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#include "arch/kernel/main.hpp"
#include "arch/boot/multiboot.hpp"
#include "arch/boot/pointers.hpp"
#include "arch/video/vga/text.hpp"
namespace teachos::arch::kernel
{
auto print_memory_map(memory_map_info * mminfo) -> void
{
using namespace video::vga;
uint32_t const entry_size = mminfo->entry_size;
uint32_t const entry_version = mminfo->entry_version;
text::write("Entry Size: ", text::common_attributes::green_on_black);
text::write_number(entry_size, text::common_attributes::green_on_black);
text::write("Version: ", text::common_attributes::green_on_black);
text::write_number(entry_version, text::common_attributes::green_on_black);
uint32_t const remaining_size = mminfo->tag.size - (4 * sizeof(uint32_t));
uint32_t const entry_amount = remaining_size / entry_size;
auto begin = &mminfo->entries;
auto end = begin + entry_amount;
for (auto entry = begin; entry != end; ++entry)
{
text::write("Base Address: ", text::common_attributes::green_on_black);
text::write_number(entry->base_addr, text::common_attributes::green_on_black);
text::write("Length: ", text::common_attributes::green_on_black);
text::write_number(entry->length, text::common_attributes::green_on_black);
text::write("Type: ", text::common_attributes::green_on_black);
text::write_number(entry->type, text::common_attributes::green_on_black);
text::write("Reserved: ", text::common_attributes::green_on_black);
text::write_number(entry->reserved, text::common_attributes::green_on_black);
}
}
auto print_elf_sections(elf_symbols_section * symbol) -> void
{
using namespace video::vga;
uint16_t const num = symbol->num;
text::write("Number of entries: ", text::common_attributes::green_on_black);
text::write_number(num, text::common_attributes::green_on_black);
uint16_t const entsize = symbol->entsize;
text::write("Entry Size: ", text::common_attributes::green_on_black);
text::write_number(entsize, text::common_attributes::green_on_black);
uint16_t const shndx = symbol->shndx;
text::write("Section index: ", text::common_attributes::green_on_black);
text::write_number(shndx, text::common_attributes::green_on_black);
auto begin = &symbol->sections;
auto end = begin + num;
for (auto section = begin; section != end; ++section)
{
uint32_t const sh_name = section->sh_name;
text::write("Section name: ", text::common_attributes::green_on_black);
text::write_number(sh_name, text::common_attributes::green_on_black);
uint32_t const sh_type = section->sh_type;
text::write("Section type: ", text::common_attributes::green_on_black);
text::write_number(sh_type, text::common_attributes::green_on_black);
uint64_t const sh_flags = section->sh_flags;
text::write("Section flags: ", text::common_attributes::green_on_black);
text::write_number(sh_flags, text::common_attributes::green_on_black);
uint64_t const sh_addr = section->sh_addr;
text::write("Section name: ", text::common_attributes::green_on_black);
text::write_number(sh_addr, text::common_attributes::green_on_black);
uint64_t const sh_offset = section->sh_offset;
text::write("Section name: ", text::common_attributes::green_on_black);
text::write_number(sh_offset, text::common_attributes::green_on_black);
uint64_t const sh_size = section->sh_size;
text::write("Section name: ", text::common_attributes::green_on_black);
text::write_number(sh_size, text::common_attributes::green_on_black);
uint32_t const sh_link = section->sh_link;
text::write("Section name: ", text::common_attributes::green_on_black);
text::write_number(sh_link, text::common_attributes::green_on_black);
uint32_t const sh_info = section->sh_info;
text::write("Section name: ", text::common_attributes::green_on_black);
text::write_number(sh_info, text::common_attributes::green_on_black);
uint64_t const sh_addralign = section->sh_addralign;
text::write("Section name: ", text::common_attributes::green_on_black);
text::write_number(sh_addralign, text::common_attributes::green_on_black);
uint64_t const sh_entsize = section->sh_entsize;
text::write("Section name: ", text::common_attributes::green_on_black);
text::write_number(sh_entsize, text::common_attributes::green_on_black);
}
}
auto main() -> void
{
using namespace video::vga;
text::clear();
text::cursor(false);
text::write("TeachOS is starting up...", text::common_attributes::green_on_black);
auto mip = arch::boot::multiboot_information_pointer;
// Address of the first multiboot tag
auto multiboot_tag = (struct multiboot_tag *)((uint8_t *)mip + 8);
/*
* Loop over the multiboot2 tags to access the information needed.
* Tags are defined in the header.
*/
for (auto tag = multiboot_tag; tag->type != MULTIBOOT_TAG_TYPE_END;
tag = (struct multiboot_tag *)((uint8_t *)tag + ((tag->size + 7) & ~7)))
{
switch (tag->type)
{
case MULTIBOOT_TAG_TYPE_ELF_SECTIONS:
print_elf_sections((struct elf_symbols_section *)tag);
break;
case MULTIBOOT_TAG_TYPE_MMAP:
print_memory_map((struct memory_map_info *)tag);
break;
}
}
}
} // namespace teachos::arch::kernel
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