/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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*/
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#ifndef __UM_PROCESSOR_GENERIC_H
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#define __UM_PROCESSOR_GENERIC_H
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struct pt_regs;
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struct task_struct;
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#include <asm/ptrace.h>
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#include <registers.h>
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#include <sysdep/archsetjmp.h>
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#include <linux/prefetch.h>
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struct mm_struct;
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struct thread_struct {
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struct pt_regs regs;
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struct pt_regs *segv_regs;
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int singlestep_syscall;
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void *fault_addr;
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jmp_buf *fault_catcher;
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struct task_struct *prev_sched;
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struct arch_thread arch;
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jmp_buf switch_buf;
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struct {
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int op;
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union {
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struct {
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int pid;
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} fork, exec;
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struct {
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int (*proc)(void *);
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void *arg;
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} thread;
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struct {
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void (*proc)(void *);
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void *arg;
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} cb;
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} u;
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} request;
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};
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#define INIT_THREAD \
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{ \
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.regs = EMPTY_REGS, \
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.fault_addr = NULL, \
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.prev_sched = NULL, \
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.arch = INIT_ARCH_THREAD, \
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.request = { 0 } \
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}
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static inline void release_thread(struct task_struct *task)
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{
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}
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static inline void mm_copy_segments(struct mm_struct *from_mm,
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struct mm_struct *new_mm)
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{
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}
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/*
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* User space process size: 3GB (default).
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*/
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extern unsigned long task_size;
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#define TASK_SIZE (task_size)
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#undef STACK_TOP
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#undef STACK_TOP_MAX
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extern unsigned long stacksizelim;
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#define STACK_ROOM (stacksizelim)
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#define STACK_TOP (TASK_SIZE - 2 * PAGE_SIZE)
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#define STACK_TOP_MAX STACK_TOP
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's.
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*/
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#define TASK_UNMAPPED_BASE (0x40000000)
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extern void start_thread(struct pt_regs *regs, unsigned long entry,
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unsigned long stack);
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struct cpuinfo_um {
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unsigned long loops_per_jiffy;
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int ipi_pipe[2];
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};
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extern struct cpuinfo_um boot_cpu_data;
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#define cpu_data (&boot_cpu_data)
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#define current_cpu_data boot_cpu_data
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#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
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extern unsigned long get_wchan(struct task_struct *p);
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#endif
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