From 5332587de658ca391089e67db7143299eec78d77 Mon Sep 17 00:00:00 2001
From: pca006132 <jl@m-labs.hk>
Date: Wed, 10 Jun 2020 12:54:50 +0800
Subject: [PATCH] Changed mutability

---
 experiments/src/main.rs           | 11 ++++-------
 libboard_zynq/src/sdio/adma.rs    |  2 +-
 libboard_zynq/src/sdio/sd_card.rs |  2 +-
 libcortex_a9/src/cache.rs         |  2 +-
 4 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/experiments/src/main.rs b/experiments/src/main.rs
index c7594ad..32c91b5 100644
--- a/experiments/src/main.rs
+++ b/experiments/src/main.rs
@@ -93,14 +93,11 @@ pub fn main_core0() {
         };
         const SIZE: usize = 512 * 2 + 1;
         let mut sd_card = result.unwrap();
+        {
+            let buffer: [u8; SIZE] = [5; SIZE];
+            sd_card.write_block(0x0, 2, &buffer).unwrap();
+        }
         let mut buffer: [u8; SIZE] = [0; SIZE];
-        for i in 0..buffer.len() {
-            buffer[i] = (i % 16) as u8;
-        }
-        sd_card.write_block(0x0, 2, &mut buffer).unwrap();
-        for i in 0..buffer.len() {
-            buffer[i] = 0;
-        }
         sd_card.read_block(0x1, 2, &mut buffer[1..]).unwrap();
         for i in 0..buffer.len() {
             info!("buffer[{}] = {}", i, buffer[i]);
diff --git a/libboard_zynq/src/sdio/adma.rs b/libboard_zynq/src/sdio/adma.rs
index 9f80b7f..82b4bf3 100644
--- a/libboard_zynq/src/sdio/adma.rs
+++ b/libboard_zynq/src/sdio/adma.rs
@@ -62,7 +62,7 @@ impl Adma2Desc32 {
     }
 }
 
-pub fn setup_adma2_descr32(sdio: &mut SDIO, blk_cnt: u32, buffer: &mut [u8]) {
+pub fn setup_adma2_descr32(sdio: &mut SDIO, blk_cnt: u32, buffer: &[u8]) {
     let descr_table = unsafe { &mut ADMA2_DESCR32_TABLE };
     let blk_size = sdio
         .regs
diff --git a/libboard_zynq/src/sdio/sd_card.rs b/libboard_zynq/src/sdio/sd_card.rs
index a58f605..0826574 100644
--- a/libboard_zynq/src/sdio/sd_card.rs
+++ b/libboard_zynq/src/sdio/sd_card.rs
@@ -241,7 +241,7 @@ impl SdCard {
         &mut self,
         address: u32,
         block_cnt: u16,
-        buffer: &mut [u8],
+        buffer: &[u8],
     ) -> Result<(), CmdTransferError> {
         assert!(buffer.len() >= (block_cnt as usize) * 512);
         // set block size if not set already
diff --git a/libcortex_a9/src/cache.rs b/libcortex_a9/src/cache.rs
index f62d88f..c4d26a1 100644
--- a/libcortex_a9/src/cache.rs
+++ b/libcortex_a9/src/cache.rs
@@ -112,7 +112,7 @@ pub fn dcci<T>(object: &T) {
     }
 }
 
-pub fn dcci_slice<T>(slice: &mut [T]) {
+pub fn dcci_slice<T>(slice: &[T]) {
     for addr in slice_cache_line_addrs(slice) {
         dccimvac(addr);
     }