#![no_std]
#![feature(asm_experimental_arch, naked_functions)]
#![allow(asm_sub_register)]
#![allow(named_asm_labels)]
use core::arch::asm;
pub use r0::{init_data, zero_bss};
pub use xtensa_lx_rt_proc_macros::{entry, exception, interrupt, pre_init};
pub mod exception;
pub mod interrupt;
#[doc(hidden)]
#[no_mangle]
pub unsafe extern "C" fn DefaultPreInit() {}
#[doc(hidden)]
#[no_mangle]
pub unsafe extern "C" fn Reset() -> ! {
extern "C" {
static mut _bss_start: u32;
static mut _bss_end: u32;
static mut _data_start: u32;
static mut _data_end: u32;
static _sidata: u32;
static mut _init_start: u32;
}
extern "Rust" {
fn main() -> !;
fn __pre_init();
fn __post_init();
fn __zero_bss() -> bool;
fn __init_data() -> bool;
}
__pre_init();
if __zero_bss() {
r0::zero_bss(&mut _bss_start, &mut _bss_end);
}
if __init_data() {
r0::init_data(&mut _data_start, &mut _data_end, &_sidata);
}
reset_internal_timers();
set_vecbase(&_init_start as *const u32);
__post_init();
main();
}
#[doc(hidden)]
#[no_mangle]
#[rustfmt::skip]
pub unsafe extern "Rust" fn default_post_init() {}
#[doc(hidden)]
#[inline]
unsafe fn reset_internal_timers() {
#[cfg(any(
XCHAL_HAVE_TIMER0,
XCHAL_HAVE_TIMER1,
XCHAL_HAVE_TIMER2,
XCHAL_HAVE_TIMER3
))]
{
let value = 0;
cfg_asm!(
{
#[cfg(XCHAL_HAVE_TIMER0)]
"wsr.ccompare0 {0}",
#[cfg(XCHAL_HAVE_TIMER1)]
"wsr.ccompare1 {0}",
#[cfg(XCHAL_HAVE_TIMER2)]
"wsr.ccompare2 {0}",
#[cfg(XCHAL_HAVE_TIMER3)]
"wsr.ccompare3 {0}",
"isync",
}, in(reg) value, options(nostack));
}
}
extern "C" {
#[cfg(XCHAL_HAVE_TIMER0)]
pub fn Timer0(level: u32, save_frame: &mut crate::exception::Context);
#[cfg(XCHAL_HAVE_TIMER1)]
pub fn Timer1(level: u32, save_frame: &mut crate::exception::Context);
#[cfg(XCHAL_HAVE_TIMER2)]
pub fn Timer2(level: u32, save_frame: &mut crate::exception::Context);
#[cfg(XCHAL_HAVE_TIMER3)]
pub fn Timer3(level: u32, save_frame: &mut crate::exception::Context);
#[cfg(XCHAL_HAVE_PROFILING)]
pub fn Profiling(level: u32, save_frame: &mut crate::exception::Context);
#[cfg(XCHAL_HAVE_SOFTWARE0)]
pub fn Software0(level: u32, save_frame: &mut crate::exception::Context);
#[cfg(XCHAL_HAVE_SOFTWARE1)]
pub fn Software1(level: u32, save_frame: &mut crate::exception::Context);
#[cfg(XCHAL_HAVE_NMI)]
pub fn NMI(level: u32, save_frame: &mut crate::exception::Context);
}
#[doc(hidden)]
#[inline]
unsafe fn set_vecbase(base: *const u32) {
asm!("wsr.vecbase {0}", in(reg) base, options(nostack));
}
#[doc(hidden)]
#[no_mangle]
#[rustfmt::skip]
pub extern "Rust" fn default_mem_hook() -> bool {
true }
#[macro_export]
macro_rules! cfg_asm {
(@inner, [$($x:tt)*], [$($opts:tt)*], ) => {
asm!($($x)* $($opts)*)
};
(@inner, [$($x:tt)*], [$($opts:tt)*], #[cfg($meta:meta)] $asm:literal, $($rest:tt)*) => {
#[cfg($meta)]
cfg_asm!(@inner, [$($x)* $asm,], [$($opts)*], $($rest)*);
#[cfg(not($meta))]
cfg_asm!(@inner, [$($x)*], [$($opts)*], $($rest)*)
};
(@inner, [$($x:tt)*], [$($opts:tt)*], $asm:literal, $($rest:tt)*) => {
cfg_asm!(@inner, [$($x)* $asm,], [$($opts)*], $($rest)*)
};
({$($asms:tt)*}, $($opts:tt)*) => {
cfg_asm!(@inner, [], [$($opts)*], $($asms)*)
};
}