From 61642575ab6187c78fe5cd683cfde3a447543f75 Mon Sep 17 00:00:00 2001
From: Sebastian Holzapfel <me@sebholzapfel.com>
Date: Sat, 23 Sep 2023 11:41:39 +0200
Subject: [PATCH] works perfectly in debug mode?!

---
 firmware/build.sh             |  4 ++--
 firmware/litex-fw/src/log.rs  | 10 +---------
 firmware/litex-fw/src/main.rs |  1 +
 3 files changed, 4 insertions(+), 11 deletions(-)

diff --git a/firmware/build.sh b/firmware/build.sh
index bf4acd4..f5e3670 100755
--- a/firmware/build.sh
+++ b/firmware/build.sh
@@ -23,7 +23,7 @@ svd2rust -i $BUILD_DIR/csr.svd --target riscv
 
 # Build the firmware .elf file
 cd $FW_ROOT/litex-fw
-cargo build --target=riscv32imac-unknown-none-elf --release
+cargo build --target=riscv32imac-unknown-none-elf
 
 # Copy it into a binary that litex_term can upload.
-${OBJCOPY} target/riscv32imac-unknown-none-elf/release/litex-fw -O binary $BUILD_DIR/rust-fw.bin
+${OBJCOPY} target/riscv32imac-unknown-none-elf/debug/litex-fw -O binary $BUILD_DIR/rust-fw.bin
diff --git a/firmware/litex-fw/src/log.rs b/firmware/litex-fw/src/log.rs
index f546bac..33c64ed 100644
--- a/firmware/litex-fw/src/log.rs
+++ b/firmware/litex-fw/src/log.rs
@@ -54,18 +54,13 @@ fn default_handler() {
         let offset = peripherals.DMA_WRITER0.offset.read().bits();
         //info!("dmaw0 {:x} {:x}", pending_type, offset);
         unsafe {
-        asm!(
-            "fence iorw, iorw",
-            );
+            asm!("fence iorw, iorw");
         }
 
         if offset == 0x10 {
             for i in 0..0x10 {
                 unsafe {
                     BUF_IN_CP[i] = BUF_IN[i];
-                    fence(Ordering::Release);
-                    BUF_IN_CP[i] = BUF_IN[i];
-                    fence(Ordering::Release);
                 }
             }
         }
@@ -74,9 +69,6 @@ fn default_handler() {
             for i in 0x10..0x20 {
                 unsafe {
                     BUF_IN_CP[i] = BUF_IN[i];
-                    fence(Ordering::Release);
-                    BUF_IN_CP[i] = BUF_IN[i];
-                    fence(Ordering::Release);
                 }
             }
         }
diff --git a/firmware/litex-fw/src/main.rs b/firmware/litex-fw/src/main.rs
index 51bf32a..b5d6eed 100644
--- a/firmware/litex-fw/src/main.rs
+++ b/firmware/litex-fw/src/main.rs
@@ -82,6 +82,7 @@ fn main() -> ! {
     loop {
         log::info!("READ");
         unsafe {
+            asm!("fence iorw, iorw");
             for i in 0..BUF_SZ_WORDS {
                 log::info!("{:x}@{:x}", i, BUF_IN_CP[i]);