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 task_struct *saved_task; 23 struct pt_regs regs; 24 int singlestep_syscall; 25 void *fault_addr; 26 jmp_buf *fault_catcher; 27 struct task_struct *prev_sched; 28 unsigned long temp_stack; 29 jmp_buf *exec_buf; 30 struct arch_thread arch; 31 jmp_buf switch_buf; 32 int mm_count; 33 struct { 34 int op; 35 union { 36 struct { 37 int pid; 38 } fork, exec; 39 struct { 40 int (*proc)(void *); 41 void *arg; 42 } thread; 43 struct { 44 void (*proc)(void *); 45 void *arg; 46 } cb; 47 } u; 48 } request; 49 }; 50 51 #define INIT_THREAD \ 52 { \ 53 .regs = EMPTY_REGS, \ 54 .fault_addr = NULL, \ 55 .prev_sched = NULL, \ 56 .temp_stack = 0, \ 57 .exec_buf = NULL, \ 58 .arch = INIT_ARCH_THREAD, \ 59 .request = { 0 } \ 60 } 61 62 static inline void release_thread(struct task_struct *task) 63 { 64 } 65 66 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); 67 68 extern unsigned long thread_saved_pc(struct task_struct *t); 69 70 static inline void mm_copy_segments(struct mm_struct *from_mm, 71 struct mm_struct *new_mm) 72 { 73 } 74 75 #define init_stack (init_thread_union.stack) 76 77 /* 78 * User space process size: 3GB (default). 79 */ 80 extern unsigned long task_size; 81 82 #define TASK_SIZE (task_size) 83 84 #undef STACK_TOP 85 #undef STACK_TOP_MAX 86 87 extern unsigned long stacksizelim; 88 89 #define STACK_ROOM (stacksizelim) 90 #define STACK_TOP (TASK_SIZE - 2 * PAGE_SIZE) 91 #define STACK_TOP_MAX STACK_TOP 92 93 /* This decides where the kernel will search for a free chunk of vm 94 * space during mmap's. 95 */ 96 #define TASK_UNMAPPED_BASE (0x40000000) 97 98 extern void start_thread(struct pt_regs *regs, unsigned long entry, 99 unsigned long stack); 100 101 struct cpuinfo_um { 102 unsigned long loops_per_jiffy; 103 int ipi_pipe[2]; 104 }; 105 106 extern struct cpuinfo_um boot_cpu_data; 107 108 #define my_cpu_data cpu_data[smp_processor_id()] 109 110 #ifdef CONFIG_SMP 111 extern struct cpuinfo_um cpu_data[]; 112 #define current_cpu_data cpu_data[smp_processor_id()] 113 #else 114 #define cpu_data (&boot_cpu_data) 115 #define current_cpu_data boot_cpu_data 116 #endif 117 118 119 #define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf) 120 extern unsigned long get_wchan(struct task_struct *p); 121 122 #endif 123