2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
6 #ifndef __UM_PROCESSOR_GENERIC_H
7 #define __UM_PROCESSOR_GENERIC_H
13 #include "asm/ptrace.h"
14 #include "registers.h"
15 #include "sysdep/archsetjmp.h"
17 #include <linux/prefetch.h>
21 struct thread_struct {
22 struct task_struct *saved_task;
24 * This flag is set to 1 before calling do_fork (and analyzed in
25 * copy_thread) to mark that we are begin called from userspace (fork /
26 * vfork / clone), and reset to 0 after. It is left to 0 when called
27 * from kernelspace (i.e. kernel_thread() or fork_idle(),
32 int singlestep_syscall;
34 jmp_buf *fault_catcher;
35 struct task_struct *prev_sched;
36 unsigned long temp_stack;
38 struct arch_thread arch;
67 .arch = INIT_ARCH_THREAD, \
71 static inline void release_thread(struct task_struct *task)
75 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
77 extern unsigned long thread_saved_pc(struct task_struct *t);
79 static inline void mm_copy_segments(struct mm_struct *from_mm,
80 struct mm_struct *new_mm)
84 #define init_stack (init_thread_union.stack)
87 * User space process size: 3GB (default).
89 extern unsigned long task_size;
91 #define TASK_SIZE (task_size)
96 extern unsigned long stacksizelim;
98 #define STACK_ROOM (stacksizelim)
99 #define STACK_TOP (TASK_SIZE - 2 * PAGE_SIZE)
100 #define STACK_TOP_MAX STACK_TOP
102 /* This decides where the kernel will search for a free chunk of vm
103 * space during mmap's.
105 #define TASK_UNMAPPED_BASE (0x40000000)
107 extern void start_thread(struct pt_regs *regs, unsigned long entry,
108 unsigned long stack);
111 unsigned long loops_per_jiffy;
115 extern struct cpuinfo_um boot_cpu_data;
117 #define my_cpu_data cpu_data[smp_processor_id()]
120 extern struct cpuinfo_um cpu_data[];
121 #define current_cpu_data cpu_data[smp_processor_id()]
123 #define cpu_data (&boot_cpu_data)
124 #define current_cpu_data boot_cpu_data
128 #define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
129 extern unsigned long get_wchan(struct task_struct *p);