//! Paging constants pub const PTE_PRESENT: u64 = 1 << 0; pub const PTE_WRITABLE: u64 = 1 << 1; pub const PTE_USER: u64 = 1 << 2; pub const PTE_MASK: u64 = 0x000FFFFFFFFFF000; pub const OFFSET_MASK: u64 = 0xFFF; pub const PML4_ENTRIES: usize = 512; pub const KERNEL_PML4_START: usize = 256;