cortex-a

Low level access to Cortex-A processors.

Currently Supported Architectures

• [x] AArch64
• [ ] AArch32

Minimum Supported Rust Version

Requires rustc 1.45.0 or later due to use of the new asm!() syntax.

Usage

Example from https://github.com/rust-embedded/rust-raspi3-OS-tutorials

```rust unsafe fn el2toel1transition() -> ! { // Enable timer counter registers for EL1. CNTHCTLEL2.write(CNTHCTLEL2::EL1PCEN::SET + CNTHCTLEL2::EL1PCTEN::SET);

// No offset for reading the counters.
CNTVOFF_EL2.set(0);

// Set EL1 execution state to AArch64.
HCR_EL2.write(HCR_EL2::RW::EL1IsAarch64);

// Set up a simulated exception return.
SPSR_EL2.write(
    SPSR_EL2::D::Masked
        + SPSR_EL2::A::Masked
        + SPSR_EL2::I::Masked
        + SPSR_EL2::F::Masked
        + SPSR_EL2::M::EL1h,
);

```

Disclaimer

Descriptive comments in the source files are taken from the ARM Architecture Reference Manual ARMv8, for ARMv8-A architecture profile.

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT License (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.