linux-next/arch/arm64/lib/clear_page.S

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2012 ARM Ltd.
 */

#include <linux/linkage.h>
#include <linux/const.h>
#include <asm/assembler.h>
#include <asm/page.h>

/*
 * Clear page @dest
 *
 * Parameters:
 *	x0 - dest
 */
ENTRY(clear_page)
	mrs	x1, dczid_el0
	and	w1, w1, #0xf
	mov	x2, #4
	lsl	x1, x2, x1

1:	dc	zva, x0
	add	x0, x0, x1
	tst	x0, #(PAGE_SIZE - 1)
	b.ne	1b
	ret
ENDPROC(clear_page)
EXPORT_SYMBOL(clear_page)
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 503 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Enrico Weigelt <info@metux.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2019-06-03 13:44:50 +08:00			`/* SPDX-License-Identifier: GPL-2.0-only */`
arm64: Miscellaneous library functions This patch adds udelay, memory and bit operations together with the ksyms exports. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> 2012-03-05 19:49:33 +08:00			`/*`
			`* Copyright (C) 2012 ARM Ltd.`
			`*/`

			`#include <linux/linkage.h>`
			`#include <linux/const.h>`
			`#include <asm/assembler.h>`
			`#include <asm/page.h>`

			`/*`
			`* Clear page @dest`
			`*`
			`* Parameters:`
			`* x0 - dest`
			`*/`
			`ENTRY(clear_page)`
			`mrs x1, dczid_el0`
			`and w1, w1, #0xf`
			`mov x2, #4`
			`lsl x1, x2, x1`

			`1: dc zva, x0`
			`add x0, x0, x1`
			`tst x0, #(PAGE_SIZE - 1)`
			`b.ne 1b`
			`ret`
			`ENDPROC(clear_page)`
arm64: page: use asm EXPORT_SYMBOL() For a while now it's been possible to use EXPORT_SYMBOL() in assembly files, which allows us to place exports immediately after assembly functions, as we do for C functions. As a step towards removing arm64ksyms.c, let's move the copy_page and clear_page exports to the assembly files the functions are defined in. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> 2018-12-08 02:08:19 +08:00			`EXPORT_SYMBOL(clear_page)`