KERNEL_VM_BASE
pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE,
KERNEL_VM_BASE + KERNEL_VM_SIZE);