zfs/include/os/linux/spl/sys/isa_defs.h

/*
 *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
 *  Copyright (C) 2007 The Regents of the University of California.
 *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
 *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
 *  UCRL-CODE-235197
 *
 *  This file is part of the SPL, Solaris Porting Layer.
 *  For details, see <http://zfsonlinux.org/>.
 *
 *  The SPL is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the
 *  Free Software Foundation; either version 2 of the License, or (at your
 *  option) any later version.
 *
 *  The SPL is distributed in the hope that it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef	_SPL_ISA_DEFS_H
#define	_SPL_ISA_DEFS_H

/* x86_64 arch specific defines */
#if defined(__x86_64) || defined(__x86_64__)

#if !defined(__x86_64)
#define	__x86_64
#endif

#if !defined(__amd64)
#define	__amd64
#endif

#if !defined(__x86)
#define	__x86
#endif

#if defined(_ILP32)
/* x32-specific defines; careful to *not* define _LP64 here */
#else
#if !defined(_LP64)
#define	_LP64
#endif
#endif

#define	_ALIGNMENT_REQUIRED	1


/* i386 arch specific defines */
#elif defined(__i386) || defined(__i386__)

#if !defined(__i386)
#define	__i386
#endif

#if !defined(__x86)
#define	__x86
#endif

#if !defined(_ILP32)
#define	_ILP32
#endif

#define	_ALIGNMENT_REQUIRED	0

/* powerpc (ppc64) arch specific defines */
#elif defined(__powerpc) || defined(__powerpc__) || defined(__powerpc64__)

#if !defined(__powerpc)
#define	__powerpc
#endif

#if !defined(__powerpc__)
#define	__powerpc__
#endif

#if defined(__powerpc64__)
#if !defined(_LP64)
#define	_LP64
#endif
#else
#if !defined(_ILP32)
#define	_ILP32
#endif
#endif

/*
 * Illumos doesn't define _ALIGNMENT_REQUIRED for PPC, so default to 1
 * out of paranoia.
 */
#define	_ALIGNMENT_REQUIRED	1

/* arm arch specific defines */
#elif defined(__arm) || defined(__arm__) || defined(__aarch64__)

#if !defined(__arm)
#define	__arm
#endif

#if !defined(__arm__)
#define	__arm__
#endif

#if defined(__aarch64__)
#if !defined(_LP64)
#define	_LP64
#endif
#else
#if !defined(_ILP32)
#define	_ILP32
#endif
#endif

#if defined(__ARMEL__) || defined(__AARCH64EL__)
#define	_ZFS_LITTLE_ENDIAN
#else
#define	_ZFS_BIG_ENDIAN
#endif

/*
 * Illumos doesn't define _ALIGNMENT_REQUIRED for ARM, so default to 1
 * out of paranoia.
 */
#define	_ALIGNMENT_REQUIRED	1

/* sparc arch specific defines */
#elif defined(__sparc) || defined(__sparc__)

#if !defined(__sparc)
#define	__sparc
#endif

#if !defined(__sparc__)
#define	__sparc__
#endif

#if defined(__arch64__)
#if !defined(_LP64)
#define	_LP64
#endif
#else
#if !defined(_ILP32)
#define	_ILP32
#endif
#endif

#define	_ZFS_BIG_ENDIAN
#define	_SUNOS_VTOC_16
#define	_ALIGNMENT_REQUIRED	1

/* s390 arch specific defines */
#elif defined(__s390__)
#if defined(__s390x__)
#if !defined(_LP64)
#define	_LP64
#endif
#else
#if !defined(_ILP32)
#define	_ILP32
#endif
#endif

#define	_ZFS_BIG_ENDIAN

/*
 * Illumos doesn't define _ALIGNMENT_REQUIRED for s390, so default to 1
 * out of paranoia.
 */
#define	_ALIGNMENT_REQUIRED	1

/* MIPS arch specific defines */
#elif defined(__mips__)

#if defined(__MIPSEB__)
#define	_ZFS_BIG_ENDIAN
#elif defined(__MIPSEL__)
#define	_ZFS_LITTLE_ENDIAN
#else
#error MIPS no endian specified
#endif

#ifndef _LP64
#define	_ILP32
#endif

#define	_SUNOS_VTOC_16

/*
 * Illumos doesn't define _ALIGNMENT_REQUIRED for MIPS, so default to 1
 * out of paranoia.
 */
#define	_ALIGNMENT_REQUIRED	1

/*
 * RISC-V arch specific defines
 * only RV64G (including atomic) LP64 is supported yet
 */
#elif defined(__riscv) && defined(_LP64) && _LP64 && \
	defined(__riscv_atomic) && __riscv_atomic

#ifndef	__riscv__
#define	__riscv__
#endif

#ifndef	__rv64g__
#define	__rv64g__
#endif

#define	_ZFS_LITTLE_ENDIAN

#define	_SUNOS_VTOC_16

#define	_ALIGNMENT_REQUIRED	1

#else
/*
 * Currently supported:
 * x86_64, x32, i386, arm, powerpc, s390, sparc, mips, and RV64G
 */
#error "Unsupported ISA type"
#endif

#if defined(_ILP32) && defined(_LP64)
#error "Both _ILP32 and _LP64 are defined"
#endif

#if !defined(_ILP32) && !defined(_LP64)
#error "Neither _ILP32 or _LP64 are defined"
#endif

#include <sys/byteorder.h>

/*
 * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS will be defined by the Linux
 * kernel for architectures which support efficient unaligned access.
 */
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
#define	HAVE_EFFICIENT_UNALIGNED_ACCESS
#endif

#if defined(_ZFS_LITTLE_ENDIAN) && defined(_ZFS_BIG_ENDIAN)
#error "Both _ZFS_LITTLE_ENDIAN and _ZFS_BIG_ENDIAN are defined"
#endif

#if !defined(_ZFS_LITTLE_ENDIAN) && !defined(_ZFS_BIG_ENDIAN)
#error "Neither _ZFS_LITTLE_ENDIAN or _ZFS_BIG_ENDIAN are defined"
#endif

#endif	/* _SPL_ISA_DEFS_H */