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775c8a3d71
Based on 1 normalized pattern(s): this file is free software you can redistribute it and or modify it under the terms of version 2 of the gnu general public license as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin st fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 8 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081207.443595178@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2006 PathScale, Inc. All Rights Reserved.
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*/
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#include <linux/export.h>
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#include <linux/io.h>
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/**
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* __iowrite32_copy - copy data to MMIO space, in 32-bit units
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* @to: destination, in MMIO space (must be 32-bit aligned)
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* @from: source (must be 32-bit aligned)
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* @count: number of 32-bit quantities to copy
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*
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* Copy data from kernel space to MMIO space, in units of 32 bits at a
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* time. Order of access is not guaranteed, nor is a memory barrier
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* performed afterwards.
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*/
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void __attribute__((weak)) __iowrite32_copy(void __iomem *to,
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const void *from,
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size_t count)
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{
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u32 __iomem *dst = to;
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const u32 *src = from;
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const u32 *end = src + count;
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while (src < end)
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__raw_writel(*src++, dst++);
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}
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EXPORT_SYMBOL_GPL(__iowrite32_copy);
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/**
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* __ioread32_copy - copy data from MMIO space, in 32-bit units
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* @to: destination (must be 32-bit aligned)
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* @from: source, in MMIO space (must be 32-bit aligned)
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* @count: number of 32-bit quantities to copy
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*
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* Copy data from MMIO space to kernel space, in units of 32 bits at a
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* time. Order of access is not guaranteed, nor is a memory barrier
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* performed afterwards.
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*/
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void __ioread32_copy(void *to, const void __iomem *from, size_t count)
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{
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u32 *dst = to;
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const u32 __iomem *src = from;
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const u32 __iomem *end = src + count;
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while (src < end)
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*dst++ = __raw_readl(src++);
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}
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EXPORT_SYMBOL_GPL(__ioread32_copy);
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/**
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* __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units
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* @to: destination, in MMIO space (must be 64-bit aligned)
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* @from: source (must be 64-bit aligned)
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* @count: number of 64-bit quantities to copy
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*
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* Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a
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* time. Order of access is not guaranteed, nor is a memory barrier
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* performed afterwards.
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*/
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void __attribute__((weak)) __iowrite64_copy(void __iomem *to,
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const void *from,
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size_t count)
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{
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#ifdef CONFIG_64BIT
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u64 __iomem *dst = to;
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const u64 *src = from;
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const u64 *end = src + count;
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while (src < end)
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__raw_writeq(*src++, dst++);
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#else
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__iowrite32_copy(to, from, count * 2);
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#endif
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}
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EXPORT_SYMBOL_GPL(__iowrite64_copy);
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