mirror of
https://gitlab.os-k.eu/os-k-team/os-k.git
synced 2023-08-25 14:03:10 +02:00
52 lines
2.3 KiB
NASM
52 lines
2.3 KiB
NASM
;=----------------------------------------------------------------------------=;
|
|
; OS on Kaleid ;
|
|
; ;
|
|
; Desc: CPU management 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 divideByZero
|
|
global KeActivateSSE
|
|
|
|
%include "kaleid/kernel/ke/cpuf.inc"
|
|
|
|
;;
|
|
;; Bug test
|
|
;;
|
|
divideByZero:
|
|
ret
|
|
|
|
;;
|
|
;; Activating SSE
|
|
;;
|
|
KeActivateSSE:
|
|
push rax
|
|
mov rax, cr0
|
|
and ax, 0xFFFB ;clear coprocessor emulation CR0.EM
|
|
or ax, 0x2 ;set coprocessor monitoring CR0.MP
|
|
mov cr0, rax
|
|
mov rax, cr4
|
|
or ax, 3 << 9 ;set CR4.OSFXSR and CR4.OSXMMEXCPT at the same time
|
|
mov cr4, rax
|
|
pop rax
|
|
ret
|