162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef _ASM_IA64_PERCPU_H 362306a36Sopenharmony_ci#define _ASM_IA64_PERCPU_H 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci/* 662306a36Sopenharmony_ci * Copyright (C) 2002-2003 Hewlett-Packard Co 762306a36Sopenharmony_ci * David Mosberger-Tang <davidm@hpl.hp.com> 862306a36Sopenharmony_ci */ 962306a36Sopenharmony_ci 1062306a36Sopenharmony_ci#ifdef __ASSEMBLY__ 1162306a36Sopenharmony_ci# define THIS_CPU(var) (var) /* use this to mark accesses to per-CPU variables... */ 1262306a36Sopenharmony_ci#else /* !__ASSEMBLY__ */ 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci#include <linux/threads.h> 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci#ifdef CONFIG_SMP 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci#ifdef HAVE_MODEL_SMALL_ATTRIBUTE 2062306a36Sopenharmony_ci# define PER_CPU_ATTRIBUTES __attribute__((__model__ (__small__))) 2162306a36Sopenharmony_ci#endif 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci#define __my_cpu_offset __ia64_per_cpu_var(local_per_cpu_offset) 2462306a36Sopenharmony_ci 2562306a36Sopenharmony_ciextern void *per_cpu_init(void); 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ci#else /* ! SMP */ 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci#define per_cpu_init() (__phys_per_cpu_start) 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ci#endif /* SMP */ 3262306a36Sopenharmony_ci 3362306a36Sopenharmony_ci#define PER_CPU_BASE_SECTION ".data..percpu" 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ci/* 3662306a36Sopenharmony_ci * Be extremely careful when taking the address of this variable! Due to virtual 3762306a36Sopenharmony_ci * remapping, it is different from the canonical address returned by this_cpu_ptr(&var)! 3862306a36Sopenharmony_ci * On the positive side, using __ia64_per_cpu_var() instead of this_cpu_ptr() is slightly 3962306a36Sopenharmony_ci * more efficient. 4062306a36Sopenharmony_ci */ 4162306a36Sopenharmony_ci#define __ia64_per_cpu_var(var) (*({ \ 4262306a36Sopenharmony_ci __verify_pcpu_ptr(&(var)); \ 4362306a36Sopenharmony_ci ((typeof(var) __kernel __force *)&(var)); \ 4462306a36Sopenharmony_ci})) 4562306a36Sopenharmony_ci 4662306a36Sopenharmony_ci#include <asm-generic/percpu.h> 4762306a36Sopenharmony_ci 4862306a36Sopenharmony_ci/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */ 4962306a36Sopenharmony_ciDECLARE_PER_CPU(unsigned long, local_per_cpu_offset); 5062306a36Sopenharmony_ci 5162306a36Sopenharmony_ci#endif /* !__ASSEMBLY__ */ 5262306a36Sopenharmony_ci 5362306a36Sopenharmony_ci#endif /* _ASM_IA64_PERCPU_H */ 54