xref: /titanic_44/usr/src/uts/common/zmod/zutil.c (revision bd335c6465ddbafe543900df4b03247bfa288eff)
1 /*
2  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
3  * Use is subject to license terms.
4  */
5 
6 #pragma ident	"%Z%%M%	%I%	%E% SMI"
7 
8 #include <sys/systm.h>
9 #include <sys/cmn_err.h>
10 #include <sys/kobj.h>
11 #include <sys/kobj_impl.h>
12 
13 /*
14  * This module is used both during the normal operation of the kernel (i.e.
15  * after kmem has been initialized) and during boot (before unix`_start has
16  * been called).  kobj_alloc is able to tell the difference between the two
17  * cases, and as such must be used instead of kmem_alloc.
18  */
19 
20 void
21 zmemcpy(uchar_t *dest, const uchar_t *source, uint_t len)
22 {
23 	bcopy(source, dest, len);
24 }
25 
26 struct zchdr {
27 	uint_t zch_magic;
28 	uint_t zch_size;
29 };
30 
31 #define	ZCH_MAGIC	0x3cc13cc1
32 
33 /*ARGSUSED*/
34 void *
35 zcalloc(void *opaque, uint_t items, uint_t size)
36 {
37 	size_t nbytes = sizeof (struct zchdr) + items * size;
38 	struct zchdr *z = kobj_zalloc(nbytes, KM_NOWAIT|KM_TMP);
39 
40 	if (z == NULL)
41 		return (NULL);
42 
43 	z->zch_magic = ZCH_MAGIC;
44 	z->zch_size = nbytes;
45 
46 	return (z + 1);
47 }
48 
49 /*ARGSUSED*/
50 void
51 zcfree(void *opaque, void *ptr)
52 {
53 	struct zchdr *z = ((struct zchdr *)ptr) - 1;
54 
55 	if (z->zch_magic != ZCH_MAGIC)
56 		panic("zcfree region corrupt: hdr=%p ptr=%p", (void *)z, ptr);
57 
58 	kobj_free(z, z->zch_size);
59 }
60