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 */
54