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 */