cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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mangle-port.h (1429B)

      1/* SPDX-License-Identifier: GPL-2.0
      2 *
      3 * SH version cribbed from the MIPS copy:
      4 *
      5 * Copyright (C) 2003, 2004 Ralf Baechle
      6 */
      7#ifndef __MACH_COMMON_MANGLE_PORT_H
      8#define __MACH_COMMON_MANGLE_PORT_H
      9
     10/*
     11 * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware;
     12 * less sane hardware forces software to fiddle with this...
     13 *
     14 * Regardless, if the host bus endianness mismatches that of PCI/ISA, then
     15 * you can't have the numerical value of data and byte addresses within
     16 * multibyte quantities both preserved at the same time.  Hence two
     17 * variations of functions: non-prefixed ones that preserve the value
     18 * and prefixed ones that preserve byte addresses.  The latters are
     19 * typically used for moving raw data between a peripheral and memory (cf.
     20 * string I/O functions), hence the "__mem_" prefix.
     21 */
     22#if defined(CONFIG_SWAP_IO_SPACE)
     23
     24# define ioswabb(x)		(x)
     25# define __mem_ioswabb(x)	(x)
     26# define ioswabw(x)		le16_to_cpu(x)
     27# define __mem_ioswabw(x)	(x)
     28# define ioswabl(x)		le32_to_cpu(x)
     29# define __mem_ioswabl(x)	(x)
     30# define ioswabq(x)		le64_to_cpu(x)
     31# define __mem_ioswabq(x)	(x)
     32
     33#else
     34
     35# define ioswabb(x)		(x)
     36# define __mem_ioswabb(x)	(x)
     37# define ioswabw(x)		(x)
     38# define __mem_ioswabw(x)	cpu_to_le16(x)
     39# define ioswabl(x)		(x)
     40# define __mem_ioswabl(x)	cpu_to_le32(x)
     41# define ioswabq(x)		(x)
     42# define __mem_ioswabq(x)	cpu_to_le32(x)
     43
     44#endif
     45
     46#endif /* __MACH_COMMON_MANGLE_PORT_H */