1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
15 *
16 * Copyright (C) IBM Corporation, 2012
17 *
18 * Author: Anton Blanchard <anton@au.ibm.com>
19 */
20#include <asm/ppc_asm.h>
21#include <asm/vdso.h>
22
23	.text
24/*
25 * Exact prototype of getcpu
26 *
27 * int __kernel_getcpu(unsigned *cpu, unsigned *node);
28 *
29 */
30V_FUNCTION_BEGIN(__kernel_getcpu)
31  .cfi_startproc
32	mfspr	r5,SPRN_SPRG_VDSO_READ
33	cmpdi	cr0,r3,0
34	cmpdi	cr1,r4,0
35	clrlwi  r6,r5,16
36	rlwinm  r7,r5,16,31-15,31-0
37	beq	cr0,1f
38	stw	r6,0(r3)
391:	beq	cr1,2f
40	stw	r7,0(r4)
412:	crclr	cr0*4+so
42	li	r3,0			/* always success */
43	blr
44  .cfi_endproc
45V_FUNCTION_END(__kernel_getcpu)
46