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64 lines
2.2 KiB
64 lines
2.2 KiB
/* |
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* Copyright (c) 2009 QLogic Corporation. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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#include "qib.h" |
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/** |
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* qib_pio_copy - copy data to MMIO space, in multiples of 32-bits |
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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 32-bit quantities to copy |
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* |
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* Copy data from kernel space to MMIO space, in multiples 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 qib_pio_copy(void __iomem *to, const void *from, 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 >> 1); |
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while (src < end) |
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__raw_writeq(*src++, dst++); |
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if (count & 1) |
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__raw_writel(*(const u32 *)src, dst); |
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#else |
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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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#endif |
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}
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