| Anton Blanchard | 18ad51d | 2012-07-04 20:37:11 +0000 | [diff] [blame] | 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 | */ |
| 30 | V_FUNCTION_BEGIN(__kernel_getcpu) |
| 31 | .cfi_startproc |
| 32 | mfspr r5,SPRN_USPRG3 |
| 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) |
| 39 | 1: beq cr1,2f |
| 40 | stw r7,0(r4) |
| 41 | 2: crclr cr0*4+so |
| 42 | li r3,0 /* always success */ |
| 43 | blr |
| 44 | .cfi_endproc |
| 45 | V_FUNCTION_END(__kernel_getcpu) |