root/include/asm-um/processor-generic.h

INCLUDED FROM

DEFINITIONS

1. release_thread
2. prepare_to_copy
3. mm_copy_segments

/* 
 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 * Licensed under the GPL
 */

#ifndef __UM_PROCESSOR_GENERIC_H
#define __UM_PROCESSOR_GENERIC_H

struct pt_regs;

struct task_struct;

#include "asm/ptrace.h"
#include "registers.h"
#include "sysdep/archsetjmp.h"

struct mm_struct;

struct thread_struct {
        struct task_struct *saved_task;
        /*
         * This flag is set to 1 before calling do_fork (and analyzed in
         * copy_thread) to mark that we are begin called from userspace (fork /
         * vfork / clone), and reset to 0 after. It is left to 0 when called
         * from kernelspace (i.e. kernel_thread() or fork_idle(),
         * as of 2.6.11).
         */
        int forking;
        struct pt_regs regs;
        int singlestep_syscall;
        void *fault_addr;
        jmp_buf *fault_catcher;
        struct task_struct *prev_sched;
        unsigned long temp_stack;
        jmp_buf *exec_buf;
        struct arch_thread arch;
        jmp_buf switch_buf;
        int mm_count;
        struct {
                int op;
                union {
                        struct {
                                int pid;
                        } fork, exec;
                        struct {
                                int (*proc)(void *);
                                void *arg;
                        } thread;
                        struct {
                                void (*proc)(void *);
                                void *arg;
                        } cb;
                } u;
        } request;
};

#define INIT_THREAD \
{ \
        .forking                = 0, \
        .regs                   = EMPTY_REGS,   \
        .fault_addr             = NULL, \
        .prev_sched             = NULL, \
        .temp_stack             = 0, \
        .exec_buf               = NULL, \
        .arch                   = INIT_ARCH_THREAD, \
        .request                = { 0 } \
}

extern struct task_struct *alloc_task_struct(void);

static inline void release_thread(struct task_struct *task)
{
}

extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);

static inline void prepare_to_copy(struct task_struct *tsk)
{
}


extern unsigned long thread_saved_pc(struct task_struct *t);

static inline void mm_copy_segments(struct mm_struct *from_mm,
                                    struct mm_struct *new_mm)
{
}

#define init_stack      (init_thread_union.stack)

/*
 * User space process size: 3GB (default).
 */
extern unsigned long task_size;

#define TASK_SIZE (task_size)

#undef STACK_TOP
#undef STACK_TOP_MAX

extern unsigned long stacksizelim;

#define STACK_ROOM      (stacksizelim)
#define STACK_TOP       (TASK_SIZE - 2 * PAGE_SIZE)
#define STACK_TOP_MAX   STACK_TOP

/* This decides where the kernel will search for a free chunk of vm
 * space during mmap's.
 */
#define TASK_UNMAPPED_BASE      (0x40000000)

extern void start_thread(struct pt_regs *regs, unsigned long entry, 
                         unsigned long stack);

struct cpuinfo_um {
        unsigned long loops_per_jiffy;
        int ipi_pipe[2];
};

extern struct cpuinfo_um boot_cpu_data;

#define my_cpu_data             cpu_data[smp_processor_id()]

#ifdef CONFIG_SMP
extern struct cpuinfo_um cpu_data[];
#define current_cpu_data cpu_data[smp_processor_id()]
#else
#define cpu_data (&boot_cpu_data)
#define current_cpu_data boot_cpu_data
#endif


#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
extern unsigned long get_wchan(struct task_struct *p);

#endif