Luna/kernel/src/main.cpp
2022-11-13 16:31:32 +01:00

59 lines
1.3 KiB
C++

#include "Framebuffer.h"
#include "Init.h"
#include "MemoryManager.h"
#include "arch/MMU.h"
#include "arch/Serial.h"
extern u8 fb[1];
extern "C" void _start()
{
Init::check_magic();
Init::early_init();
Serial::println("Hello, world!");
Framebuffer::rect(0, 0, 200, 200, 0xFF00FF00);
Serial::println(MMU::get_physical((u64)fb).has_error() ? "fb is not mapped" : "fb is mapped!!");
const u64 address = 0xfffffffff8000000;
u64 physical = MemoryManager::alloc_physical_page().release_value();
auto rc = MMU::map(address, physical, MMU::ReadWrite);
bool success = !rc.has_error();
int flags;
u8* ptr;
if (success) Serial::println("Mapped page :)");
else
{
Serial::println("Failed to map page");
goto failure;
}
if (MMU::get_physical(address).release_value() == physical) Serial::println("Mapping is active ;)");
else
{
Serial::println("Mapping is not active");
goto failure;
}
flags = MMU::get_flags(address).release_value();
if (flags & MMU::ReadWrite) Serial::println("Mapping is writable");
if (flags & MMU::NoExecute) Serial::println("Mapping is not executable");
ptr = (u8*)address;
*ptr = 8;
Serial::println("Can write to pointer");
failure:
for (;;)
;
}