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#include "kapi/memory.hpp"
#include "kapi/system.hpp"
#include "x86_64/boot/boot.hpp"
#include "x86_64/boot/ld.hpp"
#include "x86_64/memory/address.hpp"
#include "x86_64/memory/region_allocator.hpp"
#include <multiboot2/information.hpp>
#include <atomic>
namespace teachos::memory
{
using namespace x86_64::memory;
using namespace x86_64::boot;
namespace
{
auto constinit is_initialized = std::atomic_flag{};
auto create_memory_information() -> region_allocator::memory_information
{
auto const & mbi = multiboot_information_pointer.get();
auto map = mbi->memory_map();
return {std::make_pair(physical_address{&_start_physical}, physical_address{&_end_physical}),
std::make_pair(physical_address{std::bit_cast<std::byte *>(&mbi)},
physical_address{std::bit_cast<std::byte *>(&mbi) + mbi->size_bytes()}),
map};
};
} // namespace
auto init() -> void
{
if (is_initialized.test_and_set())
{
system::panic("[x86_64] Memory management has already been initialized.");
}
auto memory_map = multiboot_information_pointer->maybe_memory_map();
if (!memory_map)
{
system::panic("[x86_64] No memory map available.");
}
auto mem_info = create_memory_information();
auto allocator = region_allocator{mem_info};
static_cast<void>(allocator);
// kernel::cpu::set_cr0_bit(kernel::cpu::cr0_flags::WRITE_PROTECT);
// kernel::cpu::set_efer_bit(kernel::cpu::efer_flags::NXE);
// paging::kernel_mapper kernel(allocator, memory_information);
// kernel.remap_kernel();
// video::vga::text::write("Kernel remapping successful", video::vga::text::common_attributes::green_on_black);
// video::vga::text::newline();
// remap_heap(heap::KERNEL_HEAP_START, heap::KERNEL_HEAP_SIZE);
// video::vga::text::write("Heap remapping successful", video::vga::text::common_attributes::green_on_black);
// video::vga::text::newline();
}
} // namespace teachos::memory
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