1*4882a593Smuzhiyun /*******************************************************************
2*4882a593Smuzhiyun * This file is part of the Emulex Linux Device Driver for *
3*4882a593Smuzhiyun * Fibre Channel Host Bus Adapters. *
4*4882a593Smuzhiyun * Copyright (C) 2017-2018 Broadcom. All Rights Reserved. The term *
5*4882a593Smuzhiyun * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
6*4882a593Smuzhiyun * Copyright (C) 2004-2011 Emulex. All rights reserved. *
7*4882a593Smuzhiyun * EMULEX and SLI are trademarks of Emulex. *
8*4882a593Smuzhiyun * www.broadcom.com *
9*4882a593Smuzhiyun * *
10*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or *
11*4882a593Smuzhiyun * modify it under the terms of version 2 of the GNU General *
12*4882a593Smuzhiyun * Public License as published by the Free Software Foundation. *
13*4882a593Smuzhiyun * This program is distributed in the hope that it will be useful. *
14*4882a593Smuzhiyun * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
15*4882a593Smuzhiyun * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
16*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
17*4882a593Smuzhiyun * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
18*4882a593Smuzhiyun * TO BE LEGALLY INVALID. See the GNU General Public License for *
19*4882a593Smuzhiyun * more details, a copy of which can be found in the file COPYING *
20*4882a593Smuzhiyun * included with this package. *
21*4882a593Smuzhiyun *******************************************************************/
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun /*
24*4882a593Smuzhiyun * This file provides macros to aid compilation in the Linux 2.4 kernel
25*4882a593Smuzhiyun * over various platform architectures.
26*4882a593Smuzhiyun */
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun /*******************************************************************
29*4882a593Smuzhiyun Note: HBA's SLI memory contains little-endian LW.
30*4882a593Smuzhiyun Thus to access it from a little-endian host,
31*4882a593Smuzhiyun memcpy_toio() and memcpy_fromio() can be used.
32*4882a593Smuzhiyun However on a big-endian host, copy 4 bytes at a time,
33*4882a593Smuzhiyun using writel() and readl().
34*4882a593Smuzhiyun *******************************************************************/
35*4882a593Smuzhiyun #include <asm/byteorder.h>
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun #ifdef __BIG_ENDIAN
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun static inline void
lpfc_memcpy_to_slim(void __iomem * dest,void * src,unsigned int bytes)40*4882a593Smuzhiyun lpfc_memcpy_to_slim(void __iomem *dest, void *src, unsigned int bytes)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun uint32_t __iomem *dest32;
43*4882a593Smuzhiyun uint32_t *src32;
44*4882a593Smuzhiyun unsigned int four_bytes;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun dest32 = (uint32_t __iomem *) dest;
48*4882a593Smuzhiyun src32 = (uint32_t *) src;
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun /* write input bytes, 4 bytes at a time */
51*4882a593Smuzhiyun for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
52*4882a593Smuzhiyun writel( *src32, dest32);
53*4882a593Smuzhiyun readl(dest32); /* flush */
54*4882a593Smuzhiyun dest32++;
55*4882a593Smuzhiyun src32++;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun return;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun static inline void
lpfc_memcpy_from_slim(void * dest,void __iomem * src,unsigned int bytes)62*4882a593Smuzhiyun lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
63*4882a593Smuzhiyun {
64*4882a593Smuzhiyun uint32_t *dest32;
65*4882a593Smuzhiyun uint32_t __iomem *src32;
66*4882a593Smuzhiyun unsigned int four_bytes;
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun dest32 = (uint32_t *) dest;
70*4882a593Smuzhiyun src32 = (uint32_t __iomem *) src;
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun /* read input bytes, 4 bytes at a time */
73*4882a593Smuzhiyun for (four_bytes = bytes /4; four_bytes > 0; four_bytes--) {
74*4882a593Smuzhiyun *dest32 = readl( src32);
75*4882a593Smuzhiyun dest32++;
76*4882a593Smuzhiyun src32++;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun return;
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun #else
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun static inline void
lpfc_memcpy_to_slim(void __iomem * dest,void * src,unsigned int bytes)85*4882a593Smuzhiyun lpfc_memcpy_to_slim( void __iomem *dest, void *src, unsigned int bytes)
86*4882a593Smuzhiyun {
87*4882a593Smuzhiyun /* convert bytes in argument list to word count for copy function */
88*4882a593Smuzhiyun __iowrite32_copy(dest, src, bytes / sizeof(uint32_t));
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun static inline void
lpfc_memcpy_from_slim(void * dest,void __iomem * src,unsigned int bytes)92*4882a593Smuzhiyun lpfc_memcpy_from_slim( void *dest, void __iomem *src, unsigned int bytes)
93*4882a593Smuzhiyun {
94*4882a593Smuzhiyun /* actually returns 1 byte past dest */
95*4882a593Smuzhiyun memcpy_fromio( dest, src, bytes);
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun #endif /* __BIG_ENDIAN */
99