Struct IdentityMapBuilder 

pub struct IdentityMapBuilder<'a> { /* private fields */ }

An IdentityMap Builder, which builds either a 4GB or 8GB identity map of the lower address space FUTURE: This logic can merged with the PageTableBuilder, rather than maintaining two implementations

Implementations

impl<'a> IdentityMapBuilder<'a>

pub fn new( page_table_gpa: u64, identity_map_size: IdentityMapSize, page_table: &'a mut [PageTable], flattened_page_table: &'a mut [u8], ) -> Result<Self, Error>

Creates a new instance of the IdentityMapBuilder. The PageTable slice is working memory for constructing the page table, and the u8 slice is the memory used to output the final bytes of the page table

The working memory and output memory are taken as parameters to allow for the caller to flexibly choose their allocation strategy, to support usage in no_std environments like openhcl_boot

pub fn with_address_bias(self, address_bias: u64) -> Self

Builds the page tables with an address bias, a fixed offset between the virtual and physical addresses in the identity map

pub fn with_pml4e_link(self, pml4e_link: (u64, u64)) -> Self

An optional PML4E entry may be linked, with arguments being (link_target_gpa, linkage_gpa). link_target_gpa represents the GPA of the PML4E to link into the built page table. linkage_gpa represents the GPA at which the linked PML4E should be linked.

pub fn build(self) -> &'a [u8]

Build a set of X64 page tables identity mapping the bottom address space with an optional address bias.