| /* SPDX-License-Identifier: GPL-2.0-or-later */ | |
| /* | |
| * | |
| * 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); | |
| * | |
| */ | |
| #if defined(CONFIG_PPC64) | |
| V_FUNCTION_BEGIN(__kernel_getcpu) | |
| .cfi_startproc | |
| mfspr r5,SPRN_SPRG_VDSO_READ | |
| PPC_LCMPI cr0,r3,0 | |
| PPC_LCMPI cr1,r4,0 | |
| clrlwi r6,r5,16 | |
| rlwinm r7,r5,16,31-15,31-0 | |
| beq cr0,1f | |
| stw r6,0(r3) | |
| 1: crclr cr0*4+so | |
| li r3,0 /* always success */ | |
| beqlr cr1 | |
| stw r7,0(r4) | |
| blr | |
| .cfi_endproc | |
| V_FUNCTION_END(__kernel_getcpu) | |
| #elif !defined(CONFIG_SMP) | |
| V_FUNCTION_BEGIN(__kernel_getcpu) | |
| .cfi_startproc | |
| cmpwi cr0, r3, 0 | |
| cmpwi cr1, r4, 0 | |
| li r5, 0 | |
| beq cr0, 1f | |
| stw r5, 0(r3) | |
| 1: li r3, 0 /* always success */ | |
| crclr cr0*4+so | |
| beqlr cr1 | |
| stw r5, 0(r4) | |
| blr | |
| .cfi_endproc | |
| V_FUNCTION_END(__kernel_getcpu) | |
| #endif |