磁盘请求在处理时，切换进程

kernel/syscall/syscall.c

@@ -2,6 +2,7 @@
 #include "../process/process.h"
 #include <exception/gate.h>
 #include <exception/irq.h>
+#include<driver/disk/ahci/ahci.h>
 
 // 导出系统调用入口函数，定义在entry.S中
 extern void system_call(void);
@@ -85,6 +86,12 @@ ul sys_printf(struct pt_regs *regs)
     return 0;
 }
 
+ul sys_ahci_end_req(struct pt_regs *regs)
+{
+    ahci_end_request();
+    return 0;
+}
+
 // 系统调用的内核入口程序
 void do_syscall_int(struct pt_regs *regs, unsigned long error_code)
 {

kernel/syscall/syscall.h

@@ -5,7 +5,7 @@
 #include "../process/ptrace.h"
 
 // 定义最大系统调用数量
-#define MAX_SYSTEM_CALL_NUM 128
+#define MAX_SYSTEM_CALL_NUM 256
 
 #define ESYSCALL_NOT_EXISTS 1
 
@@ -53,6 +53,8 @@ ul system_call_not_exists(struct pt_regs *regs)
  */
 ul sys_printf(struct pt_regs *regs);
 
+ul sys_ahci_end_req(struct pt_regs *regs);
+
 // 系统调用的内核入口程序
 void do_syscall_int(struct pt_regs *regs, unsigned long error_code);
 
@@ -60,4 +62,5 @@ system_call_t system_call_table[MAX_SYSTEM_CALL_NUM] =
     {
         [0] = system_call_not_exists,
         [1] = sys_printf,
-        [2 ... MAX_SYSTEM_CALL_NUM - 1] = system_call_not_exists};
+        [2 ... 254] = system_call_not_exists,
+        [255] = sys_ahci_end_req};

kernel/syscall/syscall_num.h

@@ -1,4 +1,15 @@
 #pragma once
 
+/**
+ * 系统调用说明
+ * 1    printf
+ * 
+ * 
+ * 255  AHCI end_request
+ * 
+ */
+
 #define SYS_NOT_EXISTS 0
-#define SYS_PRINTF 1
+#define SYS_PRINTF 1
+
+#define SYS_AHCI_END_REQ 255