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33 lines
614 B
33 lines
614 B
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* |
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* Copyright (C) IBM Corporation, 2012 |
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* |
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* Author: Anton Blanchard <anton@au.ibm.com> |
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*/ |
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#include <asm/ppc_asm.h> |
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#include <asm/vdso.h> |
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.text |
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/* |
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* Exact prototype of getcpu |
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* |
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* int __kernel_getcpu(unsigned *cpu, unsigned *node); |
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* |
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*/ |
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V_FUNCTION_BEGIN(__kernel_getcpu) |
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.cfi_startproc |
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mfspr r5,SPRN_SPRG_VDSO_READ |
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cmpdi cr0,r3,0 |
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cmpdi cr1,r4,0 |
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clrlwi r6,r5,16 |
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rlwinm r7,r5,16,31-15,31-0 |
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beq cr0,1f |
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stw r6,0(r3) |
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1: beq cr1,2f |
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stw r7,0(r4) |
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2: crclr cr0*4+so |
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li r3,0 /* always success */ |
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blr |
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.cfi_endproc |
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V_FUNCTION_END(__kernel_getcpu)
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