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| /* 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
| cmpwi cr0,r3,0
| cmpwi 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
|
|
