| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) IBM Corporation, 2012 |
| 5 | * |
| 6 | * Author: Anton Blanchard <anton@au.ibm.com> |
| 7 | */ |
| 8 | #include <asm/ppc_asm.h> |
| 9 | #include <asm/vdso.h> |
| 10 | |
| 11 | .text |
| 12 | /* |
| 13 | * Exact prototype of getcpu |
| 14 | * |
| 15 | * int __kernel_getcpu(unsigned *cpu, unsigned *node); |
| 16 | * |
| 17 | */ |
| 18 | V_FUNCTION_BEGIN(__kernel_getcpu) |
| 19 | .cfi_startproc |
| 20 | mfspr r5,SPRN_SPRG_VDSO_READ |
| 21 | cmpwi cr0,r3,0 |
| 22 | cmpwi cr1,r4,0 |
| 23 | clrlwi r6,r5,16 |
| 24 | rlwinm r7,r5,16,31-15,31-0 |
| 25 | beq cr0,1f |
| 26 | stw r6,0(r3) |
| 27 | 1: beq cr1,2f |
| 28 | stw r7,0(r4) |
| 29 | 2: crclr cr0*4+so |
| 30 | li r3,0 /* always success */ |
| 31 | blr |
| 32 | .cfi_endproc |
| 33 | V_FUNCTION_END(__kernel_getcpu) |