Merge branch 'feat_inital_context_switching' into 'develop_ba'

Implement Context Switching

See merge request teachos/kernel!6

2 files changed, 9 insertions, 4 deletions

diff --git a/arch/x86_64/src/memory/paging/page_entry.cpp b/arch/x86_64/src/memory/paging/page_entry.cpp
index 5aa0982..57045ca 100644
--- a/arch/x86_64/src/memory/paging/page_entry.cpp
+++ b/arch/x86_64/src/memory/paging/page_entry.cpp
@@ -21,10 +21,12 @@ namespace teachos::arch::memory::paging
     {
       flags |= entry::PRESENT;
     }
+
     if (elf_flags.contains_flags(multiboot::elf_section_flags::WRITABLE))
     {
       flags |= entry::WRITABLE;
     }
+
     if (!elf_flags.contains_flags(multiboot::elf_section_flags::EXECUTABLE_CODE))
     {
       flags |= entry::EXECUTING_CODE_FORBIDDEN;
@@ -35,6 +37,8 @@ namespace teachos::arch::memory::paging
 
   auto entry::set_unused() -> void { flags = 0U; }
 
+  auto entry::set_user_accessible() -> void { flags |= entry::USER_ACCESSIBLE; }
+
   auto entry::calculate_pointed_to_frame() const -> std::optional<allocator::physical_frame>
   {
     if (contains_flags(PRESENT))
@@ -51,6 +55,7 @@ namespace teachos::arch::memory::paging
   {
     exception_handling::assert((frame.start_address() & ~PHYSICAL_ADDRESS_MASK) == 0,
                                "[Paging Entry] Start address is not aligned with page");
+
     flags = frame.start_address() | additional_flags.to_ulong();
   }
 
diff --git a/arch/x86_64/src/memory/paging/temporary_page.cpp b/arch/x86_64/src/memory/paging/temporary_page.cpp
index 152241d..8e73523 100644
--- a/arch/x86_64/src/memory/paging/temporary_page.cpp
+++ b/arch/x86_64/src/memory/paging/temporary_page.cpp
@@ -4,16 +4,16 @@
 
 namespace teachos::arch::memory::paging
 {
-  auto temporary_page::map_table_frame(allocator::physical_frame frame,
-                                       active_page_table & active_table) -> page_table_handle
+  auto temporary_page::map_table_frame(allocator::physical_frame frame, active_page_table & active_table)
+      -> page_table_handle
   {
     page_table_handle handle{reinterpret_cast<page_table *>(map_to_frame(frame, active_table)),
                              page_table_handle::LEVEL1};
     return handle;
   }
 
-  auto temporary_page::map_to_frame(allocator::physical_frame frame,
-                                    active_page_table & active_table) -> virtual_address
+  auto temporary_page::map_to_frame(allocator::physical_frame frame, active_page_table & active_table)
+      -> virtual_address
   {
     exception_handling::assert(!active_table.translate_page(page).has_value(),
                                "[Temporary page] Page is already mapped");