52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2003, 2004 Ralf Baechle
|
|
*/
|
|
#ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H
|
|
#define __ASM_MACH_GENERIC_MANGLE_PORT_H
|
|
|
|
#define __swizzle_addr_b(port) (port)
|
|
#define __swizzle_addr_w(port) ((port) ^ 2)
|
|
#define __swizzle_addr_l(port) (port)
|
|
#define __swizzle_addr_q(port) (port)
|
|
|
|
/*
|
|
* Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware;
|
|
* less sane hardware forces software to fiddle with this...
|
|
*
|
|
* Regardless, if the host bus endianness mismatches that of PCI/ISA, then
|
|
* you can't have the numerical value of data and byte addresses within
|
|
* multibyte quantities both preserved at the same time. Hence two
|
|
* variations of functions: non-prefixed ones that preserve the value
|
|
* and prefixed ones that preserve byte addresses. The latters are
|
|
* typically used for moving raw data between a peripheral and memory (cf.
|
|
* string I/O functions), hence the "__mem_" prefix.
|
|
*/
|
|
#if defined(CONFIG_SWAP_IO_SPACE)
|
|
|
|
# define ioswabb(a,x) (x)
|
|
# define __mem_ioswabb(a,x) (x)
|
|
# define ioswabw(a,x) le16_to_cpu(x)
|
|
# define __mem_ioswabw(a,x) (x)
|
|
# define ioswabl(a,x) le32_to_cpu(x)
|
|
# define __mem_ioswabl(a,x) (x)
|
|
# define ioswabq(a,x) le64_to_cpu(x)
|
|
# define __mem_ioswabq(a,x) (x)
|
|
|
|
#else
|
|
|
|
# define ioswabb(a,x) (x)
|
|
# define __mem_ioswabb(a,x) (x)
|
|
# define ioswabw(a,x) (x)
|
|
# define __mem_ioswabw(a,x) cpu_to_le16(x)
|
|
# define ioswabl(a,x) (x)
|
|
# define __mem_ioswabl(a,x) cpu_to_le32(x)
|
|
# define ioswabq(a,x) (x)
|
|
# define __mem_ioswabq(a,x) cpu_to_le32(x)
|
|
|
|
#endif
|
|
|
|
#endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */
|