Patch sched rust (#139)

* update

* 添加rt调度器的rust初步实现

* 完善rt调度逻辑

* 调试rt调度器

* 修改sched的返回值

* cargo fmt 格式化

* 删除无用代码，修补rt bug

* 删除无用的代码，和重复的逻辑

* 软中断bugfix

* 删除一些代码

* 添加kthread_run_rt文档

* 解决sphinix警告_static目录不存在的问题

Co-authored-by: longjin <longjin@RinGoTek.cn>

kernel/src/arch/x86_64/asm/bitops.rs

@@ -2,7 +2,7 @@ use core::arch::x86_64::_popcnt64;
 
 /// @brief ffz - 寻找u64中的第一个0所在的位（从第0位开始寻找）
 /// 请注意，如果x中没有0,那么结果将是未定义的。请确保传入的x至少存在1个0
-/// 
+///
 /// @param x 目标u64
 /// @return i32 bit-number(0..63) of the first (least significant) zero bit.
 #[inline]

kernel/src/arch/x86_64/asm/mod.rs

@@ -1,6 +1,6 @@
 pub mod irqflags;
 #[macro_use]
 pub mod current;
-pub mod ptrace;
 pub mod bitops;
-pub mod cmpxchg;
+pub mod cmpxchg;
+pub mod ptrace;

kernel/src/arch/x86_64/asm/ptrace.rs

@@ -3,10 +3,10 @@ use crate::include::bindings::bindings::pt_regs;
 
 /// @brief 判断给定的栈帧是否来自用户态
 /// 判断方法为：根据代码段选择子是否具有ring3的访问权限（低2bit均为1）
-pub fn user_mode(regs: *const pt_regs)->bool{
-    if (unsafe{(*regs).cs} & 0x3) != 0{
+pub fn user_mode(regs: *const pt_regs) -> bool {
+    if (unsafe { (*regs).cs } & 0x3) != 0 {
         return true;
-    }else {
+    } else {
         return false;
     }
-}
+}

kernel/src/arch/x86_64/interrupt/mod.rs

@@ -3,16 +3,16 @@ use core::arch::asm;
 
 /// @brief 关闭中断
 #[inline]
-pub fn cli(){
-    unsafe{
+pub fn cli() {
+    unsafe {
         asm!("cli");
     }
 }
 
 /// @brief 开启中断
 #[inline]
-pub fn sti(){
-    unsafe{
+pub fn sti() {
+    unsafe {
         asm!("sti");
     }
-}
+}

kernel/src/arch/x86_64/mm/barrier.rs

@@ -2,22 +2,22 @@
 use core::arch::asm;
 
 #[inline(always)]
-pub fn mfence(){
-    unsafe{
+pub fn mfence() {
+    unsafe {
         asm!("mfence");
     }
 }
 
 #[inline(always)]
-pub fn lfence(){
-    unsafe{
+pub fn lfence() {
+    unsafe {
         asm!("lfence");
     }
 }
 
 #[inline(always)]
-pub fn sfence(){
-    unsafe{
+pub fn sfence() {
+    unsafe {
         asm!("sfence");
     }
-}
+}

kernel/src/arch/x86_64/mm/mod.rs

@@ -19,7 +19,7 @@ pub fn switch_mm(
     mfence();
     // kdebug!("to get pml4t");
     let pml4t = unsafe { read_volatile(&next_pcb.mm.as_ref().unwrap().pgd) };
-    
+
     unsafe {
         asm!("mov cr3, {}", in(reg) pml4t);
     }

kernel/src/arch/x86_64/mod.rs

@@ -1,7 +1,7 @@
 #[macro_use]
 pub mod asm;
+pub mod context;
 pub mod cpu;
 pub mod interrupt;
 pub mod mm;
-pub mod context;
-pub mod sched;
+pub mod sched;