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 <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 regs;
 24	struct pt_regs *segv_regs;
 25	int singlestep_syscall;
 26	void *fault_addr;
 27	jmp_buf *fault_catcher;
 28	struct task_struct *prev_sched;
 29	struct arch_thread arch;
 30	jmp_buf switch_buf;
 31	struct {
 32		int op;
 33		union {
 34			struct {
 35				int pid;
 36			} fork, exec;
 37			struct {
 38				int (*proc)(void *);
 39				void *arg;
 40			} thread;
 41			struct {
 42				void (*proc)(void *);
 43				void *arg;
 44			} cb;
 45		} u;
 46	} request;
 
 
 
 47};
 48
 49#define INIT_THREAD \
 50{ \
 51	.regs		   	= EMPTY_REGS,	\
 52	.fault_addr		= NULL, \
 53	.prev_sched		= NULL, \
 54	.arch			= INIT_ARCH_THREAD, \
 55	.request		= { 0 } \
 56}
 57
 58/*
 59 * User space process size: 3GB (default).
 60 */
 61extern unsigned long task_size;
 62
 63#define TASK_SIZE (task_size)
 64
 65#undef STACK_TOP
 66#undef STACK_TOP_MAX
 67
 68extern unsigned long stacksizelim;
 69
 70#define STACK_ROOM	(stacksizelim)
 71#define STACK_TOP	(TASK_SIZE - 2 * PAGE_SIZE)
 72#define STACK_TOP_MAX	STACK_TOP
 73
 74/* This decides where the kernel will search for a free chunk of vm
 75 * space during mmap's.
 76 */
 77#define TASK_UNMAPPED_BASE	(0x40000000)
 78
 79extern void start_thread(struct pt_regs *regs, unsigned long entry, 
 80			 unsigned long stack);
 81
 82struct cpuinfo_um {
 83	unsigned long loops_per_jiffy;
 84	int ipi_pipe[2];
 85	int cache_alignment;
 86	union {
 87		__u32		x86_capability[NCAPINTS + NBUGINTS];
 88		unsigned long	x86_capability_alignment;
 89	};
 90};
 91
 92extern struct cpuinfo_um boot_cpu_data;
 93
 94#define cpu_data (&boot_cpu_data)
 95#define current_cpu_data boot_cpu_data
 96#define cache_line_size()	(boot_cpu_data.cache_alignment)
 97
 98extern unsigned long get_thread_reg(int reg, jmp_buf *buf);
 99#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
100extern unsigned long __get_wchan(struct task_struct *p);
101
102#endif