Jeremy Soller
125 lines
3.3 KiB
Rust
125 lines
3.3 KiB
Rust
use core::{mem, ptr};
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use super::sdt::Sdt;
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use super::{ACPI_TABLE, SDT_POINTERS, get_sdt, find_sdt, get_sdt_signature, load_table};
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use paging::ActivePageTable;
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#[repr(packed)]
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#[derive(Debug)]
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pub struct Fadt {
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pub header: Sdt,
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pub firmware_ctrl: u32,
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pub dsdt: u32,
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// field used in ACPI 1.0; no longer in use, for compatibility only
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reserved: u8,
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pub preferred_power_managament: u8,
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pub sci_interrupt: u16,
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pub smi_command_port: u32,
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pub acpi_enable: u8,
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pub acpi_disable: u8,
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pub s4_bios_req: u8,
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pub pstate_control: u8,
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pub pm1a_event_block: u32,
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pub pm1b_event_block: u32,
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pub pm1a_control_block: u32,
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pub pm1b_control_block: u32,
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pub pm2_control_block: u32,
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pub pm_timer_block: u32,
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pub gpe0_block: u32,
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pub gpe1_block: u32,
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pub pm1_event_length: u8,
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pub pm1_control_length: u8,
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pub pm2_control_length: u8,
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pub pm_timer_length: u8,
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pub gpe0_ength: u8,
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pub gpe1_length: u8,
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pub gpe1_base: u8,
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pub c_state_control: u8,
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pub worst_c2_latency: u16,
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pub worst_c3_latency: u16,
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pub flush_size: u16,
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pub flush_stride: u16,
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pub duty_offset: u8,
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pub duty_width: u8,
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pub day_alarm: u8,
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pub month_alarm: u8,
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pub century: u8,
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// reserved in ACPI 1.0; used since ACPI 2.0+
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pub boot_architecture_flags: u16,
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reserved2: u8,
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pub flags: u32,
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}
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/* ACPI 2 structure
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#[repr(packed)]
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#[derive(Clone, Copy, Debug, Default)]
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pub struct GenericAddressStructure {
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address_space: u8,
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bit_width: u8,
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bit_offset: u8,
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access_size: u8,
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address: u64,
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}
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{
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// 12 byte structure; see below for details
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pub reset_reg: GenericAddressStructure,
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pub reset_value: u8,
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reserved3: [u8; 3],
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// 64bit pointers - Available on ACPI 2.0+
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pub x_firmware_control: u64,
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pub x_dsdt: u64,
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pub x_pm1a_event_block: GenericAddressStructure,
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pub x_pm1b_event_block: GenericAddressStructure,
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pub x_pm1a_control_block: GenericAddressStructure,
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pub x_pm1b_control_block: GenericAddressStructure,
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pub x_pm2_control_block: GenericAddressStructure,
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pub x_pm_timer_block: GenericAddressStructure,
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pub x_gpe0_block: GenericAddressStructure,
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pub x_gpe1_block: GenericAddressStructure,
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}
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*/
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impl Fadt {
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pub fn new(sdt: &'static Sdt) -> Option<Fadt> {
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if &sdt.signature == b"FACP" && sdt.length as usize >= mem::size_of::<Fadt>() {
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Some(unsafe { ptr::read((sdt as *const Sdt) as *const Fadt) })
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} else {
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None
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}
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}
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pub fn init(active_table: &mut ActivePageTable) {
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let fadt_sdt = find_sdt("FACP");
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let fadt = if fadt_sdt.len() == 1 {
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load_table(get_sdt_signature(fadt_sdt[0]));
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Fadt::new(fadt_sdt[0])
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} else {
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println!("Unable to find FADT");
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return;
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};
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if let Some(fadt) = fadt {
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println!(" FACP: {:X}", fadt.dsdt);
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let dsdt_sdt = get_sdt(fadt.dsdt as usize, active_table);
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let signature = get_sdt_signature(dsdt_sdt);
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if let Some(ref mut ptrs) = *(SDT_POINTERS.write()) {
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ptrs.insert(signature, dsdt_sdt);
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}
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let mut fadt_t = ACPI_TABLE.fadt.write();
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*fadt_t = Some(fadt);
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}
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}
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}
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