Add registers in rust

.gitignore

@@ -6,7 +6,12 @@ mill*
 bench/mem
 .metals
 .bloop
-.rpt
+*.rpt
-.Xil
+*.jou
+*.log
+*.mmi
+*.Xil
 clockInfo.txt
-.csv
+*.csv
+*.bit
+*.dcp

Makefile

@@ -61,7 +61,8 @@ TEST_MAX_PROCS := $$(($$(nproc) - 2)) ## Garde un processeur libre
 
 .PRECIOUS: $(MEM_DIR)/%.elf
 
-.PHONY: synthese fpga clean compile autotest simulation
+.PHONY: synthese fpga clean compile autotest simulation force
+force:
 	
 compile: $(MEM)
 $(MEM_DIR):
@@ -69,7 +70,7 @@ $(MEM_DIR):
 	@mkdir -p $@/programs
 	@mkdir -p $@/programs_rust
 
-$(MEM_DIR)/programs_rust/%.elf: bench/programs_rust/% |$(MEM_DIR)
+$(MEM_DIR)/programs_rust/%.elf: bench/programs_rust/% force |$(MEM_DIR)
 	cd bench/programs_rust && cargo build --release --bin=$(basename $(notdir $@))
 	cp -f bench/programs_rust/target/riscv64i/release/$(basename $(notdir $@)) $@
 $(MEM_DIR)/crt.o: $(BENCH_DIR)/crt.S |$(MEM_DIR)

bench/programs_rust/Cargo.toml

@@ -1,6 +1,6 @@
 [workspace]
 resolver = "3"
-members = ["fpga_lib", "hello_rust"]
+members = ["fpga-lib", "fpga-lib-macros", "hello-rust"]
 
 [profile.release]
 panic = "abort"

bench/programs_rust/fpga-lib-macros/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "fpga-lib-macros"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1.0"
+quote = "1.0"
+syn = { version = "2.0", features = ["full"] }

bench/programs_rust/fpga-lib-macros/src/lib.rs

@@ -0,0 +1,34 @@
+extern crate proc_macro;
+use proc_macro::TokenStream;
+use quote::{format_ident, quote};
+
+#[proc_macro]
+pub fn define_regs(_input: TokenStream) -> TokenStream {
+    let mut tokens = proc_macro2::TokenStream::new();
+
+    for n in 0..32usize {
+        let load = format!("li x{}, {{}}", n);
+        let store = format!("mv {{}}, x{}", n);
+        let ident = format_ident!("X{}", n);
+        let t = quote! {
+            impl Reg<#n> {
+                pub fn write_const<const X: u64>() {
+                    unsafe {
+                        core::arch::asm!(#load, const X)
+                    }
+                }
+                pub fn read() -> u64 {
+                    let out: u64;
+                    unsafe {
+                        core::arch::asm!(#store, out(reg) out)
+                    }
+                    out
+                }
+            }
+            pub type #ident = Reg<#n>;
+        };
+        tokens.extend(t);
+    }
+
+    tokens.into()
+}

bench/programs_rust/fpga-lib/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "fpga-lib"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+fpga-lib-macros = { path = "../fpga-lib-macros" }

bench/programs_rust/fpga-lib/src/lib.rs

@@ -1,5 +1,7 @@
 #![no_std]
 
+pub mod register;
+
 #[macro_export]
 macro_rules! panic_handler {
     () => {

bench/programs_rust/fpga-lib/src/register.rs

@@ -0,0 +1,3 @@
+pub struct Reg<const N: usize> {}
+
+fpga_lib_macros::define_regs! {}

bench/programs_rust/hello-rust/Cargo.toml

@@ -1,6 +1,7 @@
 [package]
-name = "fpga_lib"
+name = "hello-rust"
 version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+fpga-lib = { path = "../fpga-lib" }

bench/programs_rust/hello-rust/src/main.rs

@@ -0,0 +1,26 @@
+#![no_std]
+#![no_main]
+
+use core::arch::asm;
+
+use fpga_lib::{panic_handler, register::X31};
+
+panic_handler! {}
+
+#[unsafe(no_mangle)]
+pub extern "C" fn _start() -> ! {
+    X31::write_const::<0xdead1ffffffff>();
+    let test = X31::read() + 10;
+    unsafe {
+        asm!(
+            "add x31, x0, x0",
+            "add x31, x0, {}", in(reg) test
+        );
+
+        const VGA: *mut u8 = 0x80000000 as *mut u8;
+        VGA.write_volatile(255);
+        // VGA.add(1).write_volatile(255);
+    }
+
+    loop {}
+}

bench/programs_rust/hello_rust/Cargo.toml

@@ -1,7 +0,0 @@
-[package]
-name = "hello_rust"
-version = "0.1.0"
-edition = "2024"
-
-[dependencies]
-fpga_lib = { path = "../fpga_lib" }

bench/programs_rust/hello_rust/src/main.rs

@@ -1,18 +0,0 @@
-#![no_std]
-#![no_main]
-
-use core::arch::asm;
-
-use fpga_lib::panic_handler;
-
-panic_handler! {}
-
-#[unsafe(no_mangle)]
-pub extern "C" fn _start() -> ! {
-    unsafe {
-        asm! {
-            "li x31, 0xdead0"
-        }
-    }
-    loop {}
-}