Blame - arch/x86/boot/copy.S - kernel/msm-4.9

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H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	1	/* ----------------------------------------------------------------------- *
				2	*
				3	* Copyright (C) 1991, 1992 Linus Torvalds
				4	* Copyright 2007 rPath, Inc. - All Rights Reserved
				5	*
				6	* This file is part of the Linux kernel, and is made available under
				7	* the terms of the GNU General Public License version 2.
				8	*
				9	* ----------------------------------------------------------------------- */
				10
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	11	#include <linux/linkage.h>
				12
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	13	/*
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	14	* Memory copy routines
				15	*/
				16
				17	.code16gcc
				18	.text
				19
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	20	GLOBAL(memcpy)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	21	pushw %si
				22	pushw %di
				23	movw %ax, %di
				24	movw %dx, %si
				25	pushw %cx
				26	shrw $2, %cx
				27	rep; movsl
				28	popw %cx
				29	andw $3, %cx
				30	rep; movsb
				31	popw %di
				32	popw %si
				33	ret
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	34	ENDPROC(memcpy)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	35
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	36	GLOBAL(memset)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	37	pushw %di
				38	movw %ax, %di
				39	movzbl %dl, %eax
				40	imull $0x01010101,%eax
				41	pushw %cx
				42	shrw $2, %cx
				43	rep; stosl
				44	popw %cx
				45	andw $3, %cx
				46	rep; stosb
				47	popw %di
				48	ret
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	49	ENDPROC(memset)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	50
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	51	GLOBAL(copy_from_fs)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	52	pushw %ds
				53	pushw %fs
				54	popw %ds
				55	call memcpy
				56	popw %ds
				57	ret
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	58	ENDPROC(copy_from_fs)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	59
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	60	GLOBAL(copy_to_fs)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	61	pushw %es
				62	pushw %fs
				63	popw %es
				64	call memcpy
				65	popw %es
				66	ret
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	67	ENDPROC(copy_to_fs)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	68
				69	#if 0 /* Not currently used, but can be enabled as needed */
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	70	GLOBAL(copy_from_gs)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	71	pushw %ds
				72	pushw %gs
				73	popw %ds
				74	call memcpy
				75	popw %ds
				76	ret
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	77	ENDPROC(copy_from_gs)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	78
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	79	GLOBAL(copy_to_gs)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	80	pushw %es
				81	pushw %gs
				82	popw %es
				83	call memcpy
				84	popw %es
				85	ret
Cyrill Gorcunov	2f79555	2009-02-14 00:50:20 +0300	[diff] [blame]	86	ENDPROC(copy_to_gs)
H. Peter Anvin	5be8656	2007-07-11 12:18:41 -0700	[diff] [blame]	87	#endif