LCOV - code coverage report
Current view: top level - sound/core - memory.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 16 0.0 %
Date: 2014-02-18 Functions: 0 2 0.0 %
Branches: 0 12 0.0 %

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
       3                 :            :  * 
       4                 :            :  *  Misc memory accessors
       5                 :            :  *
       6                 :            :  *
       7                 :            :  *   This program is free software; you can redistribute it and/or modify
       8                 :            :  *   it under the terms of the GNU General Public License as published by
       9                 :            :  *   the Free Software Foundation; either version 2 of the License, or
      10                 :            :  *   (at your option) any later version.
      11                 :            :  *
      12                 :            :  *   This program is distributed in the hope that it will be useful,
      13                 :            :  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
      14                 :            :  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15                 :            :  *   GNU General Public License for more details.
      16                 :            :  *
      17                 :            :  *   You should have received a copy of the GNU General Public License
      18                 :            :  *   along with this program; if not, write to the Free Software
      19                 :            :  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
      20                 :            :  *
      21                 :            :  */
      22                 :            : 
      23                 :            : #include <linux/export.h>
      24                 :            : #include <asm/io.h>
      25                 :            : #include <asm/uaccess.h>
      26                 :            : #include <sound/core.h>
      27                 :            : 
      28                 :            : /**
      29                 :            :  * copy_to_user_fromio - copy data from mmio-space to user-space
      30                 :            :  * @dst: the destination pointer on user-space
      31                 :            :  * @src: the source pointer on mmio
      32                 :            :  * @count: the data size to copy in bytes
      33                 :            :  *
      34                 :            :  * Copies the data from mmio-space to user-space.
      35                 :            :  *
      36                 :            :  * Return: Zero if successful, or non-zero on failure.
      37                 :            :  */
      38                 :          0 : int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count)
      39                 :            : {
      40                 :            : #if defined(__i386__) || defined(CONFIG_SPARC32)
      41                 :            :         return copy_to_user(dst, (const void __force*)src, count) ? -EFAULT : 0;
      42                 :            : #else
      43                 :            :         char buf[256];
      44         [ #  # ]:          0 :         while (count) {
      45                 :            :                 size_t c = count;
      46         [ #  # ]:          0 :                 if (c > sizeof(buf))
      47                 :            :                         c = sizeof(buf);
      48                 :          0 :                 memcpy_fromio(buf, (void __iomem *)src, c);
      49         [ #  # ]:          0 :                 if (copy_to_user(dst, buf, c))
      50                 :            :                         return -EFAULT;
      51                 :          0 :                 count -= c;
      52                 :          0 :                 dst += c;
      53                 :          0 :                 src += c;
      54                 :            :         }
      55                 :            :         return 0;
      56                 :            : #endif
      57                 :            : }
      58                 :            : 
      59                 :            : EXPORT_SYMBOL(copy_to_user_fromio);
      60                 :            : 
      61                 :            : /**
      62                 :            :  * copy_from_user_toio - copy data from user-space to mmio-space
      63                 :            :  * @dst: the destination pointer on mmio-space
      64                 :            :  * @src: the source pointer on user-space
      65                 :            :  * @count: the data size to copy in bytes
      66                 :            :  *
      67                 :            :  * Copies the data from user-space to mmio-space.
      68                 :            :  *
      69                 :            :  * Return: Zero if successful, or non-zero on failure.
      70                 :            :  */
      71                 :          0 : int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count)
      72                 :            : {
      73                 :            : #if defined(__i386__) || defined(CONFIG_SPARC32)
      74                 :            :         return copy_from_user((void __force *)dst, src, count) ? -EFAULT : 0;
      75                 :            : #else
      76                 :            :         char buf[256];
      77         [ #  # ]:          0 :         while (count) {
      78                 :            :                 size_t c = count;
      79         [ #  # ]:          0 :                 if (c > sizeof(buf))
      80                 :            :                         c = sizeof(buf);
      81         [ #  # ]:          0 :                 if (copy_from_user(buf, src, c))
      82                 :            :                         return -EFAULT;
      83                 :          0 :                 memcpy_toio(dst, buf, c);
      84                 :          0 :                 count -= c;
      85                 :          0 :                 dst += c;
      86                 :          0 :                 src += c;
      87                 :            :         }
      88                 :            :         return 0;
      89                 :            : #endif
      90                 :            : }
      91                 :            : 
      92                 :            : EXPORT_SYMBOL(copy_from_user_toio);

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