~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/arm/include/asm/percpu.h

Version: ~ [ linux-5.4-rc7 ] ~ [ linux-5.3.11 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.84 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.154 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.201 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.201 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.77 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Copyright 2012 Calxeda, Inc.
  3  *
  4  * This program is free software; you can redistribute it and/or modify it
  5  * under the terms and conditions of the GNU General Public License,
  6  * version 2, as published by the Free Software Foundation.
  7  *
  8  * This program is distributed in the hope it will be useful, but WITHOUT
  9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 11  * more details.
 12  *
 13  * You should have received a copy of the GNU General Public License along with
 14  * this program.  If not, see <http://www.gnu.org/licenses/>.
 15  */
 16 #ifndef _ASM_ARM_PERCPU_H_
 17 #define _ASM_ARM_PERCPU_H_
 18 
 19 /*
 20  * Same as asm-generic/percpu.h, except that we store the per cpu offset
 21  * in the TPIDRPRW. TPIDRPRW only exists on V6K and V7
 22  */
 23 #if defined(CONFIG_SMP) && !defined(CONFIG_CPU_V6)
 24 static inline void set_my_cpu_offset(unsigned long off)
 25 {
 26         /* Set TPIDRPRW */
 27         asm volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (off) : "memory");
 28 }
 29 
 30 static inline unsigned long __my_cpu_offset(void)
 31 {
 32         unsigned long off;
 33         register unsigned long *sp asm ("sp");
 34 
 35         /*
 36          * Read TPIDRPRW.
 37          * We want to allow caching the value, so avoid using volatile and
 38          * instead use a fake stack read to hazard against barrier().
 39          */
 40         asm("mrc p15, 0, %0, c13, c0, 4" : "=r" (off) : "Q" (*sp));
 41 
 42         return off;
 43 }
 44 #define __my_cpu_offset __my_cpu_offset()
 45 #else
 46 #define set_my_cpu_offset(x)    do {} while(0)
 47 
 48 #endif /* CONFIG_SMP */
 49 
 50 #include <asm-generic/percpu.h>
 51 
 52 #endif /* _ASM_ARM_PERCPU_H_ */
 53 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp