include/asm-um/processor-generic.h

   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
   9 struct pt_regs;
  10
  11 struct task_struct;
  12
  13 #include "linux/config.h"
  14 #include "asm/ptrace.h"
  15 #include "choose-mode.h"
  16
  17 struct mm_struct;
  18
  19 struct thread_struct {
  20         int forking;
  21         int nsyscalls;
  22         struct pt_regs regs;
  23         unsigned long cr2;
  24         int err;
  25         unsigned long trap_no;
  26         int singlestep_syscall;
  27         void *fault_addr;
  28         void *fault_catcher;
  29         struct task_struct *prev_sched;
  30         unsigned long temp_stack;
  31         void *exec_buf;
  32         struct arch_thread arch;
  33         union {
  34 #ifdef CONFIG_MODE_TT
  35                 struct {
  36                         int extern_pid;
  37                         int tracing;
  38                         int switch_pipe[2];
  39                         int vm_seq;
  40                 } tt;
  41 #endif
  42 #ifdef CONFIG_MODE_SKAS
  43                 struct {
  44                         void *switch_buf;
  45                         void *fork_buf;
  46                         int mm_count;
  47                 } skas;
  48 #endif
  49         } mode;
  50         struct {
  51                 int op;
  52                 union {
  53                         struct {
  54                                 int pid;
  55                         } fork, exec;
  56                         struct {
  57                                 int (*proc)(void *);
  58                                 void *arg;
  59                         } thread;
  60                         struct {
  61                                 void (*proc)(void *);
  62                                 void *arg;
  63                         } cb;
  64                 } u;
  65         } request;
  66 };
  67
  68 #define INIT_THREAD \
  69 { \
  70         .forking                = 0, \
  71         .nsyscalls              = 0, \
  72         .regs                   = EMPTY_REGS, \
  73         .cr2                    = 0, \
  74         .err                    = 0, \
  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
  83 typedef struct {
  84         unsigned long seg;
  85 } mm_segment_t;
  86
  87 extern struct task_struct *alloc_task_struct(void);
  88
  89 extern void release_thread(struct task_struct *);
  90 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
  91 extern void dump_thread(struct pt_regs *regs, struct user *u);
  92 extern void prepare_to_copy(struct task_struct *tsk);
  93
  94 extern unsigned long thread_saved_pc(struct task_struct *t);
  95
  96 static inline void mm_copy_segments(struct mm_struct *from_mm,
  97                                     struct mm_struct *new_mm)
  98 {
  99 }
 100
 101 #define init_stack      (init_thread_union.stack)
 102
 103 /*
 104  * User space process size: 3GB (default).
 105  */
 106 extern unsigned long task_size;
 107
 108 #define TASK_SIZE       (task_size)
 109
 110 /* This decides where the kernel will search for a free chunk of vm
 111  * space during mmap's.
 112  */
 113 #define TASK_UNMAPPED_BASE      (0x40000000)
 114
 115 extern void start_thread(struct pt_regs *regs, unsigned long entry,
 116                          unsigned long stack);
 117
 118 struct cpuinfo_um {
 119         unsigned long loops_per_jiffy;
 120         int ipi_pipe[2];
 121 };
 122
 123 extern struct cpuinfo_um boot_cpu_data;
 124
 125 #define my_cpu_data             cpu_data[smp_processor_id()]
 126
 127 #ifdef CONFIG_SMP
 128 extern struct cpuinfo_um cpu_data[];
 129 #define current_cpu_data cpu_data[smp_processor_id()]
 130 #else
 131 #define cpu_data (&boot_cpu_data)
 132 #define current_cpu_data boot_cpu_data
 133 #endif
 134
 135 #define KSTK_EIP(tsk) (PT_REGS_IP(&tsk->thread.regs))
 136 #define KSTK_ESP(tsk) (PT_REGS_SP(&tsk->thread.regs))
 137 #define get_wchan(p) (0)
 138
 139 #endif
 140
 141 /*
 142  * Overrides for Emacs so that we follow Linus's tabbing style.
 143  * Emacs will notice this stuff at the end of the file and automatically
 144  * adjust the settings for this buffer only.  This must remain at the end
 145  * of the file.
 146  * ---------------------------------------------------------------------------
 147  * Local variables:
 148  * c-file-style: "linux"
 149  * End:
 150  */