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/* 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