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58 lines
2.0 KiB
Rust
58 lines
2.0 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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//! Driver support.
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//--------------------------------------------------------------------------------------------------
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// Public Definitions
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//--------------------------------------------------------------------------------------------------
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/// Driver interfaces.
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pub mod interface {
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use alloc::vec::Vec;
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/// Device Driver functions.
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pub trait DeviceDriver {
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/// Return a compatibility string for identifying the driver.
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fn compatible(&self) -> &'static str;
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/// Called by the kernel to bring up the device.
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///
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/// # Safety
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///
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/// - During init, drivers might do stuff with system-wide impact.
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unsafe fn init(&self) -> Result<(), &'static str> {
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Ok(())
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}
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/// Called by the kernel to register and enable the device's IRQ handlers, if any.
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///
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/// Rust's type system will prevent a call to this function unless the calling instance
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/// itself has static lifetime.
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fn register_and_enable_irq_handler(&'static self) -> Result<(), &'static str> {
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Ok(())
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}
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}
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/// Device driver management functions.
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///
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/// The `BSP` is supposed to supply one global instance.
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pub trait DriverManager {
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/// Instantiate all drivers.
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///
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/// # Safety
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///
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/// Must be called before `all_device_drivers`.
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unsafe fn instantiate_drivers(&self) -> Result<(), &'static str>;
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/// Return a vector of references to all `BSP`-instantiated drivers.
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fn all_device_drivers(&self) -> &Vec<&(dyn DeviceDriver + Sync)>;
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/// Minimal code needed to bring up the console in QEMU (for testing only). This is often
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/// less steps than on real hardware due to QEMU's abstractions.
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#[cfg(feature = "test_build")]
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fn qemu_bring_up_console(&self);
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}
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}
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