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// Copyright 2022 the authors.
// This project is dual-licensed under Apache 2.0 and MIT terms.
// See LICENSE-APACHE and LICENSE-MIT for details.
//! PSCI error codes.
pub use crate::error::SUCCESS;
use core::fmt::{self, Display, Formatter};
pub const NOT_SUPPORTED: i32 = -1;
pub const INVALID_PARAMETERS: i32 = -2;
pub const DENIED: i32 = -3;
pub const ALREADY_ON: i32 = -4;
pub const ON_PENDING: i32 = -5;
pub const INTERNAL_FAILURE: i32 = -6;
pub const NOT_PRESENT: i32 = -7;
pub const DISABLED: i32 = -8;
pub const INVALID_ADDRESS: i32 = -9;
/// Standard PSCI errors.
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub enum Error {
/// PSCI call not supported.
NotSupported,
/// Invalid parameters to PSCI call.
InvalidParameters,
/// PSCI call denied.
Denied,
/// Core already on.
AlreadyOn,
/// Core already being turned on.
OnPending,
/// Internal failure in PSCI call.
InternalFailure,
/// Trusted OS not present on target core.
NotPresent,
/// Core disabled.
Disabled,
/// Invalid address passed to PSCI call.
InvalidAddress,
/// An unexpected return value from a PSCI function.
Unknown(i64),
}
impl From<Error> for i64 {
fn from(error: Error) -> i64 {
match error {
Error::NotSupported => NOT_SUPPORTED.into(),
Error::InvalidParameters => INVALID_PARAMETERS.into(),
Error::Denied => DENIED.into(),
Error::AlreadyOn => ALREADY_ON.into(),
Error::OnPending => ON_PENDING.into(),
Error::InternalFailure => INTERNAL_FAILURE.into(),
Error::NotPresent => NOT_PRESENT.into(),
Error::Disabled => DISABLED.into(),
Error::InvalidAddress => INVALID_ADDRESS.into(),
Error::Unknown(value) => value,
}
}
}
impl From<i32> for Error {
fn from(value: i32) -> Self {
match value {
NOT_SUPPORTED => Error::NotSupported,
INVALID_PARAMETERS => Error::InvalidParameters,
DENIED => Error::Denied,
ALREADY_ON => Error::AlreadyOn,
ON_PENDING => Error::OnPending,
INTERNAL_FAILURE => Error::InternalFailure,
NOT_PRESENT => Error::NotPresent,
DISABLED => Error::Disabled,
INVALID_ADDRESS => Error::InvalidAddress,
_ => Error::Unknown(value.into()),
}
}
}
impl From<i64> for Error {
fn from(value: i64) -> Self {
if let Ok(value) = i32::try_from(value) {
value.into()
} else {
Error::Unknown(value)
}
}
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
match self {
Self::NotSupported => write!(f, "PSCI call not supported"),
Self::InvalidParameters => write!(f, "Invalid parameters to PSCI call"),
Self::Denied => write!(f, "PSCI call denied"),
Self::AlreadyOn => write!(f, "Core already on"),
Self::OnPending => write!(f, "Core already being turned on"),
Self::InternalFailure => write!(f, "Internal failure in PSCI call"),
Self::NotPresent => write!(f, "Trusted OS not present on target core"),
Self::Disabled => write!(f, "Core disabled"),
Self::InvalidAddress => write!(f, "Invalid address passed to PSCI call"),
Self::Unknown(e) => write!(f, "Unknown PSCI return value {} ({0:#x})", e),
}
}
}
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