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

  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 <registers.h>
 15#include <sysdep/archsetjmp.h>
 16
 17#include <linux/prefetch.h>
 18
 19#include <asm/cpufeatures.h>
 20
 21struct mm_struct;
 22
 23struct thread_struct {
 24	struct pt_regs regs;
 25	struct pt_regs *segv_regs;
 26	int singlestep_syscall;
 27	void *fault_addr;
 28	jmp_buf *fault_catcher;
 29	struct task_struct *prev_sched;
 30	struct arch_thread arch;
 31	jmp_buf switch_buf;
 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	.arch			= INIT_ARCH_THREAD, \
 56	.request		= { 0 } \
 57}
 58
 59static inline void release_thread(struct task_struct *task)
 60{
 61}
 62
 63static inline void mm_copy_segments(struct mm_struct *from_mm,
 64				    struct mm_struct *new_mm)
 65{
 66}
 67
 68/*
 69 * User space process size: 3GB (default).
 70 */
 71extern unsigned long task_size;
 72
 73#define TASK_SIZE (task_size)
 74
 75#undef STACK_TOP
 76#undef STACK_TOP_MAX
 77
 78extern unsigned long stacksizelim;
 79
 80#define STACK_ROOM	(stacksizelim)
 81#define STACK_TOP	(TASK_SIZE - 2 * PAGE_SIZE)
 82#define STACK_TOP_MAX	STACK_TOP
 83
 84/* This decides where the kernel will search for a free chunk of vm
 85 * space during mmap's.
 86 */
 87#define TASK_UNMAPPED_BASE	(0x40000000)
 88
 89extern void start_thread(struct pt_regs *regs, unsigned long entry, 
 90			 unsigned long stack);
 91
 92struct cpuinfo_um {
 93	unsigned long loops_per_jiffy;
 94	int ipi_pipe[2];
 95	int cache_alignment;
 96	union {
 97		__u32		x86_capability[NCAPINTS + NBUGINTS];
 98		unsigned long	x86_capability_alignment;
 99	};
100};
101
102extern struct cpuinfo_um boot_cpu_data;
103
104#define cpu_data (&boot_cpu_data)
105#define current_cpu_data boot_cpu_data
106#define cache_line_size()	(boot_cpu_data.cache_alignment)
107
108#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
109extern unsigned long get_wchan(struct task_struct *p);
110
111#endif