diff options
Diffstat (limited to 'arch/x86_64/src')
| -rw-r--r-- | arch/x86_64/src/kernel/main.cpp | 13 | ||||
| -rw-r--r-- | arch/x86_64/src/memory/allocator/area_frame_allocator.cpp | 24 | ||||
| -rw-r--r-- | arch/x86_64/src/memory/multiboot/memory_map.cpp | 15 |
3 files changed, 38 insertions, 14 deletions
diff --git a/arch/x86_64/src/kernel/main.cpp b/arch/x86_64/src/kernel/main.cpp index ad1eb39..3f768ee 100644 --- a/arch/x86_64/src/kernel/main.cpp +++ b/arch/x86_64/src/kernel/main.cpp @@ -19,14 +19,19 @@ namespace teachos::arch::kernel auto memory_information = memory::multiboot::read_multiboot2(); memory::allocator::area_frame_allocator allocator(memory_information); + auto test2 = allocator.allocate_frame(); + auto test1 = test2.value().start_address(); + auto test3 = test2.value().frame_number; + + if (test1 > test3) + { + } + 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 page = memory::paging::virtual_page::containing_address(address); - auto frame = allocator.allocate_frame(); - exception_handling::assert(frame.has_value(), "[Main] Out of memory exception"); + memory::paging::map_next_free_page_to_frame(allocator, page, 0U); auto optional_frame = memory::paging::translate_page(page); - memory::paging::map_page_to_frame(allocator, page, frame.value(), 0U); - 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, diff --git a/arch/x86_64/src/memory/allocator/area_frame_allocator.cpp b/arch/x86_64/src/memory/allocator/area_frame_allocator.cpp index c2cafce..c3f77e1 100644 --- a/arch/x86_64/src/memory/allocator/area_frame_allocator.cpp +++ b/arch/x86_64/src/memory/allocator/area_frame_allocator.cpp @@ -2,13 +2,16 @@ #include "arch/exception_handling/assert.hpp" +#include <algorithm> +#include <array> +#include <ranges> + namespace teachos::arch::memory::allocator { area_frame_allocator::area_frame_allocator(multiboot::memory_information mem_info) : next_free_frame(0) , current_area(std::nullopt) - , area_begin(mem_info.memory_areas) - , area_end(mem_info.memory_areas + mem_info.area_count) + , memory_areas(mem_info.memory_areas, mem_info.area_count) , kernel_start(physical_frame::containing_address(mem_info.kernel_start)) , kernel_end(physical_frame::containing_address(mem_info.kernel_end)) , multiboot_start(physical_frame::containing_address(mem_info.multiboot_start)) @@ -21,10 +24,17 @@ namespace teachos::arch::memory::allocator { current_area = std::nullopt; - for (multiboot::memory_area_iterator it = begin(); it != end(); ++it) - { - multiboot::memory_area & area = *it; + /**auto filtered_areas = memory_areas | std::views::filter([this](multiboot::memory_area area) { + auto address = area.base_address + area.area_length - 1; + return physical_frame::containing_address(address) >= next_free_frame; + });**/ + + std::ranges::min_element(memory_areas, [](multiboot::memory_area a, multiboot::memory_area b) { + return a.base_address < b.base_address; + }); + for (auto area : memory_areas) + { std::size_t address = area.base_address + area.area_length - 1; if (physical_frame::containing_address(address) >= next_free_frame) { @@ -90,8 +100,4 @@ namespace teachos::arch::memory::allocator exception_handling::assert(false && physical_frame.frame_number == 0, "[deallocate_frame] Not implemented Exception"); } - - auto area_frame_allocator::begin() -> multiboot::memory_area_iterator { return area_begin; } - - auto area_frame_allocator::end() -> multiboot::memory_area_iterator { return area_end; } } // namespace teachos::arch::memory::allocator diff --git a/arch/x86_64/src/memory/multiboot/memory_map.cpp b/arch/x86_64/src/memory/multiboot/memory_map.cpp index 6b1d1d4..da7f05d 100644 --- a/arch/x86_64/src/memory/multiboot/memory_map.cpp +++ b/arch/x86_64/src/memory/multiboot/memory_map.cpp @@ -1,11 +1,13 @@ #include "arch/memory/multiboot/memory_map.hpp" +#include "arch/exception_handling/assert.hpp" + namespace teachos::arch::memory::multiboot { memory_area_iterator::memory_area_iterator(multiboot::memory_area * p) : ptr(p) { - // Nothing to do + exception_handling::assert(ptr, "[Memory Area] Attempted to pass nullptr as iterator"); } multiboot::memory_area & memory_area_iterator::operator*() const { return *ptr; } @@ -21,4 +23,15 @@ namespace teachos::arch::memory::multiboot ++ptr; return *this; } + + memory_area_container::memory_area_container(memory_area * begin, std::size_t size) + : area_begin(begin) + , area_end(begin + size) + { + // Nothing to do + } + + auto memory_area_container::begin() const -> multiboot::memory_area_iterator { return area_begin; } + + auto memory_area_container::end() const -> multiboot::memory_area_iterator { return area_end; } } // namespace teachos::arch::memory::multiboot |