🆕 键盘驱动上半部

kernel/Makefile

@@ -20,10 +20,10 @@ all: kernel
 # cp kernel ../bin/kernel/kernel.elf
 
 
-kernel: head.o entry.o main.o printk.o trap.o mm.o slab.o irq.o pic.o process.o syscall.o multiboot2.o cpu.o acpi.o
+kernel: head.o entry.o main.o printk.o trap.o mm.o slab.o irq.o pic.o process.o syscall.o multiboot2.o cpu.o acpi.o keyboard.o
 	ld -b elf64-x86-64 -z muldefs -o kernel head.o exception/entry.o main.o common/printk.o exception/trap.o exception/irq.o mm/mm.o mm/slab.o process/process.o syscall/syscall.o driver/multiboot2/multiboot2.o \
 	common/cpu.o	\
-	driver/acpi/acpi.o driver/interrupt/pic.o 	\
+	driver/acpi/acpi.o driver/interrupt/pic.o driver/keyboard/keyboard.o \
 	-T link.lds
 
 head.o: head.S
@@ -86,5 +86,8 @@ multiboot2.o: driver/multiboot2/multiboot2.c
 acpi.o: driver/acpi/acpi.c 
 	gcc $(CFLAGS) -c driver/acpi/acpi.c  -o driver/acpi/acpi.o
 
+keyboard.o: driver/keyboard/keyboard.c
+	gcc $(CFLAGS) -c driver/keyboard/keyboard.c  -o driver/keyboard/keyboard.o
+
 clean: 
 	rm -rf $(GARBAGE)

kernel/driver/interrupt/apic/apic.c

@@ -291,13 +291,14 @@ void do_IRQ(struct pt_regs *rsp, ul number)
 {
 
     unsigned char x = io_in8(0x60);
-    printk_color(BLUE, WHITE, "(IRQ:%#04x)\tkey code:%#04x\n", number, x);
 
     irq_desc_t *irq = &interrupt_desc[number - 32];
 
     // 执行中断上半部处理程序
     if (irq->handler != NULL)
         irq->handler(number, irq->parameter, rsp);
+    else
+        kwarn("Intr vector [%d] does not have a handler!");
 
     // 向中断控制器发送应答消息
     if (irq->controller != NULL && irq->controller->ack != NULL)
@@ -316,7 +317,7 @@ void do_IRQ(struct pt_regs *rsp, ul number)
  * @param index 索引值
  * @return ul
  */
-ul apic_read_ioapic_rte(unsigned char index)
+ul apic_ioapic_read_rte(unsigned char index)
 {
     // 由于处理器的乱序执行的问题，需要加入内存屏障以保证结果的正确性。
     ul ret;

kernel/driver/interrupt/apic/apic.h

@@ -212,7 +212,7 @@ struct apic_IO_APIC_RTE_entry
 #define ICR_ALL_INCLUDE_Self 2
 #define ICR_ALL_EXCLUDE_Self 3
 
-// 目标模式
+// 投递目标模式
 #define DEST_PHYSICAL 0 // 物理模式
 #define DEST_LOGIC 1    // 逻辑模式
 
@@ -220,7 +220,7 @@ struct apic_IO_APIC_RTE_entry
 #define ICR_LEVEL_DE_ASSERT 0
 #define ICR_LEVEL_ASSERT 1
 
-// 远程IRR
+// 远程IRR标志位, 在处理Local APIC标志位时置位，在收到处理器发来的EOI命令时复位
 #define IRR_RESET 0
 #define IRR_ACCEPT 1
 

kernel/driver/keyboard/keyboard.c

@@ -0,0 +1,111 @@
+#include "keyboard.h"
+#include "../interrupt/apic/apic.h"
+#include "../../mm/mm.h"
+#include "../../mm/slab.h"
+#include "../../common/printk.h"
+
+static struct keyboard_input_buffer *kb_buf_ptr = NULL;
+static int shift_l, shift_r, ctrl_l, ctrl_r, alt_l, alt_r;
+struct apic_IO_APIC_RTE_entry entry;
+
+hardware_intr_controller keyboard_intr_controller =
+    {
+        .enable = apic_ioapic_enable,
+        .disable = apic_ioapic_disable,
+        .install = apic_ioapic_install,
+        .uninstall = apic_ioapic_uninstall,
+        .ack = apic_ioapic_edge_ack,
+
+};
+
+/**
+ * @brief 键盘中断处理函数（中断上半部）
+ *  将数据存入缓冲区
+ * @param irq_num 中断向量号
+ * @param param 参数
+ * @param regs 寄存器信息
+ */
+void keyboard_handler(ul irq_num, ul param, struct pt_regs *regs)
+{
+    // 读取键盘输入的信息
+    unsigned x = io_in8(0x60);
+    printk_color(ORANGE, BLACK, "key_pressed:%02x\n", x);
+
+    // 当头指针越过界时，恢复指向数组头部
+    if (kb_buf_ptr->ptr_head == kb_buf_ptr + keyboard_buffer_size)
+        kb_buf_ptr->ptr_head = kb_buf_ptr->buffer;
+
+    if (kb_buf_ptr->count >= keyboard_buffer_size)
+    {
+        kwarn("Keyboard input buffer is full.");
+        return;
+    }
+
+    *kb_buf_ptr->ptr_head = x;
+    ++(kb_buf_ptr->count);
+    ++(kb_buf_ptr->ptr_head);
+}
+/**
+ * @brief 初始化键盘驱动程序的函数
+ *
+ */
+void keyboard_init()
+{
+    // ======= 初始化键盘循环队列缓冲区 ===========
+
+    // 申请键盘循环队列缓冲区的内存
+    kb_buf_ptr = (struct keyboard_input_buffer *)kmalloc(sizeof(struct keyboard_input_buffer), 0);
+
+    kb_buf_ptr->ptr_head = kb_buf_ptr;
+    kb_buf_ptr->ptr_tail = kb_buf_ptr;
+    kb_buf_ptr->count = 0;
+
+    memset(kb_buf_ptr->buffer, 0, keyboard_buffer_size);
+
+    // ======== 初始化中断RTE entry ==========
+
+    entry.vector = 0x21;                // 设置中断向量号
+    entry.deliver_mode = IO_APIC_FIXED; // 投递模式：混合
+    entry.dest_mode = DEST_PHYSICAL;    // 物理模式投递中断
+    entry.deliver_status = IDLE;
+    entry.trigger_mode = EDGE_TRIGGER; // 设置边沿触发
+    entry.polarity = POLARITY_HIGH;    // 高电平触发
+    entry.remote_IRR = IRR_RESET;
+    entry.mask = MASKED;
+    entry.reserved = 0;
+
+    entry.destination.physical.reserved1 = 0;
+    entry.destination.physical.reserved2 = 0;
+    entry.destination.physical.phy_dest = 0; // 设置投递到BSP处理器
+
+    // ======== 初始化键盘控制器，写入配置值 =========
+    wait_keyboard_write();
+    io_out8(PORT_KEYBOARD_CONTROL, KEYBOARD_COMMAND_WRITE);
+    wait_keyboard_write();
+    io_out8(PORT_KEYBOARD_DATA, KEYBOARD_PARAM_INIT);
+    wait_keyboard_write();
+
+    // 执行一百万次nop，等待键盘控制器把命令执行完毕
+    for (int i = 0; i < 1000; ++i)
+        for (int j = 0; j < 1000; ++j)
+            nop();
+    shift_l = 0;
+    shift_r = 0;
+    ctrl_l = 0;
+    ctrl_r = 0;
+    alt_l = 0;
+    alt_r = 0;
+
+    // 注册中断处理程序
+    irq_register(0x21, &entry, &keyboard_handler, (ul)kb_buf_ptr, &keyboard_intr_controller, "ps/2 keyboard");
+}
+
+/**
+ * @brief 键盘驱动卸载函数
+ *
+ */
+void keyboard_exit()
+{
+    irq_unregister(0x21);
+    kfree((ul *)kb_buf_ptr);
+}

kernel/driver/keyboard/keyboard.h

@@ -0,0 +1,47 @@
+#pragma once
+
+#include "../../common/glib.h"
+
+// 定义键盘循环队列缓冲区大小为100bytes
+#define keyboard_buffer_size 100
+
+/**
+ * @brief 键盘循环队列缓冲区结构体
+ *
+ */
+struct keyboard_input_buffer
+{
+    unsigned char *ptr_head;
+    unsigned char *ptr_tail;
+    int count;
+    unsigned char buffer[keyboard_buffer_size];
+};
+
+#define PORT_KEYBOARD_DATA 0x60
+#define PORT_KEYBOARD_STATUS 0x64
+#define PORT_KEYBOARD_CONTROL 0x64
+
+#define KEYBOARD_COMMAND_WRITE 0x60 // 向键盘发送配置命令
+#define KEYBOARD_COMMAND_READ 0x20  // 读取键盘的配置值
+#define KEYBOARD_PARAM_INIT 0x47    // 初始化键盘控制器的配置值
+
+// ========= 检测键盘输入/输出缓冲区是否已满
+#define KEYBOARD_FLAG_OUTBUF_FULL 0x01 // 键盘的输出缓冲区已满标志位
+#define KEYBOARD_FLAG_INBUF_FULL 0x02  // 键盘的输入缓冲区已满标志位
+
+// 等待向键盘控制器写入信息完成
+#define wait_keyboard_write() while (io_in8(PORT_KEYBOARD_STATUS) & KEYBOARD_FLAG_INBUF_FULL)
+// 等待从键盘控制器读取信息完成
+#define wait_keyboard_read() while (io_in8(PORT_KEYBOARD_STATUS) & KEYBOARD_FLAG_OUTBUF_FULL)
+
+/**
+ * @brief 初始化键盘驱动程序的函数
+ * 
+ */
+void keyboard_init();
+
+/**
+ * @brief 键盘驱动卸载函数
+ * 
+ */
+void keyboard_exit();

kernel/exception/irq.c

@@ -122,7 +122,7 @@ void (*interrupt_table[24])(void) =
  * @param irq_name 中断名
  * @return int
  */
-int irq_register(ul irq_num, void *arg, void (*handler)(ul irq_num, ul parameter, struct pt_regs *regs), ul paramater, hardware_int_controller *controller, char *irq_name)
+int irq_register(ul irq_num, void *arg, void (*handler)(ul irq_num, ul parameter, struct pt_regs *regs), ul paramater, hardware_intr_controller *controller, char *irq_name)
 {
     // 由于为I/O APIC分配的中断向量号是从32开始的，因此要减去32才是对应的interrupt_desc的元素
     irq_desc_t *p = &interrupt_desc[irq_num - 32];

kernel/exception/irq.h

@@ -88,7 +88,7 @@ extern void do_IRQ(struct pt_regs *regs, ul number);
 
 */
 
-typedef struct hardware_int_type
+typedef struct hardware_intr_type
 {
     // 使能中断操作接口
     void (*enable)(ul irq_num);
@@ -101,12 +101,12 @@ typedef struct hardware_int_type
     void (*uninstall)(ul irq_num);
     // 应答中断操作接口
     void (*ack)(ul irq_num);
-} hardware_int_controller;
+} hardware_intr_controller;
 
 // 中断描述结构体
 typedef struct
 {
-    hardware_int_controller *controller;
+    hardware_intr_controller *controller;
     // 中断名
     char *irq_name;
     // 中断处理函数的参数
@@ -132,7 +132,7 @@ irq_desc_t interrupt_desc[IRQ_NUM] = {0};
  * @param irq_name 中断名
  * @return int 
  */
-int irq_register(ul irq_num, void *arg, void (*handler)(ul irq_num, ul parameter, struct pt_regs *regs), ul paramater, hardware_int_controller *controller, char *irq_name);
+int irq_register(ul irq_num, void *arg, void (*handler)(ul irq_num, ul parameter, struct pt_regs *regs), ul paramater, hardware_intr_controller *controller, char *irq_name);
 
 /**
  * @brief 中断注销函数

kernel/main.c

@@ -15,6 +15,7 @@
 
 #include "driver/multiboot2/multiboot2.h"
 #include "driver/acpi/acpi.h"
+#include "driver/keyboard/keyboard.h"
 
 unsigned int *FR_address = (unsigned int *)0xb8000; //帧缓存区的地址
 
@@ -159,8 +160,8 @@ void system_initialize()
     // 先初始化系统调用模块
     syscall_init();
 
-    //cpu_init();
-    
+    cpu_init();
+    keyboard_init();
     // test_slab();
     // test_mm();