include/asm-um/processor-generic.h

   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
   9 struct pt_regs;
  10
  11 struct task_struct;
  12
  13 #include "asm/ptrace.h"
  14 #include "registers.h"
  15 #include "sysdep/archsetjmp.h"
  16
  17 struct mm_struct;
  18
  19 struct 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         int nsyscalls;
  30         struct pt_regs regs;
  31         int singlestep_syscall;
  32         void *fault_addr;
  33         jmp_buf *fault_catcher;
  34         struct task_struct *prev_sched;
  35         unsigned long temp_stack;
  36         jmp_buf *exec_buf;
  37         struct arch_thread arch;
  38         jmp_buf switch_buf;
  39         int mm_count;
  40         struct {
  41                 int op;
  42                 union {
  43                         struct {
  44                                 int pid;
  45                         } fork, exec;
  46                         struct {
  47                                 int (*proc)(void *);
  48                                 void *arg;
  49                         } thread;
  50                         struct {
  51                                 void (*proc)(void *);
  52                                 void *arg;
  53                         } cb;
  54                 } u;
  55         } request;
  56 };
  57
  58 #define INIT_THREAD \
  59 { \
  60         .forking                = 0, \
  61         .nsyscalls              = 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
  71 typedef struct {
  72         unsigned long seg;
  73 } mm_segment_t;
  74
  75 extern struct task_struct *alloc_task_struct(void);
  76
  77 static inline void release_thread(struct task_struct *task)
  78 {
  79 }
  80
  81 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
  82
  83 static inline void prepare_to_copy(struct task_struct *tsk)
  84 {
  85 }
  86
  87
  88 extern unsigned long thread_saved_pc(struct task_struct *t);
  89
  90 static inline void mm_copy_segments(struct mm_struct *from_mm,
  91                                     struct mm_struct *new_mm)
  92 {
  93 }
  94
  95 #define init_stack      (init_thread_union.stack)
  96
  97 /*
  98  * User space process size: 3GB (default).
  99  */
 100 extern unsigned long task_size;
 101
 102 #define TASK_SIZE       (task_size)
 103
 104 /* This decides where the kernel will search for a free chunk of vm
 105  * space during mmap's.
 106  */
 107 #define TASK_UNMAPPED_BASE      (0x40000000)
 108
 109 extern void start_thread(struct pt_regs *regs, unsigned long entry,
 110                          unsigned long stack);
 111
 112 struct cpuinfo_um {
 113         unsigned long loops_per_jiffy;
 114         int ipi_pipe[2];
 115 };
 116
 117 extern struct cpuinfo_um boot_cpu_data;
 118
 119 #define my_cpu_data             cpu_data[smp_processor_id()]
 120
 121 #ifdef CONFIG_SMP
 122 extern struct cpuinfo_um cpu_data[];
 123 #define current_cpu_data cpu_data[smp_processor_id()]
 124 #else
 125 #define cpu_data (&boot_cpu_data)
 126 #define current_cpu_data boot_cpu_data
 127 #endif
 128
 129
 130 #define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
 131 #define get_wchan(p) (0)
 132
 133 #endif