Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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 <sysdep/archsetjmp.h>
15
16#include <linux/prefetch.h>
17
18#include <asm/cpufeatures.h>
19
20struct mm_struct;
21
22struct thread_struct {
23 struct pt_regs *segv_regs;
24 struct task_struct *prev_sched;
25 struct arch_thread arch;
26 jmp_buf switch_buf;
27 struct {
28 struct {
29 int (*proc)(void *);
30 void *arg;
31 } thread;
32 } request;
33
34 /* Contains variable sized FP registers */
35 struct pt_regs regs;
36};
37
38#define INIT_THREAD \
39{ \
40 .regs = EMPTY_REGS, \
41 .prev_sched = NULL, \
42 .arch = INIT_ARCH_THREAD, \
43 .request = { } \
44}
45
46/*
47 * User space process size: 3GB (default).
48 */
49extern unsigned long task_size;
50
51#define TASK_SIZE (task_size)
52
53#undef STACK_TOP
54#undef STACK_TOP_MAX
55
56extern unsigned long stacksizelim;
57
58#define STACK_ROOM (stacksizelim)
59#define STACK_TOP (TASK_SIZE - 2 * PAGE_SIZE)
60#define STACK_TOP_MAX STACK_TOP
61
62/* This decides where the kernel will search for a free chunk of vm
63 * space during mmap's.
64 */
65#define TASK_UNMAPPED_BASE (0x40000000)
66
67extern void start_thread(struct pt_regs *regs, unsigned long entry,
68 unsigned long stack);
69
70struct cpuinfo_um {
71 unsigned long loops_per_jiffy;
72 int ipi_pipe[2];
73 int cache_alignment;
74 union {
75 __u32 x86_capability[NCAPINTS + NBUGINTS];
76 unsigned long x86_capability_alignment;
77 };
78};
79
80extern struct cpuinfo_um boot_cpu_data;
81
82#define cpu_data(cpu) boot_cpu_data
83#define current_cpu_data boot_cpu_data
84#define cache_line_size() (boot_cpu_data.cache_alignment)
85
86#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
87extern unsigned long __get_wchan(struct task_struct *p);
88
89#endif