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