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mirror_zfs/include/os/freebsd/spl/sys/sysmacros.h
Matthew Macy 9f0a21e641
Add FreeBSD support to OpenZFS 
Add the FreeBSD platform code to the OpenZFS repository.  As of this
commit the source can be compiled and tested on FreeBSD 11 and 12.
Subsequent commits are now required to compile on FreeBSD and Linux.
Additionally, they must pass the ZFS Test Suite on FreeBSD which is
being run by the CI.  As of this commit 1230 tests pass on FreeBSD
and there are no unexpected failures.

Reviewed-by: Sean Eric Fagan <sef@ixsystems.com>
Reviewed-by: Jorgen Lundman <lundman@lundman.net>
Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #898 
Closes #8987
2020-04-14 11:36:28 -07:00

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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 http://www.opensolaris.org/os/licensing.
* 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 (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_SYSMACROS_H
#define _SYS_SYSMACROS_H
#include <sys/param.h>
#include <sys/isa_defs.h>
#include <sys/libkern.h>
#include <sys/zone.h>
#include <sys/condvar.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Some macros for units conversion
*/
/*
* Disk blocks (sectors) and bytes.
*/
#define dtob(DD) ((DD) << DEV_BSHIFT)
#define btod(BB) (((BB) + DEV_BSIZE - 1) >> DEV_BSHIFT)
#define btodt(BB) ((BB) >> DEV_BSHIFT)
#define lbtod(BB) (((offset_t)(BB) + DEV_BSIZE - 1) >> DEV_BSHIFT)
/* common macros */
#ifndef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a, b) ((a) < (b) ? (b) : (a))
#endif
#ifndef ABS
#define ABS(a) ((a) < 0 ? -(a) : (a))
#endif
#ifndef SIGNOF
#define SIGNOF(a) ((a) < 0 ? -1 : (a) > 0)
#endif
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(a) (sizeof (a) / sizeof (a[0]))
#endif
#ifndef DIV_ROUND_UP
#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
#endif
#define boot_ncpus mp_ncpus
#define kpreempt_disable() critical_enter()
#define kpreempt_enable() critical_exit()
#define CPU_SEQID curcpu
#define is_system_labeled() 0
/*
* Convert a single byte to/from binary-coded decimal (BCD).
*/
extern unsigned char byte_to_bcd[256];
extern unsigned char bcd_to_byte[256];
#define BYTE_TO_BCD(x) byte_to_bcd[(x) & 0xff]
#define BCD_TO_BYTE(x) bcd_to_byte[(x) & 0xff]
/*
* WARNING: The device number macros defined here should not be used by device
* drivers or user software. Device drivers should use the device functions
* defined in the DDI/DKI interface (see also ddi.h). Application software
* should make use of the library routines available in makedev(3). A set of
* new device macros are provided to operate on the expanded device number
* format supported in SVR4. Macro versions of the DDI device functions are
* provided for use by kernel proper routines only. Macro routines bmajor(),
* major(), minor(), emajor(), eminor(), and makedev() will be removed or
* their definitions changed at the next major release following SVR4.
*/
#define O_BITSMAJOR 7 /* # of SVR3 major device bits */
#define O_BITSMINOR 8 /* # of SVR3 minor device bits */
#define O_MAXMAJ 0x7f /* SVR3 max major value */
#define O_MAXMIN 0xff /* SVR3 max minor value */
#define L_BITSMAJOR32 14 /* # of SVR4 major device bits */
#define L_BITSMINOR32 18 /* # of SVR4 minor device bits */
#define L_MAXMAJ32 0x3fff /* SVR4 max major value */
#define L_MAXMIN32 0x3ffff /* MAX minor for 3b2 software drivers. */
/* For 3b2 hardware devices the minor is */
/* restricted to 256 (0-255) */
#ifdef _LP64
#define L_BITSMAJOR 32 /* # of major device bits in 64-bit Solaris */
#define L_BITSMINOR 32 /* # of minor device bits in 64-bit Solaris */
#define L_MAXMAJ 0xfffffffful /* max major value */
#define L_MAXMIN 0xfffffffful /* max minor value */
#else
#define L_BITSMAJOR L_BITSMAJOR32
#define L_BITSMINOR L_BITSMINOR32
#define L_MAXMAJ L_MAXMAJ32
#define L_MAXMIN L_MAXMIN32
#endif
/*
* These are versions of the kernel routines for compressing and
* expanding long device numbers that don't return errors.
*/
#if (L_BITSMAJOR32 == L_BITSMAJOR) && (L_BITSMINOR32 == L_BITSMINOR)
#define DEVCMPL(x) (x)
#define DEVEXPL(x) (x)
#else
#define DEVCMPL(x) \
(dev32_t)((((x) >> L_BITSMINOR) > L_MAXMAJ32 || \
((x) & L_MAXMIN) > L_MAXMIN32) ? NODEV32 : \
((((x) >> L_BITSMINOR) << L_BITSMINOR32) | ((x) & L_MAXMIN32)))
#define DEVEXPL(x) \
(((x) == NODEV32) ? NODEV : \
makedevice(((x) >> L_BITSMINOR32) & L_MAXMAJ32, (x) & L_MAXMIN32))
#endif /* L_BITSMAJOR32 ... */
/* convert to old (SVR3.2) dev format */
#define cmpdev(x) \
(o_dev_t)((((x) >> L_BITSMINOR) > O_MAXMAJ || \
((x) & L_MAXMIN) > O_MAXMIN) ? NODEV : \
((((x) >> L_BITSMINOR) << O_BITSMINOR) | ((x) & O_MAXMIN)))
/* convert to new (SVR4) dev format */
#define expdev(x) \
(dev_t)(((dev_t)(((x) >> O_BITSMINOR) & O_MAXMAJ) << L_BITSMINOR) | \
((x) & O_MAXMIN))
/*
* Macro for checking power of 2 address alignment.
*/
#define IS_P2ALIGNED(v, a) ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
/*
* Macros for counting and rounding.
*/
#define howmany(x, y) (((x)+((y)-1))/(y))
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
/*
* Macro to determine if value is a power of 2
*/
#define ISP2(x) (((x) & ((x) - 1)) == 0)
/*
* Macros for various sorts of alignment and rounding. The "align" must
* be a power of 2. Often times it is a block, sector, or page.
*/
/*
* return x rounded down to an align boundary
* eg, P2ALIGN(1200, 1024) == 1024 (1*align)
* eg, P2ALIGN(1024, 1024) == 1024 (1*align)
* eg, P2ALIGN(0x1234, 0x100) == 0x1200 (0x12*align)
* eg, P2ALIGN(0x5600, 0x100) == 0x5600 (0x56*align)
*/
#define P2ALIGN(x, align) ((x) & -(align))
/*
* return x % (mod) align
* eg, P2PHASE(0x1234, 0x100) == 0x34 (x-0x12*align)
* eg, P2PHASE(0x5600, 0x100) == 0x00 (x-0x56*align)
*/
#define P2PHASE(x, align) ((x) & ((align) - 1))
/*
* return how much space is left in this block (but if it's perfectly
* aligned, return 0).
* eg, P2NPHASE(0x1234, 0x100) == 0xcc (0x13*align-x)
* eg, P2NPHASE(0x5600, 0x100) == 0x00 (0x56*align-x)
*/
#define P2NPHASE(x, align) (-(x) & ((align) - 1))
/*
* return x rounded up to an align boundary
* eg, P2ROUNDUP(0x1234, 0x100) == 0x1300 (0x13*align)
* eg, P2ROUNDUP(0x5600, 0x100) == 0x5600 (0x56*align)
*/
#define P2ROUNDUP(x, align) (-(-(x) & -(align)))
/*
* return the ending address of the block that x is in
* eg, P2END(0x1234, 0x100) == 0x12ff (0x13*align - 1)
* eg, P2END(0x5600, 0x100) == 0x56ff (0x57*align - 1)
*/
#define P2END(x, align) (-(~(x) & -(align)))
/*
* return x rounded up to the next phase (offset) within align.
* phase should be < align.
* eg, P2PHASEUP(0x1234, 0x100, 0x10) == 0x1310 (0x13*align + phase)
* eg, P2PHASEUP(0x5600, 0x100, 0x10) == 0x5610 (0x56*align + phase)
*/
#define P2PHASEUP(x, align, phase) ((phase) - (((phase) - (x)) & -(align)))
/*
* return TRUE if adding len to off would cause it to cross an align
* boundary.
* eg, P2BOUNDARY(0x1234, 0xe0, 0x100) == TRUE (0x1234 + 0xe0 == 0x1314)
* eg, P2BOUNDARY(0x1234, 0x50, 0x100) == FALSE (0x1234 + 0x50 == 0x1284)
*/
#define P2BOUNDARY(off, len, align) \
(((off) ^ ((off) + (len) - 1)) > (align) - 1)
/*
* Return TRUE if they have the same highest bit set.
* eg, P2SAMEHIGHBIT(0x1234, 0x1001) == TRUE (the high bit is 0x1000)
* eg, P2SAMEHIGHBIT(0x1234, 0x3010) == FALSE (high bit of 0x3010 is 0x2000)
*/
#define P2SAMEHIGHBIT(x, y) (((x) ^ (y)) < ((x) & (y)))
/*
* Typed version of the P2* macros. These macros should be used to ensure
* that the result is correctly calculated based on the data type of (x),
* which is passed in as the last argument, regardless of the data
* type of the alignment. For example, if (x) is of type uint64_t,
* and we want to round it up to a page boundary using "PAGESIZE" as
* the alignment, we can do either
* P2ROUNDUP(x, (uint64_t)PAGESIZE)
* or
* P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t)
*/
#define P2ALIGN_TYPED(x, align, type) \
((type)(x) & -(type)(align))
#define P2PHASE_TYPED(x, align, type) \
((type)(x) & ((type)(align) - 1))
#define P2NPHASE_TYPED(x, align, type) \
(-(type)(x) & ((type)(align) - 1))
#define P2ROUNDUP_TYPED(x, align, type) \
(-(-(type)(x) & -(type)(align)))
#define P2END_TYPED(x, align, type) \
(-(~(type)(x) & -(type)(align)))
#define P2PHASEUP_TYPED(x, align, phase, type) \
((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align)))
#define P2CROSS_TYPED(x, y, align, type) \
(((type)(x) ^ (type)(y)) > (type)(align) - 1)
#define P2SAMEHIGHBIT_TYPED(x, y, type) \
(((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y)))
/*
* Macros to atomically increment/decrement a variable. mutex and var
* must be pointers.
*/
#define INCR_COUNT(var, mutex) mutex_enter(mutex), (*(var))++, mutex_exit(mutex)
#define DECR_COUNT(var, mutex) mutex_enter(mutex), (*(var))--, mutex_exit(mutex)
/*
* Macros to declare bitfields - the order in the parameter list is
* Low to High - that is, declare bit 0 first. We only support 8-bit bitfields
* because if a field crosses a byte boundary it's not likely to be meaningful
* without reassembly in its nonnative endianness.
*/
#if defined(_BIT_FIELDS_LTOH)
#define DECL_BITFIELD2(_a, _b) \
uint8_t _a, _b
#define DECL_BITFIELD3(_a, _b, _c) \
uint8_t _a, _b, _c
#define DECL_BITFIELD4(_a, _b, _c, _d) \
uint8_t _a, _b, _c, _d
#define DECL_BITFIELD5(_a, _b, _c, _d, _e) \
uint8_t _a, _b, _c, _d, _e
#define DECL_BITFIELD6(_a, _b, _c, _d, _e, _f) \
uint8_t _a, _b, _c, _d, _e, _f
#define DECL_BITFIELD7(_a, _b, _c, _d, _e, _f, _g) \
uint8_t _a, _b, _c, _d, _e, _f, _g
#define DECL_BITFIELD8(_a, _b, _c, _d, _e, _f, _g, _h) \
uint8_t _a, _b, _c, _d, _e, _f, _g, _h
#elif defined(_BIT_FIELDS_HTOL)
#define DECL_BITFIELD2(_a, _b) \
uint8_t _b, _a
#define DECL_BITFIELD3(_a, _b, _c) \
uint8_t _c, _b, _a
#define DECL_BITFIELD4(_a, _b, _c, _d) \
uint8_t _d, _c, _b, _a
#define DECL_BITFIELD5(_a, _b, _c, _d, _e) \
uint8_t _e, _d, _c, _b, _a
#define DECL_BITFIELD6(_a, _b, _c, _d, _e, _f) \
uint8_t _f, _e, _d, _c, _b, _a
#define DECL_BITFIELD7(_a, _b, _c, _d, _e, _f, _g) \
uint8_t _g, _f, _e, _d, _c, _b, _a
#define DECL_BITFIELD8(_a, _b, _c, _d, _e, _f, _g, _h) \
uint8_t _h, _g, _f, _e, _d, _c, _b, _a
#else
#error One of _BIT_FIELDS_LTOH or _BIT_FIELDS_HTOL must be defined
#endif /* _BIT_FIELDS_LTOH */
#if !defined(_KMEMUSER) && !defined(offsetof)
/* avoid any possibility of clashing with <stddef.h> version */
#define offsetof(s, m) ((size_t)(&(((s *)0)->m)))
#endif
/*
* Find highest one bit set.
* Returns bit number + 1 of highest bit that is set, otherwise returns 0.
* High order bit is 31 (or 63 in _LP64 kernel).
*/
static __inline int
highbit(ulong_t i)
{
#if defined(HAVE_INLINE_FLSL)
return (flsl(i));
#else
int h = 1;
if (i == 0)
return (0);
#ifdef _LP64
if (i & 0xffffffff00000000ul) {
h += 32; i >>= 32;
}
#endif
if (i & 0xffff0000) {
h += 16; i >>= 16;
}
if (i & 0xff00) {
h += 8; i >>= 8;
}
if (i & 0xf0) {
h += 4; i >>= 4;
}
if (i & 0xc) {
h += 2; i >>= 2;
}
if (i & 0x2) {
h += 1;
}
return (h);
#endif
}
/*
* Find highest one bit set.
* Returns bit number + 1 of highest bit that is set, otherwise returns 0.
*/
static __inline int
highbit64(uint64_t i)
{
#if defined(HAVE_INLINE_FLSLL)
return (flsll(i));
#else
int h = 1;
if (i == 0)
return (0);
if (i & 0xffffffff00000000ULL) {
h += 32; i >>= 32;
}
if (i & 0xffff0000) {
h += 16; i >>= 16;
}
if (i & 0xff00) {
h += 8; i >>= 8;
}
if (i & 0xf0) {
h += 4; i >>= 4;
}
if (i & 0xc) {
h += 2; i >>= 2;
}
if (i & 0x2) {
h += 1;
}
return (h);
#endif
}
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SYSMACROS_H */
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