finish defining simple text output protocol

src/os_loader.rs

@@ -11,13 +11,14 @@ pub mod simple_text_output;
 use core::panic::PanicInfo;
 use system_table::SystemTable;
 use types::Handle;
+use simple_text_output::SimpleTextOutputProtocol;
 
 #[no_mangle]
 #[export_name = "efi_main"]
 extern "efiapi" fn efi_main(image_handle: Handle, system_table: *mut SystemTable) -> usize {
     unsafe {
         let system_table_ref: &SystemTable = &*system_table;
-        let console_out: *mut structs::SimpleTextOutputProtocol = system_table_ref.console_out;
+        let console_out: *mut SimpleTextOutputProtocol = system_table_ref.console_out;
     }
     loop {};
     0 // EFI_SUCCESS

src/simple_text_output.rs

@@ -2,7 +2,18 @@ use crate::structs::Status;
 use crate::types::Char16;
 
 #[repr(C)]
-pub struct SimpleTextOutputProtocol {}
+pub struct SimpleTextOutputProtocol {
+    reset: text_reset,
+    output_string: text_string,
+    test_string: text_test_string,
+    query_mode: text_query_mode,
+    set_mode: text_set_mode,
+    set_attribute: text_set_attribute,
+    clear_screen: text_clear_screen,
+    set_cursor_position: text_set_cursor_position,
+    enable_cursor: text_enable_cursor,
+    mode: *mut SimpleTextOutputMode,
+}
 
 pub type text_reset =
     extern "efiapi" fn(this: &SimpleTextOutputProtocol, extended_verification: bool) -> Status;
@@ -20,7 +31,11 @@ pub type text_set_mode =
     extern "efiapi" fn(this: &SimpleTextOutputProtocol, mode_number: usize) -> Status;
 pub type text_set_attribute =
     extern "efiapi" fn(this: &SimpleTextOutputProtocol, Attribute: usize) -> Status;
-
+pub type text_clear_screen = extern "efiapi" fn(this: SimpleTextOutputProtocol) -> Status;
+pub type text_set_cursor_position =
+    extern "efiapi" fn(this: &SimpleTextOutputProtocol, column: usize, row: usize) -> Status;
+pub type text_enable_cursor =
+    extern "efiapi" fn(this: &SimpleTextOutputProtocol, visible: bool) -> Status;
 
 #[repr(C)]
 pub enum Attribute {
@@ -50,3 +65,13 @@ pub enum Attribute {
     BackgroundBrown = 0x60,
     BackgroundLightGray = 0x70,
 }
+
+#[repr(C)]
+pub struct SimpleTextOutputMode {
+    max_mode: i32,
+    mode: i32,
+    attribute: i32,
+    cursor_column: i32,
+    cursor_row: i32,
+    cursor_visible: bool,
+}

src/system_table.rs

@@ -1,6 +1,7 @@
 use crate::boot_services::BootServicesTable;
 use crate::structs::*;
 use crate::types::Handle;
+use crate::simple_text_output::SimpleTextOutputProtocol;
 
 #[repr(C)]
 pub struct SystemTable {