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
61extern unsigned long thread_saved_pc(struct task_struct *t);
62
63static inline void mm_copy_segments(struct mm_struct *from_mm,
64				    struct mm_struct *new_mm)
65{
66}
67
68#define init_stack	(init_thread_union.stack)
69
70/*
71 * User space process size: 3GB (default).
72 */
73extern unsigned long task_size;
74
75#define TASK_SIZE (task_size)
76
77#undef STACK_TOP
78#undef STACK_TOP_MAX
79
80extern unsigned long stacksizelim;
81
82#define STACK_ROOM	(stacksizelim)
83#define STACK_TOP	(TASK_SIZE - 2 * PAGE_SIZE)
84#define STACK_TOP_MAX	STACK_TOP
85
86/* This decides where the kernel will search for a free chunk of vm
87 * space during mmap's.
88 */
89#define TASK_UNMAPPED_BASE	(0x40000000)
90
91extern void start_thread(struct pt_regs *regs, unsigned long entry,
92			 unsigned long stack);
93
94struct cpuinfo_um {
95	unsigned long loops_per_jiffy;
96	int ipi_pipe[2];
97};
98
99extern struct cpuinfo_um boot_cpu_data;
100
101#define cpu_data (&boot_cpu_data)
102#define current_cpu_data boot_cpu_data
103
104#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
105extern unsigned long get_wchan(struct task_struct *p);
106
107#endif
108