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32 lines
1.1 KiB
Rust
32 lines
1.1 KiB
Rust
// SPDX-License-Identifier: MIT OR Apache-2.0
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//
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// Copyright (c) 2018-2022 Andre Richter <andre.o.richter@gmail.com>
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//! Architectural synchronous and asynchronous exception handling.
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//!
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//! # Orientation
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//!
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//! Since arch modules are imported into generic modules using the path attribute, the path of this
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//! file is:
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//!
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//! crate::exception::arch_exception
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use aarch64_cpu::registers::*;
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use tock_registers::interfaces::Readable;
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//--------------------------------------------------------------------------------------------------
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// Public Code
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//--------------------------------------------------------------------------------------------------
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use crate::exception::PrivilegeLevel;
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/// The processing element's current privilege level.
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pub fn current_privilege_level() -> (PrivilegeLevel, &'static str) {
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let el = CurrentEL.read_as_enum(CurrentEL::EL);
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match el {
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Some(CurrentEL::EL::Value::EL2) => (PrivilegeLevel::Hypervisor, "EL2"),
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Some(CurrentEL::EL::Value::EL1) => (PrivilegeLevel::Kernel, "EL1"),
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Some(CurrentEL::EL::Value::EL0) => (PrivilegeLevel::User, "EL0"),
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_ => (PrivilegeLevel::Unknown, "Unknown"),
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}
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}
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