1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright 2006 PathScale, Inc.  All Rights Reserved.
 
 
 
 
 
 
 
 
 
 
 
 
 
 4 */
 5
 6#include <linux/export.h>
 7#include <linux/io.h>
 8
 9/**
10 * __iowrite32_copy - copy data to MMIO space, in 32-bit units
11 * @to: destination, in MMIO space (must be 32-bit aligned)
12 * @from: source (must be 32-bit aligned)
13 * @count: number of 32-bit quantities to copy
14 *
15 * Copy data from kernel space to MMIO space, in units of 32 bits at a
16 * time.  Order of access is not guaranteed, nor is a memory barrier
17 * performed afterwards.
18 */
19void __attribute__((weak)) __iowrite32_copy(void __iomem *to,
20					    const void *from,
21					    size_t count)
22{
23	u32 __iomem *dst = to;
24	const u32 *src = from;
25	const u32 *end = src + count;
26
27	while (src < end)
28		__raw_writel(*src++, dst++);
29}
30EXPORT_SYMBOL_GPL(__iowrite32_copy);
31
32/**
33 * __ioread32_copy - copy data from MMIO space, in 32-bit units
34 * @to: destination (must be 32-bit aligned)
35 * @from: source, in MMIO space (must be 32-bit aligned)
36 * @count: number of 32-bit quantities to copy
37 *
38 * Copy data from MMIO space to kernel space, in units of 32 bits at a
39 * time.  Order of access is not guaranteed, nor is a memory barrier
40 * performed afterwards.
41 */
42void __ioread32_copy(void *to, const void __iomem *from, size_t count)
43{
44	u32 *dst = to;
45	const u32 __iomem *src = from;
46	const u32 __iomem *end = src + count;
47
48	while (src < end)
49		*dst++ = __raw_readl(src++);
50}
51EXPORT_SYMBOL_GPL(__ioread32_copy);
52
53/**
54 * __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units
55 * @to: destination, in MMIO space (must be 64-bit aligned)
56 * @from: source (must be 64-bit aligned)
57 * @count: number of 64-bit quantities to copy
58 *
59 * Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a
60 * time.  Order of access is not guaranteed, nor is a memory barrier
61 * performed afterwards.
62 */
63void __attribute__((weak)) __iowrite64_copy(void __iomem *to,
64					    const void *from,
65					    size_t count)
66{
67#ifdef CONFIG_64BIT
68	u64 __iomem *dst = to;
69	const u64 *src = from;
70	const u64 *end = src + count;
71
72	while (src < end)
73		__raw_writeq(*src++, dst++);
74#else
75	__iowrite32_copy(to, from, count * 2);
76#endif
77}
78
79EXPORT_SYMBOL_GPL(__iowrite64_copy);

 
 1/*
 2 * Copyright 2006 PathScale, Inc.  All Rights Reserved.
 3 *
 4 * This file is free software; you can redistribute it and/or modify
 5 * it under the terms of version 2 of the GNU General Public License
 6 * as published by the Free Software Foundation.
 7 *
 8 * This program is distributed in the hope that it will be useful,
 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software Foundation,
15 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
16 */
17
18#include <linux/export.h>
19#include <linux/io.h>
20
21/**
22 * __iowrite32_copy - copy data to MMIO space, in 32-bit units
23 * @to: destination, in MMIO space (must be 32-bit aligned)
24 * @from: source (must be 32-bit aligned)
25 * @count: number of 32-bit quantities to copy
26 *
27 * Copy data from kernel space to MMIO space, in units of 32 bits at a
28 * time.  Order of access is not guaranteed, nor is a memory barrier
29 * performed afterwards.
30 */
31void __attribute__((weak)) __iowrite32_copy(void __iomem *to,
32					    const void *from,
33					    size_t count)
34{
35	u32 __iomem *dst = to;
36	const u32 *src = from;
37	const u32 *end = src + count;
38
39	while (src < end)
40		__raw_writel(*src++, dst++);
41}
42EXPORT_SYMBOL_GPL(__iowrite32_copy);
43
44/**
45 * __ioread32_copy - copy data from MMIO space, in 32-bit units
46 * @to: destination (must be 32-bit aligned)
47 * @from: source, in MMIO space (must be 32-bit aligned)
48 * @count: number of 32-bit quantities to copy
49 *
50 * Copy data from MMIO space to kernel space, in units of 32 bits at a
51 * time.  Order of access is not guaranteed, nor is a memory barrier
52 * performed afterwards.
53 */
54void __ioread32_copy(void *to, const void __iomem *from, size_t count)
55{
56	u32 *dst = to;
57	const u32 __iomem *src = from;
58	const u32 __iomem *end = src + count;
59
60	while (src < end)
61		*dst++ = __raw_readl(src++);
62}
63EXPORT_SYMBOL_GPL(__ioread32_copy);
64
65/**
66 * __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units
67 * @to: destination, in MMIO space (must be 64-bit aligned)
68 * @from: source (must be 64-bit aligned)
69 * @count: number of 64-bit quantities to copy
70 *
71 * Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a
72 * time.  Order of access is not guaranteed, nor is a memory barrier
73 * performed afterwards.
74 */
75void __attribute__((weak)) __iowrite64_copy(void __iomem *to,
76					    const void *from,
77					    size_t count)
78{
79#ifdef CONFIG_64BIT
80	u64 __iomem *dst = to;
81	const u64 *src = from;
82	const u64 *end = src + count;
83
84	while (src < end)
85		__raw_writeq(*src++, dst++);
86#else
87	__iowrite32_copy(to, from, count * 2);
88#endif
89}
90
91EXPORT_SYMBOL_GPL(__iowrite64_copy);