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acpi_tables: aml: Add support for named definitions

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Named definitions use op code 0x08 and are used to name some more
complex object.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2019-10-16 17:42:31 +01:00
parent 5a7076442c
commit bf0d0d9f9b
1 changed files with 45 additions and 8 deletions
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53
acpi_tables/src/aml.rs
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@ -62,9 +62,9 @@ impl From<&str> for Path {
}
}
pub type AmlByte = u8;
pub type Byte = u8;
impl Aml for AmlByte {
impl Aml for Byte {
fn to_bytes(&self) -> Vec<u8> {
let mut bytes = Vec::new();
bytes.push(0x0a); /* BytePrefix */
@ -73,9 +73,9 @@ impl Aml for AmlByte {
}
}
pub type AmlWord = u16;
pub type Word = u16;
impl Aml for AmlWord {
impl Aml for Word {
fn to_bytes(&self) -> Vec<u8> {
let mut bytes = Vec::new();
bytes.push(0x0bu8); /* WordPrefix */
@ -84,9 +84,9 @@ impl Aml for AmlWord {
}
}
pub type AmlDWord = u32;
pub type DWord = u32;
impl Aml for AmlDWord {
impl Aml for DWord {
fn to_bytes(&self) -> Vec<u8> {
let mut bytes = Vec::new();
bytes.push(0x0c); /* DWordPrefix */
@ -95,9 +95,9 @@ impl Aml for AmlDWord {
}
}
pub type AmlQWord = u64;
pub type QWord = u64;
impl Aml for AmlQWord {
impl Aml for QWord {
fn to_bytes(&self) -> Vec<u8> {
let mut bytes = Vec::new();
bytes.push(0x0e); /* QWordPrefix */
@ -106,6 +106,26 @@ impl Aml for AmlQWord {
}
}
pub struct Name {
bytes: Vec<u8>,
}
impl Aml for Name {
fn to_bytes(&self) -> Vec<u8> {
self.bytes.clone()
}
}
impl Name {
pub fn new(path: Path, inner: &dyn Aml) -> Self {
let mut bytes = Vec::new();
bytes.push(0x08); /* NameOp */
bytes.append(&mut path.to_bytes());
bytes.append(&mut inner.to_bytes());
Name { bytes }
}
}
#[cfg(test)]
mod tests {
use super::*;
@ -140,4 +160,21 @@ mod tests {
[0x0e, 0xad, 0xfb, 0xca, 0xde, 0xad, 0xfb, 0xca, 0xde]
);
}
#[test]
fn test_name() {
assert_eq!(
Name::new("_SB_.PCI0._UID".into(), &0x1234u16).to_bytes(),
[
0x08, /* NameOp */
0x2F, /* MultiNamePrefix */
0x03, /* 3 name parts */
0x5F, 0x53, 0x42, 0x5F, /* _SB_ */
0x50, 0x43, 0x49, 0x30, /* PCI0 */
0x5F, 0x55, 0x49, 0x44, /* _UID */
0x0b, /* WordPrefix */
0x34, 0x12
]
);
}
}