2 * Copyright (c)2006 YAMAMOTO Takashi,
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 /* From $NetBSD: vmem.h,v 1.20 2013/01/29 21:26:24 para Exp $ */
33 #include <sys/types.h>
37 typedef struct vmem vmem_t;
39 typedef uintptr_t vmem_addr_t;
40 typedef size_t vmem_size_t;
42 #define VMEM_ADDR_MIN 0
43 #define VMEM_ADDR_MAX (~(vmem_addr_t)0)
45 typedef int (vmem_import_t)(void *, vmem_size_t, int, vmem_addr_t *);
46 typedef void (vmem_release_t)(void *, vmem_addr_t, vmem_size_t);
47 typedef void (vmem_reclaim_t)(vmem_t *, int);
51 * name - Name of the region
52 * base - Initial span start (optional)
53 * size - Initial span size
54 * quantum - Natural unit of allocation (ie PAGE_SIZE, 1, etc)
55 * qcache_max - Maximum size to quantum cache. This creates a UMA
56 * cache for each multiple of quantum up to qcache_max.
59 vmem_t *vmem_create(const char *name, vmem_addr_t base,
60 vmem_size_t size, vmem_size_t quantum, vmem_size_t qcache_max, int flags);
61 vmem_t *vmem_init(vmem_t *vm, const char *name, vmem_addr_t base,
62 vmem_size_t size, vmem_size_t quantum, vmem_size_t qcache_max, int flags);
63 void vmem_destroy(vmem_t *);
66 * Set callbacks for bringing in dynamic regions:
67 * importfn - Backing store import routine.
68 * releasefn - Backing store release routine.
69 * arg - Backing store argument
70 * import_quantum - Size to import from backing store
73 void vmem_set_import(vmem_t *vm, vmem_import_t *importfn,
74 vmem_release_t *releasefn, void *arg, vmem_size_t import_quantum);
77 * Set a callback for reclaiming memory when space is exhausted:
79 void vmem_set_reclaim(vmem_t *vm, vmem_reclaim_t *reclaimfn);
82 * Allocate and free linear regions from a vmem. Must specify
83 * BESTFIT or FIRSTFIT. Free is non-blocking. These routines
84 * respect the quantum caches.
86 int vmem_alloc(vmem_t *vm, vmem_size_t size, int flags, vmem_addr_t *addrp);
87 void vmem_free(vmem_t *vm, vmem_addr_t addr, vmem_size_t size);
90 * Constrained allocate and free routines. These bypass the quantum cache.
91 * size - Size in units of 1, not quantum.
92 * align - Required alignment of the start of region
93 * phase - Offset from alignment
94 * nocross - Illegal boundary
95 * minaddr - Minimum allowed address for last byte
96 * maxaddr - Maximum allowed address for first byte
100 int vmem_xalloc(vmem_t *vm, vmem_size_t size, vmem_size_t align,
101 vmem_size_t phase, vmem_size_t nocross, vmem_addr_t minaddr,
102 vmem_addr_t maxaddr, int flags, vmem_addr_t *addrp);
103 void vmem_xfree(vmem_t *vm, vmem_addr_t addr, vmem_size_t size);
106 * Add a static region to a vmem after create. This won't be freed
107 * until the vmem is destroyed.
109 int vmem_add(vmem_t *vm, vmem_addr_t addr, vmem_size_t size, int flags);
112 * Given roundup size to the vmem's native quantum size.
114 vmem_size_t vmem_roundup_size(vmem_t *vm, vmem_size_t size);
117 * Report vmem utilization according to the requested type.
119 vmem_size_t vmem_size(vmem_t *vm, int typemask);
121 void vmem_whatis(vmem_addr_t addr, int (*fn)(const char *, ...)
123 void vmem_print(vmem_addr_t addr, const char *, int (*fn)(const char *, ...)
125 void vmem_printall(const char *, int (*fn)(const char *, ...)
127 void vmem_startup(void);
129 /* vmem_size typemask */
130 #define VMEM_ALLOC 0x01
131 #define VMEM_FREE 0x02
132 #define VMEM_MAXFREE 0x10
136 #endif /* !_SYS_VMEM_H_ */