#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <asm/i387.h>

static struct proc_dir_entry* pufdata_file;

static int pufdata_show(struct seq_file *m, void *v)
{
  int i, cnt;

  for_each_cpu(i, cpu_present_mask) {
     seq_printf(m, "CPU %i:\n", i);

     for (cnt = 0; cnt < 64; cnt += 4)
       seq_printf(m, "%08x %08x %08x %08x\n", 
               per_cpu(puf_data, i).xmm_space[cnt + 3],
               per_cpu(puf_data, i).xmm_space[cnt + 2],
               per_cpu(puf_data, i).xmm_space[cnt + 1],
               per_cpu(puf_data, i).xmm_space[cnt + 0]);
     
     seq_printf(m, "\n");
  }

  return 0;
}

static int pufdata_open(struct inode *inode, struct file *file)
{
  return single_open(file, pufdata_show, NULL);
}

static const struct file_operations pufdata_fops = {
  .owner  = THIS_MODULE,
  .open  = pufdata_open,
  .read = seq_read,
  .llseek  = seq_lseek,
  .release  = single_release,
};

static int __init pufdata_init(void)
{
  pufdata_file = proc_create("pufdata", 0, NULL, &pufdata_fops);

  if (!pufdata_file) {
    return -ENOMEM;
  }

  return 0;
}

static void __exit pufdata_exit(void)
{
  remove_proc_entry("pufdata", NULL);
}

module_init(pufdata_init);
module_exit(pufdata_exit);