From: acevest <zhaoyanbai@126.com>
Date: Sun, 7 Nov 2021 08:38:59 +0000 (+0800)
Subject: fix 在内核初始化阶段按键盘导致后续无法触发键盘中断的问题
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/doxygen.png?a=commitdiff_plain;h=25ba3cffc8f8252699ad7f5f2075d177c3473f8c;p=kernel.git

fix 在内核初始化阶段按键盘导致后续无法触发键盘中断的问题
---

diff --git a/kernel/init.c b/kernel/init.c
index 2dd393d..073c542 100644
--- a/kernel/init.c
+++ b/kernel/init.c
@@ -145,9 +145,16 @@ void kernel_task(char *name, void *entry) {
     printk("kernel[%s] task pid is %d\n", name, pid);
 }
 
+// 从multiboot.S进入这里
 void root_task_entry() {
     sti();
 
+    // 有一点点垃圾事情需要处理
+    // 之前内核初始化都是在关中断下进行的
+    // 这就段时间有可能按键盘，然而键盘不把数据读出来就不会触发下一次中断
+    // 所以得先清空一下键盘
+    inb(0x60);
+
     kernel_task("init", init_task_entry);
     kernel_task("test", init_task_entry);
     kernel_task("user", user_task_entry);
diff --git a/kernel/sched.c b/kernel/sched.c
index fd0bb48..43e3432 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -79,12 +79,16 @@ void setup_tasks() {
     init_root_tsk();
 
     task_union_cache = kmem_cache_create("task_union", sizeof(task_union), PAGE_SIZE);
-    if (0 == task_union_cache) panic("setup tasks failed. out of memory");
+    if (0 == task_union_cache) {
+        panic("setup tasks failed. out of memory");
+    }
 }
 
-task_union *alloc_task_union() { return (task_union *)kmem_cache_alloc(task_union_cache, 0); }
-
-inline task_union *get_next_tsk() { return 0; }
+task_union *alloc_task_union() {
+    task_union *task;
+    task = (task_union *)kmem_cache_alloc(task_union_cache, 0);
+    return task;
+}
 
 void switch_to() {
     LoadCR3(current->cr3);