| /* 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) |
