#include <cpu.hpp>
#include <memory.hpp>

namespace CPU
{
	void Pause()
	{
#if defined(__amd64__) || defined(__i386__)
		asmv("pause");
#elif defined(__aarch64__)
		asmv("yield");
#endif
	}

	void Halt()
	{
#if defined(__amd64__) || defined(__i386__)
		asmv("hlt");
#elif defined(__aarch64__)
		asmv("wfe");
#endif
	}

	bool Interrupts(InterruptsType Type)
	{
		switch (Type)
		{
		case Check:
		{
#if defined(__amd64__) || defined(__i386__)
			uint64_t rflags;
			asmv("pushfq");
			asmv("popq %0"
				 : "=r"(rflags));
			return rflags & (1 << 9);
#elif defined(__aarch64__)
			uint64_t daif;
			asmv("mrs %0, daif"
				 : "=r"(daif));
			return !(daif & (1 << 2));
#endif
		}
		case Enable:
		{
#if defined(__amd64__) || defined(__i386__)
			asmv("sti");
#elif defined(__aarch64__)
			asmv("msr daifclr, #2");
#endif
			return true;
		}
		case Disable:
		{
#if defined(__amd64__) || defined(__i386__)
			asmv("cli");
#elif defined(__aarch64__)
			asmv("msr daifset, #2");
#endif
			return true;
		}
		}
		return false;
	}

	void *PageTable(void *PT)
	{
#if defined(__amd64__) || defined(__i386__)
		if (PT)
			asmv("movq %0, %%cr3"
				 :
				 : "r"(PT));
		else
			asmv("movq %%cr3, %0"
				 : "=r"(PT));
#elif defined(__aarch64__)
		if (PT)
			asmv("msr ttbr0_el1, %0"
				 :
				 : "r"(PT));
		else
			asmv("mrs %0, ttbr0_el1"
				 : "=r"(PT));
#endif
		return PT;
	}
}