forked from M-Labs/zynq-rs
98 lines
2.4 KiB
Rust
98 lines
2.4 KiB
Rust
use alloc::alloc::Layout;
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use core::alloc::GlobalAlloc;
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use core::ptr::NonNull;
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use libcortex_a9::{
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mutex::Mutex,
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regs::MPIDR
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};
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use libregister::RegisterR;
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use linked_list_allocator::Heap;
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#[cfg(not(feature = "alloc_core"))]
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use libboard_zynq::ddr::DdrRam;
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#[global_allocator]
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static ALLOCATOR: CortexA9Alloc = CortexA9Alloc(
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Mutex::new(Heap::empty()),
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Mutex::new(Heap::empty()),
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);
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struct CortexA9Alloc(Mutex<Heap>, Mutex<Heap>);
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unsafe impl Sync for CortexA9Alloc {}
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unsafe impl GlobalAlloc for CortexA9Alloc {
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unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
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if cfg!(not(feature = "alloc_core")) || MPIDR.read().cpu_id() == 0 {
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&self.0
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} else {
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&self.1
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}
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.lock()
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.allocate_first_fit(layout)
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.ok()
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.map_or(0 as *mut u8, |allocation| allocation.as_ptr())
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}
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unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
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if cfg!(not(feature = "alloc_core")) || MPIDR.read().cpu_id() == 0 {
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&self.0
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} else {
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&self.1
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}
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.lock()
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.deallocate(NonNull::new_unchecked(ptr), layout)
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}
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}
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#[cfg(not(feature = "alloc_core"))]
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pub fn init_alloc_ddr(ddr: &mut DdrRam) {
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unsafe {
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ALLOCATOR
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.0
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.lock()
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.init(ddr.ptr::<u8>() as usize, ddr.size());
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}
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}
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extern "C" {
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static __heap0_start: usize;
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static __heap0_end: usize;
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#[cfg(feature = "alloc_core")]
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static __heap1_start: usize;
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#[cfg(feature = "alloc_core")]
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static __heap1_end: usize;
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}
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pub fn init_alloc_core0() {
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unsafe {
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let start = &__heap0_start as *const usize as usize;
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let end = &__heap0_end as *const usize as usize;
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ALLOCATOR.0.lock().init(start, end - start);
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}
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}
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#[cfg(feature = "alloc_core")]
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pub fn init_alloc_core1() {
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unsafe {
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let start = &__heap1_start as *const usize as usize;
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let end = &__heap1_end as *const usize as usize;
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ALLOCATOR.1.lock().init(start, end - start);
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}
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}
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#[alloc_error_handler]
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fn alloc_error(layout: core::alloc::Layout) -> ! {
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let id = MPIDR.read().cpu_id();
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let used = if cfg!(not(feature = "alloc_core")) || id == 0 {
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ALLOCATOR.0.lock().used()
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} else {
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ALLOCATOR.1.lock().used()
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};
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panic!(
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"Core {} alloc_error, layout: {:?}, used memory: {}",
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id,
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layout,
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used
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);
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}
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