Speedy_Lex
35 lines
803 B
Rust
35 lines
803 B
Rust
use rmm::PhysicalAddress;
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/// RSDP
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#[derive(Copy, Clone, Debug)]
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#[repr(C, packed)]
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pub struct Rsdp {
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signature: [u8; 8],
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_checksum: u8,
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_oemid: [u8; 6],
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revision: u8,
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rsdt_address: u32,
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_length: u32,
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xsdt_address: u64,
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_extended_checksum: u8,
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_reserved: [u8; 3],
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}
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impl Rsdp {
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pub unsafe fn get_rsdp(already_supplied_rsdp: Option<*const u8>) -> Option<Rsdp> {
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already_supplied_rsdp.map(|rsdp_ptr| {
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// TODO: Validate
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unsafe { *(rsdp_ptr as *const Rsdp) }
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})
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}
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/// Get the RSDT or XSDT address
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pub fn sdt_address(&self) -> PhysicalAddress {
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PhysicalAddress::new(if self.revision >= 2 {
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self.xsdt_address as usize
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} else {
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self.rsdt_address as usize
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})
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}
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}
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