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- /* SPDX-License-Identifier: GPL-2.0-or-later */
- /*
- *
- * Copyright (C) IBM Corporation, 2012
- *
- * Author: Anton Blanchard <[email protected]>
- */
- #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
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