vmap_page_range

/*
 * vmap_page_range - map a range of page at aligned address
 */
int vmap_page_range(struct pcb_t *caller,           // process call
                    int addr,                       // start address which is aligned to pagesz
                    int pgnum,                      // num of mapping page
                    struct framephy_struct *frames, // list of the mapped frames
                    struct vm_rg_struct *ret_rg)    // return mapped region, the real mapped fp
{                                                   // no guarantee all given pages are mapped
  // uint32_t * pte = malloc(sizeof(uint32_t));
  // int  fpn;
  int pgit = 0;
  int pgn = PAGING_PGN(addr);

  ret_rg->rg_end = ret_rg->rg_start = addr; // at least the very first space is usable

  struct framephy_struct* traverse = frames;
  struct mm_struct *mm = caller->mm;
  //printf("Traverse fpn: %d\n", traverse->fpn);
  while(traverse!= NULL)
  {
    //printf("Traverse fpn: %d\n", traverse->fpn);
    /* TODO map range of frame to address space
     *      [addr to addr + pgnum*PAGING_PAGESZ
     *      in page table caller->mm->pgd[]
     */
    
    
    
    uint32_t pte;
    pte_set_fpn(&pte, traverse->fpn);
    //printf("traverse->fpn: %d\n", traverse->fpn);
    

    mm->pgd[pgn + pgit] = pte;
                  
    /* Tracking for later page replacement activities (if needed)
     * Enqueue new usage page */
    enlist_pgn_node(&caller->mm->fifo_pgn, pgn + pgit);

    /* Update return region */
    ret_rg->rg_end += PAGING_PAGESZ;
    pgit++;
    traverse=traverse->fp_next;
  }

  return 0;
}