Merge branch 'develop-BA-FS26' into 'develop'HEADdevelop

Merge of BA-FS26 branch into develop

See merge request teachos/kernel!49

1 files changed, 0 insertions, 66 deletions

diff --git a/arch/x86_64/pre/src/context_switching/main.cpp b/arch/x86_64/pre/src/context_switching/main.cpp
deleted file mode 100644
index 3eb6dae..0000000
--- a/arch/x86_64/pre/src/context_switching/main.cpp
+++ /dev/null
@@ -1,66 +0,0 @@
-#include "arch/context_switching/main.hpp"
-
-#include "arch/boot/pointers.hpp"
-#include "arch/context_switching/syscall/syscall_enable.hpp"
-#include "arch/kernel/cpu/call.hpp"
-#include "arch/kernel/cpu/if.hpp"
-#include "arch/kernel/cpu/segment_register.hpp"
-#include "arch/kernel/cpu/tr.hpp"
-#include "arch/user/main.hpp"
-
-namespace teachos::arch::context_switching
-{
-  namespace
-  {
-    constexpr interrupt_descriptor_table::segment_selector KERNEL_CODE_SEGMENT_SELECTOR{
-      1U, interrupt_descriptor_table::segment_selector::REQUEST_LEVEL_KERNEL};
-    constexpr kernel::cpu::far_pointer KERNEL_CODE_POINTER{&kernel::cpu::reload_data_segment_registers,
-                                                           KERNEL_CODE_SEGMENT_SELECTOR};
-    constexpr context_switching::interrupt_descriptor_table::segment_selector USER_CODE_SEGMENT_SELECTOR{
-      3U, context_switching::interrupt_descriptor_table::segment_selector::REQUEST_LEVEL_USER};
-    constexpr context_switching::interrupt_descriptor_table::segment_selector USER_DATA_SEGMENT_SELECTOR{
-      4U, context_switching::interrupt_descriptor_table::segment_selector::REQUEST_LEVEL_USER};
-
-    auto reload_gdtr() -> void
-    {
-      kernel::cpu::call(KERNEL_CODE_POINTER);
-    }
-  }  // namespace
-
-  auto initialize_descriptor_tables() -> descriptor_tables
-  {
-    bool static initalized = false;
-
-    if (!initalized)
-    {
-      kernel::cpu::clear_interrupt_flag();
-
-      segment_descriptor_table::update_gdtr();
-      interrupt_descriptor_table::update_interrupt_descriptor_table_register();
-
-      reload_gdtr();
-      segment_descriptor_table::update_tss_register();
-
-      kernel::cpu::set_interrupt_flag();
-      initalized = true;
-    }
-
-    descriptor_tables tables = {segment_descriptor_table::get_or_create_gdt(),
-                                interrupt_descriptor_table::get_or_create_interrupt_descriptor_table()};
-    return tables;
-  }
-
-  auto switch_to_user_mode() -> void
-  {
-    syscall::enable_syscall();
-    switch_context(USER_DATA_SEGMENT_SELECTOR, USER_CODE_SEGMENT_SELECTOR, user::main);
-  }
-
-  auto switch_context(interrupt_descriptor_table::segment_selector data_segment,
-                      interrupt_descriptor_table::segment_selector code_segment, void (*return_function)()) -> void
-  {
-    (void)initialize_descriptor_tables();
-    kernel::cpu::set_data_segment_registers(data_segment);
-    kernel::cpu::set_code_segment_register(data_segment, code_segment, reinterpret_cast<uint64_t>(return_function));
-  }
-}  // namespace teachos::arch::context_switching