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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or https://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_ISA_DEFS_H
#define _SYS_ISA_DEFS_H
#include <sys/endian.h>
/*
* This header file serves to group a set of well known defines and to
* set these for each instruction set architecture. These defines may
* be divided into two groups; characteristics of the processor and
* implementation choices for Solaris on a processor.
*
* Processor Characteristics:
*
* _LITTLE_ENDIAN / _BIG_ENDIAN:
* The natural byte order of the processor. A pointer to an int points
* to the least/most significant byte of that int.
*
*
* Implementation Choices:
*
* _ILP32 / _LP64:
* This specifies the compiler data type implementation as specified in
* the relevant ABI. The choice between these is strongly influenced
* by the underlying hardware, but is not absolutely tied to it.
* Currently only two data type models are supported:
*
* _ILP32:
* Int/Long/Pointer are 32 bits. This is the historical UNIX
* and Solaris implementation. Due to its historical standing,
* this is the default case.
*
* _LP64:
* Long/Pointer are 64 bits, Int is 32 bits. This is the chosen
* implementation for 64-bit ABIs such as SPARC V9.
*
* In all cases, Char is 8 bits and Short is 16 bits.
*
* _SUNOS_VTOC_8 / _SUNOS_VTOC_16 / _SVR4_VTOC_16:
* This specifies the form of the disk VTOC (or label):
*
* _SUNOS_VTOC_8:
* This is a VTOC form which is upwardly compatible with the
* SunOS 4.x disk label and allows 8 partitions per disk.
*
* _SUNOS_VTOC_16:
* In this format the incore vtoc image matches the ondisk
* version. It allows 16 slices per disk, and is not
* compatible with the SunOS 4.x disk label.
*
* Note that these are not the only two VTOC forms possible and
* additional forms may be added. One possible form would be the
* SVr4 VTOC form. The symbol for that is reserved now, although
* it is not implemented.
*
* _SVR4_VTOC_16:
* This VTOC form is compatible with the System V Release 4
* VTOC (as implemented on the SVr4 Intel and 3b ports) with
* 16 partitions per disk.
*
*
* __x86
* This is ONLY a synonym for defined(__i386) || defined(__amd64)
* which is useful only insofar as these two architectures share
* common attributes. Analogous to __sparc.
*/
#ifdef __cplusplus
extern "C" {
#endif
/*
* The following set of definitions characterize Solaris on AMD's
* 64-bit systems.
*/
#if defined(__x86_64) || defined(__amd64)
#if !defined(__amd64)
#define __amd64 /* preferred guard */
#endif
#if !defined(__x86)
#define __x86
#endif
/*
* Define the appropriate "implementation choices".
*/
#if !defined(_LP64)
#error "_LP64 not defined"
#endif
#define _SUNOS_VTOC_16
/*
* The feature test macro __i386 is generic for all processors implementing
* the Intel 386 instruction set or a superset of it. Specifically, this
* includes all members of the 386, 486, and Pentium family of processors.
*/
#elif defined(__i386) || defined(__i386__)
#if !defined(__i386)
#define __i386
#endif
#if !defined(__x86)
#define __x86
#endif
/*
* Define the appropriate "implementation choices".
*/
#if !defined(_ILP32)
#define _ILP32
#endif
#define _SUNOS_VTOC_16
#elif defined(__aarch64__)
/*
* Define the appropriate "implementation choices"
*/
#if !defined(_LP64)
#error "_LP64 not defined"
#endif
#define _SUNOS_VTOC_16
#elif defined(__riscv)
/*
* Define the appropriate "implementation choices"
*/
#if !defined(_LP64)
#define _LP64
#endif
#define _SUNOS_VTOC_16
#elif defined(__arm__)
/*
* Define the appropriate "implementation choices".
*/
#if !defined(_ILP32)
#define _ILP32
#endif
#define _SUNOS_VTOC_16
#elif defined(__mips__)
#if defined(__mips_n64)
/*
* Define the appropriate "implementation choices".
*/
#if !defined(_LP64)
#error "_LP64 not defined"
#endif
#else
/*
* Define the appropriate "implementation choices".
*/
#if !defined(_ILP32)
#define _ILP32
#endif
#endif
#define _SUNOS_VTOC_16
#elif defined(__powerpc__)
#if !defined(__powerpc)
#define __powerpc
#endif
#define _SUNOS_VTOC_16 1
/*
* The following set of definitions characterize the Solaris on SPARC systems.
*
* The symbol __sparc indicates any of the SPARC family of processor
* architectures. This includes SPARC V7, SPARC V8 and SPARC V9.
*
* The symbol __sparcv8 indicates the 32-bit SPARC V8 architecture as defined
* by Version 8 of the SPARC Architecture Manual. (SPARC V7 is close enough
* to SPARC V8 for the former to be subsumed into the latter definition.)
*
* The symbol __sparcv9 indicates the 64-bit SPARC V9 architecture as defined
* by Version 9 of the SPARC Architecture Manual.
*
* The symbols __sparcv8 and __sparcv9 are mutually exclusive, and are only
* relevant when the symbol __sparc is defined.
*/
/*
* XXX Due to the existence of 5110166, "defined(__sparcv9)" needs to be added
* to support backwards builds. This workaround should be removed in s10_71.
*/
#elif defined(__sparc) || defined(__sparcv9) || defined(__sparc__)
#if !defined(__sparc)
#define __sparc
#endif
/*
* You can be 32-bit or 64-bit, but not both at the same time.
*/
#if defined(__sparcv8) && defined(__sparcv9)
#error "SPARC Versions 8 and 9 are mutually exclusive choices"
#endif
/*
* Existing compilers do not set __sparcv8. Years will transpire before
* the compilers can be depended on to set the feature test macro. In
* the interim, we'll set it here on the basis of historical behaviour;
* if you haven't asked for SPARC V9, then you must've meant SPARC V8.
*/
#if !defined(__sparcv9) && !defined(__sparcv8)
#define __sparcv8
#endif
/*
* Define the appropriate "implementation choices" shared between versions.
*/
#define _SUNOS_VTOC_8
/*
* The following set of definitions characterize the implementation of
* 32-bit Solaris on SPARC V8 systems.
*/
#if defined(__sparcv8)
/*
* Define the appropriate "implementation choices"
*/
#define _ILP32
/*
* The following set of definitions characterize the implementation of
* 64-bit Solaris on SPARC V9 systems.
*/
#elif defined(__sparcv9)
/*
* Define the appropriate "implementation choices"
*/
#if !defined(_LP64)
#error "_LP64 not defined"
#endif
#else
#error "unknown SPARC version"
#endif
/*
* #error is strictly ansi-C, but works as well as anything for K&R systems.
*/
#else
#error "ISA not supported"
#endif
#if defined(_ILP32) && defined(_LP64)
#error "Both _ILP32 and _LP64 are defined"
#endif
#if BYTE_ORDER == _BIG_ENDIAN
#define _ZFS_BIG_ENDIAN
#elif BYTE_ORDER == _LITTLE_ENDIAN
#define _ZFS_LITTLE_ENDIAN
#else
#error "unknown byte order"
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SYS_ISA_DEFS_H */
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