| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _ASM_IA64_PERCPU_H |
| 3 | #define _ASM_IA64_PERCPU_H |
| 4 | |
| 5 | /* |
| 6 | * Copyright (C) 2002-2003 Hewlett-Packard Co |
| 7 | * David Mosberger-Tang <davidm@hpl.hp.com> |
| 8 | */ |
| 9 | |
| 10 | #ifdef __ASSEMBLY__ |
| 11 | # define THIS_CPU(var) (var) /* use this to mark accesses to per-CPU variables... */ |
| 12 | #else /* !__ASSEMBLY__ */ |
| 13 | |
| 14 | |
| 15 | #include <linux/threads.h> |
| 16 | |
| 17 | #ifdef CONFIG_SMP |
| 18 | |
| 19 | #ifdef HAVE_MODEL_SMALL_ATTRIBUTE |
| 20 | # define PER_CPU_ATTRIBUTES __attribute__((__model__ (__small__))) |
| 21 | #endif |
| 22 | |
| 23 | #define __my_cpu_offset __ia64_per_cpu_var(local_per_cpu_offset) |
| 24 | |
| 25 | extern void *per_cpu_init(void); |
| 26 | |
| 27 | #else /* ! SMP */ |
| 28 | |
| 29 | #define per_cpu_init() (__phys_per_cpu_start) |
| 30 | |
| 31 | #endif /* SMP */ |
| 32 | |
| 33 | #define PER_CPU_BASE_SECTION ".data..percpu" |
| 34 | |
| 35 | /* |
| 36 | * Be extremely careful when taking the address of this variable! Due to virtual |
| 37 | * remapping, it is different from the canonical address returned by this_cpu_ptr(&var)! |
| 38 | * On the positive side, using __ia64_per_cpu_var() instead of this_cpu_ptr() is slightly |
| 39 | * more efficient. |
| 40 | */ |
| 41 | #define __ia64_per_cpu_var(var) (*({ \ |
| 42 | __verify_pcpu_ptr(&(var)); \ |
| 43 | ((typeof(var) __kernel __force *)&(var)); \ |
| 44 | })) |
| 45 | |
| 46 | #include <asm-generic/percpu.h> |
| 47 | |
| 48 | /* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */ |
| 49 | DECLARE_PER_CPU(unsigned long, local_per_cpu_offset); |
| 50 | |
| 51 | #endif /* !__ASSEMBLY__ */ |
| 52 | |
| 53 | #endif /* _ASM_IA64_PERCPU_H */ |