2 * Copyright (C) 2013 ARM Ltd.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 #ifndef __ASM_PERCPU_H
17 #define __ASM_PERCPU_H
19 static inline void set_my_cpu_offset(unsigned long off)
21 asm volatile("msr tpidr_el1, %0" :: "r" (off) : "memory");
24 static inline unsigned long __my_cpu_offset(void)
27 register unsigned long *sp asm ("sp");
30 * We want to allow caching the value, so avoid using volatile and
31 * instead use a fake stack read to hazard against barrier().
33 asm("mrs %0, tpidr_el1" : "=r" (off) : "Q" (*sp));
37 #define __my_cpu_offset __my_cpu_offset()
39 #include <asm-generic/percpu.h>
41 #endif /* __ASM_PERCPU_H */