From 74bd81f87fdd193ec7d9854ccb69ce76fef98e4f Mon Sep 17 00:00:00 2001
From: Astro <astro@spaceboyz.net>
Date: Sun, 9 Jun 2019 02:23:37 +0200
Subject: [PATCH] eth: add safety asserts

---
 src/eth/mod.rs | 1 +
 src/eth/rx.rs  | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/src/eth/mod.rs b/src/eth/mod.rs
index b7e400f..87a3f27 100644
--- a/src/eth/mod.rs
+++ b/src/eth/mod.rs
@@ -277,6 +277,7 @@ impl<'rx> Eth<'rx> {
     pub fn start_rx(&mut self, rx_buffers: [&'rx mut [u8]; rx::DESCS]) {
         self.rx = Some(rx::DescList::new(rx_buffers));
         let list_addr = self.rx.as_ref().unwrap() as *const _ as u32;
+        assert!(list_addr & 0b11 == 0);
         self.regs.rx_qbar.write(
             regs::RxQbar::zeroed()
                 .rx_q_baseaddr(list_addr >> 2)
diff --git a/src/eth/rx.rs b/src/eth/rx.rs
index b4dd25b..ae4a86b 100644
--- a/src/eth/rx.rs
+++ b/src/eth/rx.rs
@@ -45,7 +45,9 @@ impl<'a> DescList<'a> {
     pub fn new(buffers: [&'a mut [u8]; DESCS]) -> Self {
         let mut list: [DescEntry; DESCS] = unsafe { uninitialized() };
         for i in 0..DESCS {
+            assert!(buffers[i].len() >= 1536);
             let buffer_addr = &mut buffers[i][0] as *mut _ as u32;
+            assert!(buffer_addr & 0b11 == 0);
             list[i].word0.write(
                 DescWord0::zeroed()
                     .used(false)