d81a6d7176
These aren't modules, but they do make use of these macros, so they will need export.h to get that definition. Previously, they got it via the implicit module.h inclusion. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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*
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* Misc memory accessors
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/export.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <sound/core.h>
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/**
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* copy_to_user_fromio - copy data from mmio-space to user-space
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* @dst: the destination pointer on user-space
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* @src: the source pointer on mmio
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* @count: the data size to copy in bytes
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*
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* Copies the data from mmio-space to user-space.
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*
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* Returns zero if successful, or non-zero on failure.
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*/
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int copy_to_user_fromio(void __user *dst, const volatile void __iomem *src, size_t count)
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{
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#if defined(__i386__) || defined(CONFIG_SPARC32)
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return copy_to_user(dst, (const void __force*)src, count) ? -EFAULT : 0;
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#else
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char buf[256];
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while (count) {
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size_t c = count;
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if (c > sizeof(buf))
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c = sizeof(buf);
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memcpy_fromio(buf, (void __iomem *)src, c);
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if (copy_to_user(dst, buf, c))
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return -EFAULT;
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count -= c;
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dst += c;
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src += c;
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}
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return 0;
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#endif
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}
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EXPORT_SYMBOL(copy_to_user_fromio);
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/**
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* copy_from_user_toio - copy data from user-space to mmio-space
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* @dst: the destination pointer on mmio-space
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* @src: the source pointer on user-space
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* @count: the data size to copy in bytes
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*
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* Copies the data from user-space to mmio-space.
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*
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* Returns zero if successful, or non-zero on failure.
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*/
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int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size_t count)
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{
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#if defined(__i386__) || defined(CONFIG_SPARC32)
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return copy_from_user((void __force *)dst, src, count) ? -EFAULT : 0;
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#else
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char buf[256];
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while (count) {
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size_t c = count;
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if (c > sizeof(buf))
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c = sizeof(buf);
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if (copy_from_user(buf, src, c))
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return -EFAULT;
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memcpy_toio(dst, buf, c);
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count -= c;
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dst += c;
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src += c;
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}
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return 0;
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#endif
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}
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EXPORT_SYMBOL(copy_from_user_toio);
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