;=----------------------------------------------------------------------------=;
;                            OS on Kaleid                                      ;
;                                                                              ;
;   Desc:  Paging related functions                                            ;
;                                                                              ;
;                                                                              ;
;   Copyright © 2018-2020 The OS/K Team                                        ;
;                                                                              ;
;   This file is part of OS/K.                                                 ;
;                                                                              ;
;   OS/K is free software: you can redistribute it and/or modify               ;
;   it under the terms of the GNU General Public License as published by       ;
;   the Free Software Foundation, either version 3 of the License, or          ;
;   (at your option) any later version.                                        ;
;                                                                              ;
;   OS/K is distributed in the hope that it will be useful,                    ;
;   but WITHOUT ANY WARRANTY; without even the implied warranty of             ;
;   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              ;
;   GNU General Public License for more details.                               ;
;                                                                              ;
;   You should have received a copy of the GNU General Public License          ;
;   along with OS/K.  If not, see <https://www.gnu.org/licenses/>.             ;
;=----------------------------------------------------------------------------=;

global MmEnableWriteProtect
global MmDisableWriteProtect
global MmLoadPML4

MmEnableWriteProtect:
    push rax
    mov rax, cr0
    or rax, 1<<16
    mov cr0, rax
    pop rax
    ret

MmDisableWriteProtect:
    push rax
    mov rax, cr0
    and rax, ~(1<<16)
    mov cr0, rax
    pop rax
    ret

MmLoadPML4:
    push rax
    mov rax, rdi
    mov cr3, rax
    pop rax
    ret