/* SPDX-License-Identifier: GPL-2.0-or-later */ | |
/* | |
* | |
* Copyright (C) IBM Corporation, 2012 | |
* | |
* Author: Anton Blanchard <anton@au.ibm.com> | |
*/ | |
#include <asm/ppc_asm.h> | |
#include <asm/vdso.h> | |
.text | |
/* | |
* Exact prototype of getcpu | |
* | |
* int __kernel_getcpu(unsigned *cpu, unsigned *node); | |
* | |
*/ | |
V_FUNCTION_BEGIN(__kernel_getcpu) | |
.cfi_startproc | |
mfspr r5,SPRN_SPRG_VDSO_READ | |
cmpdi cr0,r3,0 | |
cmpdi cr1,r4,0 | |
clrlwi r6,r5,16 | |
rlwinm r7,r5,16,31-15,31-0 | |
beq cr0,1f | |
stw r6,0(r3) | |
1: beq cr1,2f | |
stw r7,0(r4) | |
2: crclr cr0*4+so | |
li r3,0 /* always success */ | |
blr | |
.cfi_endproc | |
V_FUNCTION_END(__kernel_getcpu) |