From 81275bfa4f41e2066770087f3a33cad4227eab41 Mon Sep 17 00:00:00 2001
From: Jorge Aparicio <jorge@japaric.io>
Date: Thu, 13 Jun 2019 23:56:59 +0200
Subject: rtfm-syntax refactor + heterogeneous multi-core support

---
 mc/src/lib.rs | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 mc/src/lib.rs

(limited to 'mc/src')

diff --git a/mc/src/lib.rs b/mc/src/lib.rs
new file mode 100644
index 0000000..d86c0e8
--- /dev/null
+++ b/mc/src/lib.rs
@@ -0,0 +1,99 @@
+//! Fake multi-core PAC
+
+#![no_std]
+
+use core::{
+    cmp::Ordering,
+    ops::{Add, Sub},
+};
+
+use cortex_m::interrupt::Nr;
+use rtfm::Monotonic;
+
+// Fake priority bits
+pub const NVIC_PRIO_BITS: u8 = 3;
+
+pub struct CrossPend;
+
+pub fn xpend(_core: u8, _interrupt: impl Nr) {}
+
+/// Fake monotonic timer
+pub struct MT;
+
+unsafe impl Monotonic for MT {
+    type Instant = Instant;
+
+    fn ratio() -> u32 {
+        1
+    }
+
+    unsafe fn reset() {
+        (0xE0001004 as *mut u32).write_volatile(0)
+    }
+
+    fn now() -> Instant {
+        unsafe { Instant((0xE0001004 as *const u32).read_volatile() as i32) }
+    }
+
+    fn zero() -> Instant {
+        Instant(0)
+    }
+}
+
+#[derive(Clone, Copy, Eq, PartialEq)]
+pub struct Instant(i32);
+
+impl Add<u32> for Instant {
+    type Output = Instant;
+
+    fn add(self, rhs: u32) -> Self {
+        Instant(self.0.wrapping_add(rhs as i32))
+    }
+}
+
+impl Sub for Instant {
+    type Output = u32;
+
+    fn sub(self, rhs: Self) -> u32 {
+        self.0.checked_sub(rhs.0).unwrap() as u32
+    }
+}
+
+impl Ord for Instant {
+    fn cmp(&self, rhs: &Self) -> Ordering {
+        self.0.wrapping_sub(rhs.0).cmp(&0)
+    }
+}
+
+impl PartialOrd for Instant {
+    fn partial_cmp(&self, rhs: &Self) -> Option<Ordering> {
+        Some(self.cmp(rhs))
+    }
+}
+
+// Fake interrupts
+pub enum Interrupt {
+    I0,
+    I1,
+    I2,
+    I3,
+    I4,
+    I5,
+    I6,
+    I7,
+}
+
+unsafe impl Nr for Interrupt {
+    fn nr(&self) -> u8 {
+        match self {
+            Interrupt::I0 => 0,
+            Interrupt::I1 => 1,
+            Interrupt::I2 => 2,
+            Interrupt::I3 => 3,
+            Interrupt::I4 => 4,
+            Interrupt::I5 => 5,
+            Interrupt::I6 => 6,
+            Interrupt::I7 => 7,
+        }
+    }
+}
-- 
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