processor-generic.h

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/* 
 * 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>

#include <linux/prefetch.h>

struct mm_struct;

struct thread_struct {
    struct task_struct *saved_task;
    struct pt_regs regs;
    int singlestep_syscall;
    void *fault_addr;
    jmp_buf *fault_catcher;
    struct task_struct *prev_sched;
    unsigned long temp_stack;
    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 \
{ \
    .regs           = EMPTY_REGS,   \
    .fault_addr     = NULL, \
    .prev_sched     = NULL, \
    .temp_stack     = 0, \
    .arch           = INIT_ARCH_THREAD, \
    .request        = { 0 } \
}

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

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