From: acevest <zhaoyanbai@126.com>
Date: Mon, 29 May 2023 15:05:06 +0000 (+0800)
Subject: 添加硬盘和键盘的中断下半部逻辑处理
X-Git-Url: http://zhaoyanbai.com/repos/?a=commitdiff_plain;h=d2630e3ea28be5c0cc42924ab87bc650a2af0214;p=kernel.git

添加硬盘和键盘的中断下半部逻辑处理
---

diff --git a/drivers/ide.c b/drivers/ide.c
index 30fa230..edf0144 100644
--- a/drivers/ide.c
+++ b/drivers/ide.c
@@ -555,18 +555,17 @@ extern ide_pci_controller_t ide_pci_controller;
 
 volatile uint32_t disk_inter_cnt = 0;
 
-void ide_irq_handler(unsigned int irq, pt_regs_t *regs, void *devid) {
-    // printk("ide irq handler %d \n", irq);
+void ide_irq_bh_handler() {
+    disk_inter_cnt++;
+
+    // up里不会立即重新调度进程
+    up(&disk_intr_sem);
+}
 
+void ide_irq_handler(unsigned int irq, pt_regs_t *regs, void *devid) {
     // printk("ide irq %d handler pci status: 0x%02x\n", irq, ata_pci_bus_status());
 
-#if 1
-    disk_inter_cnt++;
-    up(&disk_intr_sem);
-#else
-    ide_pci_controller.done = 1;
-    wake_up(&ide_wait_queue_head);
-#endif
+    add_irq_bh_handler(ide_irq_bh_handler);
 }
 
 void ide_init() {
diff --git a/drivers/keyboard.c b/drivers/keyboard.c
index 4864bf3..a3b953b 100644
--- a/drivers/keyboard.c
+++ b/drivers/keyboard.c
@@ -27,12 +27,10 @@ void poweroff();
 void ide_debug();
 void ide_status();
 void debug_sched();
-void vga_dbg_toggle();
+
 int debug_wait_queue_put(unsigned int v);
-// void ide_dma_pci_lba48();
-void vga_switch(unsigned int nr);
 
-void kbd_debug(unsigned char scan_code);
+void kbd_debug(uint8_t scan_code);
 
 char kbd_char_tbl[] = {
     0,   0,   '1', '2', '3', '4', '5',  '6', '7', '8', '9', '0', '-', '=', '\b', 0,   'q', 'w', 'e',  'r', 't', 'y',
@@ -54,28 +52,28 @@ char kbd_char_tbl[] = {
     0,   0,   0,   0,   0,   0,   0,    0,   0,   0,   0,   0,   0,   0,
 };
 
-void kbd_handler(unsigned int irq, pt_regs_t *regs, void *dev_id) {
-    unsigned char scan_code;
-
-    scan_code = inb(0x60);
-
+// TODO 改造成环形缓冲区
+uint8_t scan_code;
+void kbd_bh_handler() {
     kbd_debug(scan_code);
-
-    if (0x80 & scan_code)  // break code
-    {
+    if (0x80 & scan_code) {  // break code
         return;
     }
-
-    unsigned int inx = scan_code & 0xFF;
+    uint8_t inx = scan_code & 0xFF;
     char ch = kbd_char_tbl[inx];
     cnsl_kbd_write(ch);
 }
 
+void kbd_handler(unsigned int irq, pt_regs_t *regs, void *dev_id) {
+    scan_code = inb(0x60);
+    add_irq_bh_handler(kbd_bh_handler);
+}
+
 extern tty_t default_tty;
 extern tty_t monitor_tty;
 extern tty_t debug_tty;
 
-void kbd_debug(unsigned char scan_code) {
+void kbd_debug(uint8_t scan_code) {
     static unsigned long kbd_cnt = 0;
     printl(MPL_KEYBOARD, "keyboard irq: %d scan code %02x", kbd_cnt++, scan_code);
 
diff --git a/include/semaphore.h b/include/semaphore.h
index 7d0c139..72f6a52 100644
--- a/include/semaphore.h
+++ b/include/semaphore.h
@@ -23,9 +23,15 @@ typedef struct semaphore {
 
 void semaphore_init(semaphore_t *s, unsigned int v);
 
+// down
+// 如果s->cnt > 0不会立即重新调度进程
+// 如果s->cnt == 0 会重新调度进程
 void down(semaphore_t *s);
+
+// up
+// 只会唤醒进程，但不会立即重新调度进程
 void up(semaphore_t *s);
 
 #define DECLARE_MUTEX(name) semaphore_t name = SEMAPHORE_INITIALIZER(name, 1)
 void mutex_lock(semaphore_t *);
-void mutex_unlock(semaphore_t *);
\ No newline at end of file
+void mutex_unlock(semaphore_t *);
diff --git a/kernel/semaphore.c b/kernel/semaphore.c
index 36c8484..29b42ad 100644
--- a/kernel/semaphore.c
+++ b/kernel/semaphore.c
@@ -78,4 +78,4 @@ volatile void up(semaphore_t *s) {
 }
 
 void mutex_lock(semaphore_t *s) { down(s); }
-void mutex_unlock(semaphore_t *s) { up(s); }
\ No newline at end of file
+void mutex_unlock(semaphore_t *s) { up(s); }