From 3e02980c20429087145764c6a419ec4f68f96977 Mon Sep 17 00:00:00 2001
From: Astro <astro@spaceboyz.net>
Date: Sat, 9 May 2020 02:32:29 +0200
Subject: [PATCH] libboard_zynq: fix access to "full" 1022 MB on target_zc706

---
 libboard_zynq/src/ddr/mod.rs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/libboard_zynq/src/ddr/mod.rs b/libboard_zynq/src/ddr/mod.rs
index 23084c4..924513a 100644
--- a/libboard_zynq/src/ddr/mod.rs
+++ b/libboard_zynq/src/ddr/mod.rs
@@ -183,6 +183,14 @@ impl DdrRam {
 
     /// Reset DDR controller
     fn reset_ddrc(&mut self) {
+        #[cfg(feature = "target_zc706")]
+        unsafe {
+            // row/column address bits
+            self.regs.dram_addr_map_bank.write(0x00000777);
+            self.regs.dram_addr_map_col.write(0xFFF00000);
+            self.regs.dram_addr_map_row.write(0x0F666666);
+        }
+
         #[cfg(feature = "target_zc706")]
         let width = regs::DataBusWidth::Width32bit;
         #[cfg(feature = "target_cora_z7_10")]
@@ -209,9 +217,11 @@ impl DdrRam {
         0x0010_0000 as *mut _
     }
 
+    /// actually there's 1 MB more but starting at 0x0000_0000
+    /// overlaps with OCM.
     pub fn size(&self) -> usize {
         #[cfg(feature = "target_zc706")]
-        let megabytes = 511;
+        let megabytes = 1022;
         #[cfg(feature = "target_cora_z7_10")]
         let megabytes = 511;