Constant sunrise_kernel::paging::arch::i386::ENTRY_COUNT

pub const ENTRY_COUNT: usize = PAGE_SIZE / ::core::mem::size_of::<entry::I386Entry>(); // 1_024usize

The number of entries a page table has. On i386 a page table/directory is 1024 entries * 4 bytes per entry = 4kB, fits in 1 page.