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	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
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 57/*
 58 * User space process size: 3GB (default).
 59 */
 60extern unsigned long task_size;
 61
 62#define TASK_SIZE (task_size)
 63
 64#undef STACK_TOP
 65#undef STACK_TOP_MAX
 66
 67extern unsigned long stacksizelim;
 68
 69#define STACK_ROOM	(stacksizelim)
 70#define STACK_TOP	(TASK_SIZE - 2 * PAGE_SIZE)
 71#define STACK_TOP_MAX	STACK_TOP
 72
 73/* This decides where the kernel will search for a free chunk of vm
 74 * space during mmap's.
 75 */
 76#define TASK_UNMAPPED_BASE	(0x40000000)
 77
 78extern void start_thread(struct pt_regs *regs, unsigned long entry, 
 79			 unsigned long stack);
 80
 81struct cpuinfo_um {
 82	unsigned long loops_per_jiffy;
 83	int ipi_pipe[2];
 84	int cache_alignment;
 85	union {
 86		__u32		x86_capability[NCAPINTS + NBUGINTS];
 87		unsigned long	x86_capability_alignment;
 88	};
 89};
 90
 91extern struct cpuinfo_um boot_cpu_data;
 92
 93#define cpu_data(cpu)    boot_cpu_data
 
 
 
 
 
 
 94#define current_cpu_data boot_cpu_data
 95#define cache_line_size()	(boot_cpu_data.cache_alignment)
 
 96
 97extern unsigned long get_thread_reg(int reg, jmp_buf *buf);
 98#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
 99extern unsigned long __get_wchan(struct task_struct *p);
100
101#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