;=----------------------------------------------------------------------------=;
;                            OS on Kaleid                                      ;
;                                                                              ;
;   Desc: Interrupt Descriptor Table 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/>.             ;
;=----------------------------------------------------------------------------=;

[BITS 64]

global MmLoadGdt
global MmStoreGdt

;;
;; Loads the GDT
;;
MmLoadGdt:
    ;; Loading the gdt via the gdtPtr pointer
    lgdt [rdi]
    mov ax, si
    ltr ax

    ;; We must far jump because we changed the GDT
    lea rax, [.next]
    push rax
    ret
.next:
    ;ltr dx                  ; the TSS
    ret

;;
;; Stores the GDT
;;
MmStoreGdt:
    ;; Loading the gdt via the gdtPtr pointer
    sgdt [rdi]
    ret