Add riscv64 support

Co-authored-by: Martin Kröning <[email protected]>
Signed-off-by: Martin Kröning <[email protected]>

benches/micro/Cargo.toml

@@ -16,6 +16,9 @@ default-features = false
 aarch64 = { version = "0.0.10", default-features = false }
 tock-registers = "0.8"
 
+[target.'cfg(target_arch = "riscv64")'.dependencies]
+riscv = "0.10"
+
 [target.'cfg(target_os = "linux")'.dependencies]
 syscalls = { version = "0.6", default-features = false }
 

benches/micro/src/benches/mod.rs

@@ -37,6 +37,12 @@ fn get_timestamp() -> u64 {
 	aarch64::regs::CNTPCT_EL0.get()
 }
 
+#[cfg(target_arch = "riscv64")]
+#[inline]
+fn get_timestamp() -> u64 {
+	riscv::register::time::read64()
+}
+
 extern "C" {
 	#[cfg(target_os = "hermit")]
 	fn sys_getpid() -> u32;