zynq-rs/libcortex_a9/src/lib.rs

73 lines
2.2 KiB
Rust
Raw Normal View History

#![no_std]
#![feature(llvm_asm, global_asm)]
#![feature(never_type)]
#![feature(const_fn)]
2020-04-09 08:49:24 +08:00
extern crate alloc;
2019-05-05 20:56:23 +08:00
pub mod asm;
pub mod cache;
mod fpu;
pub mod l2c;
2019-06-17 09:32:10 +08:00
pub mod mmu;
2019-11-18 09:13:54 +08:00
pub mod mutex;
pub mod regs;
2020-08-04 12:59:23 +08:00
pub mod semaphore;
pub mod sync_channel;
2020-06-18 06:51:13 +08:00
mod uncached;
2020-07-03 16:02:34 +08:00
pub use fpu::enable_fpu;
pub use uncached::UncachedSlice;
2019-05-31 02:30:19 +08:00
global_asm!(include_str!("exceptions.s"));
#[inline]
pub fn spin_lock_yield() {
#[cfg(feature = "power_saving")]
asm::wfe();
}
#[inline]
pub fn notify_spin_lock() {
#[cfg(feature = "power_saving")]
{
asm::dsb();
asm::sev();
}
}
#[macro_export]
/// Interrupt handler, which setup the stack and jump to actual interrupt handler.
/// - `name` is the name of the interrupt, should be the same as the one defined in vector table.
/// - `name2` is the name for the actual handler, should be different from name.
/// - `stack0` is the stack for the interrupt handler when called from core0.
/// - `stack1` is the stack for the interrupt handler when called from core1.
/// - `body` is the body of the actual interrupt handler, should be a normal unsafe rust function
/// body.
///
/// Note that the interrupt handler would use the same stack as normal programs by default, so
/// interrupt handlers should not return to normal program or it may corrupt the stack.
macro_rules! interrupt_handler {
($name:ident, $name2:ident, $stack0:ident, $stack1:ident, $body:block) => {
#[link_section = ".text.boot"]
#[no_mangle]
#[naked]
pub unsafe extern "C" fn $name() -> ! {
asm!(
// setup SP, depending on CPU 0 or 1
"mrc p15, #0, r0, c0, c0, #5",
concat!("movw r1, :lower16:", stringify!($stack0)),
concat!("movt r1, :upper16:", stringify!($stack0)),
"tst r0, #3",
concat!("movwne r1, :lower16:", stringify!($stack1)),
concat!("movtne r1, :upper16:", stringify!($stack1)),
"mov sp, r1",
concat!("bl ", stringify!($name2)),
options(noreturn)
);
}
#[no_mangle]
pub unsafe extern "C" fn $name2() -> ! $body
};
}