137 lines
4.7 KiB
C
137 lines
4.7 KiB
C
/*-
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* Copyright (c)2006 YAMAMOTO Takashi,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* From $NetBSD: vmem.h,v 1.20 2013/01/29 21:26:24 para Exp $ */
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/* $FreeBSD$ */
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#ifndef _SYS_VMEM_H_
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#define _SYS_VMEM_H_
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#include <sys/types.h>
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#ifdef _KERNEL
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typedef struct vmem vmem_t;
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typedef uintptr_t vmem_addr_t;
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typedef size_t vmem_size_t;
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#define VMEM_ADDR_MIN 0
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#define VMEM_ADDR_MAX (~(vmem_addr_t)0)
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typedef int (vmem_import_t)(void *, vmem_size_t, int, vmem_addr_t *);
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typedef void (vmem_release_t)(void *, vmem_addr_t, vmem_size_t);
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typedef void (vmem_reclaim_t)(vmem_t *, int);
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/*
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* Create a vmem:
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* name - Name of the region
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* base - Initial span start (optional)
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* size - Initial span size
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* quantum - Natural unit of allocation (ie PAGE_SIZE, 1, etc)
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* qcache_max - Maximum size to quantum cache. This creates a UMA
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* cache for each multiple of quantum up to qcache_max.
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* flags - M_* flags
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*/
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vmem_t *vmem_create(const char *name, vmem_addr_t base,
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vmem_size_t size, vmem_size_t quantum, vmem_size_t qcache_max, int flags);
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vmem_t *vmem_init(vmem_t *vm, const char *name, vmem_addr_t base,
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vmem_size_t size, vmem_size_t quantum, vmem_size_t qcache_max, int flags);
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void vmem_destroy(vmem_t *);
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/*
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* Set callbacks for bringing in dynamic regions:
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* importfn - Backing store import routine.
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* releasefn - Backing store release routine.
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* arg - Backing store argument
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* import_quantum - Size to import from backing store
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*/
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void vmem_set_import(vmem_t *vm, vmem_import_t *importfn,
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vmem_release_t *releasefn, void *arg, vmem_size_t import_quantum);
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/*
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* Set a callback for reclaiming memory when space is exhausted:
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*/
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void vmem_set_reclaim(vmem_t *vm, vmem_reclaim_t *reclaimfn);
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/*
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* Allocate and free linear regions from a vmem. Must specify
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* BESTFIT or FIRSTFIT. Free is non-blocking. These routines
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* respect the quantum caches.
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*/
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int vmem_alloc(vmem_t *vm, vmem_size_t size, int flags, vmem_addr_t *addrp);
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void vmem_free(vmem_t *vm, vmem_addr_t addr, vmem_size_t size);
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/*
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* Constrained allocate and free routines. These bypass the quantum cache.
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* size - Size in units of 1, not quantum.
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* align - Required alignment of the start of region
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* phase - Offset from alignment
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* nocross - Illegal boundary
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* minaddr - Minimum allowed address for last byte
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* maxaddr - Maximum allowed address for first byte
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* flags - M_* flags
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* addrp - result
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*/
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int vmem_xalloc(vmem_t *vm, vmem_size_t size, vmem_size_t align,
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vmem_size_t phase, vmem_size_t nocross, vmem_addr_t minaddr,
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vmem_addr_t maxaddr, int flags, vmem_addr_t *addrp);
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void vmem_xfree(vmem_t *vm, vmem_addr_t addr, vmem_size_t size);
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/*
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* Add a static region to a vmem after create. This won't be freed
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* until the vmem is destroyed.
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*/
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int vmem_add(vmem_t *vm, vmem_addr_t addr, vmem_size_t size, int flags);
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/*
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* Given roundup size to the vmem's native quantum size.
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*/
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vmem_size_t vmem_roundup_size(vmem_t *vm, vmem_size_t size);
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/*
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* Report vmem utilization according to the requested type.
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*/
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vmem_size_t vmem_size(vmem_t *vm, int typemask);
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void vmem_whatis(vmem_addr_t addr, int (*fn)(const char *, ...)
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__printflike(1, 2));
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void vmem_print(vmem_addr_t addr, const char *, int (*fn)(const char *, ...)
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__printflike(1, 2));
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void vmem_printall(const char *, int (*fn)(const char *, ...)
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__printflike(1, 2));
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void vmem_startup(void);
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/* vmem_size typemask */
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#define VMEM_ALLOC 0x01
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#define VMEM_FREE 0x02
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#define VMEM_MAXFREE 0x10
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#endif /* _KERNEL */
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#endif /* !_SYS_VMEM_H_ */
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