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 "asm/pgtable.h"
15 #include "registers.h"
16 #include "sysdep/archsetjmp.h"
20 struct thread_struct {
21 struct task_struct *saved_task;
23 * This flag is set to 1 before calling do_fork (and analyzed in
24 * copy_thread) to mark that we are begin called from userspace (fork /
25 * vfork / clone), and reset to 0 after. It is left to 0 when called
26 * from kernelspace (i.e. kernel_thread() or fork_idle(),
31 int singlestep_syscall;
33 jmp_buf *fault_catcher;
34 struct task_struct *prev_sched;
35 unsigned long temp_stack;
37 struct arch_thread arch;
66 .arch = INIT_ARCH_THREAD, \
70 extern struct task_struct *alloc_task_struct(void);
72 static inline void release_thread(struct task_struct *task)
76 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
78 static inline void prepare_to_copy(struct task_struct *tsk)
83 extern unsigned long thread_saved_pc(struct task_struct *t);
85 static inline void mm_copy_segments(struct mm_struct *from_mm,
86 struct mm_struct *new_mm)
90 #define init_stack (init_thread_union.stack)
93 * User space process size: 3GB (default).
95 #define TASK_SIZE (CONFIG_TOP_ADDR & PGDIR_MASK)
97 /* This decides where the kernel will search for a free chunk of vm
98 * space during mmap's.
100 #define TASK_UNMAPPED_BASE (0x40000000)
102 extern void start_thread(struct pt_regs *regs, unsigned long entry,
103 unsigned long stack);
106 unsigned long loops_per_jiffy;
110 extern struct cpuinfo_um boot_cpu_data;
112 #define my_cpu_data cpu_data[smp_processor_id()]
115 extern struct cpuinfo_um cpu_data[];
116 #define current_cpu_data cpu_data[smp_processor_id()]
118 #define cpu_data (&boot_cpu_data)
119 #define current_cpu_data boot_cpu_data
123 #define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
124 extern unsigned long get_wchan(struct task_struct *p);