runtime/irq: use spinlock functions instead of asm.

Closes #81

src/Cargo.lock

@@ -201,7 +201,7 @@ dependencies = [
 [[package]]
 name = "libasync"
 version = "0.0.0"
-source = "git+https://git.m-labs.hk/M-Labs/zc706.git#b65606f2d02fab273645835a102048b23c3394f7"
+source = "git+https://git.m-labs.hk/M-Labs/zc706.git#25c6d5eeaa6243724700e975e3935a5965c09a27"
 dependencies = [
  "embedded-hal",
  "libcortex_a9",
@@ -213,7 +213,7 @@ dependencies = [
 [[package]]
 name = "libboard_zynq"
 version = "0.0.0"
-source = "git+https://git.m-labs.hk/M-Labs/zc706.git#b65606f2d02fab273645835a102048b23c3394f7"
+source = "git+https://git.m-labs.hk/M-Labs/zc706.git#25c6d5eeaa6243724700e975e3935a5965c09a27"
 dependencies = [
  "bit_field",
  "embedded-hal",
@@ -237,7 +237,7 @@ dependencies = [
 [[package]]
 name = "libcortex_a9"
 version = "0.0.0"
-source = "git+https://git.m-labs.hk/M-Labs/zc706.git#b65606f2d02fab273645835a102048b23c3394f7"
+source = "git+https://git.m-labs.hk/M-Labs/zc706.git#25c6d5eeaa6243724700e975e3935a5965c09a27"
 dependencies = [
  "bit_field",
  "libregister",
@@ -252,7 +252,7 @@ checksum = "c7d73b3f436185384286bd8098d17ec07c9a7d2388a6599f824d8502b529702a"
 [[package]]
 name = "libregister"
 version = "0.0.0"
-source = "git+https://git.m-labs.hk/M-Labs/zc706.git#b65606f2d02fab273645835a102048b23c3394f7"
+source = "git+https://git.m-labs.hk/M-Labs/zc706.git#25c6d5eeaa6243724700e975e3935a5965c09a27"
 dependencies = [
  "bit_field",
  "vcell",
@@ -262,7 +262,7 @@ dependencies = [
 [[package]]
 name = "libsupport_zynq"
 version = "0.0.0"
-source = "git+https://git.m-labs.hk/M-Labs/zc706.git#b65606f2d02fab273645835a102048b23c3394f7"
+source = "git+https://git.m-labs.hk/M-Labs/zc706.git#25c6d5eeaa6243724700e975e3935a5965c09a27"
 dependencies = [
  "compiler_builtins",
  "libboard_zynq",

src/runtime/src/irq.rs

@@ -2,6 +2,7 @@ use libboard_zynq::{gic, mpcore, println, stdio};
 use libcortex_a9::{
     asm,
     regs::{MPIDR, SP},
+    spin_lock_yield, notify_spin_lock
 };
 use libregister::{RegisterR, RegisterW};
 use core::sync::atomic::{AtomicBool, Ordering};
@@ -27,7 +28,7 @@ pub unsafe extern "C" fn IRQ() {
             SP.write(&mut __stack1_start as *mut _ as u32);
             asm::enable_irq();
             CORE1_RESTART.store(false, Ordering::Relaxed);
-            asm::sev();
+            notify_spin_lock();
             main_core1();
         }
     }
@@ -41,6 +42,6 @@ pub fn restart_core1() {
     CORE1_RESTART.store(true, Ordering::Relaxed);
     interrupt_controller.send_sgi(gic::InterruptId(0), gic::CPUCore::Core1.into());
     while CORE1_RESTART.load(Ordering::Relaxed) {
-        asm::wfe();
+        spin_lock_yield();
     }
 }