add htif read function for rocket-chip

kernel/src/arch/riscv32/mod.rs

@@ -48,13 +48,6 @@ pub extern "C" fn rust_main(hartid: usize, device_tree_paddr: usize) -> ! {
         hartid, device_tree_vaddr
     );
 
-    //while true {
-        //let fuck_char = get_char_fuck();
-        //if fuck_char as u8 != 254 {
-            //print!("{0}", fuck_char as char);
-        //}
-    //}
-
     crate::logging::init();
     interrupt::init();
     memory::init(device_tree_vaddr);

kernel/src/fs/stdio.rs

@@ -28,7 +28,14 @@ impl Stdin {
                 return c;
             }
         }
-        #[cfg(not(feature = "board_k210"))]
+        #[cfg(feature = "board_rocket_chip")]
+        loop {
+            let c = crate::arch::io::getchar();
+            if c != '\0' && c as u8 != 254 {
+                return c;
+            }
+        }
+        #[cfg(not(any(feature = "board_k210", feature = "board_rocket_chip")))]
         loop {
             let ret = self.buf.lock().pop_front();
             match ret {
@@ -38,7 +45,12 @@ impl Stdin {
         }
     }
     pub fn can_read(&self) -> bool {
-        self.buf.lock().len() > 0
+        // Currently, rocket-chip implementation rely on htif interface, the serial interrupt DO
+        // NOT work, so return true always
+        #[cfg(feature = "board_rocket_chip")]
+        return true;
+        #[cfg(not(feature = "board_rocket_chip"))]
+        return self.buf.lock().len() > 0;
     }
 }
 

kernel/src/shell.rs

@@ -5,6 +5,7 @@ use crate::fs::{INodeExt, ROOT_INODE};
 use crate::process::*;
 use alloc::string::String;
 use alloc::vec::Vec;
+use crate::arch::io;
 
 #[cfg(not(feature = "run_cmdline"))]
 pub fn add_user_shell() {
@@ -31,10 +32,12 @@ pub fn add_user_shell() {
     let init_args = vec!["busybox".into(), "ash".into()];
 
     if let Ok(inode) = ROOT_INODE.lookup(init_shell) {
+        println!("use fucking up busybox");
         processor()
             .manager()
             .add(Thread::new_user(&inode, init_shell, init_args, init_envs));
     } else {
+        println!("not use fucking up busybox, but shell");
         processor().manager().add(Thread::new_kernel(shell, 0));
     }
 }
@@ -46,9 +49,9 @@ pub fn add_user_shell() {
     println!("not use the fucking up busybox");
     processor().manager().add(Thread::new_user(
         &inode,
+        "/busybox",
         cmdline.split(' ').map(|s| s.into()).collect(),
         Vec::new(),
-        Vec::new(),
     ));
 }