diff options
Diffstat (limited to 'src/lib.rs')
| -rw-r--r-- | src/lib.rs | 104 |
1 files changed, 20 insertions, 84 deletions
@@ -1,104 +1,40 @@ //! Low level access to Cortex-M processors //! -//! This crate provides access to: +//! This crate provides: //! -//! - Core peripherals like NVIC, SCB and SysTick. -//! - Core registers like CONTROL, MSP and PSR. +//! - Access to core peripherals like NVIC, SCB and SysTick. +//! - Access to core registers like CONTROL, MSP and PSR. //! - Interrupt manipulation mechanisms //! - Data structures like the vector table -//! - Miscellaneous assembly instructions like `bkpt` -//! +//! - Safe wrappers around assembly instructions like `bkpt` +#![cfg_attr(target_arch = "arm", feature(core_intrinsics))] #![deny(missing_docs)] #![deny(warnings)] #![feature(asm)] #![feature(const_fn)] +#![feature(naked_functions)] #![no_std] +pub extern crate cortex_m_semihosting as semihosting; extern crate volatile_register; +#[macro_use] +mod macros; + +#[macro_use] pub mod asm; +pub mod ctxt; +pub mod exception; pub mod interrupt; +pub mod itm; pub mod peripheral; pub mod register; -mod exception; - -pub use exception::Exception; - -/// Stack frame -#[repr(C)] -pub struct StackFrame { - /// (General purpose) Register 0 - pub r0: u32, - /// (General purpose) Register 1 - pub r1: u32, - /// (General purpose) Register 2 - pub r2: u32, - /// (General purpose) Register 3 - pub r3: u32, - /// (General purpose) Register 12 - pub r12: u32, - /// Linker Register - pub lr: u32, - /// Program Counter - pub pc: u32, - /// Program Status Register - pub xpsr: u32, -} - -/// Vector Table -/// -/// # References -/// -/// - ARMv7-M Architecture Reference Manual (issue E.b) - Section B1.5 - ARMv7-M exception model -#[repr(C)] -pub struct VectorTable { - /// Reset value of the Main Stack Pointer (MSP) - pub sp_main: &'static (), - /// Reset - pub reset: extern "C" fn() -> !, - /// Non Maskable Interrupt - pub nmi: Option<Handler>, - /// Hard Fault - pub hard_fault: Option<Handler>, - /// Memory Management - pub mem_manage: Option<Handler>, - /// Bus Fault - pub bus_fault: Option<Handler>, - /// Usage Fault - pub usage_fault: Option<Handler>, - reserved0: [u32; 4], - /// Supervisor Call - pub svcall: Option<Handler>, - /// Debug Monitor - pub debug_monitor: Option<Handler>, - reserved1: u32, - /// PendSV - pub pendsv: Option<Handler>, - /// SysTick - pub sys_tick: Option<Handler>, - /// Interrupts. An IMPLEMENTATION DEFINED number of them. - pub interrupts: [Option<Handler>; 0], -} - -/// Returns the vector table -pub fn vector_table() -> &'static VectorTable { - unsafe { deref(peripheral::scb().vtor.read() as usize) } -} - -/// Exception/Interrupt Handler -pub type Handler = unsafe extern "C" fn(); - -#[cfg(test)] -fn address<T>(r: &T) -> usize { - r as *const T as usize -} - -unsafe fn deref<T>(a: usize) -> &'static T { - &*(a as *const T) -} - -unsafe fn deref_mut<T>(a: usize) -> &'static mut T { - &mut *(a as *mut T) +/// A reserved spot in the vector table +#[derive(Clone, Copy)] +#[repr(u32)] +pub enum Reserved { + /// Reserved + Vector = 0, } |