1/* 2 * Based on arch/arm/mm/proc-macros.S 3 * 4 * Copyright (C) 2012 ARM Ltd. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19#include <asm/asm-offsets.h> 20#include <asm/thread_info.h> 21 22/* 23 * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm) 24 */ 25 .macro vma_vm_mm, rd, rn 26 ldr \rd, [\rn, #VMA_VM_MM] 27 .endm 28 29/* 30 * mmid - get context id from mm pointer (mm->context.id) 31 */ 32 .macro mmid, rd, rn 33 ldr \rd, [\rn, #MM_CONTEXT_ID] 34 .endm 35 36/* 37 * dcache_line_size - get the minimum D-cache line size from the CTR register. 38 */ 39 .macro dcache_line_size, reg, tmp 40 mrs \tmp, ctr_el0 // read CTR 41 lsr \tmp, \tmp, #16 42 and \tmp, \tmp, #0xf // cache line size encoding 43 mov \reg, #4 // bytes per word 44 lsl \reg, \reg, \tmp // actual cache line size 45 .endm 46 47/* 48 * icache_line_size - get the minimum I-cache line size from the CTR register. 49 */ 50 .macro icache_line_size, reg, tmp 51 mrs \tmp, ctr_el0 // read CTR 52 and \tmp, \tmp, #0xf // cache line size encoding 53 mov \reg, #4 // bytes per word 54 lsl \reg, \reg, \tmp // actual cache line size 55 .endm 56