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// Copyright 2023 the authors.
// This project is dual-licensed under Apache 2.0 and MIT terms.
// See LICENSE-APACHE and LICENSE-MIT for details.
//! Error codes for standard Arm Architecture SMCCC calls.
pub use crate::error::SUCCESS;
use core::fmt::{self, Display, Formatter};
pub const NOT_SUPPORTED: i32 = -1;
pub const NOT_REQUIRED: i32 = -2;
pub const INVALID_PARAMETER: i32 = -3;
/// Errors for standard Arm Architecture calls.
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub enum Error {
/// The call is not supported by the implementation.
NotSupported,
/// The call is deemed not required by the implementation.
NotRequired,
/// One of the call parameters has a non-supported value.
InvalidParameter,
/// There was an unexpected return value.
Unknown(i32),
}
impl From<Error> for i32 {
fn from(error: Error) -> i32 {
match error {
Error::NotSupported => NOT_SUPPORTED,
Error::NotRequired => NOT_REQUIRED,
Error::InvalidParameter => INVALID_PARAMETER,
Error::Unknown(value) => value,
}
}
}
impl From<i32> for Error {
fn from(value: i32) -> Self {
match value {
NOT_SUPPORTED => Error::NotSupported,
NOT_REQUIRED => Error::NotRequired,
INVALID_PARAMETER => Error::InvalidParameter,
_ => Error::Unknown(value),
}
}
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
match self {
Self::NotSupported => write!(f, "SMCCC call not supported"),
Self::NotRequired => write!(f, "SMCCC call not required"),
Self::InvalidParameter => write!(f, "SMCCC call received non-supported value"),
Self::Unknown(e) => write!(f, "Unknown SMCCC return value {} ({0:#x})", e),
}
}
}
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