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 28 struct mm_struct; 29 struct cpu_suspend_ctx; 30 31 extern void cpu_cache_off(void); 32 extern void cpu_do_idle(void); 33 extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm); 34 extern void cpu_reset(unsigned long addr) __attribute__((noreturn)); 35 extern void cpu_do_suspend(struct cpu_suspend_ctx *ptr); 36 extern u64 cpu_do_resume(phys_addr_t ptr, u64 idmap_ttbr); 37 38 #include <asm/memory.h> 39 40 #define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm) 41 42 #define cpu_get_pgd() \ 43 ({ \ 44 unsigned long pg; \ 45 asm("mrs %0, ttbr0_el1\n" \ 46 : "=r" (pg)); \ 47 pg &= ~0xffff000000003ffful; \ 48 (pgd_t *)phys_to_virt(pg); \ 49 }) 50 51 #endif /* __ASSEMBLY__ */ 52 #endif /* __KERNEL__ */ 53 #endif /* __ASM_PROCFNS_H */ 54