feat: map text area to kernel memory space, first application_manager

implementation

src/application_manager.rs

@@ -0,0 +1,44 @@
+use alloc::vec::Vec;
+
+use crate::{
+    aarch64::mmu::{
+        find_free_kerne_page_in_block, map_page, physical_mapping::reserve_page, TableEntry,
+        NORMAL_MEM, TRANSLATIONTABLE_TTBR1, WRITABLE,
+    },
+    configuration::memory_mapping::APPLICATION_TRANSLATION_TABLE_VA,
+};
+pub struct Application {
+    pub table_ptr: *mut TableEntry,
+}
+
+impl Default for Application {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl Application {
+    pub fn new() -> Self {
+        let physical_addr = reserve_page();
+        let virtual_address =
+            find_free_kerne_page_in_block(APPLICATION_TRANSLATION_TABLE_VA).unwrap();
+
+        map_page(
+            virtual_address,
+            physical_addr,
+            core::ptr::addr_of_mut!(TRANSLATIONTABLE_TTBR1),
+            NORMAL_MEM | WRITABLE,
+        )
+        .unwrap();
+
+        Self {
+            table_ptr: physical_addr as *mut TableEntry,
+        }
+    }
+}
+
+pub static mut APPLICATION_LIST: Option<Vec<Application>> = None;
+
+pub fn initialize_app_manager() {
+    unsafe { APPLICATION_LIST = Some(Vec::new()) }
+}