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 17struct mm_struct; 18 19struct thread_struct { 20 struct task_struct *saved_task; 21 /* 22 * This flag is set to 1 before calling do_fork (and analyzed in 23 * copy_thread) to mark that we are begin called from userspace (fork / 24 * vfork / clone), and reset to 0 after. It is left to 0 when called 25 * from kernelspace (i.e. kernel_thread() or fork_idle(), 26 * as of 2.6.11). 27 */ 28 int forking; 29 struct pt_regs regs; 30 int singlestep_syscall; 31 void *fault_addr; 32 jmp_buf *fault_catcher; 33 struct task_struct *prev_sched; 34 unsigned long temp_stack; 35 jmp_buf *exec_buf; 36 struct arch_thread arch; 37 jmp_buf switch_buf; 38 int mm_count; 39 struct { 40 int op; 41 union { 42 struct { 43 int pid; 44 } fork, exec; 45 struct { 46 int (*proc)(void *); 47 void *arg; 48 } thread; 49 struct { 50 void (*proc)(void *); 51 void *arg; 52 } cb; 53 } u; 54 } request; 55}; 56 57#define INIT_THREAD \ 58{ \ 59 .forking = 0, \ 60 .regs = EMPTY_REGS, \ 61 .fault_addr = NULL, \ 62 .prev_sched = NULL, \ 63 .temp_stack = 0, \ 64 .exec_buf = NULL, \ 65 .arch = INIT_ARCH_THREAD, \ 66 .request = { 0 } \ 67} 68 69extern struct task_struct *alloc_task_struct(void); 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 77static inline void prepare_to_copy(struct task_struct *tsk) 78{ 79} 80 81 82extern unsigned long thread_saved_pc(struct task_struct *t); 83 84static inline void mm_copy_segments(struct mm_struct *from_mm, 85 struct mm_struct *new_mm) 86{ 87} 88 89#define init_stack (init_thread_union.stack) 90 91/* 92 * User space process size: 3GB (default). 93 */ 94extern unsigned long task_size; 95 96#define TASK_SIZE (task_size) 97 98#undef STACK_TOP 99#undef STACK_TOP_MAX 100 101extern unsigned long stacksizelim; 102 103#define STACK_ROOM (stacksizelim) 104#define STACK_TOP (TASK_SIZE - 2 * PAGE_SIZE) 105#define STACK_TOP_MAX STACK_TOP 106 107/* This decides where the kernel will search for a free chunk of vm 108 * space during mmap's. 109 */ 110#define TASK_UNMAPPED_BASE (0x40000000) 111 112extern void start_thread(struct pt_regs *regs, unsigned long entry, 113 unsigned long stack); 114 115struct cpuinfo_um { 116 unsigned long loops_per_jiffy; 117 int ipi_pipe[2]; 118}; 119 120extern struct cpuinfo_um boot_cpu_data; 121 122#define my_cpu_data cpu_data[smp_processor_id()] 123 124#ifdef CONFIG_SMP 125extern struct cpuinfo_um cpu_data[]; 126#define current_cpu_data cpu_data[smp_processor_id()] 127#else 128#define cpu_data (&boot_cpu_data) 129#define current_cpu_data boot_cpu_data 130#endif 131 132 133#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf) 134extern unsigned long get_wchan(struct task_struct *p); 135 136#endif 137