cortexm33/
lib.rs

1// Licensed under the Apache License, Version 2.0 or the MIT License.
2// SPDX-License-Identifier: Apache-2.0 OR MIT
3// Copyright Tock Contributors 2022.
4
5//! Shared implementations for ARM Cortex-M33 MCUs.
6
7#![no_std]
8
9use core::fmt::Write;
10
11pub mod mpu_v8m;
12
13pub mod mpu {
14    use crate::mpu_v8m;
15    use kernel::utilities::StaticRef;
16
17    // Note: Cortex-M33 supports up to 16 regions.
18    pub type MPU<const NUM_REGIONS: usize> = mpu_v8m::MPU<NUM_REGIONS>;
19
20    const MPU_BASE_ADDRESS: StaticRef<crate::mpu_v8m::MpuRegisters> =
21        unsafe { StaticRef::new(0xE000ED90 as *const crate::mpu_v8m::MpuRegisters) };
22
23    pub unsafe fn new<const NUM_REGIONS: usize>() -> mpu_v8m::MPU<NUM_REGIONS> {
24        mpu_v8m::MPU::new(MPU_BASE_ADDRESS)
25    }
26}
27
28pub use cortexm::initialize_ram_jump_to_main;
29pub use cortexm::interrupt_mask;
30pub use cortexm::nvic;
31pub use cortexm::scb;
32pub use cortexm::support;
33pub use cortexm::systick;
34pub use cortexm::thread_id;
35pub use cortexm::unhandled_interrupt;
36pub use cortexm::CortexMVariant;
37
38// Enum with no variants to ensure that this type is not instantiable. It is
39// only used to pass architecture-specific constants and functions via the
40// `CortexMVariant` trait.
41pub enum CortexM33 {}
42
43impl cortexm::CortexMVariant for CortexM33 {
44    const GENERIC_ISR: unsafe extern "C" fn() = cortexv7m::generic_isr_arm_v7m;
45    const SYSTICK_HANDLER: unsafe extern "C" fn() = cortexv7m::systick_handler_arm_v7m;
46    const SVC_HANDLER: unsafe extern "C" fn() = cortexv7m::svc_handler_arm_v7m;
47    const HARD_FAULT_HANDLER: unsafe extern "C" fn() = cortexv7m::hard_fault_handler_arm_v7m;
48
49    #[cfg(all(target_arch = "arm", target_os = "none"))]
50    unsafe fn switch_to_user(
51        user_stack: *const usize,
52        process_regs: &mut [usize; 8],
53    ) -> *const usize {
54        cortexv7m::switch_to_user_arm_v7m(user_stack, process_regs)
55    }
56
57    #[cfg(not(all(target_arch = "arm", target_os = "none")))]
58    unsafe fn switch_to_user(
59        _user_stack: *const usize,
60        _process_regs: &mut [usize; 8],
61    ) -> *const usize {
62        unimplemented!()
63    }
64
65    #[inline]
66    unsafe fn print_cortexm_state(writer: &mut dyn Write) {
67        cortexm::print_cortexm_state(writer)
68    }
69}
70
71pub mod syscall {
72    pub type SysCall = cortexm::syscall::SysCall<crate::CortexM33>;
73}
cortexm33/lib.rs

cortexm33/
lib.rs
