/*
   * linux/arch/sh/kernel/sys_sh.c
   *
   * This file contains various random system calls that
   * have a non-standard calling sequence on the Linux/SuperH
   * platform.
   *
   * Taken from i386 version.
   */

  #include <linux/errno.h>
  #include <linux/sched.h>
  #include <linux/mm.h>
  #include <linux/smp.h>

  #include <linux/sem.h>
  #include <linux/msg.h>
  #include <linux/shm.h>
  #include <linux/stat.h>
  #include <linux/syscalls.h>
  #include <linux/mman.h>
  #include <linux/file.h>
  #include <linux/utsname.h>

  #include <linux/module.h>

  #include <linux/fs.h>

  #include <linux/ipc.h>

  #include <asm/syscalls.h>

  #include <asm/uaccess.h>

  #include <asm/unistd.h>

  #include <asm/cacheflush.h>
  #include <asm/cachectl.h>

  asmlinkage int old_mmap(unsigned long addr, unsigned long len,
  	unsigned long prot, unsigned long flags,
  	int fd, unsigned long off)
  {
  	if (off & ~PAGE_MASK)
  		return -EINVAL;

  	return sys_mmap_pgoff(addr, len, prot, flags, fd, off>>PAGE_SHIFT);

  }
  
  asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
  	unsigned long prot, unsigned long flags,
  	unsigned long fd, unsigned long pgoff)
  {

  	/*
  	 * The shift for mmap2 is constant, regardless of PAGE_SIZE
  	 * setting.
  	 */
  	if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1))
  		return -EINVAL;
  
  	pgoff >>= PAGE_SHIFT - 12;

  	return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);

  }

  /* sys_cacheflush -- flush (part of) the processor cache.  */
  asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op)
  {
  	struct vm_area_struct *vma;

  	if ((op <= 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))

  		return -EINVAL;
  
  	/*
  	 * Verify that the specified address region actually belongs
  	 * to this process.
  	 */
  	if (addr + len < addr)
  		return -EFAULT;
  
  	down_read(&current->mm->mmap_sem);
  	vma = find_vma (current->mm, addr);
  	if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) {
  		up_read(&current->mm->mmap_sem);
  		return -EFAULT;
  	}
  
  	switch (op & CACHEFLUSH_D_PURGE) {
  		case CACHEFLUSH_D_INVAL:
  			__flush_invalidate_region((void *)addr, len);
  			break;
  		case CACHEFLUSH_D_WB:
  			__flush_wback_region((void *)addr, len);
  			break;
  		case CACHEFLUSH_D_PURGE:
  			__flush_purge_region((void *)addr, len);
  			break;
  	}
  
  	if (op & CACHEFLUSH_I)

  		flush_icache_range(addr, addr+len);

  
  	up_read(&current->mm->mmap_sem);
  	return 0;
  }