/* * This program 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 2 of the License, or * (at your option) any later version. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * 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)