nrf52840dk_test_kernel/

main.rs

// Licensed under the Apache License, Version 2.0 or the MIT License.
// SPDX-License-Identifier: Apache-2.0 OR MIT
// Copyright Tock Contributors 2022.

//! Tock kernel for the Nordic Semiconductor nRF52840 development kit (DK).

#![no_std]
#![no_main]
#![deny(missing_docs)]

use capsules_core::test::capsule_test::{CapsuleTestClient, CapsuleTestError};
use core::cell::Cell;
use kernel::component::Component;
use kernel::hil::time::Counter;
use kernel::platform::{KernelResources, SyscallDriverLookup};
use kernel::process::ProcessArray;
use kernel::scheduler::round_robin::RoundRobinSched;
use kernel::utilities::cells::NumericCellExt;
use kernel::{capabilities, create_capability, static_init};
use nrf52840::chip::Nrf52DefaultPeripherals;
use nrf52840::gpio::Pin;
use nrf52840::interrupt_service::Nrf52840DefaultPeripherals;
use nrf52_components::{UartChannel, UartPins};

mod test;

const BUTTON_RST_PIN: Pin = Pin::P0_18;

const UART_RTS: Option<Pin> = Some(Pin::P0_05);
const UART_TXD: Pin = Pin::P0_06;
const UART_CTS: Option<Pin> = Some(Pin::P0_07);
const UART_RXD: Pin = Pin::P0_08;

/// Debug Writer
pub mod io;

// Number of concurrent processes this platform supports.
const NUM_PROCS: usize = 0;

/// Static variables used by io.rs.
static mut PROCESSES: Option<&'static ProcessArray<NUM_PROCS>> = None;
static mut CHIP: Option<&'static nrf52840::chip::NRF52<Nrf52840DefaultPeripherals>> = None;
static mut PROCESS_PRINTER: Option<&'static capsules_system::process_printer::ProcessPrinterText> =
    None;

/// Dummy buffer that causes the linker to reserve enough space for the stack.
#[no_mangle]
#[link_section = ".stack_buffer"]
static mut STACK_MEMORY: [u8; 0x2000] = [0; 0x2000];

//------------------------------------------------------------------------------
// SYSCALL DRIVER TYPE DEFINITIONS
//------------------------------------------------------------------------------

/// Supported drivers by the platform
pub struct Platform {
    scheduler: &'static RoundRobinSched<'static>,
    systick: cortexm4::systick::SysTick,
}

impl SyscallDriverLookup for Platform {
    fn with_driver<F, R>(&self, _driver_num: usize, f: F) -> R
    where
        F: FnOnce(Option<&dyn kernel::syscall::SyscallDriver>) -> R,
    {
        f(None)
    }
}

//------------------------------------------------------------------------------
// TEST LAUNCHER FOR RUNNING TESTS
//------------------------------------------------------------------------------

struct TestLauncher {
    test_index: Cell<usize>,
    peripherals: &'static Nrf52DefaultPeripherals<'static>,
}
impl TestLauncher {
    fn new(peripherals: &'static Nrf52DefaultPeripherals<'static>) -> Self {
        Self {
            test_index: Cell::new(0),
            peripherals,
        }
    }

    fn next(&'static self) {
        let index = self.test_index.get();
        self.test_index.increment();
        match index {
            0 => unsafe { test::sha256_test::run_sha256(self) },
            1 => unsafe { test::hmac_sha256_test::run_hmacsha256(self) },
            2 => unsafe { test::siphash24_test::run_siphash24(self) },
            3 => unsafe { test::aes_test::run_aes128_ctr(&self.peripherals.ecb, self) },
            4 => unsafe { test::aes_test::run_aes128_cbc(&self.peripherals.ecb, self) },
            5 => unsafe { test::aes_test::run_aes128_ecb(&self.peripherals.ecb, self) },
            6 => unsafe { test::ecdsa_p256_test::run_ecdsa_p256(self) },
            _ => kernel::debug!("All tests finished."),
        }
    }
}
impl CapsuleTestClient for TestLauncher {
    fn done(&'static self, _result: Result<(), CapsuleTestError>) {
        self.next();
    }
}

/// This is in a separate, inline(never) function so that its stack frame is
/// removed when this function returns. Otherwise, the stack space used for
/// these static_inits is wasted.
#[inline(never)]
unsafe fn create_peripherals() -> &'static mut Nrf52840DefaultPeripherals<'static> {
    let ieee802154_ack_buf = static_init!(
        [u8; nrf52840::ieee802154_radio::ACK_BUF_SIZE],
        [0; nrf52840::ieee802154_radio::ACK_BUF_SIZE]
    );
    // Initialize chip peripheral drivers
    let nrf52840_peripherals = static_init!(
        Nrf52840DefaultPeripherals,
        Nrf52840DefaultPeripherals::new(ieee802154_ack_buf)
    );

    nrf52840_peripherals
}

impl KernelResources<nrf52840::chip::NRF52<'static, Nrf52840DefaultPeripherals<'static>>>
    for Platform
{
    type SyscallDriverLookup = Self;
    type SyscallFilter = ();
    type ProcessFault = ();
    type Scheduler = RoundRobinSched<'static>;
    type SchedulerTimer = cortexm4::systick::SysTick;
    type WatchDog = ();
    type ContextSwitchCallback = ();

    fn syscall_driver_lookup(&self) -> &Self::SyscallDriverLookup {
        self
    }
    fn syscall_filter(&self) -> &Self::SyscallFilter {
        &()
    }
    fn process_fault(&self) -> &Self::ProcessFault {
        &()
    }
    fn scheduler(&self) -> &Self::Scheduler {
        self.scheduler
    }
    fn scheduler_timer(&self) -> &Self::SchedulerTimer {
        &self.systick
    }
    fn watchdog(&self) -> &Self::WatchDog {
        &()
    }
    fn context_switch_callback(&self) -> &Self::ContextSwitchCallback {
        &()
    }
}

/// Main function called after RAM initialized.
#[no_mangle]
pub unsafe fn main() {
    //--------------------------------------------------------------------------
    // INITIAL SETUP
    //--------------------------------------------------------------------------

    // Apply errata fixes and enable interrupts.
    nrf52840::init();

    // Set up peripheral drivers. Called in separate function to reduce stack
    // usage.
    let nrf52840_peripherals = create_peripherals();

    // Set up circular peripheral dependencies.
    nrf52840_peripherals.init();
    let base_peripherals = &nrf52840_peripherals.nrf52;

    // Create an array to hold process references.
    let processes = components::process_array::ProcessArrayComponent::new()
        .finalize(components::process_array_component_static!(NUM_PROCS));
    PROCESSES = Some(processes);

    // Setup space to store the core kernel data structure.
    let board_kernel = static_init!(kernel::Kernel, kernel::Kernel::new(processes.as_slice()));

    // Create (and save for panic debugging) a chip object to setup low-level
    // resources (e.g. MPU, systick).
    let chip = static_init!(
        nrf52840::chip::NRF52<Nrf52840DefaultPeripherals>,
        nrf52840::chip::NRF52::new(nrf52840_peripherals)
    );
    CHIP = Some(chip);

    // Do nRF configuration and setup. This is shared code with other nRF-based
    // platforms.
    nrf52_components::startup::NrfStartupComponent::new(
        false,
        BUTTON_RST_PIN,
        nrf52840::uicr::Regulator0Output::DEFAULT,
        &base_peripherals.nvmc,
    )
    .finalize(());

    //--------------------------------------------------------------------------
    // CAPABILITIES
    //--------------------------------------------------------------------------

    // Create capabilities that the board needs to call certain protected kernel
    // functions.
    let main_loop_capability = create_capability!(capabilities::MainLoopCapability);

    //--------------------------------------------------------------------------
    // TIMER
    //--------------------------------------------------------------------------

    let rtc = &base_peripherals.rtc;
    let _ = rtc.start();
    let mux_alarm = components::alarm::AlarmMuxComponent::new(rtc)
        .finalize(components::alarm_mux_component_static!(nrf52840::rtc::Rtc));

    //--------------------------------------------------------------------------
    // UART & CONSOLE & DEBUG
    //--------------------------------------------------------------------------

    let uart_channel = nrf52_components::UartChannelComponent::new(
        UartChannel::Pins(UartPins::new(UART_RTS, UART_TXD, UART_CTS, UART_RXD)),
        mux_alarm,
        &base_peripherals.uarte0,
    )
    .finalize(nrf52_components::uart_channel_component_static!(
        nrf52840::rtc::Rtc
    ));

    // Virtualize the UART channel for the console and for kernel debug.
    let uart_mux = components::console::UartMuxComponent::new(uart_channel, 115200)
        .finalize(components::uart_mux_component_static!());

    // Create the debugger object that handles calls to `debug!()`.
    components::debug_writer::DebugWriterComponent::new(
        uart_mux,
        create_capability!(capabilities::SetDebugWriterCapability),
    )
    .finalize(components::debug_writer_component_static!());

    //--------------------------------------------------------------------------
    // NRF CLOCK SETUP
    //--------------------------------------------------------------------------

    nrf52_components::NrfClockComponent::new(&base_peripherals.clock).finalize(());

    //--------------------------------------------------------------------------
    // PLATFORM AND SCHEDULER
    //--------------------------------------------------------------------------

    let scheduler = components::sched::round_robin::RoundRobinComponent::new(processes)
        .finalize(components::round_robin_component_static!(NUM_PROCS));

    let platform = Platform {
        scheduler,
        systick: cortexm4::systick::SysTick::new_with_calibration(64000000),
    };

    let test_launcher = static_init!(TestLauncher, TestLauncher::new(base_peripherals));

    //--------------------------------------------------------------------------
    // TESTS
    //--------------------------------------------------------------------------

    test_launcher.next();

    //--------------------------------------------------------------------------
    // KERNEL LOOP
    //--------------------------------------------------------------------------

    board_kernel.kernel_loop(
        &platform,
        chip,
        None::<&kernel::ipc::IPC<0>>,
        &main_loop_capability,
    );
}