1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * I/O access functions for Hexagon
4 *
5 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
6 */
7
8 #include <asm/io.h>
9
10 /* These are all FIFO routines! */
11
12 /*
13 * __raw_readsw - read words a short at a time
14 * @addr: source address
15 * @data: data address
16 * @len: number of shorts to read
17 */
__raw_readsw(const void __iomem * addr,void * data,int len)18 void __raw_readsw(const void __iomem *addr, void *data, int len)
19 {
20 const volatile short int *src = (short int *) addr;
21 short int *dst = (short int *) data;
22
23 if ((u32)data & 0x1)
24 panic("unaligned pointer to readsw");
25
26 while (len-- > 0)
27 *dst++ = *src;
28
29 }
30
31 /*
32 * __raw_writesw - read words a short at a time
33 * @addr: source address
34 * @data: data address
35 * @len: number of shorts to read
36 */
__raw_writesw(void __iomem * addr,const void * data,int len)37 void __raw_writesw(void __iomem *addr, const void *data, int len)
38 {
39 const short int *src = (short int *)data;
40 volatile short int *dst = (short int *)addr;
41
42 if ((u32)data & 0x1)
43 panic("unaligned pointer to writesw");
44
45 while (len-- > 0)
46 *dst = *src++;
47
48
49 }
50
51 /* Pretty sure len is pre-adjusted for the length of the access already */
__raw_readsl(const void __iomem * addr,void * data,int len)52 void __raw_readsl(const void __iomem *addr, void *data, int len)
53 {
54 const volatile long *src = (long *) addr;
55 long *dst = (long *) data;
56
57 if ((u32)data & 0x3)
58 panic("unaligned pointer to readsl");
59
60 while (len-- > 0)
61 *dst++ = *src;
62
63
64 }
65
__raw_writesl(void __iomem * addr,const void * data,int len)66 void __raw_writesl(void __iomem *addr, const void *data, int len)
67 {
68 const long *src = (long *)data;
69 volatile long *dst = (long *)addr;
70
71 if ((u32)data & 0x3)
72 panic("unaligned pointer to writesl");
73
74 while (len-- > 0)
75 *dst = *src++;
76
77
78 }
79