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#include "arch/kernel/main.hpp"
#include "arch/exception_handling/assert.hpp"
#include "arch/memory/allocator/area_frame_allocator.hpp"
#include "arch/memory/multiboot/reader.hpp"
#include "arch/memory/paging/temporary_page.hpp"
#include "arch/video/vga/text.hpp"
#include <algorithm>
namespace teachos::arch::kernel
{
auto main() -> void
{
video::vga::text::clear();
video::vga::text::cursor(false);
video::vga::text::write("TeachOS is starting up...", video::vga::text::common_attributes::green_on_black);
auto const memory_information = memory::multiboot::read_multiboot2();
memory::allocator::area_frame_allocator allocator(memory_information);
size_t address = 42 * memory::paging::PAGE_TABLE_ENTRY_COUNT * memory::paging::PAGE_TABLE_ENTRY_COUNT *
memory::allocator::PAGE_FRAME_SIZE; // 42th P3 entry
auto const page = memory::paging::virtual_page::containing_address(address);
auto & active_table = memory::paging::active_page_table::create_or_get();
memory::paging::temporary_page temp_page{page, allocator};
temp_page.zero_entries(active_table);
// memory::paging::map_next_free_page_to_frame(allocator, page, 0U);
// auto optional_frame = memory::paging::translate_page(page);
// video::vga::text::newline();
// video::vga::text::write("Mapped physical frame: ", video::vga::text::common_attributes::green_on_black);
// video::vga::text::write_number(optional_frame.value().frame_number,
// video::vga::text::common_attributes::green_on_black);
// video::vga::text::write(" to virtual page: ", video::vga::text::common_attributes::green_on_black);
// video::vga::text::write_number(page.page_number, video::vga::text::common_attributes::green_on_black);
// memory::paging::unmap_page(allocator, page);
// video::vga::text::newline();
// video::vga::text::write("Unapped virtual page from physical frame: ",
// video::vga::text::common_attributes::green_on_black);
// optional_frame = memory::paging::translate_page(page);
// exception_handling::assert(!optional_frame.has_value(), "[Main] Ummapping failed");
// video::vga::text::write_number(page.page_number, video::vga::text::common_attributes::green_on_black);
auto last_allocated = allocator.allocate_frame();
auto allocated = last_allocated;
do
{
last_allocated = allocated;
allocated = allocator.allocate_frame();
} while (allocated);
video::vga::text::newline();
video::vga::text::write("Allocated Frames: ", video::vga::text::common_attributes::green_on_black);
video::vga::text::write_number(last_allocated.value().frame_number,
video::vga::text::common_attributes::green_on_black);
}
} // namespace teachos::arch::kernel
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