remove more mut (#334)

src/device.rs

@@ -348,7 +348,7 @@ impl Device {
                 },
             },
             memory: memory::Memory {
-                fast_read: [unmapped::read_mem; 0x2000],
+                fast_read: [unmapped::read_mem_fast; 0x2000],
                 memory_map_read: [unmapped::read_mem; 0x2000],
                 memory_map_write: [unmapped::write_mem; 0x2000],
                 icache: [cache::ICache {

src/device/cart/rom.rs

@@ -24,7 +24,7 @@ fn read_cart_word(device: &device::Device, address: usize) -> u32 {
 }
 
 pub fn read_mem_fast(
-    device: &mut device::Device,
+    device: &device::Device,
     address: u64,
     _access_size: device::memory::AccessSize,
 ) -> u32 {

src/device/memory.rs

@@ -40,8 +40,8 @@ pub enum AccessSize {
 
 #[derive(serde::Serialize, serde::Deserialize)]
 pub struct Memory {
-    #[serde(skip, default = "savestates::default_memory_read")]
-    pub fast_read: [fn(&mut device::Device, u64, AccessSize) -> u32; 0x2000], // fast_read is used for lookups that try to detect idle loops
+    #[serde(skip, default = "savestates::default_memory_read_fast")]
+    pub fast_read: [fn(&device::Device, u64, AccessSize) -> u32; 0x2000], // fast_read is used for lookups that try to detect idle loops
     #[serde(skip, default = "savestates::default_memory_read")]
     pub memory_map_read: [fn(&mut device::Device, u64, AccessSize) -> u32; 0x2000],
     #[serde(skip, default = "savestates::default_memory_write")]

src/device/rdram.rs

@@ -24,7 +24,7 @@ pub struct Rdram {
 }
 
 pub fn read_mem_fast(
-    device: &mut device::Device,
+    device: &device::Device,
     address: u64,
     _access_size: device::memory::AccessSize,
 ) -> u32 {

src/device/rsp_interface.rs

@@ -89,7 +89,7 @@ pub struct Rsp {
 }
 
 pub fn read_mem_fast(
-    device: &mut device::Device,
+    device: &device::Device,
     address: u64,
     _access_size: device::memory::AccessSize,
 ) -> u32 {

src/device/unmapped.rs

@@ -1,7 +1,7 @@
 use crate::device;
 
-pub fn read_mem(
-    _device: &mut device::Device,
+pub fn read_mem_fast(
+    _device: &device::Device,
     address: u64,
     _access_size: device::memory::AccessSize,
 ) -> u32 {
@@ -9,4 +9,12 @@ pub fn read_mem(
     value | (value << 16)
 }
 
+pub fn read_mem(
+    device: &mut device::Device,
+    address: u64,
+    access_size: device::memory::AccessSize,
+) -> u32 {
+    read_mem_fast(device, address, access_size)
+}
+
 pub fn write_mem(_device: &mut device::Device, _address: u64, _value: u32, _mask: u32) {}

src/savestates.rs

@@ -216,6 +216,11 @@ where
     [device::cop0::reserved; N]
 }
 
+pub fn default_memory_read_fast()
+-> [fn(&device::Device, u64, device::memory::AccessSize) -> u32; 0x2000] {
+    [device::rdram::read_mem_fast; 0x2000]
+}
+
 pub fn default_memory_read()
 -> [fn(&mut device::Device, u64, device::memory::AccessSize) -> u32; 0x2000] {
     [device::rdram::read_mem; 0x2000]