x86_64: move files out of the way

46 files changed, 0 insertions, 2270 deletions

diff --git a/arch/x86_64/src/context_switching/interrupt_descriptor_table/gate_descriptor.cpp b/arch/x86_64/src/context_switching/interrupt_descriptor_table/gate_descriptor.cpp
deleted file mode 100644
index 28f289c..0000000
--- a/arch/x86_64/src/context_switching/interrupt_descriptor_table/gate_descriptor.cpp
+++ /dev/null
@@ -1,24 +0,0 @@
-#include "arch/context_switching/interrupt_descriptor_table/gate_descriptor.hpp"
-
-namespace teachos::arch::context_switching::interrupt_descriptor_table
-{
-  gate_descriptor::gate_descriptor(uint128_t flags)
-      : _offset_1(flags)
-      , _selector(flags >> 19U, flags >> 16U)
-      , _ist(flags >> 32U)
-      , _flags(flags >> 40U)
-      , _offset_2(flags >> 48U)
-  {
-    // Nothing to do.
-  }
-
-  gate_descriptor::gate_descriptor(segment_selector selector, ist_offset ist, idt_flags flags, uint64_t offset)
-      : _offset_1(offset)
-      , _selector(selector)
-      , _ist(ist)
-      , _flags(flags)
-      , _offset_2(offset >> 16U)
-  {
-    // Nothing to do.
-  }
-}  // namespace teachos::arch::context_switching::interrupt_descriptor_table
diff --git a/arch/x86_64/src/context_switching/interrupt_descriptor_table/idt_flags.cpp b/arch/x86_64/src/context_switching/interrupt_descriptor_table/idt_flags.cpp
deleted file mode 100644
index d36a4c1..0000000
--- a/arch/x86_64/src/context_switching/interrupt_descriptor_table/idt_flags.cpp
+++ /dev/null
@@ -1,17 +0,0 @@
-#include "arch/context_switching/interrupt_descriptor_table/idt_flags.hpp"
-
-namespace teachos::arch::context_switching::interrupt_descriptor_table
-{
-  idt_flags::idt_flags(uint8_t flags)
-      : _flags(flags)
-  {
-    // Nothing to do.
-  }
-
-  auto idt_flags::contains_flags(std::bitset<8U> other) const -> bool
-  {
-    return (std::bitset<8U>{_flags} & other) == other;
-  }
-
-  auto idt_flags::operator|=(std::bitset<8U> other) -> void { _flags |= other.to_ulong(); }
-}  // namespace teachos::arch::context_switching::interrupt_descriptor_table
diff --git a/arch/x86_64/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.cpp b/arch/x86_64/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.cpp
deleted file mode 100644
index 7aa0859..0000000
--- a/arch/x86_64/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.cpp
+++ /dev/null
@@ -1,53 +0,0 @@
-#include "arch/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.hpp"
-
-#include "arch/exception_handling/assert.hpp"
-#include "arch/interrupt_handling/generic_interrupt_handler.hpp"
-#include "arch/kernel/cpu/idtr.hpp"
-
-namespace teachos::arch::context_switching::interrupt_descriptor_table
-{
-  namespace
-  {
-    /// @brief Amount of currently reserved interrupt indicies.
-    /// See https://wiki.osdev.org/Interrupt_Descriptor_Table#IDT_items for more information.
-    constexpr uint16_t RESERVED_INTERRUPT_COUNT = 256U;
-
-    auto create_interrupt_descriptor_table() -> interrupt_descriptor_table
-    {
-      interrupt_descriptor_table interrupt_descriptor_table{RESERVED_INTERRUPT_COUNT};
-
-      uint64_t offset = reinterpret_cast<uint64_t>(interrupt_handling::generic_interrupt_handler);
-      segment_selector selector{1U, segment_selector::REQUEST_LEVEL_KERNEL};
-      ist_offset ist{0U};
-      idt_flags flags{idt_flags::DESCRIPTOR_LEVEL_KERNEL | idt_flags::INTERRUPT_GATE | idt_flags::PRESENT};
-
-      for (std::size_t i = 0; i < interrupt_descriptor_table.size(); i++)
-      {
-        interrupt_descriptor_table.at(i) = {selector, ist, flags, offset};
-      }
-
-      return interrupt_descriptor_table;
-    }
-  }  // namespace
-
-  auto get_or_create_interrupt_descriptor_table() -> interrupt_descriptor_table &
-  {
-    // Interrupt Descriptor Table needs to be kept alive
-    static interrupt_descriptor_table idt = create_interrupt_descriptor_table();
-    return idt;
-  }
-
-  auto update_interrupt_descriptor_table_register() -> void
-  {
-    decltype(auto) idt = get_or_create_interrupt_descriptor_table();
-
-    interrupt_descriptor_table_pointer idt_pointer{static_cast<uint16_t>((idt.size() * sizeof(gate_descriptor)) - 1),
-                                                   idt.data()};
-    kernel::cpu::load_interrupt_descriptor_table(idt_pointer);
-
-    auto const stored_gdt_pointer = kernel::cpu::store_interrupt_descriptor_table();
-    arch::exception_handling::assert(
-        idt_pointer == stored_gdt_pointer,
-        "[Interrupt Descriptor Table] Loaded IDTR value is not the same as the stored value.");
-  }
-}  // namespace teachos::arch::context_switching::interrupt_descriptor_table
diff --git a/arch/x86_64/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table_pointer.cpp b/arch/x86_64/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table_pointer.cpp
deleted file mode 100644
index 7bcbae6..0000000
--- a/arch/x86_64/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table_pointer.cpp
+++ /dev/null
@@ -1,13 +0,0 @@
-#include "arch/context_switching/interrupt_descriptor_table/interrupt_descriptor_table_pointer.hpp"
-
-namespace teachos::arch::context_switching::interrupt_descriptor_table
-{
-  interrupt_descriptor_table_pointer::interrupt_descriptor_table_pointer(uint16_t table_length,
-                                                                         gate_descriptor * address)
-      : table_length(table_length)
-      , address(address)
-  {
-    // Nothing to do.
-  }
-
-}  // namespace teachos::arch::context_switching::interrupt_descriptor_table
diff --git a/arch/x86_64/src/context_switching/interrupt_descriptor_table/ist_offset.cpp b/arch/x86_64/src/context_switching/interrupt_descriptor_table/ist_offset.cpp
deleted file mode 100644
index a70e75d..0000000
--- a/arch/x86_64/src/context_switching/interrupt_descriptor_table/ist_offset.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-#include "arch/context_switching/interrupt_descriptor_table/ist_offset.hpp"
-
-namespace teachos::arch::context_switching::interrupt_descriptor_table
-{
-  ist_offset::ist_offset(uint8_t index)
-      : _ist(index)
-  {
-    // Nothing to do.
-  }
-}  // namespace teachos::arch::context_switching::interrupt_descriptor_table
diff --git a/arch/x86_64/src/context_switching/interrupt_descriptor_table/segment_selector.cpp b/arch/x86_64/src/context_switching/interrupt_descriptor_table/segment_selector.cpp
deleted file mode 100644
index 27f0a3b..0000000
--- a/arch/x86_64/src/context_switching/interrupt_descriptor_table/segment_selector.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "arch/context_switching/interrupt_descriptor_table/segment_selector.hpp"
-
-namespace teachos::arch::context_switching::interrupt_descriptor_table
-{
-  auto segment_selector::contains_flags(std::bitset<3U> other) const -> bool
-  {
-    return (std::bitset<3U>{_flags} & other) == other;
-  }
-
-  auto segment_selector::get_index() const -> uint16_t { return _index; }
-
-  auto segment_selector::operator|=(std::bitset<3U> other) -> void { _flags |= other.to_ulong(); }
-
-  segment_selector::operator uint16_t() const { return *reinterpret_cast<uint16_t const *>(this); }
-}  // namespace teachos::arch::context_switching::interrupt_descriptor_table
diff --git a/arch/x86_64/src/context_switching/main.cpp b/arch/x86_64/src/context_switching/main.cpp
deleted file mode 100644
index 9539428..0000000
--- a/arch/x86_64/src/context_switching/main.cpp
+++ /dev/null
@@ -1,63 +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
-  {
-    static bool 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
diff --git a/arch/x86_64/src/context_switching/segment_descriptor_table/access_byte.cpp b/arch/x86_64/src/context_switching/segment_descriptor_table/access_byte.cpp
deleted file mode 100644
index e31e021..0000000
--- a/arch/x86_64/src/context_switching/segment_descriptor_table/access_byte.cpp
+++ /dev/null
@@ -1,17 +0,0 @@
-#include "arch/context_switching/segment_descriptor_table/access_byte.hpp"
-
-namespace teachos::arch::context_switching::segment_descriptor_table
-{
-  access_byte::access_byte(uint8_t flags)
-      : _flags(flags)
-  {
-    // Nothing to do.
-  }
-
-  auto access_byte::contains_flags(std::bitset<8U> other) const -> bool
-  {
-    return (std::bitset<8U>{_flags} & other) == other;
-  }
-
-  auto access_byte::operator|=(std::bitset<8U> other) -> void { _flags |= other.to_ulong(); }
-}  // namespace teachos::arch::context_switching::segment_descriptor_table
diff --git a/arch/x86_64/src/context_switching/segment_descriptor_table/gdt_flags.cpp b/arch/x86_64/src/context_switching/segment_descriptor_table/gdt_flags.cpp
deleted file mode 100644
index e444a24..0000000
--- a/arch/x86_64/src/context_switching/segment_descriptor_table/gdt_flags.cpp
+++ /dev/null
@@ -1,20 +0,0 @@
-#include "arch/context_switching/segment_descriptor_table/gdt_flags.hpp"
-
-namespace teachos::arch::context_switching::segment_descriptor_table
-{
-  gdt_flags::gdt_flags(uint8_t flags, std::bitset<20U> limit)
-      : _limit_2(limit.to_ulong() >> 16U)
-      , _flags(flags)
-  {
-    // Nothing to do.
-  }
-
-  auto gdt_flags::contains_flags(std::bitset<4U> other) const -> bool
-  {
-    return (std::bitset<4U>{_flags} & other) == other;
-  }
-
-  auto gdt_flags::get_limit() const -> std::bitset<4U> { return std::bitset<4U>{_limit_2}; }
-
-  auto gdt_flags::operator|=(std::bitset<4U> other) -> void { _flags |= other.to_ulong(); }
-}  // namespace teachos::arch::context_switching::segment_descriptor_table
diff --git a/arch/x86_64/src/context_switching/segment_descriptor_table/global_descriptor_table.cpp b/arch/x86_64/src/context_switching/segment_descriptor_table/global_descriptor_table.cpp
deleted file mode 100644
index bbcee31..0000000
--- a/arch/x86_64/src/context_switching/segment_descriptor_table/global_descriptor_table.cpp
+++ /dev/null
@@ -1,109 +0,0 @@
-#include "arch/context_switching/segment_descriptor_table/global_descriptor_table.hpp"
-
-#include "arch/context_switching/segment_descriptor_table/segment_descriptor_extension.hpp"
-#include "arch/exception_handling/assert.hpp"
-#include "arch/kernel/cpu/gdtr.hpp"
-#include "arch/kernel/cpu/tr.hpp"
-
-namespace teachos::arch::context_switching::segment_descriptor_table
-{
-  namespace
-  {
-    auto create_segment_descriptor(segment_descriptor_type segment_descriptor_type, access_byte access_level)
-        -> segment_descriptor_base
-    {
-      uint64_t constexpr BASE = 0x0;
-      std::bitset<20U> constexpr LIMIT{0xFFFFF};
-      gdt_flags flags{gdt_flags::GRANULARITY, LIMIT};
-
-      access_level |= access_byte::PRESENT | access_byte::CODE_OR_DATA_SEGMENT;
-      if (segment_descriptor_type == segment_descriptor_type::CODE_SEGMENT)
-      {
-        flags |= gdt_flags::LONG_MODE;
-        access_level |= access_byte::CODE_SEGMENT | access_byte::READABLE;
-      }
-      else if (segment_descriptor_type == segment_descriptor_type::DATA_SEGMENT)
-      {
-        access_level |= access_byte::WRITABLE;
-      }
-
-      segment_descriptor_base const segment_descriptor_base{access_level, flags, BASE, LIMIT};
-      return segment_descriptor_base;
-    }
-
-    auto create_tss_descriptor(task_state_segment * tss) -> segment_descriptor_extension
-    {
-      uint64_t constexpr TSS_LIMIT = sizeof(task_state_segment) - 1;
-      access_byte const tss_access_byte{access_byte::PRESENT | access_byte::DESCRIPTOR_LEVEL_KERNEL |
-                                        access_byte::TASK_STATE_SEGMENT_AVAILABLE};
-      gdt_flags const tss_gdt_flags{0U, TSS_LIMIT};
-      segment_descriptor_extension const tss_descriptor{tss_access_byte, tss_gdt_flags, reinterpret_cast<uint64_t>(tss),
-                                                        TSS_LIMIT};
-      return tss_descriptor;
-    }
-
-    auto create_gdt() -> global_descriptor_table
-    {
-      segment_descriptor_base const null_segment{0};
-      segment_descriptor_base const kernel_code_segment =
-          create_segment_descriptor(segment_descriptor_type::CODE_SEGMENT, access_byte::DESCRIPTOR_LEVEL_KERNEL);
-      segment_descriptor_base const kernel_data_segment =
-          create_segment_descriptor(segment_descriptor_type::DATA_SEGMENT, access_byte::DESCRIPTOR_LEVEL_KERNEL);
-      segment_descriptor_base const user_code_segment =
-          create_segment_descriptor(segment_descriptor_type::CODE_SEGMENT, access_byte::DESCRIPTOR_LEVEL_USER);
-      segment_descriptor_base const user_data_segment =
-          create_segment_descriptor(segment_descriptor_type::DATA_SEGMENT, access_byte::DESCRIPTOR_LEVEL_USER);
-
-      // Task State Segment needs to be kept alive
-      static auto tss = new task_state_segment();
-      segment_descriptor_extension const tss_descriptor = create_tss_descriptor(tss);
-
-      global_descriptor_table global_descriptor_table{null_segment,
-                                                      kernel_code_segment,
-                                                      kernel_data_segment,
-                                                      user_code_segment,
-                                                      user_data_segment,
-                                                      tss_descriptor.get_first_gdt_entry(),
-                                                      tss_descriptor.get_second_gdt_entry()};
-      return global_descriptor_table;
-    }
-  }  // namespace
-
-  auto get_or_create_gdt() -> global_descriptor_table &
-  {
-    // Global Descriptor Table needs to be kept alive
-    static global_descriptor_table gdt = create_gdt();
-    return gdt;
-  }
-
-  auto update_gdtr() -> void
-  {
-    decltype(auto) gdt = get_or_create_gdt();
-
-    // Calculate the size of the gdt in bytes - 1. This subtraction occurs because the maximum value of Size is 65535,
-    // while the GDT can be up to 65536 bytes in length (8192 entries). Further, no GDT can have a size of 0 bytes.
-    uint16_t gdt_size = static_cast<uint16_t>((gdt.size() * sizeof(segment_descriptor_base)) - 1);
-    global_descriptor_table_pointer gdt_pointer{gdt_size, gdt.data()};
-    kernel::cpu::load_global_descriptor_table(gdt_pointer);
-
-    auto const stored_gdt_pointer = kernel::cpu::store_global_descriptor_table();
-    arch::exception_handling::assert(
-        gdt_pointer == stored_gdt_pointer,
-        "[Global Descriptor Table] Loaded GDTR value is not the same as the stored value.");
-  }
-
-  auto update_tss_register() -> void
-  {
-    decltype(auto) gdt = get_or_create_gdt();
-
-    // Load task state segment descriptor from the last element in the global descriptor table, done by calculating
-    // offset in bytes to the start of the segment descriptor (5 * 8) = 40
-    uint16_t tss_selector = (gdt.size() * sizeof(segment_descriptor_base)) - sizeof(segment_descriptor_extension);
-    kernel::cpu::load_task_register(tss_selector);
-
-    auto const stored_task_register = kernel::cpu::store_task_register();
-    arch::exception_handling::assert(tss_selector == stored_task_register,
-                                     "[Global Descriptor Table] Loaded TR value is not the same as the stored value.");
-  }
-
-}  // namespace teachos::arch::context_switching::segment_descriptor_table
diff --git a/arch/x86_64/src/context_switching/segment_descriptor_table/global_descriptor_table_pointer.cpp b/arch/x86_64/src/context_switching/segment_descriptor_table/global_descriptor_table_pointer.cpp
deleted file mode 100644
index 79088b8..0000000
--- a/arch/x86_64/src/context_switching/segment_descriptor_table/global_descriptor_table_pointer.cpp
+++ /dev/null
@@ -1,11 +0,0 @@
-#include "arch/context_switching/segment_descriptor_table/global_descriptor_table_pointer.hpp"
-
-namespace teachos::arch::context_switching::segment_descriptor_table
-{
-  global_descriptor_table_pointer::global_descriptor_table_pointer(uint16_t table_length, uint64_t * address)
-      : table_length(table_length)
-      , address(address)
-  {
-    // Nothing to do.
-  }
-}  // namespace teachos::arch::context_switching::segment_descriptor_table
diff --git a/arch/x86_64/src/context_switching/segment_descriptor_table/segment_descriptor_base.cpp b/arch/x86_64/src/context_switching/segment_descriptor_table/segment_descriptor_base.cpp
deleted file mode 100644
index 04804d9..0000000
--- a/arch/x86_64/src/context_switching/segment_descriptor_table/segment_descriptor_base.cpp
+++ /dev/null
@@ -1,38 +0,0 @@
-#include "arch/context_switching/segment_descriptor_table/segment_descriptor_base.hpp"
-
-namespace teachos::arch::context_switching::segment_descriptor_table
-{
-  segment_descriptor_base::segment_descriptor_base(uint64_t flags)
-      : _limit_1(flags)
-      , _base_1(flags >> 16U)
-      , _access(flags >> 40U)
-      , _flag(flags >> 52U, flags >> 48U)
-      , _base_2(flags >> 56U)
-  {
-    // Nothing to do.
-  }
-
-  segment_descriptor_base::segment_descriptor_base(access_byte access_byte, gdt_flags flags, uint32_t base,
-                                                   std::bitset<20U> limit)
-      : _limit_1(limit.to_ulong())
-      , _base_1(base)
-      , _access(access_byte)
-      , _flag(flags)
-      , _base_2(base >> 24U)
-  {
-    // Nothing to do
-  }
-
-  auto segment_descriptor_base::get_segment_type() const -> segment_descriptor_type
-  {
-    if (!_access.contains_flags(access_byte::CODE_OR_DATA_SEGMENT))
-    {
-      return segment_descriptor_type::SYSTEM_SEGMENT;
-    }
-    return _access.contains_flags(access_byte::CODE_SEGMENT) ? segment_descriptor_type::CODE_SEGMENT
-                                                             : segment_descriptor_type::DATA_SEGMENT;
-  }
-
-  segment_descriptor_base::operator uint64_t() const { return *reinterpret_cast<uint64_t const *>(this); }
-
-}  // namespace teachos::arch::context_switching::segment_descriptor_table
diff --git a/arch/x86_64/src/context_switching/segment_descriptor_table/segment_descriptor_extension.cpp b/arch/x86_64/src/context_switching/segment_descriptor_table/segment_descriptor_extension.cpp
deleted file mode 100644
index a28ec9b..0000000
--- a/arch/x86_64/src/context_switching/segment_descriptor_table/segment_descriptor_extension.cpp
+++ /dev/null
@@ -1,24 +0,0 @@
-#include "arch/context_switching/segment_descriptor_table/segment_descriptor_extension.hpp"
-
-namespace teachos::arch::context_switching::segment_descriptor_table
-{
-  segment_descriptor_extension::segment_descriptor_extension(uint128_t flags)
-      : _base(flags)
-      , _base_3(flags >> 64U)
-  {
-    // Nothing to do.
-  }
-
-  segment_descriptor_extension::segment_descriptor_extension(access_byte access_byte, gdt_flags flags, uint64_t base,
-                                                             std::bitset<20U> limit)
-      : _base(access_byte, flags, base, limit)
-      , _base_3(base >> 32U)
-  {
-    // Nothing to do
-  }
-
-  auto segment_descriptor_extension::get_first_gdt_entry() const -> segment_descriptor_base { return _base; }
-
-  auto segment_descriptor_extension::get_second_gdt_entry() const -> uint64_t { return _base_3; }
-
-}  // namespace teachos::arch::context_switching::segment_descriptor_table
diff --git a/arch/x86_64/src/context_switching/syscall/main.cpp b/arch/x86_64/src/context_switching/syscall/main.cpp
deleted file mode 100644
index b4ab468..0000000
--- a/arch/x86_64/src/context_switching/syscall/main.cpp
+++ /dev/null
@@ -1,35 +0,0 @@
-#include "arch/context_switching/syscall/main.hpp"
-
-namespace teachos::arch::context_switching::syscall
-{
-  auto syscall(type syscall_number, arguments args) -> response
-  {
-    asm volatile("mov %[input], %%rax"
-                 : /* no output from call */