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Linux/arch/um/include/asm/processor-generic.h

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  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 #include <linux/prefetch.h>
 18 
 19 struct mm_struct;
 20 
 21 struct thread_struct {
 22         struct pt_regs regs;
 23         struct pt_regs *segv_regs;
 24         int singlestep_syscall;
 25         void *fault_addr;
 26         jmp_buf *fault_catcher;
 27         struct task_struct *prev_sched;
 28         struct arch_thread arch;
 29         jmp_buf switch_buf;
 30         struct {
 31                 int op;
 32                 union {
 33                         struct {
 34                                 int pid;
 35                         } fork, exec;
 36                         struct {
 37                                 int (*proc)(void *);
 38                                 void *arg;
 39                         } thread;
 40                         struct {
 41                                 void (*proc)(void *);
 42                                 void *arg;
 43                         } cb;
 44                 } u;
 45         } request;
 46 };
 47 
 48 #define INIT_THREAD \
 49 { \
 50         .regs                   = EMPTY_REGS,   \
 51         .fault_addr             = NULL, \
 52         .prev_sched             = NULL, \
 53         .arch                   = INIT_ARCH_THREAD, \
 54         .request                = { 0 } \
 55 }
 56 
 57 static inline void release_thread(struct task_struct *task)
 58 {
 59 }
 60 
 61 extern unsigned long thread_saved_pc(struct task_struct *t);
 62 
 63 static inline void mm_copy_segments(struct mm_struct *from_mm,
 64                                     struct mm_struct *new_mm)
 65 {
 66 }
 67 
 68 #define init_stack      (init_thread_union.stack)
 69 
 70 /*
 71  * User space process size: 3GB (default).
 72  */
 73 extern unsigned long task_size;
 74 
 75 #define TASK_SIZE (task_size)
 76 
 77 #undef STACK_TOP
 78 #undef STACK_TOP_MAX
 79 
 80 extern unsigned long stacksizelim;
 81 
 82 #define STACK_ROOM      (stacksizelim)
 83 #define STACK_TOP       (TASK_SIZE - 2 * PAGE_SIZE)
 84 #define STACK_TOP_MAX   STACK_TOP
 85 
 86 /* This decides where the kernel will search for a free chunk of vm
 87  * space during mmap's.
 88  */
 89 #define TASK_UNMAPPED_BASE      (0x40000000)
 90 
 91 extern void start_thread(struct pt_regs *regs, unsigned long entry, 
 92                          unsigned long stack);
 93 
 94 struct cpuinfo_um {
 95         unsigned long loops_per_jiffy;
 96         int ipi_pipe[2];
 97 };
 98 
 99 extern struct cpuinfo_um boot_cpu_data;
100 
101 #define cpu_data (&boot_cpu_data)
102 #define current_cpu_data boot_cpu_data
103 
104 #define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
105 extern unsigned long get_wchan(struct task_struct *p);
106 
107 #endif
108 

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