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