boot_cpu_data
101
102#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
103extern unsigned long get_wchan(struct task_struct *p);
104
105#endif