raw_acpi/
ecdt.rs

1use crate::{GenericAddressStructure, SDTHeader};
2use core::ffi::CStr;
3
4#[derive(Copy, Clone)]
5#[repr(C, packed)]
6/// ## Embedded Controller Boot Resources Table (ECDT)
7///
8/// This optional table provides the processor-relative, translated resources of an Embedded Controller.
9/// The presence of this table allows OSPM to provide Embedded Controller operation region space access before the namespace has been evaluated.
10/// If this table is not provided, the Embedded Controller region space will not be available
11/// until the Embedded Controller device in the AML namespace has been discovered and enumerated.
12/// The availability of the region space can be detected by providing a _REG method object underneath the Embedded Controller device.
13pub struct EmbeddedControllerBootResourcesTable {
14    /// - **Signature** - "ECDT"
15    pub header: SDTHeader,
16    /// Contains the processor relative address, represented in Generic Address Structure format, of the Embedded Controller Command/Status register.
17    ///
18    /// Note: Only System I/O space and System Memory space are valid for values for `address_space_id`.
19    pub ec_control: GenericAddressStructure,
20    /// Contains the processor-relative address, represented in Generic Address Structure format, of the Embedded Controller Data register.
21    ///
22    /// Note: Only System I/O space and System Memory space are valid for values for `address_space_id`.
23    pub ec_data: GenericAddressStructure,
24    /// Unique ID-Same as the value returned by the _UID under the device in the namespace that represents this embedded controller.
25    pub uid: u32,
26    /// The bit assignment of the SCI interrupt within the GPEx_STS register of a GPE block described in the FADT that the embedded controller triggers.
27    pub gpe_bit: u8,
28    /// ASCII, null terminated, string that contains a fully qualified reference to the namespace object that is this embedded controller device (for example, "\_SB.PCI0.ISA.EC").
29    /// Quotes are omitted in the data field.
30    pub ec_id: [u8; 0],
31}
32impl EmbeddedControllerBootResourcesTable {
33    pub const fn ec_id(&self) -> &CStr {
34        unsafe {
35            CStr::from_bytes_with_nul_unchecked(core::slice::from_raw_parts(
36                (self as *const _ as *const u8).add(0x41),
37                self.header.length as usize - 0x41,
38            ))
39        }
40    }
41}
raw_acpi/ecdt.rs

raw_acpi/
ecdt.rs
