From a9abb40615f9d9002b64b78ff23ac1fc363bd040 Mon Sep 17 00:00:00 2001
From: Sean Cross <sean@xobs.io>
Date: Fri, 3 Jan 2020 14:13:18 +0800
Subject: [PATCH] index: add some description of xous

Signed-off-by: Sean Cross <sean@xobs.io>
---
 index.html | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/index.html b/index.html
index bf6771d..2517d96 100644
--- a/index.html
+++ b/index.html
@@ -223,6 +223,41 @@
                 </section>
             </section>
 
+            <section>
+                <section>
+                    <h2>Xous: System Design</h2>
+                    <aside class="notes">
+                        Xous is, currently, very much under development.  However, there has
+                        been a lot of planning.
+                    </aside>
+                </section>
+
+                <section>
+                    <h2>Xous: Memory Model</h2>
+                    <aside class="notes">
+                        Xous will base its memory model on the Rust borrow checker.  That is,
+                        shared memory will be used for IPC.  If one process wishes to get a
+                        response from another, it can pass pages via a mutable borrow.  If
+                        a process wishes to share pages across multiple process, then only an
+                        immutable borrow may be made, and the sharing process cannot access
+                        pages until all processes have returned the memory.
+
+                        A process can move memory into another, which for example is how
+                        process spawning works.  In such a case, memory is no longer available
+                        in the sending process.
+                    </aside>
+                </section>
+
+                <section>
+                    <h2>Xous: Missing Features</h2>
+                    <aside class="notes">
+                        Xous has no fork().  Instead it will have spawn().
+
+                        Shared libraries aren't available at the start, but may come later.
+                    </aside>
+                </section>
+            </section>
+
         </div>
     </div> <!-- class="reveal" -->
     <!-- End of main presentation -->