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	/*
 24	 * This flag is set to 1 before calling do_fork (and analyzed in
 25	 * copy_thread) to mark that we are begin called from userspace (fork /
 26	 * vfork / clone), and reset to 0 after. It is left to 0 when called
 27	 * from kernelspace (i.e. kernel_thread() or fork_idle(),
 28	 * as of 2.6.11).
 29	 */
 30	int forking;
 31	struct pt_regs regs;
 32	int singlestep_syscall;
 33	void *fault_addr;
 34	jmp_buf *fault_catcher;
 35	struct task_struct *prev_sched;
 36	unsigned long temp_stack;
 37	jmp_buf *exec_buf;
 38	struct arch_thread arch;
 39	jmp_buf switch_buf;
 40	int mm_count;
 41	struct {
 42		int op;
 43		union {
 44			struct {
 45				int pid;
 46			} fork, exec;
 47			struct {
 48				int (*proc)(void *);
 49				void *arg;
 50			} thread;
 51			struct {
 52				void (*proc)(void *);
 53				void *arg;
 54			} cb;
 55		} u;
 56	} request;
 
 
 
 57};
 58
 59#define INIT_THREAD \
 60{ \
 61	.forking		= 0, \
 62	.regs		   	= EMPTY_REGS,	\
 63	.fault_addr		= NULL, \
 64	.prev_sched		= NULL, \
 65	.temp_stack		= 0, \
 66	.exec_buf		= NULL, \
 67	.arch			= INIT_ARCH_THREAD, \
 68	.request		= { 0 } \
 69}
 70
 71extern struct task_struct *alloc_task_struct_node(int node);
 72
 73static inline void release_thread(struct task_struct *task)
 74{
 75}
 76
 77extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
 78
 79static inline void prepare_to_copy(struct task_struct *tsk)
 80{
 81}
 82
 83
 84extern unsigned long thread_saved_pc(struct task_struct *t);
 85
 86static inline void mm_copy_segments(struct mm_struct *from_mm,
 87				    struct mm_struct *new_mm)
 88{
 89}
 90
 91#define init_stack	(init_thread_union.stack)
 92
 93/*
 94 * User space process size: 3GB (default).
 95 */
 96extern unsigned long task_size;
 97
 98#define TASK_SIZE (task_size)
 99
100#undef STACK_TOP
101#undef STACK_TOP_MAX
102
103extern unsigned long stacksizelim;
104
105#define STACK_ROOM	(stacksizelim)
106#define STACK_TOP	(TASK_SIZE - 2 * PAGE_SIZE)
107#define STACK_TOP_MAX	STACK_TOP
108
109/* This decides where the kernel will search for a free chunk of vm
110 * space during mmap's.
111 */
112#define TASK_UNMAPPED_BASE	(0x40000000)
113
114extern void start_thread(struct pt_regs *regs, unsigned long entry, 
115			 unsigned long stack);
116
117struct cpuinfo_um {
118	unsigned long loops_per_jiffy;
119	int ipi_pipe[2];
 
 
 
 
 
120};
121
122extern struct cpuinfo_um boot_cpu_data;
123
124#define my_cpu_data		cpu_data[smp_processor_id()]
125
126#ifdef CONFIG_SMP
127extern struct cpuinfo_um cpu_data[];
128#define current_cpu_data cpu_data[smp_processor_id()]
129#else
130#define cpu_data (&boot_cpu_data)
131#define current_cpu_data boot_cpu_data
132#endif
133
134
135#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
136extern unsigned long get_wchan(struct task_struct *p);
137
138#endif

 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