[mirror_ubuntu-artful-kernel.git] / arch / arm64 / mm / proc-macros.S

/*
 * Based on arch/arm/mm/proc-macros.S
 *
 * Copyright (C) 2012 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/>.
 */

#include <asm/asm-offsets.h>
#include <asm/thread_info.h>

/*
 * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm)
 */
	.macro	vma_vm_mm, rd, rn
	ldr	\rd, [\rn, #VMA_VM_MM]
	.endm

/*
 * mmid - get context id from mm pointer (mm->context.id)
 */
	.macro	mmid, rd, rn
	ldr	\rd, [\rn, #MM_CONTEXT_ID]
	.endm

/*
 * dcache_line_size - get the minimum D-cache line size from the CTR register.
 */
	.macro	dcache_line_size, reg, tmp
	mrs	\tmp, ctr_el0			// read CTR
	ubfm	\tmp, \tmp, #16, #19		// cache line size encoding
	mov	\reg, #4			// bytes per word
	lsl	\reg, \reg, \tmp		// actual cache line size
	.endm

/*
 * icache_line_size - get the minimum I-cache line size from the CTR register.
 */
	.macro	icache_line_size, reg, tmp
	mrs	\tmp, ctr_el0			// read CTR
	and	\tmp, \tmp, #0xf		// cache line size encoding
	mov	\reg, #4			// bytes per word
	lsl	\reg, \reg, \tmp		// actual cache line size
	.endm
Commit	Line	Data
0be7320a CM	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
bd5f6dc3	41	ubfm \tmp, \tmp, #16, #19 // cache line size encoding
0be7320a CM	42	mov \reg, #4 // bytes per word
	43	lsl \reg, \reg, \tmp // actual cache line size
	44	.endm
	45
	46	/*
	47	* icache_line_size - get the minimum I-cache line size from the CTR register.
	48	*/
	49	.macro icache_line_size, reg, tmp
	50	mrs \tmp, ctr_el0 // read CTR
	51	and \tmp, \tmp, #0xf // cache line size encoding
	52	mov \reg, #4 // bytes per word
	53	lsl \reg, \reg, \tmp // actual cache line size
	54	.endm