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

 
  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
 71static inline void release_thread(struct task_struct *task)
 72{
 73}
 74
 75extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
 76
 77extern unsigned long thread_saved_pc(struct task_struct *t);
 78
 79static inline void mm_copy_segments(struct mm_struct *from_mm,
 80				    struct mm_struct *new_mm)
 81{
 82}
 83
 84#define init_stack	(init_thread_union.stack)
 85
 86/*
 87 * User space process size: 3GB (default).
 88 */
 89extern unsigned long task_size;
 90
 91#define TASK_SIZE (task_size)
 92
 93#undef STACK_TOP
 94#undef STACK_TOP_MAX
 95
 96extern unsigned long stacksizelim;
 97
 98#define STACK_ROOM	(stacksizelim)
 99#define STACK_TOP	(TASK_SIZE - 2 * PAGE_SIZE)
100#define STACK_TOP_MAX	STACK_TOP
101
102/* This decides where the kernel will search for a free chunk of vm
103 * space during mmap's.
104 */
105#define TASK_UNMAPPED_BASE	(0x40000000)
106
107extern void start_thread(struct pt_regs *regs, unsigned long entry, 
108			 unsigned long stack);
109
110struct cpuinfo_um {
111	unsigned long loops_per_jiffy;
112	int ipi_pipe[2];
 
 
 
 
 
113};
114
115extern struct cpuinfo_um boot_cpu_data;
116
117#define my_cpu_data		cpu_data[smp_processor_id()]
118
119#ifdef CONFIG_SMP
120extern struct cpuinfo_um cpu_data[];
121#define current_cpu_data cpu_data[smp_processor_id()]
122#else
123#define cpu_data (&boot_cpu_data)
124#define current_cpu_data boot_cpu_data
125#endif
126
127
128#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
129extern unsigned long get_wchan(struct task_struct *p);
130
131#endif