mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-13 00:11:16 +01:00
64 lines
1.7 KiB
ArmAsm
64 lines
1.7 KiB
ArmAsm
/*
|
|
* Copyright (c) Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope 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 this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/* ams::kern::arch::arm64::cpu::SynchronizeAllCoresImpl(int *sync_var, int num_cores) */
|
|
.section .text._ZN3ams4kern4arch5arm643cpu23SynchronizeAllCoresImplEPii, "ax", %progbits
|
|
.global _ZN3ams4kern4arch5arm643cpu23SynchronizeAllCoresImplEPii
|
|
.type _ZN3ams4kern4arch5arm643cpu23SynchronizeAllCoresImplEPii, %function
|
|
_ZN3ams4kern4arch5arm643cpu23SynchronizeAllCoresImplEPii:
|
|
/* Loop until the sync var is less than num cores. */
|
|
sevl
|
|
1:
|
|
wfe
|
|
ldaxr w2, [x0]
|
|
cmp w2, w1
|
|
b.gt 1b
|
|
|
|
/* Increment the sync var. */
|
|
2:
|
|
ldaxr w2, [x0]
|
|
add w3, w2, #1
|
|
stlxr w4, w3, [x0]
|
|
cbnz w4, 2b
|
|
|
|
/* Loop until the sync var matches our ticket. */
|
|
add w3, w2, w1
|
|
sevl
|
|
3:
|
|
wfe
|
|
ldaxr w2, [x0]
|
|
cmp w2, w3
|
|
b.ne 3b
|
|
|
|
/* Check if the ticket is the last. */
|
|
sub w2, w1, #1
|
|
add w2, w2, w1
|
|
cmp w3, w2
|
|
b.eq 5f
|
|
|
|
/* Our ticket is not the last one. Increment. */
|
|
4:
|
|
ldaxr w2, [x0]
|
|
add w3, w2, #1
|
|
stlxr w4, w3, [x0]
|
|
cbnz w4, 4b
|
|
ret
|
|
|
|
/* Our ticket is the last one. */
|
|
5:
|
|
stlr wzr, [x0]
|
|
ret
|