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       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                 :            :  */
      31                 :          0 : void __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                 :          0 :         const u32 *end = src + count;
      38                 :            : 
      39         [ #  # ]:          0 :         while (src < end)
      40                 :          0 :                 __raw_writel(*src++, dst++);
      41                 :          0 : }
      42                 :            : EXPORT_SYMBOL_GPL(__iowrite32_copy);
      43                 :            : 
      44                 :            : /**
      45                 :            :  * __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units
      46                 :            :  * @to: destination, in MMIO space (must be 64-bit aligned)
      47                 :            :  * @from: source (must be 64-bit aligned)
      48                 :            :  * @count: number of 64-bit quantities to copy
      49                 :            :  *
      50                 :            :  * Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a
      51                 :            :  * time.  Order of access is not guaranteed, nor is a memory barrier
      52                 :            :  * performed afterwards.
      53                 :            :  */
      54                 :          0 : void __attribute__((weak)) __iowrite64_copy(void __iomem *to,
      55                 :            :                                             const void *from,
      56                 :            :                                             size_t count)
      57                 :            : {
      58                 :            : #ifdef CONFIG_64BIT
      59                 :            :         u64 __iomem *dst = to;
      60                 :            :         const u64 *src = from;
      61                 :            :         const u64 *end = src + count;
      62                 :            : 
      63                 :            :         while (src < end)
      64                 :            :                 __raw_writeq(*src++, dst++);
      65                 :            : #else
      66                 :          0 :         __iowrite32_copy(to, from, count * 2);
      67                 :            : #endif
      68                 :          0 : }
      69                 :            : 
      70                 :            : EXPORT_SYMBOL_GPL(__iowrite64_copy);