LXR linux/arch/arm64/include/asm/proc-fns.h

   1/*
   2 * Based on arch/arm/include/asm/proc-fns.h
   3 *
   4 * Copyright (C) 1997-1999 Russell King
   5 * Copyright (C) 2000 Deep Blue Solutions Ltd
   6 * Copyright (C) 2012 ARM Ltd.
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20#ifndef __ASM_PROCFNS_H
  21#define __ASM_PROCFNS_H
  22
  23#ifdef __KERNEL__
  24#ifndef __ASSEMBLY__
  25
  26#include <asm/page.h>
  27
  28struct mm_struct;
  29
  30extern void cpu_cache_off(void);
  31extern void cpu_do_idle(void);
  32extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm);
  33extern void cpu_reset(unsigned long addr) __attribute__((noreturn));
  34
  35#include <asm/memory.h>
  36
  37#define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
  38
  39#define cpu_get_pgd()                                   \
  40({                                                      \
  41        unsigned long pg;                               \
  42        asm("mrs        %0, ttbr0_el1\n"                \
  43            : "=r" (pg));                               \
  44        pg &= ~0xffff000000003ffful;                    \
  45        (pgd_t *)phys_to_virt(pg);                      \
  46})
  47
  48#endif /* __ASSEMBLY__ */
  49#endif /* __KERNEL__ */
  50#endif /* __ASM_PROCFNS_H */
  51