[PATCH] uml: remove unneeded file

/*

 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)

 * Copyright 2003 PathScale, Inc.

 * Licensed under the GPL

 */

#include "linux/config.h"

#include "linux/kernel.h"

#include "linux/sched.h"

#include "linux/interrupt.h"

#include "linux/string.h"

#include "linux/mm.h"

#include "linux/slab.h"

#include "linux/utsname.h"

#include "linux/fs.h"

#include "linux/utime.h"

#include "linux/smp_lock.h"

#include "linux/module.h"

#include "linux/init.h"

#include "linux/capability.h"

#include "linux/vmalloc.h"

#include "linux/spinlock.h"

#include "linux/proc_fs.h"

#include "linux/ptrace.h"

#include "linux/random.h"

#include "linux/personality.h"

#include "asm/unistd.h"

#include "asm/mman.h"

#include "asm/segment.h"

#include "asm/stat.h"

#include "asm/pgtable.h"

#include "asm/processor.h"

#include "asm/tlbflush.h"

#include "asm/uaccess.h"

#include "asm/user.h"

#include "user_util.h"

#include "kern_util.h"

#include "kern.h"

#include "signal_kern.h"

#include "init.h"

#include "irq_user.h"

#include "mem_user.h"

#include "tlb.h"

#include "frame_kern.h"

#include "sigcontext.h"

#include "os.h"

#include "mode.h"

#include "mode_kern.h"

#include "choose-mode.h"

/* This is a per-cpu array.  A processor only modifies its entry and it only

 * cares about its entry, so it's OK if another processor is modifying its

 * entry.

 */

struct cpu_task cpu_tasks[NR_CPUS] = { [0 ... NR_CPUS - 1] = { -1, NULL } };

int external_pid(void *t)

{

	struct task_struct *task = t ? t : current;

	return(CHOOSE_MODE_PROC(external_pid_tt, external_pid_skas, task));

}

int pid_to_processor_id(int pid)

{

	int i;

	for(i = 0; i < ncpus; i++){

		if(cpu_tasks[i].pid == pid) return(i);

	}

	return(-1);

}

void free_stack(unsigned long stack, int order)

{

	free_pages(stack, order);

}

unsigned long alloc_stack(int order, int atomic)

{

	unsigned long page;

	gfp_t flags = GFP_KERNEL;

	if (atomic)

		flags = GFP_ATOMIC;

	page = __get_free_pages(flags, order);

	if(page == 0)

		return(0);

	stack_protections(page);

	return(page);

}

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

{

	int pid;

	current->thread.request.u.thread.proc = fn;

	current->thread.request.u.thread.arg = arg;

	pid = do_fork(CLONE_VM | CLONE_UNTRACED | flags, 0,

		      &current->thread.regs, 0, NULL, NULL);

	if(pid < 0)

		panic("do_fork failed in kernel_thread, errno = %d", pid);

	return(pid);

}

void set_current(void *t)

{

	struct task_struct *task = t;

	cpu_tasks[task_thread_info(task)->cpu] = ((struct cpu_task)

		{ external_pid(task), task });

}

void *_switch_to(void *prev, void *next, void *last)

{

        struct task_struct *from = prev;

        struct task_struct *to= next;

        to->thread.prev_sched = from;

        set_current(to);

	do {

		current->thread.saved_task = NULL ;

		CHOOSE_MODE_PROC(switch_to_tt, switch_to_skas, prev, next);

		if(current->thread.saved_task)

			show_regs(&(current->thread.regs));

		next= current->thread.saved_task;

		prev= current;

	} while(current->thread.saved_task);

        return(current->thread.prev_sched);

}

void interrupt_end(void)

{

	if(need_resched()) schedule();

	if(test_tsk_thread_flag(current, TIF_SIGPENDING)) do_signal();

}

void release_thread(struct task_struct *task)

{

	CHOOSE_MODE(release_thread_tt(task), release_thread_skas(task));

}

void exit_thread(void)

{

	unprotect_stack((unsigned long) current_thread);

}

void *get_current(void)

{

	return(current);

}

int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,

		unsigned long stack_top, struct task_struct * p,

		struct pt_regs *regs)

{

	int ret;

	p->thread = (struct thread_struct) INIT_THREAD;

	ret = CHOOSE_MODE_PROC(copy_thread_tt, copy_thread_skas, nr,

				clone_flags, sp, stack_top, p, regs);

	if (ret || !current->thread.forking)

		goto out;

	clear_flushed_tls(p);

	/*

	 * Set a new TLS for the child thread?

	 */

	if (clone_flags & CLONE_SETTLS)

		ret = arch_copy_tls(p);

out:

	return ret;

}

void initial_thread_cb(void (*proc)(void *), void *arg)

{

	int save_kmalloc_ok = kmalloc_ok;

	kmalloc_ok = 0;

	CHOOSE_MODE_PROC(initial_thread_cb_tt, initial_thread_cb_skas, proc,

			 arg);

	kmalloc_ok = save_kmalloc_ok;

}

unsigned long stack_sp(unsigned long page)

{

	return(page + PAGE_SIZE - sizeof(void *));

}

int current_pid(void)

{

	return(current->pid);

}

void default_idle(void)

{

	CHOOSE_MODE(uml_idle_timer(), (void) 0);

	while(1){

		/* endless idle loop with no priority at all */

		/*

		 * although we are an idle CPU, we do not want to

		 * get into the scheduler unnecessarily.

		 */

		if(need_resched())

			schedule();

		idle_sleep(10);

	}

}

void cpu_idle(void)

{

	CHOOSE_MODE(init_idle_tt(), init_idle_skas());

}

int page_size(void)

{

	return(PAGE_SIZE);

}

void *um_virt_to_phys(struct task_struct *task, unsigned long addr,

		      pte_t *pte_out)

{

	pgd_t *pgd;

	pud_t *pud;

	pmd_t *pmd;

	pte_t *pte;

	pte_t ptent;

	if(task->mm == NULL)

		return(ERR_PTR(-EINVAL));

	pgd = pgd_offset(task->mm, addr);

	if(!pgd_present(*pgd))

		return(ERR_PTR(-EINVAL));

	pud = pud_offset(pgd, addr);

	if(!pud_present(*pud))

		return(ERR_PTR(-EINVAL));

	pmd = pmd_offset(pud, addr);

	if(!pmd_present(*pmd))

		return(ERR_PTR(-EINVAL));

	pte = pte_offset_kernel(pmd, addr);

	ptent = *pte;

	if(!pte_present(ptent))

		return(ERR_PTR(-EINVAL));

	if(pte_out != NULL)

		*pte_out = ptent;

	return((void *) (pte_val(ptent) & PAGE_MASK) + (addr & ~PAGE_MASK));

}

char *current_cmd(void)

{

#if defined(CONFIG_SMP) || defined(CONFIG_HIGHMEM)

	return("(Unknown)");

#else

	void *addr = um_virt_to_phys(current, current->mm->arg_start, NULL);

	return IS_ERR(addr) ? "(Unknown)": __va((unsigned long) addr);

#endif

}

void force_sigbus(void)

{

	printk(KERN_ERR "Killing pid %d because of a lack of memory\n",

	       current->pid);

	lock_kernel();

	sigaddset(&current->pending.signal, SIGBUS);

	recalc_sigpending();

	current->flags |= PF_SIGNALED;

	do_exit(SIGBUS | 0x80);

}

void dump_thread(struct pt_regs *regs, struct user *u)

{

}

void enable_hlt(void)

{

	panic("enable_hlt");

}

EXPORT_SYMBOL(enable_hlt);

void disable_hlt(void)

{

	panic("disable_hlt");

}

EXPORT_SYMBOL(disable_hlt);

void *um_kmalloc(int size)

{

	return kmalloc(size, GFP_KERNEL);

}

void *um_kmalloc_atomic(int size)

{

	return kmalloc(size, GFP_ATOMIC);

}

void *um_vmalloc(int size)

{

	return vmalloc(size);

}

void *um_vmalloc_atomic(int size)

{

	return __vmalloc(size, GFP_ATOMIC | __GFP_HIGHMEM, PAGE_KERNEL);

}

int __cant_sleep(void) {

	return in_atomic() || irqs_disabled() || in_interrupt();

	/* Is in_interrupt() really needed? */

}

unsigned long get_fault_addr(void)

{

	return((unsigned long) current->thread.fault_addr);

}

EXPORT_SYMBOL(get_fault_addr);

void not_implemented(void)

{

	printk(KERN_DEBUG "Something isn't implemented in here\n");

}

EXPORT_SYMBOL(not_implemented);

int user_context(unsigned long sp)

{

	unsigned long stack;

	stack = sp & (PAGE_MASK << CONFIG_KERNEL_STACK_ORDER);

	return(stack != (unsigned long) current_thread);

}

extern exitcall_t __uml_exitcall_begin, __uml_exitcall_end;

void do_uml_exitcalls(void)

{

	exitcall_t *call;

	call = &__uml_exitcall_end;

	while (--call >= &__uml_exitcall_begin)

		(*call)();

}

char *uml_strdup(char *string)

{

	return kstrdup(string, GFP_KERNEL);

}

int copy_to_user_proc(void __user *to, void *from, int size)

{

	return(copy_to_user(to, from, size));

}

int copy_from_user_proc(void *to, void __user *from, int size)

{

	return(copy_from_user(to, from, size));

}

int clear_user_proc(void __user *buf, int size)

{

	return(clear_user(buf, size));

}

int strlen_user_proc(char __user *str)

{

	return(strlen_user(str));

}

int smp_sigio_handler(void)

{

#ifdef CONFIG_SMP

	int cpu = current_thread->cpu;

	IPI_handler(cpu);

	if(cpu != 0)

		return(1);

#endif

	return(0);

}

int cpu(void)

{

	return(current_thread->cpu);

}

static atomic_t using_sysemu = ATOMIC_INIT(0);

int sysemu_supported;

void set_using_sysemu(int value)

{

	if (value > sysemu_supported)

		return;

	atomic_set(&using_sysemu, value);

}

int get_using_sysemu(void)

{

	return atomic_read(&using_sysemu);

}

static int proc_read_sysemu(char *buf, char **start, off_t offset, int size,int *eof, void *data)

{

	if (snprintf(buf, size, "%d\n", get_using_sysemu()) < size) /*No overflow*/

		*eof = 1;

	return strlen(buf);

}

static int proc_write_sysemu(struct file *file,const char __user *buf, unsigned long count,void *data)

{

	char tmp[2];

	if (copy_from_user(tmp, buf, 1))

		return -EFAULT;

	if (tmp[0] >= '0' && tmp[0] <= '2')

		set_using_sysemu(tmp[0] - '0');

	return count; /*We use the first char, but pretend to write everything*/

}

int __init make_proc_sysemu(void)

{

	struct proc_dir_entry *ent;

	if (!sysemu_supported)

		return 0;

	ent = create_proc_entry("sysemu", 0600, &proc_root);

	if (ent == NULL)

	{

		printk(KERN_WARNING "Failed to register /proc/sysemu\n");

		return(0);

	}

	ent->read_proc  = proc_read_sysemu;

	ent->write_proc = proc_write_sysemu;

	return 0;

}

late_initcall(make_proc_sysemu);

int singlestepping(void * t)

{

	struct task_struct *task = t ? t : current;

	if ( ! (task->ptrace & PT_DTRACE) )

		return(0);

	if (task->thread.singlestep_syscall)

		return(1);

	return 2;

}

/*

 * Only x86 and x86_64 have an arch_align_stack().

 * All other arches have "#define arch_align_stack(x) (x)"

 * in their asm/system.h

 * As this is included in UML from asm-um/system-generic.h,

 * we can use it to behave as the subarch does.

 */

#ifndef arch_align_stack

unsigned long arch_align_stack(unsigned long sp)

{

	if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)

		sp -= get_random_int() % 8192;

	return sp & ~0xf;

}

#endif