x86_64: move files out of the way

6 files changed, 0 insertions, 371 deletions

diff --git a/arch/x86_64/src/memory/paging/active_page_table.cpp b/arch/x86_64/src/memory/paging/active_page_table.cpp
deleted file mode 100644
index 0113869..0000000
--- a/arch/x86_64/src/memory/paging/active_page_table.cpp
+++ /dev/null
@@ -1,98 +0,0 @@
-#include "arch/memory/paging/active_page_table.hpp"
-
-namespace teachos::arch::memory::paging
-{
-  namespace
-  {
-    paging::virtual_address constexpr PAGE_TABLE_LEVEL_4_ADDRESS = 0xffffffff'fffff000;
-  }
-
-  auto active_page_table::create_or_get() -> active_page_table &
-  {
-    static page_table_handle active_handle{reinterpret_cast<page_table *>(PAGE_TABLE_LEVEL_4_ADDRESS),
-                                           page_table_handle::LEVEL4};
-    static active_page_table active_page{active_handle};
-    return active_page;
-  }
-
-  auto active_page_table::operator[](std::size_t index) -> entry & { return active_handle[index]; }
-
-  auto active_page_table::translate_address(virtual_address address) -> std::optional<allocator::physical_address>
-  {
-    auto const offset = address % allocator::PAGE_FRAME_SIZE;
-    auto const page = virtual_page::containing_address(address);
-    auto const frame = translate_page(page);
-
-    if (frame.has_value())
-    {
-      return frame.value().frame_number * allocator::PAGE_FRAME_SIZE + offset;
-    }
-
-    return std::nullopt;
-  }
-
-  auto active_page_table::translate_page(virtual_page page) -> std::optional<allocator::physical_frame>
-  {
-    auto current_handle = active_handle;
-
-    for (auto level = page_table_handle::LEVEL4; level != page_table_handle::LEVEL1; --level)
-    {
-      auto const next_handle = current_handle.next_table(page.get_level_index(level));
-      // If the next table method failed then it is highly likely that it was a huge page and we therefore have to
-      // parse the table differently. Therefore, we attempt to parse it using the method required by huge pages.
-      if (!next_handle.has_value())
-      {
-        return translate_huge_page(page);
-      }
-      current_handle = next_handle.value();
-    }
-
-    auto const level1_index = page.get_level_index(page_table_handle::LEVEL1);
-    auto const level1_entry = current_handle[level1_index];
-    return level1_entry.calculate_pointed_to_frame();
-  }
-
-  auto active_page_table::translate_huge_page(virtual_page page) -> std::optional<allocator::physical_frame>
-  {
-    auto current_handle = active_handle;
-    auto level3_handle = current_handle.next_table(page.get_level_index(page_table_handle::LEVEL4));
-
-    if (!level3_handle.has_value())
-    {
-      return std::nullopt;
-    }
-
-    auto const level3_entry = level3_handle.value()[page.get_level_index(page_table_handle::LEVEL3)];
-    auto const level3_frame = level3_entry.calculate_pointed_to_frame();
-    if (level3_frame.has_value() && level3_entry.contains_flags(entry::HUGE_PAGE))
-    {
-      exception_handling::assert(
-          level3_frame.value().frame_number % (PAGE_TABLE_ENTRY_COUNT * PAGE_TABLE_ENTRY_COUNT) == 0U,
-          "[Page Mapper] Physical address must be 1 GiB aligned");
-      return allocator::physical_frame{level3_frame.value().frame_number +
-                                       page.get_level_index(page_table_handle::LEVEL2) * PAGE_TABLE_ENTRY_COUNT +
-                                       page.get_level_index(page_table_handle::LEVEL1)};
-    }
-
-    auto level2_handle = level3_handle.value().next_table(page.get_level_index(page_table_handle::LEVEL3));
-    if (level2_handle.has_value())
-    {
-      auto const level2_entry = level2_handle.value()[page.get_level_index(page_table_handle::LEVEL2)];
-      auto const level2_frame = level2_entry.calculate_pointed_to_frame();
-      if (level2_frame.has_value() && level2_entry.contains_flags(entry::HUGE_PAGE))
-      {
-        exception_handling::assert(level2_frame.value().frame_number % PAGE_TABLE_ENTRY_COUNT == 0U,
-                                   "[Page Mapper] Physical address must be 2 MiB aligned");
-        return allocator::physical_frame{level2_frame.value().frame_number +
-                                         page.get_level_index(page_table_handle::LEVEL1)};
-      }
-    }
-    return std::nullopt;
-  }
-
-  active_page_table::active_page_table(page_table_handle active_handle)
-      : active_handle(active_handle)
-  {
-    // Nothing to do
-  }
-}  // namespace teachos::arch::memory::paging
diff --git a/arch/x86_64/src/memory/paging/inactive_page_table.cpp b/arch/x86_64/src/memory/paging/inactive_page_table.cpp
deleted file mode 100644
index 4e0610e..0000000
--- a/arch/x86_64/src/memory/paging/inactive_page_table.cpp
+++ /dev/null
@@ -1,20 +0,0 @@
-#include "arch/memory/paging/inactive_page_table.hpp"
-
-namespace teachos::arch::memory::paging
-{
-  inactive_page_table::inactive_page_table(allocator::physical_frame frame)
-      : page_table_level_4_frame{frame}
-  {
-    // Nothing to do
-  }
-
-  inactive_page_table::inactive_page_table(allocator::physical_frame frame, active_page_table & active_page_table,
-                                           temporary_page & temporary_page)
-      : page_table_level_4_frame{frame}
-  {
-    auto table = temporary_page.map_table_frame(page_table_level_4_frame, active_page_table);
-    table.zero_entries();
-    table[511].set_entry(page_table_level_4_frame, entry::PRESENT | entry::WRITABLE);
-    temporary_page.unmap_page(active_page_table);
-  }
-}  // namespace teachos::arch::memory::paging
diff --git a/arch/x86_64/src/memory/paging/page_entry.cpp b/arch/x86_64/src/memory/paging/page_entry.cpp
deleted file mode 100644
index 57045ca..0000000
--- a/arch/x86_64/src/memory/paging/page_entry.cpp
+++ /dev/null
@@ -1,63 +0,0 @@
-#include "arch/memory/paging/page_entry.hpp"
-
-#include "arch/exception_handling/assert.hpp"
-
-namespace teachos::arch::memory::paging
-{
-  namespace
-  {
-    std::size_t constexpr PHYSICAL_ADDRESS_MASK = 0x000fffff'fffff000;
-  }  // namespace
-
-  entry::entry(uint64_t flags)
-      : flags(flags)
-  {
-    // Nothing to do.
-  }
-
-  entry::entry(multiboot::elf_section_flags elf_flags)
-  {
-    if (elf_flags.contains_flags(multiboot::elf_section_flags::OCCUPIES_MEMORY))
-    {
-      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;
-    }
-  }
-
-  auto entry::is_unused() const -> bool { return flags == 0U; }
-
-  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))
-    {
-      auto const address = flags.to_ulong() & PHYSICAL_ADDRESS_MASK;
-      return allocator::physical_frame::containing_address(address);
-    }
-    return std::nullopt;
-  }
-
-  auto entry::contains_flags(std::bitset<64U> other) const -> bool { return (flags & other) == other; }
-
-  auto entry::set_entry(allocator::physical_frame frame, std::bitset<64U> additional_flags) -> void
-  {
-    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();
-  }
-
-  auto entry::get_flags() const -> std::bitset<64U> { return flags.to_ulong() & ~PHYSICAL_ADDRESS_MASK; }
-}  // namespace teachos::arch::memory::paging
diff --git a/arch/x86_64/src/memory/paging/page_table.cpp b/arch/x86_64/src/memory/paging/page_table.cpp
deleted file mode 100644
index eb11810..0000000
--- a/arch/x86_64/src/memory/paging/page_table.cpp
+++ /dev/null
@@ -1,128 +0,0 @@
-#include "arch/memory/paging/page_table.hpp"
-
-#include <algorithm>
-#include <array>
-#include <memory>
-
-/*
- * This is a linker variable reference. This referenc cannot reside inside a namespace, because in
- * that case the compiler would try to find arch::memory::paging::_end_of_image inside the ELF file.
- */
-extern char _end_of_image;
-
-namespace teachos::arch::memory::paging
-{
-  /**
-   * @brief A Page table containing 512 entries.
-   */
-  struct page_table
-  {
-    auto zero_entries() -> void;
-
-    auto is_empty() const -> bool;
-
-    auto next_table(std::size_t table_index) const -> std::optional<page_table *>;
-
-    auto operator[](std::size_t index) -> entry &;
-
-    auto operator[](std::size_t index) const -> entry const &;
-
-  private:
-    /**
-     * @brief Calculates the address of the next page table level for the given table index.
-     *
-     * @note The next page table address is only valid if the corresponding entry is present and not a huge page.
-     * Meaning we use an index into a Level 4 page table to get the according Level 3 page table address.
-     *
-     * @param table_index Index of this page table in the page table one level higher.
-     * @return An optional of the address of the next page table or null.
-     */
-    auto next_table_address(std::size_t table_index) const -> std::optional<std::size_t>;
-
-    std::array<entry, PAGE_TABLE_ENTRY_COUNT> entries =
-        {};  ///< Entries containing addresses to page tables of a level below or
-             ///< actual virtual addresses for the level 1 page table.
-  };
-
-  auto page_table::zero_entries() -> void
-  {
-    std::ranges::for_each(entries, [](auto & entry) { entry.set_unused(); });
-  }
-
-  auto page_table::is_empty() const -> bool
-  {
-    return std::all_of(entries.begin(), entries.end(), [](entry const & entry) { return entry.is_unused(); });
-  }
-
-  auto page_table::next_table(std::size_t table_index) const -> std::optional<page_table *>
-  {
-    auto const address = next_table_address(table_index);
-    if (address.has_value())
-    {
-      return reinterpret_cast<page_table *>(address.value());
-    }
-    return std::nullopt;
-  }
-
-  auto page_table::operator[](std::size_t index) -> entry &
-  {
-    exception_handling::assert(index < PAGE_TABLE_ENTRY_COUNT, "[Page Table] Index out of bounds");
-    return entries[index];
-  }
-
-  auto page_table::operator[](std::size_t index) const -> entry const &
-  {
-    exception_handling::assert(index < PAGE_TABLE_ENTRY_COUNT, "[Page Table] Index out of bounds");
-    return entries[index];
-  }
-
-  auto page_table::next_table_address(std::size_t table_index) const -> std::optional<std::size_t>
-  {
-    auto const entry = this->operator[](table_index);
-
-    if (entry.contains_flags(entry::PRESENT) && !entry.contains_flags(entry::HUGE_PAGE))
-    {
-      auto const table_address = reinterpret_cast<std::size_t>(this);
-      return ((table_address << 9) | (table_index << 12));
-    }
-    return std::nullopt;
-  }
-
-  page_table_handle::page_table_handle(page_table * table, page_table_handle::level table_level)
-      : table(table)
-      , table_level(table_level)
-  {
-    exception_handling::assert(table != nullptr,
-                               "[Page Table] Attempted to pass nullptr as table to page table table method");
-  }
-
-  auto page_table_handle::zero_entries() -> void { table->zero_entries(); }
-
-  auto page_table_handle::is_empty() const -> bool { return table->is_empty(); }
-
-  auto page_table_handle::next_table(std::size_t table_index) const -> std::optional<page_table_handle>
-  {
-    exception_handling::assert(table_level != page_table_handle::LEVEL1,
-                               "[Page Table] Attempted to call next_table on level 1 page table");
-    auto const next_table = table->next_table(table_index);
-    if (next_table.has_value())
-    {
-      auto const new_level = static_cast<page_table_handle::level>(table_level - 1);
-      return page_table_handle{next_table.value(), new_level};
-    }
-    return std::nullopt;
-  }
-
-  auto page_table_handle::get_level() const -> page_table_handle::level { return table_level; }
-
-  auto page_table_handle::operator[](std::size_t index) -> entry & { return table->operator[](index); }
-
-  auto operator--(page_table_handle::level & value) -> page_table_handle::level &
-  {
-    exception_handling::assert(value != page_table_handle::LEVEL1,
-                               "[Page table] Attempted to decrement enum to value outside of range");
-    auto new_value = static_cast<std::underlying_type<page_table_handle::level>::type>(value);
-    value = static_cast<page_table_handle::level>(--new_value);
-    return value;
-  }
-}  // namespace teachos::arch::memory::paging
diff --git a/arch/x86_64/src/memory/paging/temporary_page.cpp b/arch/x86_64/src/memory/paging/temporary_page.cpp
deleted file mode 100644
index 8e73523..0000000
--- a/arch/x86_64/src/memory/paging/temporary_page.cpp
+++ /dev/null
@@ -1,29 +0,0 @@
-#include "arch/memory/paging/temporary_page.hpp"
-
-#include "arch/memory/paging/page_entry.hpp"
-
-namespace teachos::arch::memory::paging
-{
-  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
-  {
-    exception_handling::assert(!active_table.translate_page(page).has_value(),
-                               "[Temporary page] Page is already mapped");
-
-    active_table.map_page_to_frame(allocator, page, frame, entry::WRITABLE);
-    return page.start_address();
-  }
-
-  auto temporary_page::unmap_page(active_page_table & active_table) -> void
-  {
-    active_table.unmap_page(allocator, page);
-  }
-}  // namespace teachos::arch::memory::paging
diff --git a/arch/x86_64/src/memory/paging/virtual_page.cpp b/arch/x86_64/src/memory/paging/virtual_page.cpp
deleted file mode 100644
index d374156..0000000
--- a/arch/x86_64/src/memory/paging/virtual_page.cpp
+++ /dev/null
@@ -1,33 +0,0 @@
-#include "arch/memory/paging/virtual_page.hpp"
-
-#include "arch/exception_handling/assert.hpp"
-
-namespace teachos::arch::memory::paging
-{
-  auto virtual_page::containing_address(virtual_address address) -> virtual_page
-  {
-    exception_handling::assert(address < 0x00008000'00000000 || address >= 0xffff8000'00000000,
-                               "[Virtual Page] Attempted to create virtual page from invalid address");
-    return virtual_page{address / allocator::PAGE_FRAME_SIZE};
-  }
-
-  auto virtual_page::start_address() const -> virtual_address { return page_number * allocator::PAGE_FRAME_SIZE; }
-
-  auto virtual_page::get_level_index(page_table_handle::level level) const -> size_t
-  {
-    return (page_number >> (level * 9U)) & 0x1FF;
-  }
-
-  auto virtual_page::operator++(int) -> virtual_page
-  {
-    virtual_page const old_value = *this;
-    ++page_number;
-    return old_value;
-  }
-
-  auto virtual_page::operator++() -> virtual_page &
-  {
-    ++page_number;
-    return *this;
-  }
-}  // namespace teachos::arch::memory::paging