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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/pcmcia/mem_op.h | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/pcmcia/mem_op.h')
-rw-r--r-- | include/pcmcia/mem_op.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/include/pcmcia/mem_op.h b/include/pcmcia/mem_op.h new file mode 100644 index 000000000000..8d19b9401a5b --- /dev/null +++ b/include/pcmcia/mem_op.h @@ -0,0 +1,116 @@ +/* + * mem_op.h + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * The initial developer of the original code is David A. Hinds + * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds + * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. + * + * (C) 1999 David A. Hinds + */ + +#ifndef _LINUX_MEM_OP_H +#define _LINUX_MEM_OP_H + +#include <asm/uaccess.h> +#include <asm/io.h> + +/* + If UNSAFE_MEMCPY is defined, we use the (optimized) system routines + to copy between a card and kernel memory. These routines do 32-bit + operations which may not work with all PCMCIA controllers. The + safe versions defined here will do only 8-bit and 16-bit accesses. +*/ + +#ifdef UNSAFE_MEMCPY + +#define copy_from_pc memcpy_fromio +#define copy_to_pc memcpy_toio + +static inline void copy_pc_to_user(void *to, const void *from, size_t n) +{ + size_t odd = (n & 3); + n -= odd; + while (n) { + put_user(__raw_readl(from), (int *)to); + (char *)from += 4; (char *)to += 4; n -= 4; + } + while (odd--) + put_user(readb((char *)from++), (char *)to++); +} + +static inline void copy_user_to_pc(void *to, const void *from, size_t n) +{ + int l; + char c; + size_t odd = (n & 3); + n -= odd; + while (n) { + get_user(l, (int *)from); + __raw_writel(l, to); + (char *)to += 4; (char *)from += 4; n -= 4; + } + while (odd--) { + get_user(c, (char *)from++); + writeb(c, (char *)to++); + } +} + +#else /* UNSAFE_MEMCPY */ + +static inline void copy_from_pc(void *to, void __iomem *from, size_t n) +{ + __u16 *t = to; + __u16 __iomem *f = from; + size_t odd = (n & 1); + for (n >>= 1; n; n--) + *t++ = __raw_readw(f++); + if (odd) + *(__u8 *)t = readb(f); +} + +static inline void copy_to_pc(void __iomem *to, const void *from, size_t n) +{ + __u16 __iomem *t = to; + const __u16 *f = from; + size_t odd = (n & 1); + for (n >>= 1; n ; n--) + __raw_writew(*f++, t++); + if (odd) + writeb(*(__u8 *)f, t); +} + +static inline void copy_pc_to_user(void __user *to, void __iomem *from, size_t n) +{ + __u16 __user *t = to; + __u16 __iomem *f = from; + size_t odd = (n & 1); + for (n >>= 1; n ; n--) + put_user(__raw_readw(f++), t++); + if (odd) + put_user(readb(f), (char __user *)t); +} + +static inline void copy_user_to_pc(void __iomem *to, void __user *from, size_t n) +{ + __u16 __user *f = from; + __u16 __iomem *t = to; + short s; + char c; + size_t odd = (n & 1); + for (n >>= 1; n; n--) { + get_user(s, f++); + __raw_writew(s, t++); + } + if (odd) { + get_user(c, (char __user *)f); + writeb(c, t); + } +} + +#endif /* UNSAFE_MEMCPY */ + +#endif /* _LINUX_MEM_OP_H */ |