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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Dikeba180fd2007-10-16 01:27:00 -07002 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * 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
Al Viro37185b32012-10-08 03:27:32 +010013#include <asm/ptrace.h>
14#include <registers.h>
15#include <sysdep/archsetjmp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
Richard Weinberger607647a2011-05-24 17:13:03 -070017#include <linux/prefetch.h>
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019struct mm_struct;
20
21struct thread_struct {
Jeff Dikeba180fd2007-10-16 01:27:00 -070022 struct task_struct *saved_task;
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 struct pt_regs regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 int singlestep_syscall;
25 void *fault_addr;
Jeff Dikefab95c52007-10-16 01:27:05 -070026 jmp_buf *fault_catcher;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 struct task_struct *prev_sched;
28 unsigned long temp_stack;
Jeff Dikefab95c52007-10-16 01:27:05 -070029 jmp_buf *exec_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 struct arch_thread arch;
Jeff Dike77bf4402007-10-16 01:26:58 -070031 jmp_buf switch_buf;
32 int mm_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 struct {
34 int op;
35 union {
36 struct {
37 int pid;
38 } fork, exec;
39 struct {
40 int (*proc)(void *);
41 void *arg;
42 } thread;
43 struct {
44 void (*proc)(void *);
45 void *arg;
46 } cb;
47 } u;
48 } request;
49};
50
51#define INIT_THREAD \
52{ \
Jeff Dikeba180fd2007-10-16 01:27:00 -070053 .regs = EMPTY_REGS, \
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 .fault_addr = NULL, \
55 .prev_sched = NULL, \
56 .temp_stack = 0, \
57 .exec_buf = NULL, \
58 .arch = INIT_ARCH_THREAD, \
59 .request = { 0 } \
60}
61
Jeff Dike77bf4402007-10-16 01:26:58 -070062static inline void release_thread(struct task_struct *task)
63{
64}
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
Paolo 'Blaisorblade' Giarrussoc16993d2005-05-01 08:58:54 -070067
Linus Torvalds1da177e2005-04-16 15:20:36 -070068extern unsigned long thread_saved_pc(struct task_struct *t);
69
70static inline void mm_copy_segments(struct mm_struct *from_mm,
71 struct mm_struct *new_mm)
72{
73}
74
75#define init_stack (init_thread_union.stack)
76
77/*
78 * User space process size: 3GB (default).
79 */
Jeff Dike536788f2008-02-08 04:22:07 -080080extern unsigned long task_size;
81
82#define TASK_SIZE (task_size)
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
David Howells922a70d2008-02-08 04:19:26 -080084#undef STACK_TOP
85#undef STACK_TOP_MAX
86
87extern unsigned long stacksizelim;
88
89#define STACK_ROOM (stacksizelim)
90#define STACK_TOP (TASK_SIZE - 2 * PAGE_SIZE)
91#define STACK_TOP_MAX STACK_TOP
92
Linus Torvalds1da177e2005-04-16 15:20:36 -070093/* This decides where the kernel will search for a free chunk of vm
94 * space during mmap's.
95 */
96#define TASK_UNMAPPED_BASE (0x40000000)
97
98extern void start_thread(struct pt_regs *regs, unsigned long entry,
99 unsigned long stack);
100
101struct cpuinfo_um {
102 unsigned long loops_per_jiffy;
103 int ipi_pipe[2];
104};
105
106extern struct cpuinfo_um boot_cpu_data;
107
108#define my_cpu_data cpu_data[smp_processor_id()]
109
110#ifdef CONFIG_SMP
111extern struct cpuinfo_um cpu_data[];
112#define current_cpu_data cpu_data[smp_processor_id()]
113#else
114#define cpu_data (&boot_cpu_data)
115#define current_cpu_data boot_cpu_data
116#endif
117
Allan Gravesfad1c452005-10-04 14:53:52 -0400118
Jeff Dike77bf4402007-10-16 01:26:58 -0700119#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
Jeff Dikec1127462008-02-04 22:30:36 -0800120extern unsigned long get_wchan(struct task_struct *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122#endif