.globl write_cr3
.globl write_cr0
.globl read_cr2
.globl read_cr3
.globl read_cr0
.globl flush_tlb

.section .text
    flush_tlb:
        mov %rsi, %cr3
        mov %cr3, %rsi
        xor %rax, %rax
        ret

    read_cr3:
        movq %rax, %cr3
        ret

    read_cr0:
        movq %rax, %cr0
        ret

    read_cr2:
        movq %rax, %cr2
        ret

    write_cr3:
        movq %cr3, %rdi
        ret

    write_cr0:
        movq %cr0, %rdi
        ret