/*
 *  linux/arch/arm/lib/copy_to_user.S
 *
 *  Author:	Nicolas Pitre
 *  Created:	Sep 29, 2005
 *  Copyright:	MontaVista Software, Inc.
 *
 *  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.
 */

#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/unwind.h>

/*
 * Prototype:
 *
 *	size_t arm_copy_to_user(void *to, const void *from, size_t n)
 *
 * Purpose:
 *
 *	copy a block to user memory from kernel memory
 *
 * Params:
 *
 *	to = user memory
 *	from = kernel memory
 *	n = number of bytes to copy
 *
 * Return value:
 *
 *	Number of bytes NOT copied.
 */

#define LDR1W_SHIFT	0
#ifndef CONFIG_THUMB2_KERNEL
#define STR1W_SHIFT	0
#else
#define STR1W_SHIFT	1
#endif

	.macro ldr1w ptr reg abort
	W(ldr) \reg, [\ptr], #4
	.endm

	.macro ldr4w ptr reg1 reg2 reg3 reg4 abort
	ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4}
	.endm

	.macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
	ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
	.endm

	.macro ldr1b ptr reg cond=al abort
	ldr\cond\()b \reg, [\ptr], #1
	.endm

	.macro str1w ptr reg abort
	strusr	\reg, \ptr, 4, abort=\abort
	.endm

	.macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
	str1w \ptr, \reg1, \abort
	str1w \ptr, \reg2, \abort
	str1w \ptr, \reg3, \abort
	str1w \ptr, \reg4, \abort
	str1w \ptr, \reg5, \abort
	str1w \ptr, \reg6, \abort
	str1w \ptr, \reg7, \abort
	str1w \ptr, \reg8, \abort
	.endm

	.macro str1b ptr reg cond=al abort
	strusr	\reg, \ptr, 1, \cond, abort=\abort
	.endm

	.macro enter reg1 reg2
	mov	r3, #0
	stmdb	sp!, {r0, r2, r3, \reg1, \reg2}
	.endm

	.macro usave reg1 reg2
	UNWIND(	.save {r0, r2, r3, \reg1, \reg2}	)
	.endm

	.macro exit reg1 reg2
	add	sp, sp, #8
	ldmfd	sp!, {r0, \reg1, \reg2}
	.endm

	.text

ENTRY(__copy_to_user_std)
WEAK(arm_copy_to_user)

#include "copy_template.S"

ENDPROC(arm_copy_to_user)
ENDPROC(__copy_to_user_std)

	.pushsection .text.fixup,"ax"
	.align 0
	copy_abort_preamble
	ldmfd	sp!, {r1, r2, r3}
	sub	r0, r0, r1
	rsb	r0, r0, r2
	copy_abort_end
	.popsection

id=ca92e6c7e6329029d7188487a5c32e86ef471977'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/tools/perf/tests/sw-clock.c'>
<input type='hidden' name='id' value='ca92e6c7e6329029d7188487a5c32e86ef471977'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>perf</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/tests?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>tests</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/tests/sw-clock.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>sw-clock.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='ca92e6c7e6329029d7188487a5c32e86ef471977'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-18 11:13:41 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-18 11:13:41 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/tests/sw-clock.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>ca92e6c7e6329029d7188487a5c32e86ef471977</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/tests/sw-clock.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>704fb5c2ca533cdb569826522eed0dbbcf31f316</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/perf/tests/sw-clock.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>tools/perf/tests/sw-clock.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/tests/sw-clock.c?id=0b75f821ec8be459dd4dec77be39595d989d77ac'>0b75f821ec8be459dd4dec77be39595d989d77ac</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/tests/sw-clock.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977&amp;id2=0b75f821ec8be459dd4dec77be39595d989d77ac'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/tests/sw-clock.c?id=4205e4786d0b9fc3b4fec7b1910cf645a0468307'>4205e4786d0b9fc3b4fec7b1910cf645a0468307</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/tests/sw-clock.c?id=ca92e6c7e6329029d7188487a5c32e86ef471977&amp;id2=4205e4786d0b9fc3b4fec7b1910cf645a0468307'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</div><div class='commit-msg'>Pull SMP hotplug update from Thomas Gleixner:
 "This contains a trivial typo fix and an extension to the core code for
  dynamically allocating states in the prepare stage.

  The extension is necessary right now because we need a proper way to
  unbreak LTTNG, which iscurrently non functional due to the removal of
  the notifiers. Surely it's out of tree, but it's widely used by
  distros.

  The simple solution would have been to reserve a state for LTTNG, but
  I'm not fond about unused crap in the kernel and the dynamic range,
  which we admittedly should have done right away, allows us to remove
  quite some of the hardcoded states, i.e. those which have no ordering
  requirements. So doing the right thing now is better than having an
  smaller intermediate solution which needs to be reworked anyway"

* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  cpu/hotplug: Provide dynamic range for prepare stage
  perf/x86/amd/ibs: Fix typo after cleanup state names in cpu/hotplug
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=ca92e6c7e6329029d7188487a5c32e86ef471977'>Diffstat</a> (limited to 'tools/perf/tests/sw-clock.c')</div><table summary='diffstat' class='diffstat'>