1 /*
2 * I/O access functions for Hexagon
3 *
4 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 and
8 * only version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 * 02110-1301, USA.
19 */
20
21 #include <asm/io.h>
22
23 /* These are all FIFO routines! */
24
25 /*
26 * __raw_readsw - read words a short at a time
27 * @addr: source address
28 * @data: data address
29 * @len: number of shorts to read
30 */
__raw_readsw(const void __iomem * addr,void * data,int len)31 void __raw_readsw(const void __iomem *addr, void *data, int len)
32 {
33 const volatile short int *src = (short int *) addr;
34 short int *dst = (short int *) data;
35
36 if ((u32)data & 0x1)
37 panic("unaligned pointer to readsw");
38
39 while (len-- > 0)
40 *dst++ = *src;
41
42 }
43
44 /*
45 * __raw_writesw - read words a short at a time
46 * @addr: source address
47 * @data: data address
48 * @len: number of shorts to read
49 */
__raw_writesw(void __iomem * addr,const void * data,int len)50 void __raw_writesw(void __iomem *addr, const void *data, int len)
51 {
52 const short int *src = (short int *)data;
53 volatile short int *dst = (short int *)addr;
54
55 if ((u32)data & 0x1)
56 panic("unaligned pointer to writesw");
57
58 while (len-- > 0)
59 *dst = *src++;
60
61
62 }
63
64 /* Pretty sure len is pre-adjusted for the length of the access already */
__raw_readsl(const void __iomem * addr,void * data,int len)65 void __raw_readsl(const void __iomem *addr, void *data, int len)
66 {
67 const volatile long *src = (long *) addr;
68 long *dst = (long *) data;
69
70 if ((u32)data & 0x3)
71 panic("unaligned pointer to readsl");
72
73 while (len-- > 0)
74 *dst++ = *src;
75
76
77 }
78
__raw_writesl(void __iomem * addr,const void * data,int len)79 void __raw_writesl(void __iomem *addr, const void *data, int len)
80 {
81 const long *src = (long *)data;
82 volatile long *dst = (long *)addr;
83
84 if ((u32)data & 0x3)
85 panic("unaligned pointer to writesl");
86
87 while (len-- > 0)
88 *dst = *src++;
89
90
91 }
92
