00797360b5
Summary: POWER architecture CPUs (Book-S) require natural alignment for cache-inhibited storage accesses. Since we can't know the caching model for a page ahead of time, always enforce natural alignment in memcpy. This fixes a SIGBUS in X with acceleration enabled on POWER9. As part of this, revert r358672, it's no longer necessary with this fix. Regression tested by alfredo. Reviewed by: alfredo Differential Revision: https://reviews.freebsd.org/D23969
67 lines
2.3 KiB
ArmAsm
67 lines
2.3 KiB
ArmAsm
/*-
|
|
* Copyright (c) 2018 Instituto de Pesquisas Eldorado
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the author nor the names of its contributors may
|
|
* be used to endorse or promote products derived from this software
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#define FN_NAME __memcpy_vsx
|
|
#define BLOCK_BITS 6
|
|
#define ALIGN_MASK 0xf
|
|
|
|
/*
|
|
* r5: bytes to copy (multiple of BLOCK_BYTES)
|
|
*
|
|
*/
|
|
#define FN_COPY_LOOP \
|
|
/* Load CTR with number of blocks */ \
|
|
srdi %r5, %r5, BLOCK_BITS ;\
|
|
mtctr %r5 ;\
|
|
/* Prepare indexes to load and store data */ \
|
|
xor %r6, %r6, %r6 ;\
|
|
li %r9, 16 ;\
|
|
li %r10, 32 ;\
|
|
li %r11, 48 ;\
|
|
.Lcopy_vsx_loop: \
|
|
lxvd2x %vs6, %r6, %r4 ;\
|
|
lxvd2x %vs7, %r9, %r4 ;\
|
|
lxvd2x %vs8, %r10, %r4 ;\
|
|
lxvd2x %vs9, %r11, %r4 ;\
|
|
stxvd2x %vs6, %r6, %r3 ;\
|
|
stxvd2x %vs7, %r9, %r3 ;\
|
|
stxvd2x %vs8, %r10, %r3 ;\
|
|
stxvd2x %vs9, %r11, %r3 ;\
|
|
\
|
|
addi %r3, %r3, BLOCK_BYTES ;\
|
|
addi %r4, %r4, BLOCK_BYTES ;\
|
|
bdnz .Lcopy_vsx_loop ;\
|
|
\
|
|
/* Check if there is remaining bytes */ \
|
|
cmpd %r7, 0 ;\
|
|
beq .Lexit ;\
|
|
|
|
#include "memcpy.S"
|