arch/ia64/include/asm/percpu.h

   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 */