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