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08dbd0f8ef
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 and only 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 write to the free software foundation inc 51 franklin street fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 94 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141334.043630402@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
80 lines
1.5 KiB
ArmAsm
80 lines
1.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* User memory copying routines for the Hexagon Kernel
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*
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* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
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*/
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/* The right way to do this involves valignb
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* The easy way to do this is only speed up src/dest similar alignment.
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*/
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/*
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* Copy to/from user are the same, except that for packets with a load and
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* a store, I don't know how to tell which kind of exception we got.
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* Therefore, we duplicate the function, and handle faulting addresses
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* differently for each function
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*/
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/*
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* copy to user: stores can fault
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*/
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#define src_sav r13
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#define dst_sav r12
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#define src_dst_sav r13:12
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#define d_dbuf r15:14
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#define w_dbuf r15
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#define dst r0
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#define src r1
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#define bytes r2
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#define loopcount r5
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#define FUNCNAME raw_copy_to_user
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#include "copy_user_template.S"
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/* STORE FAULTS from COPY_TO_USER */
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.falign
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1109:
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2109:
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4109:
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/* Alignment loop. r2 has been updated. Return it. */
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{
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r0 = r2
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jumpr r31
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}
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/* Normal copy loops. Use dst-dst_sav to compute distance */
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/* dst holds best write, no need to unwind any loops */
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/* X - (A - B) == X + B - A */
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.falign
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8189:
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8199:
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4189:
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4199:
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2189:
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2199:
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1189:
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1199:
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{
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r2 += sub(dst_sav,dst)
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}
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{
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r0 = r2
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jumpr r31
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}
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/* COPY TO USER: only stores can fail */
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.section __ex_table,"a"
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.long 1100b,1109b
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.long 2100b,2109b
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.long 4100b,4109b
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.long 8180b,8189b
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.long 8190b,8199b
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.long 4180b,4189b
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.long 4190b,4199b
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.long 2180b,2189b
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.long 2190b,2199b
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.long 1180b,1189b
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.long 1190b,1199b
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.previous
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