projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 18ad51dd AB |
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 | |
| 9d378dfa | 32 | mfspr r5,SPRN_SPRG_VDSO_READ |
| 18ad51dd AB |
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) |