1/* 2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.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 "choose-mode.h" 15#include "registers.h" 16#include "sysdep/archsetjmp.h" 17 18struct mm_struct; 19 20struct thread_struct { 21 /* This flag is set to 1 before calling do_fork (and analyzed in 22 * copy_thread) to mark that we are begin called from userspace (fork / 23 * vfork / clone), and reset to 0 after. It is left to 0 when called 24 * from kernelspace (i.e. kernel_thread() or fork_idle(), as of 2.6.11). */ 25 struct task_struct *saved_task; 26 int forking; 27 int nsyscalls; 28 struct pt_regs regs; 29 int singlestep_syscall; 30 void *fault_addr; 31 void *fault_catcher; 32 struct task_struct *prev_sched; 33 unsigned long temp_stack; 34 void *exec_buf; 35 struct arch_thread arch; 36 union { 37#ifdef CONFIG_MODE_TT 38 struct { 39 int extern_pid; 40 int tracing; 41 int switch_pipe[2]; 42 int vm_seq; 43 } tt; 44#endif 45#ifdef CONFIG_MODE_SKAS 46 struct { 47 jmp_buf switch_buf; 48 int mm_count; 49 } skas; 50#endif 51 } mode; 52 struct { 53 int op; 54 union { 55 struct { 56 int pid; 57 } fork, exec; 58 struct { 59 int (*proc)(void *); 60 void *arg; 61 } thread; 62 struct { 63 void (*proc)(void *); 64 void *arg; 65 } cb; 66 } u; 67 } request; 68}; 69 70#define INIT_THREAD \ 71{ \ 72 .forking = 0, \ 73 .nsyscalls = 0, \ 74 .regs = EMPTY_REGS, \ 75 .fault_addr = NULL, \ 76 .prev_sched = NULL, \ 77 .temp_stack = 0, \ 78 .exec_buf = NULL, \ 79 .arch = INIT_ARCH_THREAD, \ 80 .request = { 0 } \ 81} 82 83typedef struct { 84 unsigned long seg; 85} mm_segment_t; 86 87extern struct task_struct *alloc_task_struct(void); 88 89extern void release_thread(struct task_struct *); 90extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); 91 92static inline void prepare_to_copy(struct task_struct *tsk) 93{ 94} 95 96 97extern unsigned long thread_saved_pc(struct task_struct *t); 98 99static inline void mm_copy_segments(struct mm_struct *from_mm, 100 struct mm_struct *new_mm) 101{ 102} 103 104#define init_stack (init_thread_union.stack) 105 106/* 107 * User space process size: 3GB (default). 108 */ 109extern unsigned long task_size; 110 111#define TASK_SIZE (task_size) 112 113/* This decides where the kernel will search for a free chunk of vm 114 * space during mmap's. 115 */ 116#define TASK_UNMAPPED_BASE (0x40000000) 117 118extern void start_thread(struct pt_regs *regs, unsigned long entry, 119 unsigned long stack); 120 121struct cpuinfo_um { 122 unsigned long loops_per_jiffy; 123 int ipi_pipe[2]; 124}; 125 126extern struct cpuinfo_um boot_cpu_data; 127 128#define my_cpu_data cpu_data[smp_processor_id()] 129 130#ifdef CONFIG_SMP 131extern struct cpuinfo_um cpu_data[]; 132#define current_cpu_data cpu_data[smp_processor_id()] 133#else 134#define cpu_data (&boot_cpu_data) 135#define current_cpu_data boot_cpu_data 136#endif 137 138 139#ifdef CONFIG_MODE_SKAS 140#define KSTK_REG(tsk, reg) \ 141 get_thread_reg(reg, &tsk->thread.mode.skas.switch_buf) 142#else 143#define KSTK_REG(tsk, reg) (0xbadbabe) 144#endif 145#define get_wchan(p) (0) 146 147#endif 148