/* * 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 */