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| /*
| * 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
| cmpwi cr0,r3,0
| cmpwi 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)
|
|
