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 my_cpu_data cpu_data[smp_processor_id()] 102 103 #ifdef CONFIG_SMP 104 extern struct cpuinfo_um cpu_data[]; 105 #define current_cpu_data cpu_data[smp_processor_id()] 106 #else 107 #define cpu_data (&boot_cpu_data) 108 #define current_cpu_data boot_cpu_data 109 #endif 110 111 112 #define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf) 113 extern unsigned long get_wchan(struct task_struct *p); 114 115 #endif 116