os: rework kernel architecture

Rework the code structure and architecture of the kernel by separating
platform-dependent and platform-independent code more cleanly. As of
this patchset, full feature parity has not been achieved. Nonetheless, a
sufficient subset of functionality has been ported to the new
architecture to demonstrate the feasibility of the new structure.

1 files changed, 0 insertions, 66 deletions

diff --git a/arch/x86_64/src/video/vga/text.cpp b/arch/x86_64/src/video/vga/text.cpp
deleted file mode 100644
index b070a0a..0000000
--- a/arch/x86_64/src/video/vga/text.cpp
+++ /dev/null
@@ -1,66 +0,0 @@
-#include "arch/video/vga/text.hpp"
-
-#include "arch/video/vga/io.hpp"
-#include "memory/asm_pointer.hpp"
-
-#include <algorithm>
-#include <string_view>
-#include <utility>
-
-extern "C" std::pair<char, teachos::arch::video::vga::text::attribute> * vga_buffer_pointer;
-
-namespace teachos::arch::video::vga::text
-{
-  namespace
-  {
-    auto constexpr DEFAULT_TEXT_BUFFER_WIDTH = 80U;
-    auto constexpr DEFAULT_TEXT_BUFFER_HEIGHT = 25U;
-
-    auto constinit text_buffer = teachos::memory::asm_pointer{vga_buffer_pointer};
-  }  // namespace
-
-  auto clear(attribute attribute) -> void
-  {
-    *text_buffer = reinterpret_cast<decltype(text_buffer)::pointer>(DEFAULT_VGA_TEXT_BUFFER_ADDRESS);
-    std::ranges::fill_n(*text_buffer, 2000, std::pair{' ', attribute});
-  }
-
-  auto cursor(bool enabled) -> void
-  {
-    auto cursor_disable_byte = std::byte{!enabled} << 5;
-
-    crtc::address_port::write(crtc::registers::cursor_start);
-    crtc::data_port::write(vga::crtc::data_port::read() | cursor_disable_byte);
-  }
-
-  auto newline() -> void
-  {
-    auto base = reinterpret_cast<decltype(text_buffer)::pointer>(DEFAULT_VGA_TEXT_BUFFER_ADDRESS);
-    auto & raw_buffer = *text_buffer;
-    auto current_line = (raw_buffer - base) / DEFAULT_TEXT_BUFFER_WIDTH;
-    auto next_line = current_line + 1;
-
-    if (next_line >= DEFAULT_TEXT_BUFFER_HEIGHT)
-    {
-      auto begin = base + DEFAULT_TEXT_BUFFER_WIDTH;
-      auto end = base + DEFAULT_TEXT_BUFFER_WIDTH * DEFAULT_TEXT_BUFFER_HEIGHT;
-      std::ranges::move(begin, end, base);
-      raw_buffer = base + current_line * DEFAULT_TEXT_BUFFER_WIDTH;
-    }
-    else
-    {
-      raw_buffer = base + next_line * DEFAULT_TEXT_BUFFER_WIDTH;
-    }
-  }
-
-  auto write_char(char code_point, attribute attribute) -> void
-  {
-    auto & p = *text_buffer;
-    (*p++) = std::pair{code_point, attribute};
-  };
-
-  auto write(std::string_view code_points, attribute attribute) -> void
-  {
-    std::ranges::for_each(code_points, [&](auto code_point) { write_char(code_point, attribute); });
-  }
-}  // namespace teachos::arch::video::vga::text