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acpi_tables: Add support for Buffer objects

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These are necessary to populate "_MAT" entries for CPU devices.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2019-11-20 13:33:32 +00:00 committed by Sebastien Boeuf
parent 1da0ff395d
commit e51ebe045f
1 changed files with 51 additions and 0 deletions
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51
acpi_tables/src/aml.rs
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@ -1109,6 +1109,34 @@ impl<'a> Aml for MethodCall<'a> {
}
}
pub struct Buffer {
data: Vec<u8>,
}
impl Buffer {
pub fn new(data: Vec<u8>) -> Self {
Buffer { data }
}
}
impl Aml for Buffer {
fn to_aml_bytes(&self) -> Vec<u8> {
let mut bytes = Vec::new();
bytes.extend_from_slice(&self.data.len().to_aml_bytes());
bytes.extend_from_slice(&self.data);
let mut pkg_length = create_pkg_length(&bytes, true);
pkg_length.reverse();
for byte in pkg_length {
bytes.insert(0, byte);
}
bytes.insert(0, 0x11); /* BufferOp */
bytes
}
}
#[cfg(test)]
mod tests {
use super::*;
@ -1816,4 +1844,27 @@ mod tests {
);
assert_eq!(&methods[..], &test_data[..])
}
#[test]
fn test_buffer() {
/*
Name (_MAT, Buffer (0x08) // _MAT: Multiple APIC Table Entry
{
0x00, 0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00 /* ........ */
})
*/
let buffer_data = [
0x08, 0x5F, 0x4D, 0x41, 0x54, 0x11, 0x0B, 0x0A, 0x08, 0x00, 0x08, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00,
];
assert_eq!(
Name::new(
"_MAT".into(),
&Buffer::new(vec![0x00, 0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00])
)
.to_aml_bytes(),
&buffer_data[..]
)
}
}