添加sbi-rt库, 时钟中断设置这里,这个书里是错的也没写出来sbi_call已经不能用了, 需要用sbi-rt这个设置时钟中断

ch3/os/Cargo.toml

@@ -12,3 +12,4 @@ debug=true
 [dependencies]
 riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"] }
 lazy_static = { version = "1.4.0", features = ["spin_no_std"] }
+sbi-rt = { version = "0.0.2", features = ["legacy"] }

ch3/os/src/sbi.rs

@@ -41,5 +41,5 @@ pub fn shutdown() -> ! {
 
 // 设置 mtimecmp 的值
 pub fn set_timer(timer: usize) {
-    sbi_call(SBI_SET_TIMER, timer, 0, 0, 0);
+    sbi_rt::set_timer(timer as _);
 }

ch3/os/src/trap/mod.rs

@@ -56,7 +56,6 @@ pub fn trap_handler(trap_context: &mut TrapContext) -> &mut TrapContext {
             exit_current_and_run_next();
         }
         Trap::Interrupt(Interrupt::SupervisorTimer) => {
-            println!("Clock interrupt Clock interrupt Clock interrupt Clock interrupt");
             // 发生时钟中断之后, 继续设置下一个时钟中断的发起时间
             set_next_trigger();
             // 暂停当前任务, 切换新的任务