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
 
 
 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
 61static inline void mm_copy_segments(struct mm_struct *from_mm,
 62				    struct mm_struct *new_mm)
 63{
 64}
 65
 66/*
 67 * User space process size: 3GB (default).
 68 */
 69extern unsigned long task_size;
 70
 71#define TASK_SIZE (task_size)
 72
 73#undef STACK_TOP
 74#undef STACK_TOP_MAX
 75
 76extern unsigned long stacksizelim;
 77
 78#define STACK_ROOM	(stacksizelim)
 79#define STACK_TOP	(TASK_SIZE - 2 * PAGE_SIZE)
 80#define STACK_TOP_MAX	STACK_TOP
 81
 82/* This decides where the kernel will search for a free chunk of vm
 83 * space during mmap's.
 84 */
 85#define TASK_UNMAPPED_BASE	(0x40000000)
 86
 87extern void start_thread(struct pt_regs *regs, unsigned long entry, 
 88			 unsigned long stack);
 89
 90struct cpuinfo_um {
 91	unsigned long loops_per_jiffy;
 92	int ipi_pipe[2];
 
 
 
 
 
 93};
 94
 95extern struct cpuinfo_um boot_cpu_data;
 96
 97#define cpu_data (&boot_cpu_data)
 98#define current_cpu_data boot_cpu_data
 
 99
100#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
101extern unsigned long get_wchan(struct task_struct *p);
102
103#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