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2 * This file is part of the SPL: Solaris Porting Layer.
4 * Copyright (c) 2008 Lawrence Livermore National Security, LLC.
5 * Produced at Lawrence Livermore National Laboratory
7 * Brian Behlendorf <behlendorf1@llnl.gov>,
8 * Herb Wartens <wartens2@llnl.gov>,
9 * Jim Garlick <garlick@llnl.gov>
12 * This is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This is distributed in the hope that it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
27 #ifndef _SPL_SYSMACROS_H
28 #define _SPL_SYSMACROS_H
34 #include <linux/module.h>
35 #include <sys/debug.h>
36 #include <sys/varargs.h>
38 #include <sys/signal.h>
41 #define _KERNEL __KERNEL__
49 #define INT32_MAX INT_MAX
50 #define INT32_MIN INT_MIN
51 #define UINT32_MAX UINT_MAX
52 #define UINT32_MIN UINT_MIN
53 #define INT64_MAX LLONG_MAX
54 #define INT64_MIN LLONG_MIN
55 #define UINT64_MAX ULLONG_MAX
56 #define UINT64_MIN ULLONG_MIN
59 #define ENOTSUP ENOTSUPP
62 #define MAXNAMELEN 256
63 #define MAXPATHLEN PATH_MAX
64 #define MAXOFFSET_T 0x7fffffffffffffffl
68 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
71 #define CPU_SEQID smp_processor_id() /* I think... */
74 #define RLIM64_INFINITY RLIM_INFINITY
76 /* 0..MAX_PRIO-1: Process priority
77 * 0..MAX_RT_PRIO-1: RT priority tasks
78 * MAX_RT_PRIO..MAX_PRIO-1: SCHED_NORMAL tasks
80 * Treat shim tasks as SCHED_NORMAL tasks
82 #define minclsyspri (MAX_RT_PRIO)
83 #define maxclsyspri (MAX_PRIO-1)
85 #define NICE_TO_PRIO(nice) (MAX_RT_PRIO + (nice) + 20)
86 #define PRIO_TO_NICE(prio) ((prio) - MAX_RT_PRIO - 20)
90 #define PAGESIZE PAGE_SIZE
92 /* from Solaris sys/byteorder.h */
93 #define BSWAP_8(x) ((x) & 0xff)
94 #define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8))
95 #define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16))
96 #define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32))
98 /* Map some simple functions.
100 #define bzero(ptr,size) memset(ptr,0,size)
101 #define bcopy(src,dest,size) memcpy(dest,src,size)
102 #define bcmp(src,dest,size) memcmp((src), (dest), (size_t)(size))
104 /* Dtrace probes do not exist in the linux kernel */
107 #endif /* DTRACE_PROBE */
108 #define DTRACE_PROBE(a) ((void)0)
112 #endif /* DTRACE_PROBE1 */
113 #define DTRACE_PROBE1(a, b, c) ((void)0)
117 #endif /* DTRACE_PROBE2 */
118 #define DTRACE_PROBE2(a, b, c, d, e) ((void)0)
122 #endif /* DTRACE_PROBE3 */
123 #define DTRACE_PROBE3(a, b, c, d, e, f, g) ((void)0)
127 #endif /* DTRACE_PROBE4 */
128 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) ((void)0)
130 /* Missing globals */
131 extern char spl_version
[16];
132 extern long spl_hostid
;
133 extern char hw_serial
[11];
136 /* Missing misc functions */
137 extern int highbit(unsigned long i
);
138 extern int ddi_strtoul(const char *str
, char **nptr
,
139 int base
, unsigned long *result
);
141 #define makedevice(maj,min) makedev(maj,min)
145 #define MIN(a, b) ((a) < (b) ? (a) : (b))
148 #define MAX(a, b) ((a) < (b) ? (b) : (a))
151 #define ABS(a) ((a) < 0 ? -(a) : (a))
155 * Compatibility macros/typedefs needed for Solaris -> Linux port
157 #define P2ALIGN(x, align) ((x) & -(align))
158 #define P2CROSS(x, y, align) (((x) ^ (y)) > (align) - 1)
159 #define P2ROUNDUP(x, align) (-(-(x) & -(align)))
160 #define P2ROUNDUP_TYPED(x, align, type) \
161 (-(-(type)(x) & -(type)(align)))
162 #define P2PHASE(x, align) ((x) & ((align) - 1))
163 #define P2NPHASE(x, align) (-(x) & ((align) - 1))
164 #define P2NPHASE_TYPED(x, align, type) \
165 (-(type)(x) & ((type)(align) - 1))
166 #define ISP2(x) (((x) & ((x) - 1)) == 0)
167 #define IS_P2ALIGNED(v, a) ((((uintptr_t)(v)) & ((uintptr_t)(a) - 1)) == 0)
168 #define P2BOUNDARY(off, len, align) \
169 (((off) ^ ((off) + (len) - 1)) > (align) - 1)
172 * Typed version of the P2* macros. These macros should be used to ensure
173 * that the result is correctly calculated based on the data type of (x),
174 * which is passed in as the last argument, regardless of the data
175 * type of the alignment. For example, if (x) is of type uint64_t,
176 * and we want to round it up to a page boundary using "PAGESIZE" as
177 * the alignment, we can do either
178 * P2ROUNDUP(x, (uint64_t)PAGESIZE)
180 * P2ROUNDUP_TYPED(x, PAGESIZE, uint64_t)
182 #define P2ALIGN_TYPED(x, align, type) \
183 ((type)(x) & -(type)(align))
184 #define P2PHASE_TYPED(x, align, type) \
185 ((type)(x) & ((type)(align) - 1))
186 #define P2NPHASE_TYPED(x, align, type) \
187 (-(type)(x) & ((type)(align) - 1))
188 #define P2ROUNDUP_TYPED(x, align, type) \
189 (-(-(type)(x) & -(type)(align)))
190 #define P2END_TYPED(x, align, type) \
191 (-(~(type)(x) & -(type)(align)))
192 #define P2PHASEUP_TYPED(x, align, phase, type) \
193 ((type)(phase) - (((type)(phase) - (type)(x)) & -(type)(align)))
194 #define P2CROSS_TYPED(x, y, align, type) \
195 (((type)(x) ^ (type)(y)) > (type)(align) - 1)
196 #define P2SAMEHIGHBIT_TYPED(x, y, type) \
197 (((type)(x) ^ (type)(y)) < ((type)(x) & (type)(y)))
199 #if defined(_KERNEL) && !defined(_KMEMUSER) && !defined(offsetof)
201 /* avoid any possibility of clashing with <stddef.h> version */
203 #define offsetof(s, m) ((size_t)(&(((s *)0)->m)))
210 #endif /* _SPL_SYSMACROS_H */